Detection device, communication device, detection method, and communication system

Abstract

A detection device, a communication device, a detection method, and a communication system, which are applied to the technical field of optical path-based communication, and are used for performing transmission fault detection on an optical transmission path. The optical transmission path comprises a local-end optical module assembly, a plurality of local-end wavelength division optical link groups, a local-end multiplexer / demultiplexer, and a plurality of remote-end wavelength division optical link groups which are coupled in sequence. According to the present solution, on the basis that the testing precision of an OTDR testing function is greater than the filtering precision of the multiplexer / demultiplexer, the detection of transmission faults on different optical links to which the multiplexer / demultiplexer is coupled can be achieved. In this way, an additional detection device does not need to be provided, and cross-link comprehensive testing of the different optical links to which the multiplexer / demultiplexer is coupled can be achieved by using a conventional device for achieving optical transmission on the basis of the multiplexer / demultiplexer. In this aspect, transmission faults of the optical transmission path can be comprehensively detected at low costs and with high precision, which can be suitable for fronthaul networking of wireless communication or optical communication networking.

Description

Detection device, communication device, detection method and communication system

[0001] This application claims priority to the Chinese patent application filed with the State Intellectual Property Office on September 28, 2023, with application number 202311283980.6 and application name “A detection device, communication device, detection method and communication system”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] 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 Art

[0003] In the field of communications technology, two communication devices can interact with each other through an optical transmission path. The optical transmission path includes multiple local optical splitter links, a main optical link, and multiple remote optical splitter links. The local communication device sends multiple, different or identical, service optical signals to the main optical link via the multiple local optical splitter links. The main optical link then transmits the multiple service optical signals to the multiple remote optical splitter links. The remote communication device receives the service optical signals sent by the local communication device from the multiple remote optical splitter links. Alternatively, the remote communication device can send multiple service optical signals to the local communication device via multiple remote optical splitter links, the main optical link, and multiple local optical splitter links. In actual applications, the required length of the optical transmission path varies depending on the distance between the two communication devices. When a transmission fault occurs on the transmission path, it is often difficult to determine the location of the fault. This greatly complicates inspection and repair of the optical transmission path fault, significantly impacting service interaction between the communicating parties.

[0004] One method for detecting transmission faults in optical transmission paths involves using an optical time domain reflectometer (OTDR) to detect the optical link and locate the fault. However, this method only detects faults on the trunk link. If the optical transmission path includes a trunk link and multiple slave links, cross-link fault detection across the different slave links is not possible.

[0005] Summary of the Invention

[0006] 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 locations of an optical transmission path.

[0007] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0008] In a first aspect, a detection device is provided for detecting transmission faults in an optical transmission path. The optical transmission path includes a local optical module assembly, multiple local wavelength division optical link groups, a local wavelength splitter, and multiple remote wavelength division optical link groups coupled in sequence; the multiple local wavelength division optical link groups are coupled to multiple filter ends of the local wavelength splitter; the combining end of the local wavelength splitter is coupled to multiple remote wavelength division optical link groups; the local optical module assembly is integrated with an OTDR detection function; the detection accuracy of the OTDR detection function is greater than the filtering accuracy of the local wavelength splitter. The detection device is used to: in response to a first alarm message, output different fault indication signals according to whether the local optical module assembly detects filtered leakage optical signals from multiple local wavelength division optical link groups based on the OTDR detection function; the first alarm message is used to indicate that a first local wavelength division optical link group among the multiple local wavelength division optical link groups cannot exchange service optical signals; the fault indication signal is used to indicate that a transmission fault occurs in the first local wavelength division optical link group, or that a transmission fault occurs in the first remote wavelength division optical link group corresponding to the first local wavelength division optical link group.

[0009] In an embodiment of the present application, based on the characteristic that the detection accuracy of the OTDR detection function is greater than the filtering accuracy of the combiner / splitter, the detection device can detect whether there is a filtered leakage optical signal on different links coupled by the combiner / splitter, and judge the specific location of the transmission fault based on the detection result, and output different fault indication signals to indicate the optical link where the transmission fault is located. Through the above method, there is no need to set up additional devices, and conventional devices based on combiners / splitters to realize optical transmission can be used to realize the detection of transmission faults, and cross-link detection of different optical links coupled to the combiner / splitter can be realized. This solution realizes low-cost, high-precision and comprehensive detection of transmission faults in optical transmission paths, and can be applied to the fronthaul networking of wireless communications to realize comprehensive optical transmission fault detection.

[0010] In one possible embodiment, 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; and the local optical module component integrates an OTDR detection function for any local downlink in multiple local wavelength division optical link groups. At this time, 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 multiple local wavelength division optical link groups cannot exchange service optical signals), it is necessary not only to determine whether the transmission fault occurs at the local end or the remote end, but also to determine whether the transmission fault occurs at the uplink or the downlink. Depending on the actual situation, the above-mentioned output of different fault indication signals based on whether the local optical module component detects filtered leakage optical signals from multiple local wavelength division optical link groups based on the OTDR detection function may include the following scenarios:

[0011] In some examples, the local optical module assembly integrates an OTDR detection function for any local downlink in a plurality of local wavelength division optical link groups. When the first electrical signal is not received from the local optical module assembly within the first time and a first leakage electrical signal is received, a first fault indication signal is output; the first fault indication signal is used to indicate that a 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 a filtered leakage optical signal of the first optical signal from any local downlink based on the OTDR detection function. In an embodiment of the present application, if the first electrical signal is not received within the first time, it proves that there is a transmission fault in the first local uplink and the first remote uplink. 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.

[0012] In some examples, the local optical module assembly integrates an OTDR detection function for any local downlink in a plurality of local wavelength division optical link groups. 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 used to indicate that a transmission fault has occurred in the first remote uplink. In an embodiment of the present application, if the first electrical signal is not received within the first time, it is proved that there is a transmission fault in the first local uplink and the first remote uplink. If the first leakage electrical signal is not received within the first time, it is proved that the first remote uplink has failed to transmit the first optical signal, and then the transmission fault has occurred in the first local uplink.

[0013] In some examples, the local optical module assembly integrates an OTDR detection function for the second local downlink of the second local wavelength division optical link group. Within 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 within the first time, and a second leakage electrical signal is received from the local optical module assembly within the second time, 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: 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 second leakage electrical signal is used to indicate that: within 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 an embodiment of the present application, if the first electrical signal is received within the first time, it proves that the first local uplink and the first remote uplink transmit the first optical signal normally, then the transmission fault exists between the first local downlink and the first remote downlink. If the second leakage electrical signal is received within the second time, it proves that the first local downlink transmits the first detection optical signal normally, and the transmission fault occurs in the first local downlink.

[0014] In some examples, the local optical module assembly integrates 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 within a first time, and a second leakage electrical signal is not received from the local optical module assembly within a second time, 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. In an embodiment of the present application, if the first electrical signal is received within the first time, it proves that the first local uplink and the first remote uplink have normally transmitted the first optical signal, then the transmission fault exists between the first local downlink and the first remote downlink. If the second leakage electrical signal is not received within the second time, it proves that the first local downlink has failed to transmit the first detection optical signal, then the transmission fault occurs in the first local downlink.

[0015] In some examples, the local optical module assembly integrates an OTDR detection function for the first local downlink. Upon receiving a first electrical signal from the local optical module assembly within a first timeframe, the local optical module assembly is controlled to transmit a second detection optical signal to the first local downlink within a second timeframe after the first timeframe. The first electrical signal indicates that the local optical module assembly received the first optical signal from the first remote uplink and the first local uplink within the first timeframe. The 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 first echo optical signal using the OTDR detection function. The first echo optical signal is an echo optical signal of the second detection optical signal. A fifth fault indication signal is output based on the first detection electrical signal. The fifth fault indication signal indicates the location of a transmission fault on the first remote downlink, or the location of a transmission fault on the first local downlink. In this embodiment of the present application, when the first electrical signal is received within the first timeframe, it indicates that the first local uplink and the first remote uplink are transmitting the first optical signal normally, and therefore the transmission fault exists between the first local downlink and the first remote downlink. Since the OTDR detection function is integrated into the first local downlink, the location of the transmission fault on the first local downlink or the first remote downlink can be directly determined by the OTDR detection function.

[0016] In some possible implementations, 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 the first local uplink and downlink multiplexing link; the first remote wavelength division optical link group includes the first remote uplink and downlink multiplexing link. In this application scenario, it is necessary to detect and confirm whether the transmission fault occurs at the local end or the remote end. Depending on the actual situation, the above-mentioned output of different fault indication signals based on whether the local optical module component detects filtered leakage optical signals from multiple local wavelength division optical link groups based on the OTDR detection function may include the following situations:

[0017] In some examples, 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; the local optical module component integrates an OTDR detection function for the second local uplink and downlink multiplexing link of the second local wavelength division optical link group. At this time, the local optical module component is controlled to send a third detection optical signal to the first local uplink and downlink multiplexing link. When the third leakage electrical signal is received from the local optical module component, a sixth fault indication signal is output; the sixth fault indication signal is used to indicate that a transmission fault occurs in the first remote uplink and downlink multiplexing link; the third leakage electrical signal is used to indicate: the local optical module component detects a filtered leakage optical signal of the third detection optical signal from the second local uplink and downlink multiplexing link based on the OTDR detection function. In an embodiment of the present application, when the first alarm information appears, a third detection optical signal can be sent to the first local uplink and downlink multiplexing link. If the OTDR detection function integrated into the second local uplink and downlink multiplexing link can detect the filtered leakage optical signal of the third detection optical signal from the second local uplink and downlink multiplexing link, it proves that the first local uplink and 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 and downlink multiplexing link.

[0018] In some examples, 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; the local optical module component integrates an OTDR detection function for the second local uplink and downlink multiplexing link of the second local wavelength division optical link group. At this time, the local optical module component is controlled to send a third detection optical signal to the first local uplink and downlink multiplexing link. When the third leakage electrical signal is not received from the local optical module component, a seventh fault indication signal is output; the seventh fault indication signal is used to indicate that a transmission fault occurs in the first local uplink and downlink multiplexing link. In an embodiment of the present application, when the filtered leakage optical signal of the third detection optical signal is not detected from the second local uplink and downlink multiplexing link, it proves that the first local uplink and downlink multiplexing link cannot transmit the third detection optical signal normally, then it can be confirmed that the transmission fault occurs in the first local uplink and downlink multiplexing link.

