A detection device, a communication device, a detection method, and a communication system

Abstract

The application discloses a detection device, a communication device, a detection method and a communication system, and belongs to the technical field of optical path-based communication and is used for transmission fault detection of an optical transmission path. The optical transmission path comprises a local optical module assembly, a plurality of local wavelength division optical link groups, a local multiplexer / demultiplexer and a plurality of remote wavelength division optical link groups which are coupled in sequence. The detection precision of the OTDR detection function is greater than the filtering precision of the multiplexer / demultiplexer, so that transmission faults on different optical links coupled by the multiplexer / demultiplexer can be detected. In the manner, an additional detection device is not needed, and the conventional device for realizing optical transmission based on the multiplexer / demultiplexer can realize cross-link comprehensive detection of different optical links coupled by the multiplexer / demultiplexer. The application can realize low-cost, high-precision and comprehensive detection of transmission faults of the optical transmission path and can be applied to front transmission networking of wireless communication or optical communication networking.

Description

TECHNICAL FIELD

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

[0002] In the field of communication technology, two communication devices can realize the interaction of communication services through an optical transmission path. The optical transmission path includes a plurality of local branch optical links, a main optical link and a plurality of remote branch optical links. The local communication device sends a plurality of different or same service optical signals to the main optical link through the plurality of local branch optical links, and the main optical link transmits the plurality of service optical signals to the plurality of remote branch optical links. The remote communication device obtains the service optical signals sent by the local communication device from the plurality of remote branch optical links. Alternatively, the remote communication device can also send a plurality of service optical signals to the local communication device through the plurality of remote branch optical links, the main optical link and the plurality of local branch optical links. In actual application, according to the distance between the two communication devices, the length of the optical transmission path to be laid is also different. When a transmission fault occurs on the transmission path, it is usually difficult to determine the occurrence position of the transmission fault on the optical transmission path, which causes great difficulty in the inspection and maintenance of the fault of the optical transmission path, thereby greatly affecting the service interaction of the two communication devices.

[0003] One way to detect the transmission fault of the optical transmission path is to set an optical time domain reflectometer to detect the fault of the optical link to detect the occurrence position of the fault. However, this detection method can only detect the fault of the backbone link. When the optical transmission path includes a backbone link and a plurality of different slave links, it is impossible to realize the cross-link fault detection of the different slave links. SUMMARY

[0004] The embodiments of the present application provide a detection device, a communication device, a detection method and a communication system for comprehensive detection of transmission faults at different positions of the optical transmission path.

[0005] To achieve the above object, the embodiments of the present application adopt the following technical solutions:

[0006] In a first aspect, a detection device is provided for detecting a transmission fault of an optical transmission path. The optical transmission path includes a local optical module assembly, a plurality of local wavelength division optical link groups, a local multiplexer / demultiplexer, and a plurality of remote wavelength division optical link groups coupled in sequence; the plurality of local wavelength division optical link groups are coupled with a plurality of filtering ends of the local multiplexer / demultiplexer; a multiplexing end of the local multiplexer / demultiplexer is coupled with the plurality of remote wavelength division optical link groups; the local optical module assembly is integrated with an OTDR detection function; a detection precision of the OTDR detection function is greater than a filtering precision of the local multiplexer / demultiplexer. The detection device is configured to: in response to first alarm information, output different fault indication signals according to whether the local optical module assembly detects a filtered leakage optical signal from the plurality of local wavelength division optical link groups based on the OTDR detection function; the first alarm information is used to indicate that a first local wavelength division optical link group in the plurality of local wavelength division optical link groups fails to interact with a service optical signal; and the fault indication signals are used to indicate that the transmission fault occurs in the first local wavelength division optical link group or in a first remote wavelength division optical link group corresponding to the first local wavelength division optical link group.

[0007] In the embodiments of the present application, based on the characteristic that the detection precision of the OTDR detection function is greater than the filtering precision of the multiplexer / demultiplexer, the detection device can detect whether there is a filtered leakage optical signal on different links coupled with the multiplexer / demultiplexer, determine the specific location of the transmission fault according to the detection result, and output different fault indication signals to indicate the optical link where the transmission fault occurs. In this way, without the need to set additional devices, the detection of the transmission fault can be achieved by using conventional devices for realizing optical transmission based on the multiplexer / demultiplexer, and cross-link detection of different optical links coupled with the multiplexer / demultiplexer can be achieved. The present scheme realizes low-cost, high-precision, and comprehensive detection of transmission faults in the optical transmission path, and can be applied to the front-haul networking of wireless communication to realize comprehensive detection of optical transmission faults.

[0008] In a possible implementation, the first local wavelength division optical link group includes a first local upstream link and a first local downstream link; the first remote wavelength division optical link group includes a first remote upstream link and a first remote downstream link; and the local optical module assembly is integrated with the OTDR detection function for any local downstream link in the plurality of local wavelength division optical link groups. In this case, when the first alarm information is received (the first alarm information is used to indicate that the first local wavelength division optical link group in the plurality of local wavelength division optical link groups fails to interact with the service optical signal), it is necessary to determine whether the transmission fault occurs in the local or the remote, and whether the transmission fault occurs in the upstream link or the downstream link, and according to different actual situations, the output of different fault indication signals according to whether the local optical module assembly detects the filtered leakage optical signal from the plurality of local wavelength division optical link groups based on the OTDR detection function can include the following scenarios:

[0009] In some examples, the local optical module assembly is integrated with an OTDR detection function for any of the local downlinks in the local WDM link group. When the first electrical signal is not received and the first leakage electrical signal is received from the local optical module assembly within a first time, a first fault indication signal is outputted; the first fault indication signal is used to indicate that the transmission fault occurs in the first local uplink; the first electrical signal is used to indicate that within the first time, the local optical module assembly inputs the first optical signal from the first remote uplink and the first local uplink; the first leakage electrical signal is used to indicate that within the first time, the local optical module assembly detects the filtered leakage optical signal of the first optical signal from any of the local downlinks based on the OTDR detection function. In the embodiments of the present application, if the first electrical signal is not received within the first time, it proves that the first local uplink and the first remote uplink have transmission faults. If the first leakage electrical signal is received within the first time, it proves that the first remote uplink is normal, and then the transmission fault occurs in the first local uplink.

[0010] In some examples, the local optical module assembly is integrated with an OTDR detection function for any of the local downlinks in the local WDM link group. When the first electrical signal is not received and the first leakage electrical signal is received from the local optical module assembly within a first time, a first fault indication signal is outputted; the first fault indication signal is used to indicate that the transmission fault occurs in the first local uplink; the first electrical signal is used to indicate that within the first time, the local optical module assembly inputs the first optical signal from the first remote uplink and the first local uplink; the first leakage electrical signal is used to indicate that within the first time, the local optical module assembly detects the filtered leakage optical signal of the first optical signal from any of the local downlinks based on the OTDR detection function. In the embodiments of the present application, if the first electrical signal is not received within the first time, it proves that the first local uplink and the first remote uplink have transmission faults. If the first leakage electrical signal is received within the first time, it proves that the first remote uplink is normal, and then the transmission fault occurs in the first local uplink.

[0011] In some examples, the local optical module assembly is integrated with an OTDR detection function for the second local downlink of the second local WDM link group. In a second time after the first time, the local optical module assembly is controlled to output a first detection optical signal to the first local downlink. When a first electrical signal is received from the local optical module assembly in the first time and a second leakage electrical signal is received from the local optical module assembly in the second time, a third fault indication signal is outputted; the third fault indication signal is used to indicate that a transmission fault occurs in the first remote downlink; the first electrical signal is used to indicate that in the first time, the local optical module assembly inputs a first optical signal from the first remote uplink and the first local uplink; the second leakage electrical signal is used to indicate that in the second time, the local optical module assembly detects a filtered leakage optical signal of the first detection optical signal from the second local downlink based on the OTDR detection function. In the embodiments of the present application, if the first electrical signal is received in the first time, it proves that the first local uplink and the first remote uplink normally transmit the first optical signal, and then the transmission fault exists between the first local downlink and the first remote downlink. If the second leakage electrical signal is received in the second time, it proves that the first local downlink normally transmits the first detection optical signal, and then the transmission fault occurs in the first local downlink.

[0012] In some examples, the local optical module assembly is integrated with an OTDR detection function for the second local downlink of the second local WDM link group. When a first electrical signal is received from the local optical module assembly in the first time and a second leakage electrical signal is not received from the local optical module assembly in the second time, a fourth fault indication signal is outputted; the fourth fault indication signal is used to indicate that a transmission fault occurs in the first local downlink. In the embodiments of the present application, if the first electrical signal is received in the first time, it proves that the first local uplink and the first remote uplink normally transmit the first optical signal, and then the transmission fault exists between the first local downlink and the first remote downlink. If the second leakage electrical signal is not received in the second time, it proves that the first local downlink fails to transmit the first detection optical signal, and then the transmission fault occurs in the first local downlink.

[0013] In some examples, the local optical module assembly is integrated with an OTDR detection function for the first local downlink. When a first electrical signal is received from the local optical module assembly in a first time, a second detection optical signal is sent from the local optical module assembly to the first local downlink in a second time after the first time; the first electrical signal is used to indicate that in the first time, the local optical module assembly inputs a first optical signal from the first remote uplink and the first local uplink, inputs a first detection electrical signal from the local optical module assembly; the first detection electrical signal is an electrical signal obtained by the local optical module assembly based on the OTDR detection function according to a first echo optical signal; the first echo optical signal is an echo optical signal of the second detection optical signal; a fifth fault indication signal is output according to the first detection electrical signal; the fifth fault indication signal is used to indicate the occurrence position of the transmission fault on the first remote downlink, or is used to indicate the occurrence position of the transmission fault on the first local downlink. In the embodiments of the present application, when the first electrical signal is received in the first time, it is proved that the first local uplink and the first remote uplink normally transmit the first optical signal, and then the transmission fault exists between the first local downlink and the first remote downlink. Since the OTDR detection function is integrated for the first local downlink, the position of the transmission fault on the first local downlink or the first remote downlink can be directly determined by the OTDR detection function.

[0014] In some possible embodiments, the local wavelength division optical link group and the remote wavelength division optical link group can use uplink and downlink multiplexing links to realize the interaction of uplink optical signals and downlink optical signals. At this time, the first local wavelength division optical link group includes a first local uplink and downlink multiplexing link; the first remote wavelength division optical link group includes a first remote uplink and downlink multiplexing link. In this application scenario, it is necessary to detect and confirm whether the transmission fault occurs in the local or the remote. According to different actual situations, the above-mentioned output of different fault indication signals based on whether the local optical module assembly detects the filtered leakage optical signal from the plurality of local wavelength division optical links based on the OTDR detection function can include the following cases:

[0015] In some examples, the first local WDM link group includes a first local uplink / downlink multiplexing link; the first remote WDM link group includes a first remote uplink / downlink multiplexing link; and the local optical module assembly integrates an OTDR detection function for a second local uplink / downlink multiplexing link of the second local WDM link group. At this time, the local optical module assembly is controlled to send a third detection optical signal to the first local uplink / downlink multiplexing link. When a third leakage electrical signal is received from the local optical module assembly, a sixth fault indication signal is output; the sixth fault indication signal is used to indicate that the transmission fault occurs in the first remote uplink / downlink multiplexing link; and the third leakage electrical signal is used to indicate that the local optical module assembly detects a filtered leakage optical signal of the third detection optical signal from the second local uplink / downlink multiplexing link based on the OTDR detection function. In the embodiments of the present application, when the first alarm information occurs, the third detection optical signal can be sent to the first local uplink / downlink multiplexing link. If the filtered leakage optical signal of the third detection optical signal can be detected from the second local uplink / downlink multiplexing link by the OTDR detection function integrated for the second local uplink / downlink multiplexing link, it is proved that the first local uplink / downlink multiplexing link can normally transmit the third detection optical signal, and it can be confirmed that the transmission fault occurs in the first remote uplink / downlink multiplexing link.

[0016] In some examples, the first local WDM link group includes a first local uplink / downlink multiplexing link; the first remote WDM link group includes a first remote uplink / downlink multiplexing link; and the local optical module assembly integrates an OTDR detection function for a second local uplink / downlink multiplexing link of the second local WDM link group. At this time, the local optical module assembly is controlled to send a third detection optical signal to the first local uplink / downlink multiplexing link. When a third leakage electrical signal is received from the local optical module assembly, a sixth fault indication signal is output; the sixth fault indication signal is used to indicate that the transmission fault occurs in the first remote uplink / downlink multiplexing link; and the third leakage electrical signal is used to indicate that the local optical module assembly detects a filtered leakage optical signal of the third detection optical signal from the second local uplink / downlink multiplexing link based on the OTDR detection function. In the embodiments of the present application, when the first alarm information occurs, the third detection optical signal can be sent to the first local uplink / downlink multiplexing link. If the filtered leakage optical signal of the third detection optical signal can be detected from the second local uplink / downlink multiplexing link by the OTDR detection function integrated for the second local uplink / downlink multiplexing link, it is proved that the first local uplink / downlink multiplexing link can normally transmit the third detection optical signal, and it can be confirmed that the transmission fault occurs in the first remote uplink / downlink multiplexing link.

[0017] In a possible implementation, the detection device is a communication device. The detection device is further configured to interact with the service optical signal through the optical transmission path. In response to the first alarm information, the detection device stops the interaction with the service optical signal. In the embodiments of the present application, the communication device at the local end can be used as the detection device. At this time, the detection device can also stop the interaction with the service optical signal to reduce the detection of the filtered leakage optical signal, thereby improving the accuracy of the transmission fault detection.

[0018] In a possible implementation, the detection device is an optical monitoring device. The local optical module assembly is further coupled with a communication device. The communication device interacts with the service optical signals through the optical transmission path. The detection device is further configured to output a first control signal to the communication device in response to the first alarm information, the first control signal being used to control the communication device to stop interacting with the service optical signals. In the embodiments of the present application, when the detection device is an independent device other than the local communication device, the local communication device can stop interacting with the service optical signals in response to the first alarm information, or the detection device can send the first control signal to the local communication device to control the communication device to stop interacting with the service optical signals, thereby improving the transmission accuracy of detecting the transmission fault.

[0019] In a possible implementation, the optical transmission path further includes a main optical link. The combining end of the local combining and splitting filter is coupled with a plurality of remote wavelength division optical link groups through the main optical link. The local optical module assembly integrates an OTDR detection function for any local downlink in the plurality of local wavelength division optical link groups. The detection device is further configured to control the local optical module assembly to send a fourth detection optical signal to any local downlink in response to second alarm information, the second alarm information being used to indicate that the plurality of local wavelength division optical link groups and the plurality of remote wavelength division optical link groups cannot interact with the service optical signals. A second detection electrical signal is input from the local optical module assembly, the second detection electrical signal being an electrical signal obtained by the local optical module assembly based on the OTDR detection function according to a second echo optical signal, the second echo optical signal being an echo optical signal of the fourth detection optical signal. An eighth fault indication signal is output according to the second detection electrical signal, the eighth fault indication signal being used to indicate a position of the transmission fault on the main optical link. In the embodiments of the present application, when all the wavelength division optical link groups cannot interact with the service optical signals, it indicates that the main optical link has a transmission fault. At this time, the integrated OTDR detection function can be used to directly detect and locate the transmission fault of the main optical link.

[0020] In a second aspect, the embodiments of the present application further provide a communication device configured to interact with service optical signals through an optical transmission path. The optical transmission path includes a first optical module assembly, a plurality of first wavelength division optical link groups, a combining and splitting filter, and a plurality of second wavelength division optical link groups coupled in sequence. Each first wavelength division optical link group includes a remote uplink and a remote downlink. The communication device is configured to control the first optical module assembly to send a first optical signal to an uplink of a certain first wavelength division optical link group in the plurality of first wavelength division optical link groups within a first time in response to remote alarm information, the remote alarm information being used to indicate that a certain wavelength division optical link group in the plurality of first wavelength division optical link groups cannot interact with the service optical signals.

[0021] Exemplarily, the first optical module assembly is a remote optical module assembly in the first aspect, and the plurality of first wave division optical link groups are a plurality of remote wave division optical link groups in the first aspect. The certain first wave division optical link group is a first remote wave division optical link group in the plurality of wave division optical link groups in the first aspect that cannot interact with the service optical signal. In the embodiment of the application, when the first remote wave division optical link group in the plurality of remote wave division optical link groups cannot interact with the service optical signal, the communication device controls the remote optical module assembly to send the first optical signal to the first remote uplink of the first remote wave division optical link group in the first aspect within a first time after receiving the remote alarm information. The first optical signal assists the detection device in the first aspect in detecting the transmission fault position.

[0022] In a possible implementation, the communication device is further configured to: stop the interaction with the service optical signal in response to the remote alarm information. In the embodiment of the application, when the detection device in the first aspect needs to detect the transmission fault, both communication parties stop the interaction with the service optical signal, and the detection accuracy of the transmission fault can be improved.

[0023] In the third aspect, the embodiment of the application further provides a detection method for detecting a transmission fault of an optical transmission path. The optical transmission path includes a local optical module assembly, a plurality of local wave division optical link groups, a local multiplexer and a plurality of remote wave division optical link groups that are coupled in sequence; the plurality of local wave division optical link groups are coupled with a plurality of filter ends of the local multiplexer; a multiplexing end of the local multiplexer is coupled with the plurality of remote wave division optical link groups; the local optical module assembly is integrated with an OTDR detection function; and the detection accuracy of the OTDR detection function is greater than the filtering accuracy of the local multiplexer. The method includes: in response to a first alarm information, obtaining different fault indication signals according to whether the local optical module assembly detects a filter leakage optical signal from the plurality of local wave division optical link groups based on the OTDR detection function. The first alarm information is used to indicate that a first local wave division optical link group in the plurality of local wave division optical link groups cannot interact with the service optical signal; and the fault indication signal is used to indicate that the transmission fault occurs in the first local wave division optical link group or in a first remote wave division optical link group corresponding to the first local wave division optical link group.

[0024] In a possible implementation, the first local WDM link group includes a first local uplink and a first local downlink; the first remote WDM link group includes a first remote uplink and a first remote downlink; and the local OLM component integrates an OTDR detection function for any local downlink in the plurality of local WDM link groups. At this time, when the first alarm information (indicating that the first local WDM link group in the plurality of local WDM link groups fails to interact with the service optical signal) is received, it is necessary to determine whether the transmission failure occurs in the local or remote, and whether the transmission failure occurs in the uplink or downlink. According to different actual situations, the above-mentioned output of different failure indication signals based on whether the local OLM component detects the filtered leakage optical signal from the plurality of local WDM link groups based on the OTDR detection function can include the following scenarios:

[0025] In some examples, the local OLM component integrates an OTDR detection function for any local downlink in the plurality of local WDM link groups. When the first electrical signal is not received from the local OLM component and the first leakage electrical signal is received within a first time, a first failure indication signal is output; the first failure indication signal indicates that the transmission failure occurs in the first local uplink; the first electrical signal indicates that the local OLM component inputs the first optical signal from the first remote uplink and the first local uplink within the first time; and the first leakage electrical signal indicates that the local OLM component detects the filtered leakage optical signal of the first optical signal from any local downlink based on the OTDR detection function within the first time.

[0026] In some examples, the local OLM component integrates an OTDR detection function for any local downlink in the plurality of local WDM link groups. When the first electrical signal and the first leakage electrical signal are not received from the local OLM component within a first time, a second failure indication signal is output; and the second failure indication signal indicates that the transmission failure occurs in the first remote uplink. In the embodiments of the present application, if the first electrical signal cannot be received within the first time, it proves that the first local uplink and the first remote uplink have transmission failure. If the first leakage electrical signal cannot be received within the first time, it proves that the first remote uplink fails to transmit the first optical signal, and then the transmission failure occurs in the first local uplink.

[0027] In some examples, the local optical module assembly is integrated with an OTDR detection function for the second local downlink of the second local wavelength division optical link group. The local optical module assembly is controlled to output a first detection optical signal to the first local downlink at a second time after a first time. When a first electrical signal is received from the local optical module assembly at the first time and a second leakage electrical signal is received from the local optical module assembly at the second time, a third fault indication signal is outputted; the third fault indication signal is used to indicate that the transmission fault occurs in the first remote downlink; the first electrical signal is used to indicate that the first optical signal is inputted to the local optical module assembly from the first remote uplink and the first local uplink at the first time; the second leakage electrical signal is used to indicate that the filtered leakage optical signal of the first detection optical signal is detected by the local optical module assembly from the second local downlink based on the OTDR detection function at the second time.

[0028] In some examples, the local optical module assembly is integrated with an OTDR detection function for the second local downlink of the second local wavelength division optical link group. When a first electrical signal is received from the local optical module assembly at a first time and a second leakage electrical signal is not received from the local optical module assembly at a second time, a fourth fault indication signal is outputted; the fourth fault indication signal is used to indicate that the transmission fault occurs in the first local downlink.

[0029] In some examples, the local optical module assembly is integrated with an OTDR detection function for the first local downlink. When a first electrical signal is received from the local optical module assembly at a first time, the local optical module assembly is controlled to send a second detection optical signal to the first local downlink at a second time after the first time; the first electrical signal is used to indicate that the first optical signal is inputted to the local optical module assembly from the first remote uplink and the first local uplink at the first time. A first detection electrical signal is inputted from the local optical module assembly; the first detection electrical signal is an electrical signal obtained by the local optical module assembly based on the OTDR detection function according to a first echo optical signal; the first echo optical signal is an echo optical signal of the second detection optical signal. A fifth fault indication signal is outputted according to the first detection electrical signal; the fifth fault indication signal is used to indicate a position of the transmission fault on the first remote downlink or a position of the transmission fault on the first local downlink.

[0030] In some possible implementation manners, the local WDM link group and the remote WDM link group can implement the interaction of the uplink optical signal and the downlink optical signal by using the uplink and downlink multiplexing link. At this time, the first local WDM link group includes a first local uplink and downlink multiplexing link; the first remote WDM link group includes a first remote uplink and downlink multiplexing link. In this application scenario, it is necessary to detect and confirm whether the transmission failure occurs at the local end or the remote end. According to different actual situations, the above-mentioned outputting, by the local optical module assembly, of different failure indication signals according to whether the OTDR detection function detects the filtered leakage optical signal from the plurality of local WDM link groups can include the following cases:

[0031] In some examples, the first local WDM link group includes a first local uplink and downlink multiplexing link; the first remote WDM link group includes a first remote uplink and downlink multiplexing link; and the local optical module assembly integrates the OTDR detection function for a second local uplink and downlink multiplexing link of a second local WDM link group. At this time, the local optical module assembly is controlled to send a third detection optical signal to the first local uplink and downlink multiplexing link. When a third leakage electrical signal is received from the local optical module assembly, a sixth failure indication signal is outputted; the sixth failure indication signal is used to indicate that the transmission failure occurs at the first remote uplink and downlink multiplexing link; and the third leakage electrical signal is used to indicate that the OTDR detection function of the local optical module assembly detects the filtered leakage optical signal of the third detection optical signal from the second local uplink and downlink multiplexing link.

[0032] In some examples, the first local WDM link group includes a first local uplink and downlink multiplexing link; the first remote WDM link group includes a first remote uplink and downlink multiplexing link; and the local optical module assembly integrates the OTDR detection function for a second local uplink and downlink multiplexing link of a second local WDM link group. At this time, the local optical module assembly is controlled to send a third detection optical signal to the first local uplink and downlink multiplexing link. When a third leakage electrical signal is received from the local optical module assembly, a sixth failure indication signal is outputted; the sixth failure indication signal is used to indicate that the transmission failure occurs at the first remote uplink and downlink multiplexing link; and the third leakage electrical signal is used to indicate that the OTDR detection function of the local optical module assembly detects the filtered leakage optical signal of the third detection optical signal from the second local uplink and downlink multiplexing link.

[0033] In a possible implementation manner, the method is executed based on the communication device; and the method further includes: in response to the first alarm information, stopping the interaction of the service optical signal.