[0019] In one possible implementation, the detection device is a communications device. The detection device is further configured to: exchange service optical signals via an optical transmission path. In response to the first alarm information, stop exchanging service optical signals. In this embodiment of the present application, a local communications device can be used as the detection device. In this case, the detection device can also stop exchanging service optical signals to reduce detection of filtered leakage optical signals, thereby improving the accuracy of transmission fault detection.

[0020] In one possible embodiment, the detection device is an optical monitoring device. The optical module assembly at this end is also coupled to the communication device. The communication device interacts with the service optical signal through the optical transmission path. The detection device is also used to: output a first control signal to the communication device in response to the first alarm information, and the first control signal is used to control the communication device to stop interacting with the service optical signal. In an embodiment of the present application, when the detection device is an independent device other than the communication device at this end, the communication device at this end can stop interacting with the service optical signal in response to the first alarm information, or the detection device can send a first control signal to the communication device at this end to control the communication device to stop interacting with the service optical signal, thereby improving the transmission accuracy of detecting transmission failures.

[0021] In one possible embodiment, the optical transmission path also includes a main optical link. The combining end of the local combiner / splitter is coupled to multiple 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 of the multiple local wavelength division optical link groups. The detection device is also used to: in response to the second alarm information, control the local optical module assembly to send a fourth detection optical signal to any local downlink; the second alarm information is used to indicate that multiple local wavelength division optical link groups and multiple remote wavelength division optical link groups are unable to exchange service optical signals. A 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 second echo optical signal based on the OTDR detection function; the second echo optical signal is an echo optical signal of the fourth detection optical signal. An eighth fault indication signal is output based on the second detection electrical signal; the eighth fault indication signal is used to indicate the location where the transmission fault occurs on the main optical link. In an embodiment of the present application, when all wavelength division optical link groups are unable to exchange service optical signals, it means that a transmission fault has occurred in the main optical link. At this point, the transmission fault of the main optical link can be directly detected and located based on the integrated OTDR detection function.

[0022] In a second aspect, an embodiment of the present application further provides a communication device for interacting 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 combiner / splitter, and a plurality of second wavelength division optical link groups coupled in sequence. Each first wavelength division optical link group includes a first uplink and a first downlink. The communication device is used to: in response to an alarm message, control the first optical module assembly to send a first optical signal to an uplink of a certain first wavelength division optical link group among the plurality of first wavelength division optical link groups within a first time; the alarm message is used to indicate that a certain wavelength division link group among the plurality of first wavelength division optical link groups cannot interact with service optical signals.

[0023] Exemplarily, the first optical module assembly is the remote optical module assembly in the first aspect, and the multiple first wavelength division optical link groups are the multiple remote wavelength division optical link groups in the first aspect. The aforementioned first wavelength division optical link group is the first remote wavelength division optical link group that cannot exchange service optical signals among the multiple wavelength division optical link groups in the first aspect. In an embodiment of the present application, when the first remote wavelength division optical link group among the multiple remote wavelength division optical link groups cannot exchange service optical signals, within the first time after receiving the remote alarm information, the communication device will control the remote optical module assembly to send a first optical signal to the first remote uplink of the first remote wavelength division optical link group in the first aspect. The first optical signal is used to assist the detection device in the first aspect in detecting the location of the transmission fault.

[0024] In one possible implementation, the communication device is further configured to: in response to the alarm information, stop the interactive service optical signal. In the embodiment of the present application, when the detection device of the first aspect needs to detect a transmission fault, both communicating parties stop the interactive service optical signal, which can improve the detection accuracy of the transmission fault.

[0025] In a third aspect, an embodiment of the present application also provides a detection method for detecting transmission failures in an optical transmission path. The optical transmission path includes a local optical module assembly, multiple local wavelength division optical link groups, a local wavelength splitter, and multiple remote wavelength division optical link groups coupled in sequence; the multiple local wavelength division optical link groups are coupled with multiple filter ends of the local wavelength splitter; the combining end of the local wavelength splitter is coupled with multiple remote wavelength division optical link groups; the local optical module assembly is integrated with an OTDR detection function; the detection accuracy of the OTDR detection function is greater than the filtering accuracy of the local wavelength splitter. The method includes: in response to a first alarm message, obtaining different fault indication signals according to whether the local optical module assembly detects filtered leakage optical signals from multiple local wavelength division optical link groups based on the OTDR detection function. The first alarm message is used to indicate that the first local wavelength division optical link group among the multiple local wavelength division optical link groups cannot exchange service optical signals; the fault indication signal is used to indicate that the transmission fault occurs in the first local wavelength division optical link group, or that the transmission fault occurs in the first remote wavelength division optical link group corresponding to the first local wavelength division optical link group.

[0026] In one possible embodiment, 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; and the local optical module component integrates an OTDR detection function for any local downlink in multiple local wavelength division optical link groups. At this time, 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 multiple local wavelength division optical link groups cannot exchange service optical signals), it is necessary not only to determine whether the transmission fault occurs at the local end or the remote end, but also to determine whether the transmission fault occurs at the uplink or the downlink. Depending on the actual situation, the above-mentioned output of different fault indication signals based on whether the local optical module component detects filtered leakage optical signals from multiple local wavelength division optical link groups based on the OTDR detection function may include the following scenarios:

[0027] In some examples, a local optical module assembly integrates an OTDR detection function for any local downlink in a plurality of local wavelength division optical link groups. When a first electrical signal is not received from the local optical module assembly within a first period of time and a first leakage electrical signal is received, a first fault indication signal is output; the first fault indication signal is used to indicate that a transmission fault has occurred in the first local uplink; the first electrical signal is used to indicate that, within the first period of time, the local optical module assembly inputted the first optical signal from the first remote uplink and the first local uplink; and the first leakage electrical signal is used to indicate that, within the first period of time, the local optical module assembly detected a filtered leakage optical signal of the first optical signal from any local downlink based on the OTDR detection function.

[0028] In some examples, the local optical module assembly integrates an OTDR detection function for any local downlink in a plurality of local wavelength division optical link groups. 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 used to indicate that a transmission fault has occurred in the first remote uplink. In an embodiment of the present application, if the first electrical signal is not received within the first time, it is proved that there is a transmission fault in the first local uplink and the first remote uplink. If the first leakage electrical signal is not received within the first time, it is proved that the first remote uplink has failed to transmit the first optical signal, and then the transmission fault has occurred in the first local uplink.

[0029] In some examples, the local optical module assembly integrates an OTDR detection function for the second local downlink of the second local wavelength division optical link group. Within 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 within the first time, and a second leakage electrical signal is received from the local optical module assembly within the second time, 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: 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 second leakage electrical signal is used to indicate: within 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.

[0030] In some examples, the local optical module assembly integrates an OTDR detection function for a second local downlink of a second local wavelength division optical link group. When a first electrical signal is received from the local optical module assembly within a first period of time and a second leakage electrical signal is not received from the local optical module assembly within a second period of time, a fourth fault indication signal is output; the fourth fault indication signal is used to indicate that a transmission fault has occurred in the first local downlink.

[0031] In some examples, the local optical module assembly integrates an OTDR detection function for the first local downlink. When a first electrical signal is received from the local optical module assembly within a first time, the local optical module assembly is controlled to send a second detection optical signal to the first local downlink within a second time after the first time. 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 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 first echo optical signal based on the OTDR detection function. The first echo optical signal is an echo optical signal of the second detection optical signal. A fifth fault indication signal is output based on the first detection electrical signal. The fifth fault indication signal is used to indicate the location where the transmission fault occurs on the first remote downlink, or to indicate the location where the transmission fault occurs on the first local downlink.

[0032] In some possible implementations, 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 the first local uplink and downlink multiplexing link; the first remote wavelength division optical link group includes the first remote uplink and downlink multiplexing link. In this application scenario, it is necessary to detect and confirm whether the transmission fault occurs at the local end or the remote end. Depending on the actual situation, the above-mentioned output of different fault indication signals based on whether the local optical module component detects filtered leakage optical signals from multiple local wavelength division optical link groups based on the OTDR detection function may include the following situations:

[0033] In some examples, 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; and the local optical module assembly integrates an OTDR detection function for the second local uplink and downlink multiplexing link of the second local wavelength division optical 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 the 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 a transmission fault has occurred in the first remote uplink and downlink multiplexing link; the third leakage electrical signal is used to indicate that the local optical module assembly has detected a filtered leakage optical signal of the third detection optical signal from the second local uplink and downlink multiplexing link based on the OTDR detection function.

[0034] In some examples, a first local wavelength division optical link group includes a first local uplink and downlink multiplexing link; a first remote wavelength division optical link group includes a first remote uplink and downlink multiplexing link; and a local optical module assembly integrates an OTDR detection function for a second local uplink and downlink multiplexing link of a second local wavelength division optical link group. In this case, the local optical module assembly is controlled to transmit a third detection optical signal to the first local uplink and downlink multiplexing link. When the third leakage electrical signal is not received from the local optical module assembly, a seventh fault indication signal is output; the seventh fault indication signal is used to indicate that a transmission fault has occurred in the first local uplink and downlink multiplexing link.

[0035] In a possible implementation, the method is executed based on a communication device; the method further includes: stopping the interactive service optical signal in response to the first alarm information.

[0036] In a possible implementation, the method is performed based on an optical monitoring device; the method further includes: in response to the first alarm information, outputting a first control signal to the communication device, the first control signal being used to control the communication device to stop the interactive service optical signal.