[0034] In a possible implementation manner, the method is executed based on the optical monitoring device; and the method further includes: in response to the first alarm information, outputting, to the communication device, a first control signal, the first control signal being used to control the communication device to stop the interaction of the service optical signal.

[0035] In a possible implementation, the optical transmission path further comprises a main optical link; the combining end of the local end multiplexer is coupled to the plurality of remote wavelength division optical link groups through the main optical link; and the local optical module assembly is integrated with an OTDR detection function for any local downlink in the plurality of local wavelength division optical link groups. The method further comprises: in response to the second alarm information, controlling the local optical module assembly to send a fourth detection optical signal to any local downlink; and the second alarm information is used to indicate that the plurality of local wavelength division optical link groups and the plurality of remote wavelength division optical link groups cannot interact with the service optical signal. The second detection electrical signal is input from the local optical module assembly; the second detection electrical signal is an electrical signal obtained by the local optical module assembly based on the OTDR detection function according to a second echo optical signal; and the second echo optical signal is an echo optical signal of the fourth detection optical signal. An eighth fault indication signal is obtained according to the second detection electrical signal; and the eighth fault indication signal is used to indicate a position of the transmission fault on the main optical link.

[0036] In a fourth aspect, the embodiments of the present application further provide a detection method based on a communication device. The communication device is used to interact with a service optical signal through an optical transmission path. The optical transmission path comprises a remote optical module assembly, a plurality of remote wavelength division optical link groups, a multiplexer, and a plurality of local wavelength division optical link groups coupled in sequence. Each local wavelength division optical link group comprises a local uplink and a local downlink. The method comprises: in response to remote alarm information, controlling the remote optical module assembly to send a first optical signal to an uplink of a certain remote wavelength division optical link group in the plurality of remote wavelength division optical link groups within a first time; and the remote alarm information is used to indicate that a certain wavelength division optical link group in the plurality of first wavelength division optical link groups cannot interact with the service optical signal.

[0037] In a possible implementation, the method further comprises: in response to the remote alarm information, stopping the interaction with the service optical signal.

[0038] In a fifth aspect, the embodiments of the present application further provide a communication system, which comprises a detection device and an optical transmission path. The optical transmission path comprises, in sequence, a local optical module assembly, a plurality of local wavelength division optical link groups, a local multiplexer / demultiplexer, a plurality of remote wavelength division optical link groups and a remote optical module assembly. The plurality of local wavelength division optical link groups are coupled with a plurality of filtering ends of the local multiplexer / demultiplexer. A multiplexing end of the local multiplexer / demultiplexer is coupled with the plurality of remote wavelength division optical link groups. The local optical module assembly is integrated with an OTDR detection function. The detection precision of the OTDR detection function is greater than the filtering precision of the local multiplexer / demultiplexer. The optical transmission path is configured to interact with service optical signals. The detection device is configured to interact with the remote communication device with the service optical signals. In response to a local alarm information, the detection device outputs different fault indication signals according to whether the local optical module assembly detects a filtered leakage optical signal from the plurality of local wavelength division optical link groups based on the OTDR detection function. The local alarm information is configured to indicate that a first local wavelength division optical link group in the plurality of local wavelength division optical link groups fails to interact with the service optical signals. The fault indication signals are configured to indicate that a transmission fault occurs in the first local wavelength division optical link group or a first remote wavelength division optical link group corresponding to the first local wavelength division optical link group.

[0039] In a possible implementation, the first local wavelength division optical link group comprises a first local uplink and a first local downlink. The first remote wavelength division optical link group comprises a first remote uplink and a first remote downlink. The local optical module assembly is integrated with the OTDR detection function for any local downlink in the plurality of local wavelength division optical link groups. The communication system further comprises a remote communication device and a remote optical module assembly. The remote communication device is coupled with the plurality of remote wavelength division optical link groups through the remote optical module assembly. The remote communication device is configured to, in response to a remote alarm information, control the remote optical module assembly to send a first optical signal to the first remote uplink within a first time. The remote alarm information is configured to indicate that the first remote wavelength division optical link group fails to interact with the service optical signals. The detection device is configured to, in response to the local alarm information, output different fault indication signals. When a first electrical signal is not received from the local optical module assembly and a first leakage electrical signal is received within the first time, a first fault indication signal is output. The first fault indication signal is configured to indicate that a transmission fault occurs in the first remote uplink. The first electrical signal is configured to indicate that the local optical module assembly inputs the first optical signal from the first remote uplink and the first local uplink. The first leakage electrical signal is configured to indicate that the local optical module assembly detects a filtered leakage optical signal of the first optical signal from any local downlink based on the OTDR detection function. Or, when the first electrical signal and the first leakage electrical signal are not received from the local optical module assembly within the first time, a second fault indication signal is output. The second fault indication signal is configured to indicate that a transmission fault occurs in the first local uplink.

[0040] In a possible implementation, the first local WDM link group includes a first local uplink and a first local downlink. The first remote WDM link group includes a first remote uplink and a first remote downlink. The local OLT component integrates an OTDR detection function for the second local downlink of the second local WDM link group. The remote communication device is configured to: in response to the remote alarm information, control the remote OLT component to send a first optical signal to the first remote uplink within a first time period; and the remote alarm information is used to indicate that the first remote WDM link group fails to interact with the service optical signal. The detection device is configured to: in response to the local alarm information, control the local OLT component to output a first detection optical signal to the first local downlink within a second time period after the first time period. When a first electrical signal is received from the local OLT component within the first time period and a second leakage electrical signal is received from the local OLT component within the second time period, a third fault indication signal is output. The third fault indication signal is used to indicate that a transmission fault occurs in the first remote downlink. The first electrical signal is used to indicate that the local OLT component inputs the first optical signal from the first remote uplink and the first local uplink within the first time period. The second leakage electrical signal is used to indicate that the local OLT component detects a filtered leakage optical signal of the first detection optical signal from the second local downlink based on the OTDR detection function within the second time period. Alternatively, when the first electrical signal is received from the local OLT component within the first time period and the second leakage electrical signal is not received from the local OLT component within the second time period, a fourth fault indication signal is output. The fourth fault indication signal is used to indicate that a transmission fault occurs in the first local downlink.

[0041] In a possible implementation, the detection device is a local communication device. The detection device is further configured to: in response to the local alarm information, stop interacting with the service optical signal.

[0042] In a possible implementation, the detection device is an optical monitoring device. The communication system further includes a local communication device. The detection device is further configured to: in response to the local alarm information, output a first control signal to the local communication device; and the first control signal is used to control the communication device to stop interacting with the service optical signal.

[0043] In a sixth aspect, the embodiments of the present application further provide a computer readable storage medium, which includes instructions. When the instructions are run on a processor, the processor executes the method according to the third aspect or the method according to the fourth aspect.

[0044] The technical principles and beneficial effects of the second aspect, the third aspect, the fourth aspect, the fifth aspect and the sixth aspect can be referred to the related description of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 A structure diagram of a single-link transmission fault detection based on OTDR;

[0046] Figure 2 A structure diagram of a multi-link transmission fault detection based on OTDR;

[0047] Figure 3 A structure diagram of a communication system provided by an embodiment of the present application Figure 1 ;

[0048] Figure 4 A structure diagram of another communication system provided by an embodiment of the present application Figure 2 ;

[0049] Figure 5 A structure diagram of a local end combining and splitting wave filter provided by an embodiment of the present application

[0050] Figure 6 A structure diagram of another communication system provided by an embodiment of the present application Figure 3 ;

[0051] Figure 7 A structure diagram of another communication system provided by an embodiment of the present application Figure 4 ;

[0052] Figure 8 A diagram of a detection electric signal based on OTDR provided by an embodiment of the present application

[0053] Figure 9 A structure diagram of another communication system provided by an embodiment of the present application Figure 5 ;

[0054] Figure 10 A structure diagram of another communication system provided by an embodiment of the present application Figure 6 ;

[0055] Figure 11 A flow diagram of a first detection method provided by an embodiment of the present application Figure 1 ;

[0056] Figure 12 A flow diagram of another first detection method provided by an embodiment of the present application Figure 2 ;

[0057] Figure 13 A flow diagram of a second detection method provided by an embodiment of the present application

[0058] Figure 14 A flow diagram of a third detection method provided by an embodiment of the present application. Detailed Implementation

[0059] It should be noted that the terms "first" and "second" used in the embodiments of this application are only used to distinguish features of the same type and should not be construed as indicating relative importance, quantity, order, etc.

[0060] The terms "exemplary" or "for example" used in the embodiments of this application are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0061] The terms "coupling" and "connection" used in the embodiments of this application should be interpreted broadly. For example, they can refer to a physical direct connection or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.

[0062] An optical time-domain reflectometer (OTDR) is an optoelectronic instrument that detects the backscattered echo light signals generated by Rayleigh scattering and Fresnel reflection when optical signals are transmitted in optical fibers. By detecting the echo light signals, the location of the transmission fault in the optical fiber can be determined.

[0063] like Figure 1 The diagram illustrates one method of transmission fault detection using an OTDR. A network monitor N monitors the transmission status of the optical fiber via a wavelength division multiplexing (WDM). When a transmission fault is detected, it sends an alarm message to the control unit K. Upon receiving the alarm message, the control unit K controls the OTDR's transmitting module to transmit a detection optical signal via the WDM, and the OTDR's receiving module receives the echo signal from the WDM. By analyzing the echo signal, the location of the transmission fault on the optical fiber can be determined. However, this method is only suitable for detecting a single coupled backbone link in the optical transmission path. If multiple links exist in the optical transmission path, the OTDR cannot perform cross-link detection on other uncoupled links.

[0064] When an optical fiber transmitting optical signals comprises multiple different links, additional equipment is required to assist in detecting these multiple links. For example... Figure 2As shown, the central office equipment J is coupled to multiple branch optical fibers via the trunk fiber and splitter F1, and is coupled to multiple terminal equipment Z via these branch optical fibers. When the OTDR needs to detect transmission faults in different branch optical fibers, the OTDR can detect the optical links accessed by different optical network units (ONUs) based on the delay splitter F2 and optical reflectors H. This scheme couples the OTDR to multiple links, delays the optical signals on different optical links using the delay splitter, and receives the echo optical signals from different optical links through the OTDR to identify different optical links. However, this scheme still requires the OTDR to be coupled to different links. Additionally, it requires additional delay splitters F and multiple optical reflectors H. This approach complicates the communication system layout and increases costs. Furthermore, it is not suitable for scenarios without the necessary hardware configuration, nor for scenarios where delay splitters F2 and optical reflectors H cannot be configured.

[0065] This application provides a communication system, such as... Figure 3 As shown, the communication system 10000 includes a local communication device 1000, an optical transmission path 2000, and a remote communication device 3000. The local communication device 1000 interacts with the remote communication device 3000 through the optical transmission path 2000 for service communication.

[0066] In order to detect transmission faults in the optical transmission path 2000 of the communication system 10000, such as... Figure 4 As shown, the communication system 10000 also includes a detection device X, which is used to detect transmission faults in the optical transmission path 2000. The optical transmission path 2000 includes, in sequence, a local optical module component 210, multiple local wavelength division multiplexing (WDM) link groups 220, a local multiplexer / demultiplexer 230, a main optical link 240, a remote multiplexer / demultiplexer 250, multiple remote WDM link groups 260, and a remote optical module component 270. The detection device X is coupled to the local optical module component 210. The remote communication device 3000 is coupled to the remote optical module component 270. The multiple local WDM link groups 220 are coupled to multiple filter ends of the local multiplexer / demultiplexer 230. The multiplexing end of the local multiplexer / demultiplexer 230 is coupled to the multiple remote WDM link groups 260. The local optical module component 210 integrates an OTDR detection function; the detection accuracy of the OTDR function is greater than the filtering accuracy of the local multiplexer / demultiplexer. The detection device X is used for:

[0067] In response to the first alarm message, depending on whether the local optical module component 210 detects a filtered leakage optical signal from multiple local wavelength division multiplexing link groups 220 based on the OTDR detection function, different fault indication signals are output; the first alarm message is used to indicate that the first local wavelength division multiplexing link group 221 among the multiple local wavelength division multiplexing link groups 220 cannot interact with service optical signals; the fault indication signal is used to indicate that the transmission failure occurs in the first local wavelength division multiplexing link group 221, or that the transmission failure occurs in the first remote wavelength division multiplexing link group 261 corresponding to the first local wavelength division multiplexing link group 221.