[0037] In one possible embodiment, the optical transmission path also includes a main optical link; the combining end of the local combiner / splitter is coupled to multiple 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 of the multiple local wavelength division optical link groups. The method also includes: in response to the second alarm information, controlling the local optical module assembly to send a fourth detection optical signal to any local downlink; the second alarm information is used to indicate that multiple local wavelength division optical link groups and multiple remote wavelength division optical link groups are unable to exchange service optical signals. A 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 second echo optical signal based on the OTDR detection function; the second echo optical signal is an echo optical signal of the fourth detection optical signal. An eighth fault indication signal is obtained based on the second detection electrical signal; the eighth fault indication signal is used to indicate the location where the transmission fault occurs on the main optical link.

[0038] In a fourth aspect, an embodiment of the present application also provides a detection method based on a communication device. The communication device is used to interact with service optical signals through an optical transmission path. The optical transmission path includes a first optical module assembly, multiple first wavelength division optical link groups, a combiner / splitter, and multiple second wavelength division optical link groups coupled in sequence. Each local wavelength division optical link group includes a local uplink and a local downlink. The method includes: in response to an alarm message, within a first time, controlling the first optical module assembly to send a first optical signal to an uplink of a first wavelength division optical link group among the multiple first wavelength division optical link groups; the alarm message is used to indicate that a certain wavelength division link group among the multiple first wavelength division optical link groups cannot interact with service optical signals.

[0039] In a possible implementation manner, the method further includes: stopping the interactive service optical signal in response to the alarm information.

[0040] In a fifth aspect, an embodiment of the present application further provides a communication system, which includes a detection device and an optical transmission path. The optical transmission path includes a local optical module assembly, multiple local wavelength division optical link groups, a local combiner / demultiplexer, multiple remote wavelength division optical link groups, and a remote optical module assembly coupled in sequence. The multiple local wavelength division optical link groups are coupled to multiple filter ends of the local combiner / demultiplexer. The combining end of the local combiner / demultiplexer is coupled to multiple remote wavelength division optical link groups. The local optical module assembly is integrated with an OTDR detection function; the detection accuracy of the OTDR detection function is greater than the filtering accuracy of the local combiner / demultiplexer. Wherein: the optical transmission path is used to: exchange service optical signals. The detection device is used to: exchange service optical signals with remote communication equipment. In response to the local alarm information, different fault indication signals are output according to whether the local optical module assembly detects filtered leakage optical signals from multiple local wavelength division optical link groups based on the OTDR detection function. The local alarm information is used to indicate that the first local wavelength division optical link group among the multiple local wavelength division optical link groups is unable to exchange service optical signals. The fault indication signal is used to indicate that a transmission fault occurs in the first local wavelength division optical link group, or that a transmission fault occurs in the first remote wavelength division optical link group corresponding to the first local wavelength division optical link group.

[0041] In one possible embodiment, a first local wavelength division optical link group includes a first local uplink and a first local downlink. A first remote wavelength division optical link group includes a first remote uplink and a first remote downlink. The local optical module assembly integrates an OTDR detection function for any local downlink in the multiple local wavelength division optical link groups. The communication system also includes a remote communication device and a remote optical module. The remote communication device is coupled to the multiple remote wavelength division optical link groups via the remote optical module. The remote communication device is configured to: in response to 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 used to indicate that the first remote wavelength division optical link group cannot exchange service optical signals. The detection device is configured to: in response to the local alarm information, output different fault indication signals: when the first electrical signal is not received from the local optical module assembly within the first time and a first leakage electrical signal is received, output a first fault indication signal. The first fault indication signal is used to indicate that a transmission fault has occurred in the first remote uplink. The first electrical signal indicates that the local optical module assembly receives the first optical signal from the first remote uplink and the first local uplink. The first leakage electrical signal indicates 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. Alternatively, when neither the first electrical signal nor the first leakage electrical signal is received from the local optical module assembly within a first period of time, a second fault indication signal is output. The second fault indication signal indicates that a transmission fault has occurred on the first local uplink.

[0042] In one possible embodiment, 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 an OTDR detection function for the second local downlink of the second local wavelength division optical link group. Wherein: the remote communication device is used to: in response to the 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 used to indicate that the first remote wavelength division optical link group cannot exchange business optical signals. The detection device is used to: in response to the local alarm information, control the local optical module assembly to output a first detection optical signal to the first local downlink within a second time after the first time. When the first electrical signal is received from the local optical module assembly within the first time, and the second leakage electrical signal is received from the local optical module assembly within the second time, a third fault indication signal is output. The third fault indication signal is used to indicate that a transmission fault has occurred in the first remote downlink. The first electrical signal is used to indicate that, within a first time period, 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, within a second time period, 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. Alternatively, a fourth fault indication signal is output when the first electrical signal is received from the local optical module assembly within the first time period and the second leakage electrical signal is not received from the local optical module assembly within the second time period. The fourth fault indication signal is used to indicate that a transmission fault has occurred in the first local downlink.

[0043] In a possible implementation, the detection device is a local communication device; the detection device is further configured to: in response to local alarm information, stop exchanging service optical signals with the optical transmission path.

[0044] In one possible embodiment, the detection device is an optical monitoring device. The communication system also 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; the first control signal is configured to control the communication device to stop transmitting the interactive service optical signal.

[0045] In a sixth aspect, embodiments of the present application further provide a computer-readable storage medium comprising instructions. When the instructions are executed on a processor, the processor executes the method described in the third aspect, or the method described in the fourth aspect.

[0046] Regarding the technical principles and beneficial effects of the second, third, fourth, fifth and sixth aspects, please refer to the relevant description of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] FIG1 is a schematic diagram of a structure for detecting transmission faults on a single link based on an OTDR;

[0048] FIG2 is a schematic diagram of a structure for performing transmission fault detection on multiple links based on OTDR;

[0049] FIG3 is a structural diagram 1 of a communication system provided in an embodiment of the present application;

[0050] FIG4 is a second structural diagram of another communication system provided in an embodiment of the present application;

[0051] FIG5 is a structural diagram of a local-end multiplexer / demultiplexer provided in an embodiment of the present application;

[0052] FIG6 is a third structural diagram of another communication system provided in an embodiment of the present application;

[0053] FIG7 is a fourth structural diagram of another communication system provided in an embodiment of the present application;

[0054] FIG8 is a schematic diagram of an OTDR-based detection electrical signal according to an embodiment of the present application;

[0055] FIG9 is a fifth structural diagram of another communication system provided in an embodiment of the present application;

[0056] FIG10 is a sixth structural diagram of another communication system provided in an embodiment of the present application;

[0057] FIG11 is a flow chart of a first detection method according to an embodiment of the present application;

[0058] FIG12 is a second flow chart of another first detection method provided in an embodiment of the present application;

[0059] FIG13 is a schematic diagram of a flow chart of a second detection method provided in an embodiment of the present application;

[0060] FIG14 is a flow chart of a third detection method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0061] It should be noted that the terms "first", "second", etc. involved in the embodiments of the present application are only used to distinguish features of the same type and cannot be understood as indicating relative importance, quantity, order, etc.

[0062] The terms "exemplary" or "for example" in the embodiments of this application are used to indicate examples, illustrations, or descriptions. Any embodiment or design described in this application as "exemplary" or "for example" should not be construed as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0063] The terms "coupling" and "connection" involved in the embodiments of this application should be understood in a broad sense. For example, they may 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.

[0064] An optical time-domain reflectometer (OTDR) is an optoelectronic integrated instrument that detects backscattered echo signals generated by Rayleigh scattering and Fresnel reflection when optical signals are transmitted in optical fibers. By detecting the echo signals, the location of optical fiber transmission faults can be determined.

[0065] As shown in Figure 1, this is a transmission fault detection method of OTDR. The network monitor N monitors the transmission status of the optical fiber through a wavelength division multiplexer (WDM). When a transmission fault in the optical fiber is detected, an alarm message is fed back to the control unit K. After receiving the alarm message, the control unit K controls the transmitting module of the OTDR to transmit the detection optical signal through the WDM, and the receiving module of the OTDR receives the echo optical signal of the detection optical signal from the WDM. By analyzing the echo optical signal, the location of the transmission fault on the optical fiber can be determined. However, this method can only be applied to the detection of a coupled trunk link of the optical transmission path. If there are multiple links in the optical transmission path, the OTDR cannot perform cross-link detection on other uncoupled links.

[0066] When the optical fiber transmitting the optical signal includes multiple different links, additional equipment is required to assist in multi-link detection. As shown in Figure 2, the central office device J is coupled to multiple branch optical fibers via the trunk optical fiber and splitter F1, and is coupled to multiple terminal devices Z via multiple branch optical fibers. When the OTDR needs to detect transmission faults on multiple different branch optical fibers, it can detect the optical splitting links connected to different optical network units (ONUs) based on the time delay splitter F2 and the optical reflector H. This solution couples the OTDR with multiple links. The time delay splitter delays the optical signals on the different optical splitting links, and the OTDR receives the echo optical signals from the different optical splitting links separately to identify the different optical splitting links. However, this solution still requires the OTDR to be coupled to different links. Furthermore, the time delay splitter F and multiple optical reflectors H are also required. This approach complicates the communication system layout and increases costs. It is not applicable to scenarios without relevant hardware configuration, nor to scenarios where the delay splitter F2 and the optical reflector H cannot be configured.

[0067] 3 , 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 performs service communication interaction with the remote communication device 3000 via the optical transmission path 2000.

[0068] To detect transmission faults in the optical transmission path 2000 of the communication system 10000, as shown in FIG4 , the communication system 10000 further includes a detection device X. The detection device X is used to detect transmission faults in the optical transmission path 2000. The optical transmission path 2000 includes a local optical module assembly 210, multiple local wavelength division optical link groups 220, a local wavelength combiner / demultiplexer 230, a main optical link 240, a remote wavelength combiner / demultiplexer 250, multiple remote wavelength division optical link groups 260, and a remote optical module assembly 270, which are sequentially coupled. The detection device X is coupled to the local optical module assembly 210. The remote communication device 3000 is coupled to the remote optical module assembly 270. The multiple local wavelength division optical link groups 220 are coupled to the multiple filter ports of the local wavelength combiner / demultiplexer 230. The multiplexing port of the local wavelength combiner / demultiplexer 230 is coupled to the multiple remote wavelength division optical link groups 260. The local optical module assembly 210 is integrated with an OTDR detection function. The detection accuracy of the OTDR detection function is greater than the filtering accuracy of the local combiner / demultiplexer. The detection device X is used to:

[0069] In response to the first alarm information, different fault indication signals are output according to whether the local optical module component 210 detects filtered leakage optical signals from multiple local wavelength division optical link groups 220 based on the OTDR detection function; the first alarm information is used to indicate that the first local wavelength division optical link group 221 among the multiple local wavelength division optical link groups 220 cannot interact with business optical signals; the fault indication signal is used to indicate that a transmission fault occurs in the first local wavelength division optical link group 221, or a transmission fault occurs in the first remote wavelength division optical link group 261 corresponding to the first local wavelength division optical link group 221.

[0070] For example, as shown in FIG5 , it is a schematic diagram of the structural principle of the combiner / splitter. A plurality of dielectric film filters J1 and optical fiber connectors J2 are integrated inside the combiner / splitter. The first ends of the plurality of dielectric film filters serve as the filtering ends of the combiner / splitter, and the second ends of the plurality of dielectric film filters J1 are coupled to the optical fiber connectors J2 respectively. The optical fiber connectors J2 are used to combine the optical signals of different wavelengths received by each dielectric film filter. The first end of one of the plurality of dielectric film filters J1 is also coupled to the main optical link 240 as the combining end of the combiner / splitter, and is used to exchange optical signals with the main optical link 240. Taking the combiner / splitter as the local end combiner / splitter 230 as an example, a plurality of local end wavelength division optical link groups 220 are coupled to the first ends (i.e., filtering ends) of the plurality of dielectric film filters J1. The first end of the dielectric film filter J1 is used to filter through the optical signals of the corresponding wavelengths, and the local end wavelength division optical link 220 coupled to the first end of a certain dielectric film filter J1 transmits the optical signals of the corresponding wavelengths. The second end of the dielectric film filter J1 combines optical signals of different wavelengths through the optical fiber connector J2 and sends them from the combining end to the main optical link 240, or receives optical signals of different wavelengths from the main optical link 240 and filters out optical signals of different wavelengths through the first ends of different dielectric film filters J1 to the corresponding local wavelength splitter optical link group 220. In the embodiment of the present application, in theory, the first end of each dielectric film filter J1 can only output optical signals of the corresponding wavelength. However, all devices have signal processing precision, and filters also have signal filtering precision. Therefore, the first end of the dielectric film filter J1 can only filter through signals above a certain signal strength and will still output optical signals of other wavelengths below the signal strength. The detection accuracy of OTDR detection is generally very high, and it can detect signals that cannot be filtered and processed by the dielectric film filter J1, that is, filtered leakage optical signals. By detecting whether there is filtered leakage optical signal on the local combiner / demultiplexer 230, it is possible to detect whether there is a transmission fault at all locations on the optical transmission path 2000.

[0071] In an embodiment of the present application, an OTDR detection function is integrated on the local optical module assembly 210. By utilizing the characteristic that the detection accuracy of the OTDR detection function is greater than the filtering accuracy of the local combiner / demultiplexer 230, it is possible to detect whether there are filtered leakage optical signals on multiple local wavelength division optical link groups 220 coupled to the local combiner / demultiplexer 230. Each filtered leakage optical signal represents that a local wavelength division optical link group 220 or a remote wavelength division optical link group 260 can normally send optical signals or normally receive optical signals. By detecting the filtered leakage optical signals, it is possible to detect transmission faults in all links on the optical transmission path 2000. By adopting this solution, full-range detection of the optical transmission path 2000 can be achieved without adding additional components. Compared with the existing technology, this solution does not increase the component cost of the communication system 10000, improves the detection range and accuracy of transmission faults, and can also be applied to the communication system 10000 in more application scenarios.

[0072] In some possible implementations, the uplink optical signal and the downlink optical signal are transmitted using different links. Each wavelength division optical link group includes an uplink and a downlink. At this time, the locations where the transmission failure occurs on the optical transmission path 2000 may be the following: Location 1: The transmission failure occurs on the main optical link 240. Location 2: The transmission failure occurs on the uplink of the wavelength division optical link group 220 at the local end. Location 3: The transmission failure occurs on the downlink of the wavelength division optical link group 220 at the local end. Location 4: The transmission failure occurs on the uplink of the wavelength division optical link group 260 at the remote end. Location 5: The transmission failure occurs on the downlink of the wavelength division optical link group 260 at the remote end. When a transmission failure occurs on the optical transmission path 2000, the detection device X at the local end and the remote communication device 3000 at the remote end can both receive corresponding alarm information. Different alarm information is used to indicate that different links cannot exchange service optical signals. According to different alarm information, different methods can be used to output fault indication signals to indicate that there is a transmission failure at the corresponding location. When multiple local wavelength division optical link groups 220 do not fail at the same time, the remote communication device 3000 receives remote alarm information, which is used to indicate that the first remote wavelength division optical link group 261 among the multiple remote wavelength division optical link groups 260 cannot interact with the corresponding first local wavelength division optical link group 221 for service optical signals.

[0073] Within a first period of time after receiving the remote alarm information, the remote communication device 3000 is configured to: in response to the remote alarm information, within a first period of time, control the first optical module assembly to transmit a first optical signal to an uplink of a first split optical link group among the multiple first wavelength division optical link groups; the alarm information is used to indicate that the split optical link group is unable to exchange service optical signals. For example, as shown in FIG6 , the first optical module assembly is the remote optical module assembly 270, and the multiple first wavelength division optical link groups are the multiple remote wavelength division optical link groups 260. The aforementioned first split optical link group is the first remote wavelength division optical link group 261 among the multiple wavelength division optical link groups that is unable to exchange service optical signals. In this embodiment of the present application, when the first remote wavelength division optical link group 261 among the multiple remote wavelength division optical link groups 260 is unable to exchange service optical signals, within a first period of time after receiving the remote alarm information, the remote communication device 3000 controls the remote optical module assembly 270 to transmit the first optical signal to the first remote uplink 261A of the first remote wavelength division optical link group 261. The transmission fault location is detected by the first optical signal auxiliary detection device X. Based on the first optical signal, the detection device X can respond to the first alarm information and output different fault indication signals according to whether the local optical module assembly 210 detects filtered leakage optical signals from multiple local wavelength division optical link groups 220 based on the OTDR detection function. Specifically, the following fault indication signals can be used:

[0074] In some examples, detection device X can output a first fault indication signal to indicate that a transmission fault has occurred in the first remote uplink 261A. As shown in Figure 6, when the first electrical signal is not received from the local optical module assembly 210 within a first period of time and a first leakage electrical signal is received, the first fault indication signal is output. The first fault indication signal is used to indicate that a transmission fault has occurred in the first local uplink 221A. The first electrical signal indicates that the local optical module assembly 210 received the first optical signal from the first remote uplink 261A and the first local uplink 221A within the first period of time. The first leakage electrical signal indicates that the local optical module assembly 210 detected a filtered leakage optical signal of the first optical signal from any local downlink based on the OTDR detection function within the first period of time.

[0075] In an embodiment of the present application, as shown in FIG7 , the local optical module assembly 210 is provided with multiple optoelectronic conversion circuits 211, a compilation processing circuit 212, and an electrical signal interaction interface 213. Detection device X is coupled to the local optical module assembly 210 via the electrical signal interaction interface 213 to exchange service electrical signals. The electrical signal interaction interface 213 is coupled to the multiple optoelectronic conversion circuits 211 via the compilation processing circuit 212, and is coupled to the uplinks and downlinks of the multiple local wavelength division optical link groups 220 via the multiple optoelectronic conversion circuits 211. Because the first local wavelength division optical link group 221 and the first remote wavelength division optical link group 261 are unable to exchange service optical signals, but not all wavelength division optical link groups 221 are unable to exchange service optical signals, it can be determined that the main optical link 240 has no transmission failure. Within the first period of receiving the remote alarm information, the remote communication device 3000 controls the remote optical module assembly 270 to transmit the first optical signal to the first remote uplink 261A. If there is no transmission failure in the first remote uplink 261A, the first optical signal can be transmitted from the first remote uplink 261A to the main optical link 240, and then from the main optical link 240 to the local combiner / demultiplexer 230. If there is no transmission failure in the first local uplink 221A, the local optical module assembly 210 can receive the first optical signal from the first local uplink 221A, convert the first optical signal into an electrical signal through the corresponding optoelectronic conversion circuit 211, and after compilation and processing by the compilation and processing circuit 212, output the first electrical signal from the electrical signal interaction interface 213. Therefore, if the first electrical signal is not received within the first time, it indicates 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 combiner / demultiplexer 230, based on the OTDR detection function integrated in any local downlink of the local optical module assembly 210, a 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 based on the filtered leakage optical signal of the first optical signal. At this time, it is proved that, in summary, if within the first time, the detection device X does not receive the first electrical signal from the local optical module assembly 210, and receives the first leakage electrical signal, the detection device X can output a first fault indication signal, and the first fault indication signal indicates that the transmission fault occurs in the first local uplink 221A.

[0076] In some examples, detection device X can output a second fault indication signal to indicate that a transmission fault has occurred in the first remote uplink 261A. As shown in Figures 6 and 7, when the first electrical signal and the first leakage electrical signal are not received from the local optical module assembly 210 within a first time, the second fault indication signal is output. In this embodiment 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 has not been transmitted to the local combiner / demultiplexer 230. In this case, detection device X can output a second fault indication signal to indicate that a transmission fault has occurred in the first remote uplink 261A.