[0068] For example, such as Figure 5 The diagram shows the structural principle of a multiplexer / demultiplexer. Multiple dielectric film filters J1 and fiber optic connectors J2 are integrated within the multiple multiple dielectric film filters. The first end of each dielectric film filter J1 serves as the filtering end of the multiple multiple multiple dielectric film filters J1, and the second ends of each filter J1 are coupled to the fiber optic connectors J2. The fiber optic connectors J2 are used to combine optical signals of different wavelengths received by each dielectric film filter. The first end of one of the dielectric film filters J1 also serves as the combining end of the multiplexer / demultiplexer and is coupled to the main optical link 240 for exchanging optical signals with the main optical link 240. Taking the multiplexer / demultiplexer 230 as an example, multiple local wavelength division multiplexing optical link groups 220 are coupled to the first ends (i.e., filtering ends) of the multiple dielectric film filters J1. The first end of each dielectric film filter J1 is used to filter out optical signals of the corresponding wavelength, and the local wavelength division multiplexing optical link 220 coupled to the first end of a specific dielectric film filter J1 transmits the optical signal of the corresponding wavelength. The second end of the dielectric film filter J1 combines optical signals of different wavelengths through the fiber optic connector J2 and sends them from the combining end to the main optical link 240. Alternatively, it receives optical signals of different wavelengths from the main optical link 240 and filters them through the first ends of different dielectric film filters J1 to output optical signals of different wavelengths to the corresponding local wavelength division multiplexing (WDM) link group 220. In this embodiment, theoretically, the first end of each dielectric film filter J1 can only output the corresponding wavelength optical signal. However, devices have signal processing precision, and filters also have signal filtering precision. Therefore, the first end of the dielectric film filter J1 can only achieve filtering above a certain signal strength, and will still output optical signals of other wavelengths below that signal strength. OTDR detection accuracy is usually very high, and it can detect signals that have not been filtered by the dielectric film filter J1, i.e., filtered leakage optical signals. By detecting whether there are filtered leakage optical signals on the local multiplexer / demultiplexer 230, it is possible to detect whether there are transmission faults at all locations on the optical transmission path 2000.

[0069] In the embodiment of the present application, the OTDR detection function is integrated on the local optical module assembly 210. By using the detection accuracy of the OTDR detection function which is greater than the filtering accuracy of the local multiplexer / demultiplexer 230, it is realized that whether there is a filter leakage optical signal on the multiple local wavelength division optical link groups 220 coupled by the local multiplexer / demultiplexer 230. Each filter leakage optical signal represents that a certain local wavelength division optical link group 220 or a certain remote wavelength division optical link group 260 can normally transmit or receive optical signals. By detecting the filter leakage optical signal, the transmission fault of all links on the optical transmission path 2000 can be detected. By using the present scheme, the full range detection of the optical transmission path 2000 can be realized without adding additional devices. Compared with the prior art, the present scheme does not increase the device cost of the communication system 10000, improves the detection range and accuracy of the transmission fault, and can also be applied to more application scenarios of the communication system 10000.

[0070] In some possible implementations, the uplink optical signal and the downlink optical signal are transmitted by using different links. Each wavelength division optical link group includes an uplink and a downlink. At this time, the position of the transmission fault on the optical transmission path 2000 can be as follows: position one: the transmission fault occurs on the main optical link 240; position two: the transmission fault occurs on the uplink of the local wavelength division optical link group 220; position three: the transmission fault occurs on the downlink of the local wavelength division optical link group 220; position four: the transmission fault occurs on the uplink of the remote wavelength division optical link group 260; and position five: the transmission fault occurs on the downlink of the remote wavelength division optical link group 260. When the transmission fault occurs on the optical transmission path 2000, the local detection device X and the remote communication device 3000 at the remote end can both receive corresponding alarm information, and different alarm information is used to indicate that different links cannot interact with the service optical signal. According to the different alarm information, different ways can be used to output the fault indication signal to indicate that there is a transmission fault at the corresponding position. When multiple local wavelength division optical link groups 220 do not fail at the same time, the remote communication device 3000 receives the remote alarm information, and the remote alarm information is used to indicate that the first remote wavelength division optical link group 261 in the multiple remote wavelength division optical link groups 260 cannot interact with the service optical signal with the corresponding first local wavelength division optical link group 221.

[0071] In the first time after receiving the remote alarm information, the remote communication device 3000 is configured to: in response to the remote alarm information, control the first optical module assembly to transmit the first optical signal to the uplink of a certain first wavelength division optical link group in the multiple first wavelength division optical link groups within the first time; and the alarm information is used to indicate that a certain wavelength division optical link group cannot interact with the service optical signal. For example, as shown in FIG. 6, the remote communication device 3000 receives the remote alarm information, and the remote alarm information is used to indicate that the first remote wavelength division optical link group 261 cannot interact with the service optical signal with the first local wavelength division optical link group 221. In this case, the remote communication device 3000 controls the first optical module assembly to transmit the first optical signal to the uplink of the first wavelength division optical link group 221 within the first time. Figure 6As shown, the first optical module assembly is a remote optical module assembly 270, and the plurality of first wave division optical link groups is a plurality of remote wave division optical link groups 260. The aforementioned certain first wave division optical link group is a first remote wave division optical link group 261 in the plurality of wave division optical link groups that cannot interact with the service optical signals. In the embodiment of the present application, when the first remote wave division optical link group 261 in the plurality of remote wave division optical link groups 260 cannot interact with the service optical signals, the remote communication device 3000 will control the remote optical module assembly 270 to send a first optical signal to a first remote uplink 261 A of the first remote wave division optical link group 261 within a first time after receiving the remote alarm information. The first optical signal is used to assist the detection device X to detect the transmission fault position. Based on the first optical signal, the detection device X can output different fault indication signals in response to the first alarm information according to whether the local optical module assembly 210 detects the filtered leakage optical signal from the plurality of local wave division optical link groups 220 based on the OTDR detection function. Specifically, the following fault indication signals can be outputted:

[0072] In some examples, the detection device X can output a first fault indication signal to indicate that the transmission fault occurs in the first remote uplink 261 A. As shown, Figure 6 When the first electrical signal indicating that the local optical module assembly 210 inputs the first optical signal from the first remote uplink 261 A and the first local uplink 221 A within the first time and the first leakage electrical signal indicating that the local optical module assembly 210 detects the filtered leakage optical signal of the first optical signal from any local downlink based on the OTDR detection function are not received within the first time, the first fault indication signal is outputted to indicate that the transmission fault occurs in the first local uplink 221 A.

[0073] In the embodiment of the present application, as shown, Figure 7As shown, a plurality of optoelectronic conversion circuits 211, a compiling processing circuit 212 and an electrical signal interaction interface 213 are arranged in the local optical module assembly 210. The detection device X is coupled with the local optical module assembly 210 through the electrical signal interaction interface 213 to interact with the service electrical signal. The electrical signal interaction interface 213 is coupled with the plurality of optoelectronic conversion circuits 211 through the compiling processing circuit 212, and is coupled with the uplink and downlink of the plurality of local wavelength division optical link groups 220 through the plurality of optoelectronic conversion circuits 211 respectively. Because the first local wavelength division optical link group 221 and the first remote wavelength division optical link group 261 cannot interact with the service optical signal, and not all of the wavelength division optical link groups 221 can interact with the service optical signal, it can be determined that the main optical link 240 has no transmission failure. Within the first time after receiving the remote alarm information, the remote communication device 3000 will control the remote optical module assembly 270 to send a first optical signal to the first remote uplink 261A. If the first remote uplink 261A has no transmission failure, the first optical signal can be transmitted from the first remote uplink 261A to the main optical link 240, and from the main optical link 240 to the local add-drop multiplexer 230. If the first local uplink 221A has no transmission failure, the local optical module assembly 210 can receive the first optical signal from the first local uplink 221A, and convert the first optical signal into an electrical signal through the corresponding optoelectronic conversion circuit 211, and output the first electrical signal from the electrical signal interaction interface 213 after compiling processing by the compiling processing circuit 212. Therefore, if the first electrical signal is not received within the first time, it is proved that there is a transmission failure between the first local uplink 221A and the first remote uplink 261A. At this time, if the first optical signal is transmitted to the local add-drop multiplexer 230, based on the OTDR detection function integrated in any local downlink in the local optical module assembly 210, the filtered leakage optical signal of the first optical signal can be detected from the local downlink integrated with the OTDR detection function. The local optical module assembly 210 can output a first filtered electrical signal according to the filtered leakage optical signal of the first optical signal. At this time, it is proved that if the detection device X does not receive the first electrical signal from the local optical module assembly 210 within the first time, and receives the first leakage electrical signal, the detection device X can output a first failure indication signal to indicate that the transmission failure occurs in the first local uplink 221A.

[0074] In some examples, the detection device X can output a second failure indication signal to indicate that the transmission failure occurs in the first remote uplink 261A. As Figure 6 and Figure 7As shown, when the first electrical signal and the first leakage electrical signal are not received from the local optical module assembly 210 within the first time, a second fault indication signal is output. In the embodiments of the present application, when neither the first electrical signal nor the first leakage electrical signal is received, it can be determined that the first optical signal is not transmitted to the local multiplexer / demultiplexer 230, and then the detection device X can output the second fault indication signal to indicate that the transmission fault occurs on the first remote uplink 261A.

[0075] In some examples, when the OTDR detection function of the local optical module assembly 210 is not integrated at the first local downlink 221B of the first local wavelength division optical link 221, but is integrated at the second local downlink 222B of the second local wavelength division optical link group 222, the detection device X can output a third fault indication signal to indicate that the transmission fault occurs on the first remote downlink 261B. As shown in FIG. 2, the OTDR detection function of the local optical module assembly 210 is integrated at the second local downlink 222B of the second local wavelength division optical link group 222. Figure 6 and Figure 7As shown, the detection device X is further configured to control the local optical module assembly 210 to output a first detection optical signal to the first local downlink 221B at a second time after the first time. When the first electrical signal is received from the local optical module assembly 210 at the first time and the second leakage electrical signal is received from the local optical module assembly 210 at the second time, a third fault indication signal is output. The first electrical signal is used to indicate that the first optical signal is input to the local optical module assembly 210 from the first remote uplink 261A and the first local uplink 221A at the first time. The second leakage electrical signal is used to indicate that the filtered leakage optical signal of the first detection optical signal is detected by the local optical module assembly 210 from the second local downlink 222B based on the OTDR detection function at the second time. In the embodiment of the present application, when the first electrical signal is received at the first time, it proves that there is no transmission fault between the first local uplink 221A and the first remote uplink 261A, and the transmission fault of the first local wave division optical link group 221 and the first remote wave division optical link group 261 occurs between the first local downlink 221B and the first remote downlink 261B. At this time, the detection device X can control the local optical module assembly 210 to send the first detection optical signal to the first local downlink 221B at the second time after the first time. Since the OTDR detection function is integrated on the second local downlink 222B of the second local wave division optical link group 222, whether there is the filtered leakage optical signal of the first detection optical signal on the second local downlink 222B can be detected by the OTDR detection function. If there is the filtered leakage optical signal of the first detection optical signal on the second local downlink 222B, it proves that the first local downlink 221B can normally transmit the first detection optical signal, and the local optical module assembly 210 can output the second leakage electrical signal to the detection device X based on the filtered leakage optical signal of the first detection optical signal. The detection device X outputs the third fault indication signal according to the second leakage electrical signal to indicate that the transmission fault occurs in the first remote downlink 261B.

[0076] In some examples, when the OTDR detection function of the local optical module assembly 210 is not integrated on the first local downlink 221B of the first local wave division optical link group 221, but is integrated on the second local downlink 222B of the second local wave division optical link group 222, the detection device X can output a fourth fault indication signal to indicate that the transmission fault occurs in the first local downlink 221B. As Figure 6 and Figure 7As shown, when the first electrical signal is received from the local optical module assembly 210 at the first time, and the second leakage electrical signal is not received from the local optical module assembly 210 at the second time, the fourth fault indication signal is output. The fourth fault indication signal is used to indicate that the transmission fault occurs at the first local downlink 221B. In the embodiment of the present application, when the first electrical signal is received at the first time, it proves that there is no transmission fault between the first local uplink 221A and the first remote uplink 261A. And, the second leakage electrical signal is not received at the second time, which proves that the transmission fault occurs at the first local downlink 221B.

[0077] In some examples, when the local optical module assembly 210 integrates the OTDR detection function for the first local downlink 221B, the detection device X can output the fifth fault indication signal to indicate the occurrence position of the transmission fault on the first remote downlink 261B, or, to indicate the occurrence position of the transmission fault on the first local downlink 221B. As shown, Figure 6 and Figure 7 As shown, the detection device X is configured to: when the first electrical signal is received from the local optical module assembly 210 at the first time, control the local optical module assembly 210 to send the second detection optical signal to the first local downlink 221B at a second time after the first time. The first electrical signal is used to indicate that the first optical signal is input from the first remote uplink 261A and the first local uplink 221A to the local optical module assembly 210 at the first time. The first detection electrical signal is input from the local optical module assembly 210; the first detection electrical signal is an electrical signal obtained by the local optical module assembly 210 based on the OTDR detection function according to the first echo optical signal; the first echo optical signal is an echo optical signal of the second detection optical signal. The fifth fault indication signal is output according to the first detection electrical signal; the fifth fault indication signal is used to indicate the occurrence position of the transmission fault on the first remote downlink 261B, or, to indicate the occurrence position of the transmission fault on the first local downlink 221B. In the embodiment of the present application, when the first electrical signal is received from the local optical module assembly 210 at the first time, it proves that there is no transmission fault between the first local uplink 221A and the first remote uplink 261A, and the transmission fault of the first local wavelength division optical link group 221 and the first remote wavelength division optical link group 261 occurs between the first local downlink 221B and the first remote downlink 261B. Because the local optical module assembly 210 integrates the OTDR detection function for the first local downlink 221B, the second detection optical signal can be directly sent to the first local downlink 221B through the local optical module assembly 210. The second detection optical signal is transmitted to the first remote downlink 261B through the main optical link 240. As shown, Figure 8As shown, the OTDR detection function is used to obtain a detection electrical signal based on the echo optical signal. A Fresnel reflection is generated at the location of the transmission fault on the optical link, forming a strong reflection peak. The location of the transmission fault on the optical link can be located according to the location of the reflection peak in the detection electrical signal. The OTDR detection function can detect the echo optical signal of the second detection optical signal, and directly determine the location of the transmission fault on the first remote downlink 261B, the main optical link 240, or the first local downlink 221B according to the detection result.

[0078] In summary, when Figure 6 and Figure 7 In the embodiment shown, the uplink optical signal and the downlink optical signal are transmitted by different links. Each wave division optical link group includes an uplink and a downlink. The fault location of the uplink and the downlink of the local wave division optical link group and the uplink and the downlink of the remote wave division optical link group can be achieved by the implementation manner of the above embodiment.

[0079] In some possible implementations, the uplink optical signal and the downlink optical signal are transmitted by the same link. Each wave division optical link group includes an uplink and a downlink. At this time, the transmission faults of different links can also be detected by filtering the leakage optical signal:

[0080] In some examples, when the local optical module assembly 210 is the first local wave division optical link group 221 integrated with the OTDR detection function. As shown, Figure 9 the detection device X can directly transmit a detection optical signal to the first local uplink and downlink 221C of the first local wave division optical link group 221 based on the OTDR detection function, and determine the location of the transmission fault on the first local uplink and downlink 221C, the main optical link 240, or the first remote uplink and downlink 261C according to the echo optical signal of the detection optical signal.

[0081] In some examples, when the local optical module assembly 210 is the second uplink and downlink 222C of the second local wave division optical link group 222 integrated with the OTDR detection function, the detection device X can output a sixth fault indication signal to indicate that the transmission fault occurs in the first remote uplink and downlink 261C. As shown, Figure 9As shown, the detection device X is configured to control the local optical module assembly 210 to send a third detection optical signal to the first local uplink / downlink multiplexing link 221C in response to the first alarm information. When a third leakage electrical signal is received from the local optical module assembly 210, a sixth fault indication signal is outputted, which is used to indicate that the transmission fault occurs on the first remote uplink / downlink multiplexing link 261C. The third leakage electrical signal is used to indicate that the local optical module assembly 210 detects a filtered leakage optical signal of the third detection optical signal from the second local uplink / downlink multiplexing link 222C based on the OTDR detection function. In the embodiments shown in

[0082] In some examples, when the local optical module assembly 210 is integrated with the OTDR detection function for the second uplink / downlink multiplexing link 222C of the second local wavelength division optical link group 222, the detection device X can output a seventh fault indication signal to indicate that the transmission fault occurs on the first local uplink / downlink multiplexing link 221C. As shown in Figure 9 As shown, the detection device X is configured to output the seventh fault indication signal when the third leakage electrical signal is not received from the local optical module assembly 210, and the seventh fault indication signal is used to indicate that the transmission fault occurs on the first local uplink / downlink multiplexing link 221C. In the embodiments shown in

[0083] In some possible embodiments, in the embodiments shown in Figure 6 , Figure 7 and Figure 9 , the detection device X can output an eighth fault indication signal to indicate the location of the transmission fault on the main optical link 240. For example, as shown in Figure 6 , Figure 7 and Figure 9As shown, the detection device X is further configured to: in response to the second alarm information, control the local optical module assembly 210 to send a fourth detection optical signal to any local downlink; the second alarm information is used to indicate that the plurality of local WDM link groups 220 and the plurality of remote WDM link groups 260 cannot interact with the service optical signal. Input a second detection electrical signal from the local optical module assembly 210; the second detection electrical signal is an electrical signal obtained by the local optical module assembly 210 based on the OTDR detection function according to a second echo optical signal; the second echo optical signal is an echo optical signal of the fourth detection optical signal. Output an eighth fault indication signal according to the second detection electrical signal; the eighth fault indication signal is used to indicate the occurrence position of the transmission fault on the main optical link 240. In the embodiment of the present application, when the alarm information received by the detection device X is the second alarm information instead of the first alarm information, it represents that all the local WDM link groups 220 and the remote WDM link groups 260 cannot interact with the service optical signal. In general, the probability of simultaneous occurrence of transmission faults of all the local WDM link groups 220 and the remote WDM link groups 260 is extremely small. At this time, the transmission fault can be determined to occur on the main optical link 240 through the second alarm information, and the echo optical signal of the fourth detection optical signal can be detected through the OTDR detection function integrated in the local optical module assembly 210, so as to directly determine the specific position of the transmission fault on the main optical link.

[0084] In some possible embodiments, when the first alarm information occurs, all the service optical signals can be suspended to improve the detection accuracy of the filtered leakage optical signal.

[0085] In some examples, as shown in Figure 4 , Figure 6 , Figure 7 and Figure 9 , the detection device X is the local communication device 1000. At this time, the local communication device 1000 (or the detection device X) is further configured to: in response to the first alarm information, stop interacting with the service optical signal.

[0086] In some examples, as shown in Figure 10 , the detection device X can be an optical monitoring device arranged in the communication system 10000 for detecting the state of the optical signal transmission and managing. At this time, the detection device X can output a first control signal to the local communication device 1000, and the first control signal is used to control the communication device to stop interacting with the service optical signal.

[0087] In some possible embodiments, the local optical module assembly 210 can be an optical module, and the optical module is integrated with an optoelectronic conversion circuit 211 and the like for each local WDM link group 220.

[0088] In some possible implementation manners, the local optical module assembly 210 can include a plurality of optical modules, and the plurality of optical modules are respectively coupled to the plurality of local wave division optical link groups 220.

[0089] In some implementation manners, the communication system 10000 can be an optical communication system. At this time, the local communication device 1000 and the remote communication device 3000 are optical communication devices.

[0090] In some implementation manners, the communication system 10000 can be a wireless communication system. For example, a wireless communication base station. At this time, the local communication device 1000 and the remote communication device 3000 are wireless communication devices. Exemplarily, the communication system 10000 can be a front-haul networking in wireless communication. In some examples, the local communication device 1000 can be a building base band unit (BBU) in the front-haul networking. The remote communication device 3000 can be a remote radio unit (RRU) or an active antenna unit (AAU) in the front-haul networking. In some examples, the local communication device 1000 can be a RRU or an AAU in the front-haul networking. The remote communication device 3000 can be a BBU in the front-haul networking. In the embodiments of the present application, taking the CRAN networking in wireless communication as an example, in the CRAN networking, the number of optical transmission path failures of the communication system constituted by the front-haul networking accounts for about 30% of the total number of failures of the CRAN networking. In the front-haul networking, many devices such as RRUs, BBUs, optical module assemblies, optical fibers, and combining / splitting filters are involved, and the laying paths of the optical links are different from each other and are between 1 km and 10 km. In the front-haul network, no delay splitter F2 and optical reflector H are arranged. Compared with the optical communication system, it is more difficult to locate the transmission failure of the optical transmission path 2000 in the front-haul network of the wireless communication system. The method recorded in the above embodiments can comprehensively, quickly and accurately locate the transmission failure of the optical transmission path in the wireless communication system.

[0091] Based on the above Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 10 The communication system 10000 shown in the structure can execute the following Figure 11 The first detection method shown in the structure includes steps S110-S130:

[0092] The first detection method is applied to the remote communication device 3000, and specifically includes the following steps:

[0093] S110, in response to the alarm information, outputting the first optical signal.

[0094] In some possible implementation manners, the communication device interacts with another communication device on a service optical signal. After receiving alarm information that a certain optical link group cannot interact with the service optical signal, within a first time, the first optical module component is controlled to send a first optical signal to a first uplink of a certain first optical link group in the at least one first wave division optical link group; the alarm information is used to indicate that the certain optical link group cannot interact with the service optical signal.

[0095] Exemplarily, as shown in Figure 6 and Figure 7 , the remote communication device 3000 controls the remote optical module component 270 to send a first optical signal to a first remote uplink 261A of a first remote wave division optical link group 261 which cannot interact with the service optical signal within a first time in response to the remote alarm information.

[0096] In some possible implementation manners, the remote communication device 3000 is further configured to: in response to the alarm information, stop interacting with the service optical signal.

[0097] The second detection method is applied to the detection device X, and specifically includes the following steps:

[0098] S120, receiving an electrical signal from the local optical module component 210.

[0099] In the embodiment of the application, the first alarm information is used to indicate that a first local wave division optical link group 221 in a plurality of local wave division optical link groups 220 and a first remote wave division optical link group 261 in a plurality of remote wave division optical link groups 260 cannot interact with the service optical signal. In the embodiment of the application, the first alarm information can be one or more, and the plurality of first alarm information is respectively used to indicate that different local wave division optical link groups 220 cannot interact with the corresponding remote wave division optical link groups 260. When all the local wave division optical link groups 220 cannot interact with the corresponding remote wave division optical link groups 260, the alarm information received by the detection device X is the second alarm information. When the first alarm information is received, it represents that part of the local wave division optical link groups 220 in the whole cannot interact with the service optical signal, and the main optical link 240 has no transmission failure. The transmission failure occurs at the first local wave division optical link group 221 which cannot interact with the service optical signal or the corresponding first remote wave division optical link group 261.

[0100] In some possible implementation manners, S120 can include the following sub-operations of step S121 to step S122 as shown in Figure 12

[0101] ​S121, detecting the first electrical signal and the first leakage electrical signal from the local optical module assembly 210 within the first time.

[0102] As shown in Figure 6 and Figure 7 , if one of the first remote uplink 261A and the first local uplink 221A has a transmission failure, the first electrical signal cannot be output from the local optical module assembly 210 within the first time. At this time, based on the OTDR detection function of the local optical module assembly 210, if the first leakage electrical signal (electrical signal obtained based on the filtered leakage optical signal of the first optical signal) can be output from the local optical module assembly 210, it proves that the first optical signal is transmitted to the local optical module assembly 210, the first remote uplink 261A is working normally, and the transmission failure occurs in the first local uplink 221A. If the first electrical signal and the first leakage electrical signal cannot be output from the local optical module assembly 210, it proves that the transmission failure occurs in the first local uplink 221A.