[0077] In some examples, when the OTDR detection function of the local optical module assembly 210 is not integrated into the first local downlink 221B of the first local wavelength division optical link 221, but is instead integrated into 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 a transmission fault has occurred in the first remote downlink 261B. As shown in Figures 6 and 7, 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 within a second time after the first time. The third fault indication signal is output 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 first electrical signal is used to indicate that, within a first time period, the local optical module assembly 210 receives a first optical signal from the first remote uplink 261A and the first local uplink 221A. The second leakage electrical signal is used to indicate that, within a second time period, the local optical module assembly 210 detects a filtered leakage optical signal of the first detection optical signal from the second local downlink 222B based on the OTDR detection function. In this embodiment of the present application, when the first electrical signal is received within the first time period, it proves that there is no transmission fault between the first local uplink 211A and the first remote uplink 261A, and that the transmission fault between 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. At this time, within a second time period after the first time period, 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. Because the second local downlink 222B of the second local wavelength division optical link group 222 is integrated with an OTDR detection function, the OTDR detection function can be used to detect whether there is a filtered leakage optical signal of the first detection optical signal on the second local downlink 222B. If there is a 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. The local optical module assembly 210 can output a 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 a third fault indication signal based on the second leakage electrical signal to indicate that a transmission fault has occurred in the first remote downlink 261B.

[0078] In some examples, when the OTDR detection function of the local optical module assembly 210 is not integrated into the first local downlink 221B of the first local wavelength division optical link 221, but is instead integrated into the second local downlink 222B of the second local wavelength division optical link group 222, the detection device X can output a fourth fault indication signal to indicate that a transmission fault has occurred in the first local downlink 221B. As shown in Figures 6 and 7, when a first electrical signal is received from the local optical module assembly 210 within a first time period and a second leakage electrical signal is not received from the local optical module assembly 210 within a second time period, the fourth fault indication signal is output; the fourth fault indication signal is used to indicate that a transmission fault has occurred in the first local downlink 221B. In this embodiment of the present application, when the first electrical signal is received within the first time period, it indicates that there is no transmission fault between the first local uplink 211A and the first remote uplink 261A. Furthermore, when the second leakage electrical signal is not received within the second time period, it indicates that the transmission fault has occurred in the first local downlink 221B.

[0079] In some examples, when the local optical module assembly 210 integrates an OTDR detection function for the first local downlink 221B, the detection device X can output a fifth fault indication signal to transmit the location of a fault on the first remote downlink 261B, or to indicate the location of a transmission fault on the first local downlink 221B. As shown in Figures 6 and 7, the detection device X is configured to, upon receiving a first electrical signal from the local optical module assembly 210 within a first time period, control the local optical module assembly 210 to transmit a second detection optical signal to the first local downlink 221B within a second time period after the first time period. The first electrical signal indicates that the local optical module assembly 210 received the first optical signal from the first remote uplink 261A and the first local uplink 221A within the first time period. 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 first echo optical signal using the OTDR detection function; and the first echo optical signal is an echo optical signal of the second detection optical signal. A fifth fault indication signal is output based on the first detection electrical signal; the fifth fault indication signal is used to indicate the location where the transmission fault occurred on the first remote downlink 261B, or to indicate the location where the transmission fault occurred on the first local downlink 221B. In this embodiment of the present application, when the first electrical signal is received from the local optical module assembly 210 within the first time, it proves that there is no transmission fault between the first local uplink 211A and the first remote uplink 261A, and the transmission fault between 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 an OTDR detection function for the first local downlink 221B, a second detection optical signal can be directly sent to the first local downlink 221B via the local optical module assembly 210. The second detection optical signal is transmitted to the first remote downlink 261B via the main optical link 240. As shown in Figure 8, a schematic diagram of a detection electrical signal obtained from an echo optical signal using the OTDR detection function is shown. 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 determined based on 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 based on the detection results, the location of the transmission fault on the first remote downlink 261B, the main optical link 240, or the first local downlink 221B can be directly determined.

[0080] In summary, in the embodiments shown in Figures 6 and 7 , uplink optical signals and downlink optical signals are transmitted using different links. Each wavelength division optical link group includes an uplink and a downlink. The implementation methods of the above embodiments can be used to locate faults in the uplink and downlink of the local wavelength division optical link group, as well as the uplink and downlink of the remote wavelength division optical link group.

[0081] In some possible implementations, uplink and downlink optical signals are transmitted using the same link. Each wavelength division optical link group includes an uplink and downlink multiplexed link, through which uplink and downlink optical signals are transmitted. In this case, transmission failures on different links can also be detected by filtering leaked optical signals:

[0082] In some examples, when the local optical module assembly 210 integrates an OTDR detection function for the first local wavelength division optical link group 221, as shown in FIG9 , a detection optical signal can be directly sent to the first local uplink and downlink multiplexing link 221C of the first local wavelength division optical link group 221 based on the OTDR detection function, and the location of the transmission fault on the first local uplink and downlink multiplexing link 221C, the main optical link 240, or the first remote uplink and downlink multiplexing link 261C can be determined based on the echo optical signal of the detection optical signal.

[0083] In some examples, when the local optical module assembly 210 integrates an OTDR detection function for the second uplink and downlink multiplexing link 222C of the second local wavelength division optical link group 222, the detection device X can output a sixth fault indication signal to indicate that a transmission fault has occurred in the first remote uplink and downlink multiplexing link 221C. As shown in Figure 9, the detection device X is configured to: in response to the first alarm information, 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 third leakage electrical signal is received from the local optical module assembly 210, the sixth fault indication signal is output; the sixth fault indication signal is used to indicate that a transmission fault has occurred in the first remote uplink and downlink multiplexing link 221C. The third leakage electrical signal is used to indicate that the local optical module assembly 210, based on the OTDR detection function, has detected a filtered leakage optical signal of the third detection optical signal from the second local uplink and downlink multiplexing link 222C. In the embodiment of the present application, when the first local uplink and downlink multiplexing link 221C and the first remote uplink and downlink multiplexing link 261C are unable to exchange service optical signals, in response to the first alarm information, 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 a filtered leakage optical signal of the third detection optical signal is detected from another local uplink and downlink multiplexing link with an integrated OTDR detection function (e.g., the second local uplink and downlink multiplexing link 222C), it is proved that the first local uplink and downlink multiplexing link 221C can normally transmit the third detection optical signal, and the transmission fault occurs on the first remote uplink and downlink multiplexing link 221C.

[0084] In some examples, when the local optical module assembly 210 integrates an OTDR detection function for the second uplink and 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 a transmission fault has occurred in the first local uplink and downlink multiplexing link 221C. As shown in Figure 9, 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; the seventh fault indication signal is used to indicate that the transmission fault has occurred in the first local uplink and downlink multiplexing link 221C. In this embodiment of the present application, when the third leakage electrical signal is not received, it indicates that the third detection optical signal failed to transmit normally on the first local uplink and downlink multiplexing link 221C, and the transmission fault has occurred in the first local uplink and downlink multiplexing link 221C.

[0085] In some possible implementations, in the embodiments shown in Figures 6, 7, and 9 above, 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 Figures 6, 7, and 9, detection device X is further configured to: in response to the second alarm information, control the local optical module assembly 210 to transmit a fourth detection optical signal to any local downlink; the second alarm information is used to indicate that multiple local wavelength division optical link groups 220 and multiple remote wavelength division optical link groups 260 are unable to exchange the service optical signals. A second detection electrical signal is input 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 second echo optical signal based on the OTDR detection function; the second echo optical signal is an echo optical signal of the fourth detection optical signal. An eighth fault indication signal is output based on the second detection electrical signal; the eighth fault indication signal is used to indicate the location of the transmission fault on the main optical link 240. In an embodiment of the present application, when the alarm information received by the detection device X is the second alarm information rather than the first alarm information, it means that all local wavelength division optical link groups 220 and remote wavelength division optical link groups 260 are unable to exchange business optical signals. Under normal circumstances, the probability of all local wavelength division optical link groups 220 and remote wavelength division optical link groups 260 having transmission failures at the same time is very small. At this time, the second alarm information can be used to determine that the transmission failure occurs on the main optical link 240, and the OTDR detection function integrated in the local optical module component 210 can be used to detect the echo optical signal of the fourth detection optical signal, thereby directly determining the specific location of the transmission failure on the main optical link.

[0086] In some possible implementations, when the first alarm information appears, all service optical signal interactions may be suspended to improve the detection accuracy of the filtered leakage optical signal.

[0087] In some examples, the detection device X shown in Figures 4, 6, 7 and 9 is the local communication device 1000. At this time, the local communication device 1000 (or detection device X) is further configured to stop the interactive service optical signal in response to the first alarm information.

[0088] In some examples, as shown in FIG10 , detection device X may be an optical monitoring device configured in communication system 10000 for detecting and managing the optical signal transmission status. In this case, detection device X may output a first control signal to local communication device 1000, where the first control signal is used to control the communication device to stop transmitting the service optical signal.

[0089] In some possible implementations, the local optical module assembly 210 may be an optical module that integrates an optoelectronic conversion circuit 211 and the like for each local wavelength division optical link group 220 .

[0090] In some possible implementations, the local optical module assembly 210 may include multiple optical modules, and is coupled to multiple local wavelength division optical link groups 220 through the multiple optical modules.

[0091] In some implementations, the communication system 10000 may be an optical communication system, in which case the local communication device 1000 and the remote communication device 3000 are optical communication devices.

[0092] In some embodiments, the communication system 10000 may be a wireless communication system. For example, a wireless communication base station. In this case, the local communication device 1000 and the remote communication device 3000 are wireless communication devices. Exemplarily, the communication system 10000 may be a fronthaul network in wireless communication. In some examples, the local communication device 1000 may be a building base band unit (BBU) in the fronthaul network. The remote communication device 3000 may be a remote radio unit (RRU) or an active antenna unit (AAU) in the fronthaul network. In some examples, the local communication device 1000 may be an RRU or AAU in the fronthaul network. The remote communication device 3000 may be a BBU in the fronthaul network. In an embodiment of the present application, taking the CRAN network in wireless communication as an example, in the CRAN network, the number of optical transmission path failures of the communication system constituted by the fronthaul network accounts for approximately 30% of the total number of failures in the CRAN network. The fronthaul network involves numerous components, including RRUs, BBUs, optical module assemblies, optical fibers, and wavelength combiners / demultiplexers. The length of each optical link varies from 1 km to 10 km. The fronthaul network does not include components such as delay splitters F2 and optical reflectors H. Compared to optical communication systems, locating transmission faults in optical transmission path 2000 in the fronthaul network of wireless communication systems is more challenging. The methods described in the above embodiments enable comprehensive, rapid, and accurate location of transmission faults in optical transmission paths in wireless communication systems.