[0103] As shown in Figure 6 , Figure 7 , when the remote communication device 3000 controls the remote optical module assembly 270 to send the first optical signal to the first remote uplink 261A, if the first electrical signal obtained based on the first optical signal can be output from the local optical module assembly 210 within the first time, it proves that neither the first remote uplink 261A nor the first local uplink 221A has a transmission failure. At this time, the detection device X needs to perform the operation of step S122 to determine that the transmission failure occurs in the first remote downlink 261B or the first local downlink 221B.

[0104] S122, controlling the local optical module assembly 210 to output a detection optical signal to the first local downlink 221B within a second time.

[0105] As shown in Figure 6 and Figure 7 , when the local optical module assembly 210 does not integrate the OTDR detection function for the first local downlink 221B, and the second local optical module assembly 210 integrates the OTDR detection function for the second local downlink 222B of the second local wave division optical link group 222. The detection device X can control the local optical module assembly 210 to output the first detection optical signal to the first local downlink 221B within the second time after the first time in response to the first alarm information. If the filtered leakage optical signal of the first detection optical signal can be detected from the second local downlink 222B based on the OTDR detection function of the local optical module assembly 210, the second leakage electrical signal can be obtained. According to the second leakage electrical signal, it can be determined that the first local downlink 221B can normally transmit.

[0106] Exemplarily, as shown in Figure 6 and Figure 7 When the local optical module assembly 210 does not integrate the OTDR detection function for the first local downlink 221B, and integrates the OTDR detection function for the second local downlink 222B of the second local wavelength division optical link group 222, if the filtered leakage optical signal of the first detection optical signal is not detected from the second local downlink 222B of the second local wavelength division optical link group 222 within the second time, it can be determined that the transmission failure occurs at the first local downlink 221B.

[0107] Exemplarily, as shown in Figure 6 and Figure 7 When the local optical module assembly 210 integrates the OTDR detection function for the first local downlink 221B, the specific position of the transmission failure occurring on the first remote downlink 261B, the main optical link 240 and the first local downlink 221B can be directly detected and positioned based on the OTDR detection function. At this time, in response to the first alarm information, when the first electrical signal is received from the local optical module assembly 210 within the first time, the local optical module assembly 210 is controlled to send the second detection optical signal to the first local downlink 221B within the second time after the first time. The first echo optical signal is obtained according to the second detection optical signal, the first detection electrical signal corresponding to the first echo optical signal is subjected to the OTDR detection, and the position of the transmission failure is determined according to the reflection peak position of the OTDR detection.

[0108] S130, output different fault indication signals according to different electrical signals.

[0109] Exemplarily, when the first electrical signal is not received from the local optical module assembly 210 within the first time and the first leakage electrical signal is received, the first fault indication signal is obtained; the first fault indication signal is used to indicate that the transmission failure occurs at the first local uplink 221A.

[0110] Exemplarily, when the first electrical signal and the first leakage electrical signal are not received from the local optical module assembly 210 within the first time, the second fault indication signal is obtained; the second fault indication signal is used to indicate that the transmission failure occurs at the first remote uplink 261A.

[0111] Exemplarily, when the first electrical signal is received from the local optical module assembly 210 within the first time, and the second leakage electrical signal is received from the local optical module assembly 210 within the second time, the third fault indication signal is obtained; the third fault indication signal is used to indicate that the transmission failure occurs at the first remote downlink 261B.

[0112] Exemplarily, when the first electrical signal is received from the local optical module assembly 210 at a first time, and the second leakage electrical signal is not received from the local optical module assembly 210 at a second time, a fourth fault indication signal is obtained; the fourth fault indication signal is used to indicate that the transmission fault occurs at the first local downlink 221B.

[0113] Exemplarily, when the first electrical signal is received from the local optical module assembly 210 at a first time, and the first detection electrical signal is received at a second time, a fifth fault indication signal is output according to the first detection electrical signal. The fifth fault indication signal is used to indicate the position where the transmission fault occurs on the first remote downlink 261B, or is used to indicate the position where the transmission fault occurs on the first local downlink 221B.

[0114] In the embodiment of the present application, when the uplink optical signal and the downlink optical signal are transmitted by using different links. Each wave division optical link group includes an uplink and a downlink. The first optical signal can be transmitted by the remote communication device 3000. And at the detection device X at the local end, the detection optical signal can be transmitted. According to the receiving conditions of the first optical signal and the detection optical signal by the local optical module assembly 210, the transmission faults at different positions are determined, and different fault indication signals are output according to the determination results to indicate the transmission faults at the corresponding positions.

[0115] Based on the communication system 10000 shown in the above Figure 4 , Figure 5 , Figure 9 , Figure 10 , the uplink optical signal and the downlink optical signal are transmitted by using the same link. Each wave division optical link group includes an uplink and a downlink. The first optical signal can be transmitted by the remote communication device 3000. And at the detection device X at the local end, the detection optical signal can be transmitted. According to the receiving conditions of the first optical signal and the detection optical signal by the local optical module assembly 210, the transmission faults at different positions are determined, and different fault indication signals are output according to the determination results to indicate the transmission faults at the corresponding positions. Figure 13 The second detection method shown in the above

[0116] S210, in response to the first alarm information, the local optical module assembly 210 is controlled to transmit a detection optical signal.

[0117] Exemplarily, the local optical module assembly 210 can be controlled to transmit the detection optical signal to the first local uplink and downlink multiplexing link 221C.

[0118] S220, an electrical signal is received from the local optical module assembly 210.

[0119] Exemplarily, when the local optical module assembly 210 does not integrate the OTDR detection function for the first local uplink and downlink multiplexing link 221C of the first local wavelength division optical link group 221, and integrates the OTDR detection function for the second local uplink and downlink multiplexing link 222C of the second local wavelength division optical link group 222, the detection device X can control the local optical module assembly 210 to send a third detection optical signal to the first local uplink and downlink multiplexing link 221C. When the first local uplink and downlink multiplexing link 221C works normally, the local multiplexer / demultiplexer 230 can receive the third detection optical signal. Then the local optical module assembly 210 can detect a filtered leakage optical signal of the third detection optical signal from the second local uplink and downlink multiplexing link 222C, and obtain a third leakage electrical signal according to the filtered leakage optical signal of the third detection optical signal. Therefore, when the local optical module assembly 210 outputs the third leakage electrical signal, it represents that the first local uplink and downlink multiplexing link 221C can work normally, and the transmission fault occurs in the first remote uplink and downlink multiplexing link 261C.

[0120] Exemplarily, when the local optical module assembly 210 does not integrate the OTDR detection function for the first local uplink and downlink multiplexing link 221C of the first local wavelength division optical link group 221, and integrates the OTDR detection function for the second local uplink and downlink multiplexing link 222C of the second local wavelength division optical link group 222, the detection device X can control the local optical module assembly 210 to send a third detection optical signal to the first local uplink and downlink multiplexing link 221C. If the detection device X fails to receive the third leakage electrical signal from the local optical module assembly 210, it proves that the transmission fault occurs in the first local uplink and downlink multiplexing link 221C.

[0121] Exemplarily, when the local optical module assembly 210 integrates the OTDR detection function for the first local uplink and downlink multiplexing link 221C of the first local wavelength division optical link group 221, the occurrence position of the transmission fault can be directly detected and determined based on the OTDR detection function.

[0122] S230, output different fault indication signals according to different electrical signals.

[0123] Exemplarily, when the local optical module assembly 210 does not integrate the OTDR detection function for the first local uplink and downlink multiplexing link 221C of the first local wavelength division optical link group 221, and integrates the OTDR detection function for the second local uplink and downlink multiplexing link 222C of the second local wavelength division optical link group 222, when the third leakage electrical signal is received from the local optical module assembly 210, a sixth fault indication signal is outputted; the sixth fault indication signal is used to indicate that the transmission fault occurs in the first remote uplink and downlink multiplexing link 261C.

[0124] Exemplarily, when the local optical module assembly 210 does not integrate the OTDR detection function for the first local uplink and downlink multiplexing link 221C of the first local wavelength division optical link group 221, and integrates the OTDR detection function for the second local uplink and downlink multiplexing link 222C of the second local wavelength division optical link group 222, when the third leakage electrical signal is not received from the local optical module assembly 210, the seventh fault indication signal is output; the seventh fault indication signal is used to indicate that the transmission fault occurs in the first local uplink and downlink multiplexing link 221C.

[0125] Exemplarily, when the local optical module assembly 210 integrates the OTDR detection function for the first local uplink and downlink multiplexing link 221C of the first local wavelength division optical link group 221, the ninth fault indication signal is output based on the OTDR detection function. The ninth fault indication signal directly indicates the occurrence position of the transmission fault in the first local uplink and downlink multiplexing link 221C, or the occurrence position of the transmission fault in the first remote uplink and downlink multiplexing link 261C. The related technical principles and technical effects of the ninth fault indication signal can be referred to the foregoing related description of the fifth fault indication signal, and will not be described herein.

[0126] In some possible implementation manners, in the detection method as described above in Figure 11 , Figure 12 and Figure 13 , the following operation can be further included: stopping the interactive service optical signal through the optical transmission path 2000. In some examples, the detection device X as shown in Figure 4 , Figure 6 , Figure 7 and Figure 9 is the local communication device 1000. At this time, the local communication device 1000 (or referred to as the detection device X) is further used to: in response to the first alarm information, stop the interactive service optical signal. In some examples, as shown in Figure 10 , the detection device X can be an optical monitoring device provided in the communication system 10000 and used to detect and manage the state of the optical signal transmission. At this time, the detection device X can output a first control signal to the local communication device 1000, and the first control signal is used to control the communication device to stop the interactive service optical signal. In the embodiment of the present application, by stopping all the local wavelength division optical link groups 220 to stop the interactive service signal, the detection accuracy of the filter leakage optical signal can be improved.

[0127] In some possible implementation manners, when multiple first local wavelength division optical link groups 221 that cannot interact with the service optical signal exist at the same time (not all the local wavelength division optical link groups 220 cannot interact with the service optical signal), the first detection method or the second detection method described above can be used to detect and locate the transmission fault for each first local wavelength division optical link group 221.

[0128] Based on the above Figure 4 、 Figure 6 、 Figure 7 、 Figure 9 and Figure 10 The communication system 10000 shown in the structure can be based on the third control method comprising steps S310-S330 when all local wavelength division optical link groups 220 cannot interact with service optical signals as shown in the following Figure 14

[0129] S310, in response to the second alarm information, sending a fourth detection optical signal to the local downlink.

[0130] In the embodiments of the present application, in the structure shown in the above Figure 4 、 Figure 6 、 Figure 7 、 Figure 9 and Figure 10 When the second alarm information is received, it means that all local wavelength division optical link groups 220 cannot interact with service optical signals. Because the probability of simultaneous failure of all local wavelength division optical link groups 220 and all remote wavelength division optical link groups 260 is very low, the transmission failure can be determined to occur in the main optical link 240 according to the second alarm information. At this time, the local optical module assembly 210 integrates OTDR detection function in any local downlink of the plurality of local wavelength division optical link groups 220. The fourth detection optical signal can be sent through any local downlink integrated with the OTDR detection function.

[0131] S320, inputting a second detection electrical signal from the local optical module assembly 210.

[0132] In the embodiments of the present application, the fourth detection optical signal will generate a second echo signal on the main optical link 240 and the corresponding local downlink and remote downlink. The second detection electrical signal is obtained by the local optical module assembly 210 according to the second echo signal.

[0133] S330, obtaining an eighth failure indication signal according to the second detection electrical signal.

[0134] In the embodiments of the present application, the position of the transmission peak on the second detection electrical signal can be used to determine the position of the transmission failure, and the eighth failure indication signal can be obtained according to the second detection electrical signal; the eighth failure indication signal is used to indicate the position of the transmission failure on the main optical link 240.