[0093] Based on the communication system 10000 of the structures shown in FIG. 4 , FIG. 5 , FIG. 6 , FIG. 7 , and FIG. 10 , each wavelength division optical link group includes an uplink and a downlink. The first detection method including steps S110 to S130 shown in FIG. 11 below may be executed:

[0094] The first detection method is applied to the remote communication device 3000 and specifically includes the following steps:

[0095] S110 . In response to the alarm information, output a first optical signal.

[0096] In some possible implementations, a communication device exchanges service optical signals with another communication device. Upon receiving an alarm indicating that a certain split optical link group cannot exchange service optical signals, the communication device controls the first optical module assembly to transmit a first optical signal to a first uplink of a certain first split optical link group in the at least one first wavelength division optical link group within a first period of time; the alarm indicating that the certain split optical link group cannot exchange service optical signals.

[0097] Exemplarily, as shown in Figures 6 and 7, the remote communication device 3000 responds to the remote alarm information and, within the first time, controls the remote optical module assembly 270 to send a first optical signal to the first remote uplink 261A of the first remote wavelength division optical link group 261 that is unable to interact with service optical signals.

[0098] In some possible implementations, the remote communication device 3000 is further configured to: stop the interactive service optical signal in response to the alarm information.

[0099] The second detection method is applied to the detection device X, and specifically includes the following steps:

[0100] S120 : Receive an electrical signal from the local optical module assembly 210 .

[0101] In an embodiment of the present application, the first alarm information is used to indicate that a first local wavelength division optical link group 221 among multiple local wavelength division optical link groups 220 and a first remote wavelength division optical link group 261 among multiple remote wavelength division optical link groups 260 are unable to exchange service optical signals. In an embodiment of the present application, the first alarm information may be one or more, and the multiple first alarm information are respectively used to indicate that different local wavelength division optical link groups 220 are unable to exchange service optical signals with the corresponding remote wavelength division optical link group 260. When all local wavelength division optical link groups 220 are unable to exchange service optical signals with the corresponding remote wavelength division optical link group 260, the alarm information received by the detection device X is the second alarm information. When the first alarm information is received, it means that some of the local wavelength division optical link groups 220 are unable to exchange service optical signals, and the main optical link 240 has no transmission fault. The transmission fault occurs at the first local wavelength division optical link group 221 that is unable to exchange service optical signals or at the corresponding first remote wavelength division optical link group 261.

[0102] In some possible implementations, S120 may include the following sub-operations of step S121 to step S122 as shown in FIG12 :

[0103] S121 . Detect a first electrical signal and a first leakage electrical signal from the local optical module assembly 210 within a first time.

[0104] For example, as shown in Figures 6 and 7, if a transmission fault occurs in one of the first remote uplink 261A and the first local uplink 221A, the first electrical signal cannot be output from the local optical module assembly 210 within a first period of time. At this point, based on the OTDR detection function of the local optical module assembly 210, if a first leakage electrical signal (an electrical signal obtained by filtering the 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 operating normally, and the transmission fault occurred 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 fault occurred in the first local uplink 221A.

[0105] For example, as shown in Figures 6 and 7, when remote communication device 3000 controls remote optical module assembly 270 to transmit a first optical signal to first remote uplink 261A, if a first electrical signal derived from the first optical signal can be output from local optical module assembly 210 within a first time, it is confirmed that there are no transmission failures in first remote uplink 261A and first local uplink 221A. In this case, detection device X is required to perform step S122 to determine whether the transmission failure occurred in first remote downlink 261B or first local downlink 221B.

[0106] S122 . Within the second time period, control the local optical module assembly 210 to output a detection optical signal to the first local downlink 221B.

[0107] For example, as shown in Figures 6 and 7, when the local optical module assembly 210 does not integrate an OTDR detection function for the first local downlink 261B, and integrates an OTDR detection function for the second local downlink 222B of the second local wavelength division optical link group 222. The detection device X can, in response to the first alarm information, control the local optical module assembly 210 to output a first detection optical signal to the first local downlink 221B within a second time after the first time. If, based on the OTDR detection function of the local optical module 210, a filtered leakage optical signal of the first detection optical signal can be detected from the second local downlink 222B, a second leakage electrical signal can be obtained. Based on the second leakage electrical signal, it can be determined that the first local downlink 221B can transmit normally.

[0108] For example, as shown in FIG6 and FIG7 , when the local optical module assembly 210 does not integrate an OTDR detection function for the first local downlink 261B, and integrates an OTDR detection function for the second local downlink 222B of the second local wavelength division optical link group 222, if no filtered leakage optical signal of the first detection optical signal is 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 fault occurs at the first local downlink 221B.

[0109] For example, as shown in Figures 6 and 7, when the local optical module assembly 210 integrates an OTDR detection function for the first local downlink 261B, the specific location of the transmission fault occurring on the first remote downlink 261B, the main optical link 240, and the first local downlink 221B can be directly detected and located based on the OTDR detection function. In this case, in response to the first alarm information, when a first electrical signal is received from the local optical module assembly 210 within a first time, the local optical module assembly 210 is controlled to send a second detection optical signal to the first local downlink 221B within a second time after the first time. A first echo optical signal is obtained based on the second detection optical signal, and OTDR detection is performed on the first detection electrical signal corresponding to the first echo optical signal. The location of the transmission fault is determined based on the position of the reflection peak detected by the OTDR.

[0110] S130: Output different fault indication signals according to different electrical signals.

[0111] Illustratively, 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, a first fault indication signal is obtained; the first fault indication signal is used to indicate that a transmission fault occurs in the first local uplink 221A.

[0112] Illustratively, 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 obtained; the second fault indication signal is used to indicate that a transmission fault occurs in the first remote uplink 261A.

[0113] Exemplarily, when a first electrical signal is received from the local optical module component 210 within a first time and a second leakage electrical signal is received from the local optical module component 210 within a second time, a third fault indication signal is obtained; the third fault indication signal is used to indicate that a transmission fault occurs in the first remote downlink 261B.

[0114] Exemplarily, when a first electrical signal is received from the local optical module component 210 within a first time and a second leakage electrical signal is not received from the local optical module component 210 within a second time, a fourth fault indication signal is obtained; the fourth fault indication signal is used to indicate that a transmission fault occurs in the first local downlink 221B.

[0115] For example, when a first electrical signal is received from the local optical module assembly 210 within a first time period and a first detection electrical signal is received within a second time period, a fifth fault indication signal is output based on the first detection electrical signal. The fifth fault indication signal is used to indicate the location where the transmission fault occurred on the first remote downlink 261B, or to indicate the location where the transmission fault occurred on the first local downlink 221B.

[0116] In an embodiment of the present application, when uplink optical signals and downlink optical signals are transmitted using different links, each wavelength division optical link group includes an uplink and a downlink. A first optical signal can be transmitted by remote communication device 3000. Furthermore, a detection optical signal can be transmitted at local detection device X. Based on the reception of the first optical signal and the detection optical signal by the local optical module assembly 210, transmission faults at different locations are determined, and different fault indication signals are output based on the determination results to indicate that a transmission fault has occurred at the corresponding location.

[0117] In the communication system 10000 structured as shown in Figures 4, 5, 9, and 10, uplink and downlink optical signals are transmitted using the same link. Each wavelength division optical link group includes an uplink and downlink multiplexed link, over which both uplink and downlink optical signals are transmitted. A second detection method, including steps S210 through S230, as shown in Figure 13 below, can be executed:

[0118] S210 . In response to the first alarm information, control the local optical module assembly 210 to send a detection optical signal.

[0119] Exemplarily, the local optical module assembly 210 may be controlled to send a detection optical signal to the first local uplink and downlink multiplexing link 221C.

[0120] S220 , receiving an electrical signal from the local optical module assembly 210 .

[0121] For example, 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 is working normally, the local combiner / demultiplexer 230 can receive the third detection optical signal. Then, the local optical module assembly 210 can detect the filtered leakage optical signal of the third detection optical signal from the second local uplink and downlink multiplexing link 222C, and obtain the third leakage electrical signal based on 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 means that the first local uplink and downlink multiplexing link 221C can operate normally, and the transmission fault occurs in the first remote uplink and downlink multiplexing link 261C.

[0122] For example, when the local optical module assembly 210 does not integrate an 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 an 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 is confirmed that the transmission fault occurred in the first local uplink and downlink multiplexing link 221C.

[0123] For example, when the local optical module assembly 210 integrates an OTDR detection function for the first local uplink and downlink multiplexing link 221C of the first local wavelength division optical link group 221 , the location of the transmission fault can be directly detected and determined based on the OTDR detection function.

[0124] S230: Output different fault indication signals according to different electrical signals.

[0125] Exemplarily, when the local optical module component 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 component 210, a sixth fault indication signal is output; the sixth fault indication signal is used to indicate that a transmission fault occurs in the first remote uplink and downlink multiplexing link 221C.

[0126] Exemplarily, when the local optical module component 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 component 210, the seventh fault indication signal is output; the seventh fault indication signal is used to indicate that a transmission fault occurs in the first local uplink and downlink multiplexing link 221C.

[0127] For example, when the local optical module assembly 210 integrates an OTDR detection function for the first local uplink and downlink multiplexing link 221C of the first local wavelength division optical link group 221, a ninth fault indication signal is output based on the OTDR detection function. The ninth fault indication signal directly indicates the location where the transmission fault occurred on the first local uplink and downlink multiplexing link 221C, or the location where the transmission fault occurred on the first remote uplink and downlink multiplexing link 221C. For a description of the relevant technical principles and technical effects of the ninth fault indication signal, reference can be made to the aforementioned description of the fifth fault indication signal, and will not be repeated here.

[0128] In some possible implementations, the detection method described in Figures 11, 12, and 13 may further include the following operation: stopping the interactive service optical signal passing through the optical transmission path 2000. In some examples, the detection device X shown in Figures 4, 6, 7, and 9 is the local communication device 1000. At this time, the local communication device 1000 (or referred to as the detection device X) is also used to: stop the interactive service optical signal in response to the first alarm information. In some examples, as shown in Figure 10, the detection device X can be an optical monitoring device provided in the communication system 10000 for performing optical signal transmission status detection and management. 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 local wavelength division optical link groups 220 to stop the interactive service signal, the detection accuracy of the filtered leakage optical signal can be improved.

[0129] In some possible implementations, when multiple local-end wavelength division optical link groups 220 simultaneously have multiple first local-end wavelength division optical link groups 221 that cannot interact with service optical signals (not all local-end wavelength division optical link groups 220 cannot interact with service optical signals), the above-mentioned first detection method or the second detection method can be used for each first local-end wavelength division optical link group 221 to detect and locate the transmission fault.

[0130] In the communication system 10000 based on the structures shown in FIG. 4 , FIG. 6 , FIG. 7 , FIG. 9 , and FIG. 10 , when all local wavelength division optical link groups 220 are unable to exchange service optical signals, a third control method including steps S310 to S330 shown in FIG. 14 may be used:

[0131] S310 : In response to the second alarm information, send a fourth detection optical signal to the local downlink.

[0132] In the embodiments of the present application, in the structures shown in Figures 4, 6, 7, 9, and 10 above, when the second alarm information is received, it represents that all local wavelength division optical link groups 220 are unable to exchange service optical signals. Because the probability of all local wavelength division optical link groups 220 and all remote wavelength division optical link groups 260 failing simultaneously is very low, it can be determined based on the second alarm information that the transmission failure occurred in the main optical link 240. At this time, the local optical module assembly 210 integrates an OTDR detection function for any local downlink of the multiple local wavelength division optical link groups 220. A fourth detection optical signal can be sent via any local downlink with the integrated OTDR detection function.

[0133] S320 , input a second detection electrical signal from the local optical module assembly 210 .

[0134] In the embodiment of the present application, the fourth detection optical signal generates a second echo signal on the main optical link 240 and the corresponding local downlink and remote downlink. The local optical module assembly 210 obtains a second detection electrical signal based on the second echo signal.

[0135] S330: Obtain an eighth fault indication signal according to the second detection electrical signal.

[0136] In an embodiment of the present application, the location where the transmission fault occurs can be determined based on the position of the emission peak on the second detection electrical signal, and an eighth fault indication signal can be obtained based on the second detection electrical signal; the eighth fault indication signal is used to indicate the location where the transmission fault occurs on the main optical link 240.

[0137] In the embodiment of the present application, depending on the different alarm information received, the detection device X can execute the above-mentioned first detection method, second detection method and third detection method, and output different fault indication signals to indicate that a transmission fault occurs in the corresponding optical link.

[0138] The embodiment of the present application proposes a detection device, a communication device, a detection method and a communication system for detecting transmission faults in an optical transmission path. The optical transmission path includes an optical module assembly coupled in sequence, a combiner / 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. An OTDR detection function is integrated in the optical module assembly. The detection device X is coupled to the optical module assembly. The embodiment of the present application is based on the characteristic that the detection accuracy of the OTDR detection function is greater than the filtering accuracy of the combiner / demultiplexer. The detection device can detect whether there is a filtered leakage optical signal on different links coupled by the combiner / demultiplexer. According to the detection result, the specific location of the transmission fault is determined, 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, there is no need to set up additional devices. The conventional device based on the combiner / demultiplexer to realize optical transmission can realize the detection of transmission faults, and can realize cross-link detection of different optical links coupled on the combiner / demultiplexer. The embodiment of the present application realizes low-cost, high-precision and comprehensive detection of transmission faults in the optical transmission path, and can be applied to the fronthaul networking of wireless communications to realize comprehensive optical transmission fault detection.

[0139] The present application also provides a computer-readable storage medium including instructions. When the instructions are executed on a processor, the processor executes the detection method described in the above embodiments (e.g., the detection method described in Figures 11, 12, 13, and 14).

[0140] The processor involved in the embodiments of the present application may be a chip. For example, it may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processor unit (CPU), a network processor (NP), a digital signal processor (DSP), a microcontroller unit (MCU), a programmable logic device (PLD), or other integrated chips.

[0141] It should be understood that in the various embodiments of the present application, the size of the serial numbers of the above-mentioned processes does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0142] Those skilled in the art will appreciate that the modules and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0143] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and modules described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0144] In the several embodiments provided in this application, it should be understood that the disclosed systems, devices, and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is merely a logical function division. In actual implementation, there may be other division methods, such as multiple modules or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0145] The modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, that is, they may be located on a single device or distributed across multiple devices. Some or all of the modules may be selected to achieve the purpose of this embodiment based on actual needs.

[0146] In addition, the functional modules in the various embodiments of the present application may be integrated into one device, or each module may exist physically separately, or two or more modules may be integrated into one device.

[0147] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loading and executing computer program instructions on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. 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 a website, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.) mode to another website, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can access or a data storage device such as a server or data center that contains one or more media that can be integrated. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0148] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A detection device, characterized in that: Used to detect transmission failures in an optical transmission path; the optical transmission path includes a local optical module assembly, multiple local wavelength division optical link groups, a local wavelength combiner / demultiplexer, and multiple remote wavelength division optical link groups coupled in sequence; the multiple local wavelength division optical link groups are coupled with multiple filter ends of the local wavelength combiner / demultiplexer; the wavelength combining end of the local wavelength combiner / demultiplexer is coupled with the multiple remote wavelength division optical link groups; the local optical module assembly is integrated with an OTDR detection function; the detection accuracy of the OTDR detection function is greater than the filtering accuracy of the local wavelength combiner / demultiplexer; the detection device is used to: In response to the first alarm information, different fault indication signals are output according to whether the local optical module component detects filtered leakage optical signals from the multiple local wavelength division optical link groups based on the OTDR detection function; the first alarm information is used to indicate that: the first local wavelength division optical link group among the multiple local wavelength division optical link groups cannot exchange service optical signals; the fault indication signal is used to indicate: the transmission fault occurs in the first local wavelength division optical link group, or the transmission fault occurs in the first remote wavelength division optical link group corresponding to the first local wavelength division optical link group.

2. The detection device according to claim 1, characterized in that: 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 of the multiple local wavelength division optical link groups; the output of different fault indication signals according to whether the local optical module assembly detects a filtered leakage optical signal from the multiple local wavelength division optical link groups based on the OTDR detection function includes: When the first electrical signal is not received from the local optical module component within the first time and the first leakage electrical signal is received, a first fault indication signal is output; 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 component 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 component detects the 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 used to indicate that the transmission fault occurs in the first remote uplink.

3. The detection device according to claim 1, characterized in that: 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 the second local downlink of the second local wavelength division optical link group; the output of different fault indication signals according to whether the local optical module assembly detects a filtered leakage optical signal from the multiple local wavelength division optical link groups based on the OTDR detection function includes: Within a second time after the first time, controlling the local optical module assembly to output a first detection optical signal to the first local downlink; When a first electrical signal is received from the local optical module component within the first time, and a second leakage electrical signal is received from the local optical module component within the second time, a third fault indication signal is output; 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: within the first time, the local optical module component inputs the first optical signal from the first remote uplink and the first local uplink; the second leakage electrical signal is used to indicate that: within the second time, the local optical module component detects the filtered leakage optical signal of the first detection optical signal from the second local downlink based on the OTDR detection function; or, When a first electrical signal is received from the local optical module component within the first time, and a second leakage electrical signal is not received from the local optical module component within the second time, a fourth fault indication signal is output; the fourth fault indication signal is used to indicate that the transmission fault occurs in the first local downlink.

4. The detection device according to claim 1, characterized in that: 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 the first local downlink; the detection device is also used for: When a first electrical signal is received from the local optical module component within a first time, the local optical module component is controlled to send a second detection optical signal to the first local downlink within a second time after the first time; the first electrical signal is used to indicate that within the first time, the local optical module component inputs a first optical signal from the first remote uplink and the first local uplink. Signal; A first detection electrical signal is input from the local optical module component; the first detection electrical signal is an electrical signal obtained by the local optical module component according to the first echo optical signal based on the OTDR detection function; 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; The fifth fault indication signal is used to indicate the location where the transmission fault occurs on the first remote-end downlink, or to indicate the location where the transmission fault occurs on the first local-end downlink.

5. The detection device according to claim 1, characterized in that: 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; the local optical module assembly integrates the OTDR detection function for the second local uplink and downlink multiplexing link of the second local wavelength division optical link group; the outputting different fault indication signals according to whether the local optical module assembly detects a filtered leakage optical signal from the multiple local wavelength division optical link groups based on the OTDR detection function includes: Controlling the local optical module assembly 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 component, 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 and downlink multiplexing link; the third leakage electrical signal is used to indicate that: the local optical module component detects the filtered leakage optical signal of the third detection optical signal from the second local uplink and downlink multiplexing link based on the OTDR detection function; or, When the third leakage electrical signal is not 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 in the first local uplink and 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; the detection device is also used for: Interacting the service optical signal through the optical transmission path; In response to the first alarm information, the exchange of the service optical signal is stopped.

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 also coupled to a communication device; the communication device interacts with the service optical signal through the optical transmission path; the detection device is also used for: In response to the first alarm information, a first control signal is output to the communication device, where the first control signal is used to control the communication device to stop exchanging the service optical signal.

8. The detection device according to any one of claims 1 to 7, characterized in that: The optical transmission path also includes a main optical link; the combining end of the local combiner / demultiplexer is coupled with the multiple remote wavelength division optical link groups through the main optical link; the local optical module assembly integrates the OTDR detection function for any local downlink link in the multiple local wavelength division optical link groups; the detection device is also used for: In response to the second alarm information, controlling the local optical module assembly to send a fourth detection optical signal to any local downlink; the second alarm information is used to indicate that the multiple local wavelength division optical link groups and the multiple remote wavelength division optical link groups cannot exchange the service optical signal; A second detection electrical signal is input from the local optical module component; the second detection electrical signal is an electrical signal obtained by the local optical module component according to the second echo optical signal based on the OTDR detection function; the second echo optical signal is an echo optical signal of the fourth detection optical signal; outputting an eighth fault indication signal according to the second detection electrical signal; The eighth fault indication signal is used to indicate the occurrence location of the transmission fault on the primary optical link.