[0135] In the embodiments of the present application, according to the different received alarm information, the detection device X can execute the above-mentioned first detection method, second detection method and third detection method, and output different failure indication signals to indicate the transmission failure of the corresponding optical link.​

[0136] The embodiment of the present application provides a detection device, a communication device, a detection method and a communication system, which are used for transmission fault detection of an optical transmission path. The optical transmission path comprises optical module assemblies, a multiplexer / demultiplexer, a plurality of local wavelength division optical link groups, a main optical link group and a plurality of remote wavelength division optical link groups which are coupled in sequence. The OTDR detection function is integrated in the optical module assembly. The detection device X is coupled with the optical module assembly. The detection precision of the OTDR detection function in the embodiment of the present application is greater than the filtering precision of the multiplexer / demultiplexer. The detection device can detect whether there is a filter leakage optical signal on different links coupled by the multiplexer / demultiplexer. According to the detection result, the specific position of the transmission fault is judged, and different fault indication signals are output to indicate the optical link where the transmission fault is located. In the embodiment of the present application, additional devices are not needed, and the detection of the transmission fault can be realized by using the conventional device for realizing optical transmission based on the multiplexer / demultiplexer, and the cross-link detection of different optical links coupled by the multiplexer / demultiplexer can be realized. The embodiment of the present application realizes the low-cost, high-precision and comprehensive detection of the transmission fault in the optical transmission path, and can be applied to the front transmission networking of wireless communication to realize the comprehensive detection of the optical transmission fault.

[0137] The embodiment of the present application also provides a computer readable storage medium, which comprises instructions. When the instructions are run on a processor, the processor executes the detection method (for example, the detection method described in the above Figure 11 、 Figure 12 、 Figure 13 and Figure 14 ).

[0138] The processor related to the embodiment of the present application can be a chip. For example, the processor can be a field programmable gate array (FPGA), can be an application specific integrated circuit (ASIC), can be a system on chip (SoC), can be a central processor unit (CPU), can be a network processor (NP), can be a digital signal processor (DSP), can be a microcontroller unit (MCU), can be a programmable logic device (PLD) or other integrated chip.

[0139] It should be understood that the size of the sequence number of the above processes does not mean the order of execution in various embodiments of the present application, and the execution order of the processes should be determined according to its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0140] Those skilled in the art can realize that the modules and algorithm steps of the examples described in combination with the embodiments disclosed herein can be realized in electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0141] Those skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the above-described system, device and module can refer to the corresponding process in the foregoing method embodiments, which will not be repeated here.

[0142] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of the modules is only a logical function division, and actual implementation can have another division manner, for example, a plurality of modules or components can be combined or integrated into another device, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the shown or discussed each other can be through some interface, indirect coupling or communication connection between devices or modules, which can be electrical, mechanical or other forms.

[0143] The modules described as separate components can or can not be physically separated, and the components shown as modules can or can not be physical modules, that is, they can be located in one device, or can be distributed to multiple devices. According to actual needs, part or all of the modules can be selected to achieve the purpose of the present embodiment.

[0144] In addition, each functional module in each embodiment of the present application can be integrated in one device, or each module can exist physically, or two or more modules can be integrated in one device.

[0145] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware or any combination thereof. When implemented by using a software program, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions can be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) manner. The computer readable storage medium can be any available medium that can be accessed by a computer or data storage device including one or more servers, data centers, etc. integrated with the medium. The available medium can be a magnetic medium (such as a floppy disk, a hard disk, a magnetic tape), an optical medium (such as a DVD), or a semiconductor medium (such as a solid state disk (SSD)), etc.

[0146] The above description is merely a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A detection device, characterized by The application relates to a detection device for detecting transmission failure of an optical transmission path; the optical transmission path comprises a local optical module assembly, a plurality of local wavelength division optical link groups, a local multiplexer / demultiplexer and a plurality of remote wavelength division optical link groups which are coupled in sequence; the plurality of local wavelength division optical link groups are coupled with a plurality of filtering ends of the local multiplexer / demultiplexer; a multiplexing end of the local multiplexer / demultiplexer is coupled with the plurality of remote wavelength division optical link groups; the local optical module assembly is integrated with an OTDR detection function; the detection precision of the OTDR detection function is greater than the filtering precision of the local multiplexer / demultiplexer; the detection device is used for: in response to first alarm information, outputting different fault indication signals according to whether the local optical module assembly detects a filtering leakage optical signal from the plurality of local wavelength division optical link groups based on the OTDR detection function; the first alarm information is used for indicating that a first local wavelength division optical link group in the plurality of local wavelength division optical link groups cannot interact with a service optical signal; the fault indication signals are used for indicating that the transmission failure occurs in the first local wavelength division optical link group or in a first remote wavelength division optical link group corresponding to the first local wavelength division optical link group.

2. The detection device of claim 1, wherein, The first local wavelength division optical link group comprises a first local uplink and a first local downlink; the first remote wavelength division optical link group comprises a first remote uplink and a first remote downlink; the local optical module assembly is integrated with the OTDR detection function for any local downlink in the plurality of local wavelength division optical link groups; the outputting of different fault indication signals according to whether the local optical module assembly detects a filtering leakage optical signal from the plurality of local wavelength division optical link groups based on the OTDR detection function comprises: when a first electrical signal is not received from the local optical module assembly and a first leakage electrical signal is received within a first time, outputting a first fault indication signal; the first fault indication signal is used for indicating that the transmission failure occurs in the first local uplink; the first electrical signal is used for indicating that, within the first time, the local optical module assembly inputs a first optical signal from the first remote uplink and the first local uplink; the first leakage electrical signal is used for indicating that, within the first time, the local optical module assembly detects the filtering leakage optical signal of the first optical signal from the any local downlink based on the OTDR detection function; or, when a first electrical signal and a first leakage electrical signal are not received from the local optical module assembly within a first time, outputting a second fault indication signal; the second fault indication signal is used for indicating that the transmission failure occurs in the first remote uplink.

3. The detection device of claim 1, wherein, The first local WDM link group comprises a first local uplink and a first local downlink; the first remote WDM link group comprises a first remote uplink and a first remote downlink; the local optical module assembly integrates the OTDR detection function for a second local downlink of a second local WDM link group; and the method comprises: controlling the local optical module assembly to output a first detection optical signal to the first local downlink at a second time after a first time; when a first electrical signal is received from the local optical module assembly at the first time and a second leakage electrical signal is received from the local optical module assembly at the second time, outputting a third fault indication signal; the third fault indication signal is used to indicate that the transmission fault occurs in the first remote downlink; the first electrical signal is used to indicate that the local optical module assembly inputs a first optical signal from the first remote uplink and the first local uplink at the first time; and the second leakage electrical signal is used to indicate that the local optical module assembly detects the filtered leakage optical signal of the first detection optical signal from the second local downlink based on the OTDR detection function at the second time; or, when a first electrical signal is received from the local optical module assembly at the first time and a second leakage electrical signal is not received from the local optical module assembly at the second time, outputting a fourth fault indication signal; the fourth fault indication signal is used to indicate that the transmission fault occurs in the first local downlink.

4. The detection device of claim 1, wherein, The first local WDM link group comprises a first local uplink and a first local downlink; the first remote WDM link group comprises a first remote uplink and a first remote downlink; the local optical module assembly integrates the OTDR detection function for the first local downlink; and the detection device is further used for: when a first electrical signal is received from the local optical module assembly at a first time, controlling the local optical module assembly to send a second detection optical signal to the first local downlink at a second time after the first time; the first electrical signal is used to indicate that the local optical module assembly inputs a first optical signal from the first remote uplink and the first local uplink at the first time; inputting a first detection electrical signal from the local optical module assembly; the first detection electrical signal is an electrical signal obtained by the local optical module assembly based on the OTDR detection function according to a first echo optical signal; the first echo optical signal is an echo optical signal of the second detection optical signal; outputting a fifth fault indication signal according to the first detection electrical signal; and the first detection electrical signal is an electrical signal obtained by the local optical module assembly based on the OTDR detection function according to a first echo optical signal; the first echo optical signal is an echo optical signal of the second detection optical signal. The fifth fault indication signal is used for indicating the occurrence position of the transmission fault on the first remote downlink, or is used for indicating the occurrence position of the transmission fault on the first local downlink.

5. The detection device of claim 1, wherein, The first local WDM link group comprises a first local uplink / downlink multiplexing link; the first remote WDM link group comprises a first remote uplink / downlink multiplexing link; the local optical module assembly integrates the OTDR detection function for a second local uplink / downlink multiplexing link of a second local WDM link group; and the detection device is further configured to: output different fault indication signals according to whether the local optical module assembly detects a filtered leakage optical signal from the plurality of local WDM link groups based on the OTDR detection function, comprising: controlling the local optical module assembly to send a third detection optical signal to the first local uplink / downlink multiplexing link; outputting a sixth fault indication signal when a third leakage electrical signal is received from the local optical module assembly; the sixth fault indication signal is used for indicating that the transmission fault occurs on the first remote uplink / downlink multiplexing link; and the third leakage electrical signal is used for indicating that the local optical module assembly detects the filtered leakage optical signal of the third detection optical signal from the second local uplink / downlink multiplexing link based on the OTDR detection function; or, outputting a seventh fault indication signal when no third leakage electrical signal is received from the local optical module assembly; the seventh fault indication signal is used for indicating that the transmission fault occurs on the first local uplink / downlink multiplexing link.

6. The detection device according to any one of claims 1 to 5, characterized in that The detection device is a communication device; and the detection device is further configured to: interact the service optical signal through the optical transmission path; stop interacting the service optical signal in response to the first alarm information.

7. The detection device according to any one of claims 1 to 5, characterized in that The detection device is an optical monitoring device; the local optical module assembly is further coupled with a communication device; the communication device interacts the service optical signal through the optical transmission path; and the detection device is further configured to: output a first control signal to the communication device in response to the first alarm information; the first control signal is used for controlling the communication device to stop interacting the service optical signal.

8. The detection device according to any one of claims 1 to 5, characterized in that The optical transmission path further comprises a main optical link; a multiplexing end of the local multiplexer is coupled with the plurality of remote WDM link groups through the main optical link; the local optical module assembly integrates the OTDR detection function for any local downlink in the plurality of local WDM link groups; and the detection device is further configured to: control the local optical module assembly to send a fourth detection optical signal to the any local downlink in response to second alarm information; the second alarm information is used for indicating that the plurality of local WDM link groups and the plurality of remote WDM link groups are unable to interact the service optical signal; input a second detection electrical signal from the local optical module assembly; the second detection electrical signal is an electrical signal obtained by the local optical module assembly based on the OTDR detection function according to a second echo optical signal; and the second echo optical signal is an echo optical signal of the fourth detection optical signal; output an eighth fault indication signal according to the second detection electrical signal; and the eighth fault indication signal is used for indicating that the transmission fault occurs on the main optical link. The eighth fault indication signal is used for indicating the position of the transmission fault on the main optical link.

9. A communication device, characterized by The application is applied to a communication system, the communication system further comprises the detection device in any one of claims 1-8, and the communication device is used for interacting with service optical signals through an optical transmission path; the optical transmission path comprises a remote optical module assembly, a plurality of remote wavelength division optical link groups, a combining and splitting device and a plurality of local wavelength division optical link groups which are coupled in sequence; each of the remote wavelength division optical link groups comprises a remote uplink and a remote downlink; and the communication device is used for: In response to remote alarm information, the remote optical module assembly is controlled to send a first optical signal to the uplink of a certain remote wavelength division optical link group in the plurality of remote wavelength division optical link groups within a first time; and the remote alarm information is used for indicating that the certain remote wavelength division optical link group in the plurality of remote wavelength division optical link groups cannot interact with the service optical signals.

10. The communication device of claim 9, wherein, The communication device is further used for: In response to the remote alarm information, the interaction with the service optical signals is stopped.

11. A method of detection, characterized in that The application is used for detecting a transmission fault of an optical transmission path; the optical transmission path comprises a local optical module assembly, a plurality of local wavelength division optical link groups, a local combining and splitting device and a plurality of remote wavelength division optical link groups which are coupled in sequence; the plurality of local wavelength division optical link groups are coupled with a plurality of filtering ends of the local combining and splitting device; a combining end of the local combining and splitting device is coupled with the plurality of remote wavelength division optical link groups; the local optical module assembly is integrated with an OTDR detection function; the detection precision of the OTDR detection function is greater than the filtering precision of the local combining and splitting device; and the method comprises the following steps: In response to first alarm information, different fault indication signals are obtained according to whether the local optical module assembly detects a filtering leakage optical signal from the plurality of local wavelength division optical link groups based on the OTDR detection function; the first alarm information is used for indicating that a first local wavelength division optical link group in the plurality of local wavelength division optical link groups cannot interact with service optical signals; and the fault indication signal is used for indicating that the transmission fault occurs in the first local wavelength division optical link group or in a first remote wavelength division optical link group corresponding to the first local wavelength division optical link group.

12. The detection method of claim 11, wherein, The first local wavelength division optical link group comprises a first local uplink and a first local downlink; the first remote wavelength division optical link group comprises a first remote uplink and a first remote downlink; the local optical module assembly is integrated with the OTDR detection function for any local downlink in the plurality of local wavelength division optical link groups; and the step of obtaining different fault indication signals according to whether the local optical module assembly detects a filtering leakage optical signal from the plurality of local wavelength division optical link groups based on the OTDR detection function comprises the following steps: a first fault indication signal is obtained when no first electrical signal and no first leakage electrical signal are received from the local optical module assembly in a first time; the first fault indication signal is used to indicate that the transmission fault occurs in the first remote uplink; the first electrical signal is used to indicate that the local optical module assembly inputs a first optical signal from the first remote uplink and the first local uplink in the first time; the first leakage electrical signal is used to indicate that the local optical module assembly detects the filtered leakage optical signal of the first optical signal from any local downlink based on the OTDR detection function in the first time; or, a second fault indication signal is obtained when no first electrical signal and no first leakage electrical signal are received from the local optical module assembly in a first time; the second fault indication signal is used to indicate that the transmission fault occurs in the first local uplink.

13. The method of claim 11, wherein, the first local WDM link set includes a first local uplink and a first local downlink; the first remote WDM link set includes a first remote uplink and a first remote downlink; the local optical module assembly integrates the OTDR detection function for a second local downlink of a second local WDM link set; the different fault indication signals are obtained according to whether the local optical module assembly detects a filtered leakage optical signal from the plurality of local WDM link sets based on the OTDR detection function, including: in response to the first alarm information, a first detection optical signal is output by the local optical module assembly to the first local downlink in a second time after the first time; a third fault indication signal is obtained when a first electrical signal is received from the local optical module assembly in the first time and a second leakage electrical signal is received from the local optical module assembly in the second time; the third fault indication signal is used to indicate that the transmission fault occurs in the first remote downlink; the first electrical signal is used to indicate that the local optical module assembly inputs a first optical signal from the first remote uplink and the first local uplink in the first time; the second leakage electrical signal is used to indicate that the local optical module assembly detects the filtered leakage optical signal of the first detection optical signal from the second local downlink based on the OTDR detection function in the second time; or, a fourth fault indication signal is obtained when a first electrical signal is received from the local optical module assembly in the first time and no second leakage electrical signal is received from the local optical module assembly in the second time; the fourth fault indication signal is used to indicate that the transmission fault occurs in the first local downlink.

14. The method of claim 11, wherein, The first local WDM link group comprises a first local uplink and a first local downlink; the first remote WDM link group comprises a first remote uplink and a first remote downlink; the local optical module assembly integrates the OTDR detection function for the first local downlink; the detection method further comprises: In response to the first alarm information, when a first electrical signal is received from the local optical module assembly within a first time, a second time after the first time, the local optical module assembly is controlled to send a second detection optical signal to the first local downlink; the first electrical signal is used to indicate that, within the first time, the local optical module assembly inputs a first optical signal from the first remote uplink and the first local uplink; A first detection electrical signal is input from the local optical module assembly; the first detection electrical signal is an electrical signal obtained by the local optical module assembly based on the OTDR detection function according to a first echo optical signal; the first echo optical signal is an echo optical signal of the second detection optical signal; A fifth fault indication signal is obtained according to the first detection electrical signal; the fifth fault indication signal is used to indicate the occurrence position of the transmission fault on the first remote downlink, or, is used to indicate the occurrence position of the transmission fault on the first local downlink.

15. The method of claim 11, wherein, The first local WDM link group comprises a first local uplink and a first local downlink; the first remote WDM link group comprises a first remote uplink and a first remote downlink; the local optical module assembly integrates the OTDR detection function for the first local downlink; the detection method further comprises: The local optical module assembly is controlled to send a third detection optical signal to the first local uplink; When a third leakage electrical signal is received from the local optical module assembly, a sixth fault indication signal is output; the sixth fault indication signal is used to indicate that the transmission fault occurs on the first remote uplink; the third leakage electrical signal is used to indicate that the local optical module assembly detects the filter leakage optical signal of the third detection optical signal from the second local uplink based on the OTDR detection function; Or, When no third leakage electrical signal is received from the local optical module assembly, a seventh fault indication signal is output; the seventh fault indication signal is used to indicate that the transmission fault occurs on the first local uplink.

16. The assay method according to any one of claims 11 to 15, wherein, The method is executed based on a communication device; the method further comprises: In response to the first alarm information, the service optical signal is stopped from being interacted.

17. The assay method according to any one of claims 11 to 15, wherein, The method is executed based on an optical monitoring device; the method further comprises: In response to the first alarm information, a first control signal is output to a communication device, the first control signal being used to control the communication device to stop interacting the service optical signal. The method is executed based on a communication device; the method further comprises: In response to the first alarm information, the service optical signal is stopped from being interacted. The method is executed based on an optical monitoring device; the method further comprises: In response to the first alarm information, a first control signal is output to a communication device, the first control signal being used to control the communication device to stop interacting the service optical signal.

18. The assay of any one of claims 11-15, wherein, The optical transmission path further comprises a main optical link; a wave combining end of the local end multiplexer is coupled with the plurality of remote wave division optical link groups through the main optical link; the local end optical module component is integrated with the OTDR detection function for any local end downlink in the plurality of local end wave division optical link groups; the method further comprises: In response to second alarm information, the local end optical module component is controlled to send a fourth detection optical signal to the any local end downlink; the second alarm information is used to indicate that the plurality of local end wave division optical link groups and the plurality of remote wave division optical link groups cannot interact with the service optical signal; A second detection electrical signal is input from the local end optical module component; the second detection electrical signal is an electrical signal obtained by the local end optical module component based on the OTDR detection function according to a second echo optical signal; the second echo optical signal is an echo optical signal of the fourth detection optical signal; An eighth fault indication signal is obtained according to the second detection electrical signal; the eighth fault indication signal is used to indicate a position of the transmission fault on the main optical link.

19. A method of detection, characterized in that Based on a communication device, the communication device is applied to a communication system, the communication system further comprises the detection device as claimed in any one of claims 1-8; the communication device is used to interact with a service optical signal through an optical transmission path; the optical transmission path comprises remote optical module components, a plurality of remote wave division optical link groups, a multiplexer and a plurality of local end wave division optical link groups which are coupled in sequence; each of the plurality of local end wave division optical link groups comprises a local end uplink and a local end downlink; the method comprises: In response to remote alarm information, a first optical signal is sent by the remote optical module component to an uplink of a certain remote wave division optical link group in the plurality of remote wave division optical link groups within a first time; the remote alarm information is used to indicate that the certain remote wave division optical link group in the plurality of remote wave division optical link groups cannot interact with a service optical signal.

20. The method of claim 19, wherein, The method further comprises: In response to the remote alarm information, the interaction with the service optical signal is stopped.

21. A communication system, characterized by The detection device and an optical transmission path are included; the optical transmission path comprises a local end optical module component, a plurality of local end wave division optical link groups, a local end multiplexer, a plurality of remote wave division optical link groups and a remote optical module component which are coupled in sequence; the plurality of local end wave division optical link groups are coupled with a plurality of filtering ends of the local end multiplexer; a wave combining end of the local end multiplexer is coupled with the plurality of remote wave division optical link groups; the local end optical module component is integrated with an OTDR detection function; a detection accuracy of the OTDR detection function is greater than a filtering accuracy of the local end multiplexer; wherein: The optical transmission path is used to interact with a service optical signal; The detection device is configured to interact with a remote communication device a service optical signal, and output different fault indication signals according to whether the local optical module assembly detects a filtered leakage optical signal from the plurality of local wavelength division optical link groups based on the OTDR detection function in response to local alarm information; the local alarm information is used to indicate that a first local wavelength division optical link group in the plurality of local wavelength division optical link groups cannot interact with the service optical signal; and the fault indication signals are used to indicate that a transmission fault occurs in the first local wavelength division optical link group, or the transmission fault occurs in a first remote wavelength division optical link group corresponding to the first local wavelength division optical link group.

22. The communication system of claim 21, wherein, The first local wavelength division optical link group includes a first local uplink and a first local downlink; the first remote wavelength division optical link group includes a first remote uplink and a first remote downlink; the local optical module assembly integrates the OTDR detection function for any local downlink in the plurality of local wavelength division optical link groups; the communication system further includes a remote communication device and a remote optical module assembly; the remote communication device is coupled with the plurality of remote wavelength division optical link groups through the remote optical module assembly; wherein: The remote communication device is configured to control the remote optical module assembly to send a first optical signal to the first remote uplink within a first time in response to remote alarm information; the remote alarm information is used to indicate that the first remote wavelength division optical link group cannot interact with the service optical signal; The detection device is configured to output different fault indication signals in response to the local alarm information: When a first electrical signal is not received from the local optical module assembly and a first leakage electrical signal is received within the first time, a first fault indication signal is output; the first fault indication signal is used to indicate that the transmission fault occurs in the first remote uplink; the first electrical signal is used to indicate that the local optical module assembly inputs a first optical signal from the first remote uplink and the first local uplink; and the first leakage electrical signal is used to indicate that the local optical module assembly detects the filtered leakage optical signal of the first optical signal from the any local downlink based on the OTDR detection function; Or, When a first electrical signal and a first leakage electrical signal are not received from the local optical module assembly within the first time, a second fault indication signal is output; the second fault indication signal is used to indicate that the transmission fault occurs in the first local uplink.

23. The communication system of claim 21, wherein, The first local wavelength division optical link group includes a first local uplink and a first local downlink; the first remote wavelength division optical link group includes a first remote uplink and a first remote downlink; the local optical module assembly integrates the OTDR detection function for a second local downlink of a second local wavelength division optical link group; The remote communication device is configured to control the remote optical module assembly to send a first optical signal to the first remote uplink within a first time in response to remote alarm information; the remote alarm information is used to indicate that the first remote wavelength division optical link group cannot interact with the service optical signal; The detection device is used for: in response to the local alarm information, controlling the local optical module assembly to output a first detection optical signal to the first local downlink at a second time after a first time; when a first electrical signal is received from the local optical module assembly at the first time and a second leakage electrical signal is received from the local optical module assembly at the second time, outputting a third fault indication signal; the third fault indication signal is used for indicating that the transmission fault occurs in the first remote downlink; the first electrical signal is used for indicating that the local optical module assembly inputs a first optical signal from the first remote uplink and the first local uplink at the first time; the second leakage electrical signal is used for indicating that the local optical module assembly detects the filtered leakage optical signal of the first detection optical signal from the second local downlink based on the OTDR detection function at the second time; or, when a first electrical signal is received from the local optical module assembly at the first time and no second leakage electrical signal is received from the local optical module assembly at the second time, outputting a fourth fault indication signal; the fourth fault indication signal is used for indicating that the transmission fault occurs in the first local downlink.

24. The communication system of any of claims 21-23, wherein, The detection device is a local communication device; the detection device is further used for: in response to the local alarm information, stopping the communication device from interacting with the service optical signal.

25. The communication system of any of claims 21-23, wherein, The detection device is an optical monitoring device; the communication system further comprises a local communication device; the detection device is further used for: in response to the local alarm information, outputting a first control signal to the local communication device; the first control signal is used for controlling the communication device to stop interacting with the service optical signal.

26. A computer-readable storage medium, characterized in that, The computer readable storage medium comprises instructions; when the instructions run on the processor, the processor executes the method in any one of claims 11-18, or executes the method in claim 19 or 20.

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