9. A communication device, characterized in that: Used to exchange business 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 combiner / splitter, and a plurality of second wavelength division optical link groups coupled in sequence; each of the first wavelength division optical link groups includes a first uplink and a first downlink; the communication device is used to: In response to the alarm information, within a first time, the first optical module assembly is controlled to send a first optical signal to an uplink of a first splitting link group among the multiple first wavelength splitting link groups; the alarm information is used to indicate that the certain splitting link group among the multiple first wavelength splitting link groups cannot exchange service optical signals.

10. The communication device according to claim 9, characterized in that The communication device is also used for: In response to the alarm information, the exchange of the service optical signal is stopped.

11. A detection method, characterized in that: Used to detect transmission faults in an optical transmission path; the optical transmission path includes a local optical module assembly, multiple local wavelength division optical link groups, a local wavelength combiner / demultiplexer, and multiple remote wavelength division optical link groups coupled in sequence; the multiple local wavelength division optical link groups are coupled with multiple filter ends of the local wavelength combiner / demultiplexer; the wavelength combining end of the local wavelength combiner / demultiplexer is coupled with the multiple remote wavelength division optical link groups; the local optical module assembly is integrated with an OTDR detection function; the detection accuracy of the OTDR detection function is greater than the filtering accuracy of the local wavelength combiner / demultiplexer; the method includes: In response to the first alarm information, different fault indication signals are obtained according to whether the local optical module component detects filtered leakage optical signals from the multiple local wavelength division optical link groups based on the OTDR detection function; the first alarm information is used to indicate that: the first local wavelength division optical link group among the multiple local wavelength division optical link groups cannot exchange service optical signals; the fault indication signal is used to indicate that the transmission fault occurs in the first local wavelength division optical link group, or the transmission fault occurs in the first remote wavelength division optical link group corresponding to the first local wavelength division optical link group.

12. The detection method according to claim 11, characterized in that: 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 of the multiple local wavelength division optical link groups; the different fault indication signals are obtained according to whether the local optical module assembly detects a filtered leakage optical signal from the multiple local wavelength division optical link groups based on the OTDR detection function, including: When the first electrical signal is not received from the local optical module component within the first time and the first leakage electrical signal is received, a first fault indication signal is obtained; 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: within the first time, the local optical module component 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 component detects the 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 obtained; the second fault indication signal is used to indicate that the transmission fault occurs in the first local uplink.

13. The detection method according to claim 12, characterized in that: 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 the second local downlink of the second local wavelength division optical link group; the different fault indication signals are obtained according to whether the local optical module assembly detects the filtered leakage optical signal from the multiple local wavelength division optical link groups based on the OTDR detection function, including: In response to the first alarm information, within a second time after the first time, control the local optical module assembly to output a first detection optical signal to the first local downlink; When a first electrical signal is received from the local optical module component within the first time, and a second leakage electrical signal is received from the local optical module component within the second time, a third fault indication signal is obtained; 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: within the first time, the local optical module component inputs the first optical signal from the first remote uplink and the first local uplink; the second leakage electrical signal is used to indicate that: within the second time, the local optical module component detects the filtered leakage optical signal of the first detection optical signal from the second local downlink based on the OTDR detection function; or, When a first electrical signal is received from the local optical module component within the first time, and a second leakage electrical signal is not received from the local optical module component within the second time, a fourth fault indication signal is obtained; the fourth fault indication signal is used to indicate that the transmission fault occurs in the first local downlink.

14. The detection method according to claim 11, characterized in that: 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 the first local downlink; the detection method also includes: In response to the first alarm information, when a first electrical signal is received from the local optical module assembly within a first time, the local optical module assembly is controlled to send a second detection optical signal to the first local downlink within a second time after the first time; 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 component; the first detection electrical signal is the local optical module component based on the The OTDR detection function obtains an electrical signal according to the first echo optical signal; the first echo optical signal is the 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 location where the transmission fault occurs on the first remote downlink, or to indicate the location where the transmission fault occurs on the first local downlink.

15. The detection method according to claim 11, characterized in that: 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; the local optical module assembly integrates the OTDR detection function for the second local uplink and downlink multiplexing link of the second local wavelength division optical link group; the different fault indication signals are obtained according to whether the local optical module assembly detects the filtered leakage optical signal from the multiple local wavelength division optical link groups based on the OTDR detection function, including: Controlling the local optical module assembly 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 component, 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 and downlink multiplexing link; the third leakage electrical signal is used to indicate that: the local optical module component detects the filtered leakage optical signal of the third detection optical signal from the second local uplink and downlink multiplexing link based on the OTDR detection function; or, When the third leakage electrical signal is not 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 in the first local uplink and downlink multiplexing link.

16. The detection method according to any one of claims 11 to 15, characterized in that: The method is performed based on a communication device; the method also includes: In response to the first alarm information, the exchange of the service optical signal is stopped.

17. The detection method according to any one of claims 11 to 15, characterized in that: The method is performed based on a light monitoring device; the method further comprises: In response to the first alarm information, a first control signal is output to the communication device, where the first control signal is used to control the communication device to stop exchanging the service optical signal.

18. The detection method according to any one of claims 11 to 17, characterized in that: The optical transmission path also includes a main optical link; the combining end of the local combiner / demultiplexer is coupled with the multiple remote wavelength division optical link groups through the main optical link; the local optical module assembly integrates the OTDR detection function for any local downlink link in the multiple local wavelength division optical link groups; the method also includes: In response to the second alarm information, controlling the local optical module assembly to send a fourth detection optical signal to any local downlink; the second alarm information is used to indicate that the multiple local wavelength division optical link groups and the multiple remote wavelength division optical link groups cannot exchange the service optical signal; A second detection electrical signal is input from the local optical module component; the second detection electrical signal is an electrical signal obtained by the local optical module component according to the second echo optical signal based on the OTDR detection function; 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 the occurrence location of the transmission fault on the main optical link.

19. A detection method, characterized in that: Based on a communication device; the communication device is used 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 combiner / splitter, and a plurality of second wavelength division optical link groups coupled in sequence; each of the local wavelength division optical link groups includes a local uplink and a local downlink; the method includes: In response to the alarm information, within a first time, the first optical module assembly is controlled to send a first optical signal to an uplink of a first splitting link group among the multiple first wavelength splitting link groups; the alarm information is used to indicate that the certain splitting link group among the multiple first wavelength splitting link groups cannot exchange service optical signals.

20. The detection method according to claim 19, characterized in that: The method further comprises: In response to the alarm information, the exchange of the service optical signal is stopped.

21. A communication system, characterized in that: It comprises a detection device and 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 wavelength combiner / demultiplexer, a plurality of remote wavelength division optical link groups and a remote optical module assembly coupled in sequence; the plurality of local wavelength division optical link groups are coupled with a plurality of filter ends of the local wavelength combiner / demultiplexer; the wavelength combining end of the local wavelength combiner / 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 accuracy of the OTDR detection function is greater than the filtering accuracy of the local wavelength combiner / demultiplexer; wherein: The optical transmission path is used for: exchanging business optical signals; The detection device is used to: interact with the remote communication device for business optical signals; in response to the local alarm information, output different fault indication signals according to whether the local optical module component detects filtered leakage optical signals from the multiple local wavelength division optical link groups based on the OTDR detection function; the local alarm information is used to indicate that the first local wavelength division optical link group among the multiple local wavelength division optical link groups cannot interact with business optical signals; the fault indication signal is used to indicate that the transmission fault occurs in the first local wavelength division optical link group, or the transmission fault occurs in the first remote wavelength division optical link group corresponding to the first local wavelength division optical link group.

22. The communication system according to claim 21, characterized in that 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 of the multiple local wavelength division optical link groups; the communication system also includes a remote communication device and a remote optical module; the remote communication device is coupled to the multiple remote wavelength division optical link groups through the remote optical module; wherein: The remote communication device is used to: in response to the 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 used to indicate that the first remote wavelength division optical link group cannot exchange service optical signals; The detection device is used to: in response to the local alarm information, output different fault indication signals: When the first electrical signal is not received from the local optical module component within the first time and the first leakage electrical signal is received, 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 component 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: the local optical module component detects the 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 used to indicate that the transmission fault occurs in the first local uplink.

23. The communication system according to claim 21, characterized in that 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 the second local downlink of the second local wavelength division optical link group; The remote communication device is used to: in response to the 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 used to indicate that the first remote wavelength division optical link group cannot exchange service optical signals; The detection equipment is used for: In response to the local-end alarm information, within a second time after the first time, control the local-end optical module assembly to output a first detection optical signal to the first local-end downlink; When a first electrical signal is received from the local optical module assembly within the first time, and a second leakage electrical signal is received from the local optical module assembly within the second time, a third fault indication signal is output; 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: 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 second leakage electrical signal is used to indicate that: within the second time, the local optical module component detects the filtered leakage optical signal of the first detection optical signal from the second local downlink based on the OTDR detection function; Alternatively, when a first electrical signal is received from the local optical module assembly within the first time, and a second leakage electrical signal is not received from the local optical module assembly within the second time, a fourth fault indication signal is output; The fourth fault indication signal is used to indicate that the transmission fault occurs in the first local downlink.

24. The communication system according to any one of claims 21 to 23, characterized in that: The detection device is a local communication device; the detection device is also used for: In response to the local alarm information, the service optical signal is stopped from being exchanged with the optical transmission path.

25. The communication system according to any one of claims 21 to 23, characterized in that: The detection device is an optical monitoring device; the communication system also includes a local communication device; the detection device is also used for: In response to the local alarm information, a first control signal is output to the local communication device; the first control signal is used to control the The communication device stops exchanging the service optical signal.

26. A computer-readable storage medium, characterized in that: The computer-readable storage medium includes instructions; when the instructions are executed on a processor, the processor is caused to execute the method according to any one of claims 11 to 18, or the method according to claim 19 or 20.

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