Detection device, communication device, detection method and communication system

Abstract

The invention discloses detection equipment, communication equipment, a detection method and a communication system, which are applied to the technical field of communication based on an optical path and are used for carrying out transmission fault detection on an optical transmission path. The optical transmission path comprises a home-end optical module assembly, a plurality of home-end wavelength division optical link groups, a home-end combiner / splitter and a plurality of far-end wavelength division optical link groups which are sequentially coupled. According to the scheme, based on the characteristic that the detection precision of the OTDR detection function is greater than the filtering precision of the multiplexer / demultiplexer, detection of transmission faults on different optical links coupled by the multiplexer / demultiplexer can be realized. Through the above mode, no extra detection device needs to be arranged, and cross-link comprehensive detection of different optical links coupled on the combiner / splitter can be realized by adopting a conventional device for realizing optical transmission based on the combiner / splitter. According to the invention, the transmission fault of the optical transmission path can be detected comprehensively with low cost and high precision, and the method can be applied to forward transmission networking of wireless communication and / or optical communication networking.

Description

Technical Field

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

[0002] In the field of communication technology, two communication devices can interact with each other through an optical transmission path. The optical transmission path includes multiple local optical splitting links, a main optical link, and multiple remote optical splitting links. The local communication device sends multiple different or identical service optical signals to the main optical link through multiple local optical splitting links, and the main optical link transmits the multiple service optical signals to multiple remote optical splitting links. The remote communication device obtains the service optical signal sent by the local communication device from multiple remote optical splitting links. Alternatively, the remote communication device can also send multiple service optical signals to the local communication device through multiple remote optical splitting links, the main optical link, and multiple local optical splitting links. In actual applications, the length of the optical transmission path to be laid is different depending on the distance between the two communication devices. When a transmission fault occurs on the transmission path, it is usually difficult to determine the location of the transmission fault on the optical transmission path, which makes it extremely difficult to inspect and repair the fault of the optical transmission path, thereby greatly affecting the service interaction between the two communicating parties.

[0003] One way to detect transmission faults in an optical transmission path is to set up an optical time domain reflectometer to perform fault detection on the optical link to detect the location where the fault occurs. However, this detection method can only detect faults on the trunk link. When the optical transmission path includes a trunk link and multiple different slave links, cross-link fault detection on different slave links cannot be achieved. Summary of the invention

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

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

[0006] In the first aspect, a detection device is provided for detecting transmission faults of an optical transmission path. The optical transmission path includes a local optical module assembly, a plurality of local wavelength division optical link groups, a local wavelength division multiplexer and a plurality of remote wavelength division optical link groups coupled in sequence; the plurality of local wavelength division optical link groups are coupled with a plurality of filter ends of the local wavelength division multiplexer; the wavelength division multiplexer end of the local wavelength division multiplexer is coupled with a 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 division multiplexer. 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 a filtered leakage optical signal from a plurality of 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 plurality of 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.

[0007] In the 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 to the combiner / splitter, and judge the specific location of the transmission fault according to the detection result, and output different fault indication signals to indicate the optical link where the transmission fault is located. Through the above-mentioned 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 scheme 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.

[0008] In a possible implementation, 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 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:

[0009] 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 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 assembly inputs the first optical signal from the first remote uplink and the first local uplink; the first leakage electrical signal is used to indicate that: within the first time, the local optical module assembly detects the filtered leakage optical signal of the first optical signal from any 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, then the transmission fault occurs in the first local uplink.

[0010] In some examples, the local optical module assembly integrates an OTDR detection function for any local downlink of multiple 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 the transmission fault occurs 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 proves 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 proves that the first remote uplink fails to transmit the first optical signal, then the transmission fault occurs in the first local uplink.

[0011] 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 the 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 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 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 is proved that the first local downlink has normally transmitted the first detection optical signal, and the transmission fault occurs in the first local downlink.

[0012] 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 a 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 not received within a second time, it proves that the first local downlink fails to transmit the first detection optical signal, then the transmission fault occurs in the first local downlink.

[0013] 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 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. In an embodiment of the present application, when the first electrical signal is received within the first time, it is proved 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. 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 through the OTDR detection function.

[0014] 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:

[0015] 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 the 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 the 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, the third detection optical signal can be sent to the first local uplink and downlink multiplexing link. If the OTDR detection function integrated in 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, proving that the first local uplink and downlink multiplexing link can transmit the third detection optical signal normally, it can be confirmed that the transmission fault occurs in the first remote uplink and downlink multiplexing link.

[0016] 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 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 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 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 normally transmit the third detection optical signal, and then it can be confirmed that the transmission fault occurs in the first local uplink and downlink multiplexing link.

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

[0018] In one possible implementation, the detection device is an optical monitoring device. The optical module assembly at this end is also coupled to a communication device. The communication device interacts with service optical signals through an optical transmission path. The detection device is also used to: in response to a first alarm message, output a first control signal to the communication device, 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 message, 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.

[0019] In a possible implementation, 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 the 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 cannot 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 according to 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 time, the transmission fault of the main optical link can be directly detected and located based on the integrated OTDR detection function.

[0020] 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, within a first time, control the first optical module assembly to send a first optical signal to an uplink of a first wavelength division optical link group among the plurality of first wavelength division optical link groups; the alarm message is used to indicate that a first wavelength division optical link group among the plurality of first wavelength division optical link groups cannot interact with service optical signals.

[0021] 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 controls 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.

[0022] In a 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 failure, both communicating parties stop the interactive service optical signal, which can improve the detection accuracy of the transmission failure.

[0023] In the third aspect, the embodiment of the present application also provides a detection method for detecting transmission failures of optical transmission paths. The optical transmission path includes a local optical module component, multiple local wavelength division optical link groups, a local combiner and a plurality of 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 combiner and the combiner; the combining end of the local combiner and the combiner is coupled with multiple remote wavelength division optical link groups; the local optical module component 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 and the combiner. 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 the filtered leakage optical signal 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 interact with the service optical signal; 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.

[0024] In a possible implementation, 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 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:

[0025] In some examples, the local optical module assembly integrates an OTDR detection function for any local downlink of multiple 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 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 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.

[0026] In some examples, the local optical module assembly integrates an OTDR detection function for any local downlink of multiple 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 the transmission fault occurs 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 proves 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 proves that the first remote uplink fails to transmit the first optical signal, then the transmission fault occurs in the first local uplink.

[0027] 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 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 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.

[0028] 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.

[0029] In some examples, the local optical module component integrates an OTDR detection function for the first local downlink. 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 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 component; the first detection electrical signal is an electrical signal obtained by the local optical module component based on the first echo optical signal based on the OTDR detection function; the first echo optical signal is the echo optical signal of the second detection optical signal. A fifth fault indication signal is output according to the first detection electrical signal; the fifth fault indication signal is used to indicate the 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.

[0030] 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:

[0031] 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.

[0032] 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 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 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 occurs in the first local uplink and downlink multiplexing link.

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

[0034] In a possible implementation, the method is executed 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.

[0035] In a possible implementation, 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 component 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 component 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 cannot exchange service optical signals. 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 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.

[0036] 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 business 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 business optical signals.

[0037] In a possible implementation manner, the method further includes: stopping the interactive service optical signal in response to the alarm information.

[0038] 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 component, multiple local wavelength division optical link groups, a local combiner / demultiplexer, multiple remote wavelength division optical link groups and a remote optical module component coupled in sequence. Multiple local wavelength division optical link groups are coupled with multiple filter ends of the local combiner / demultiplexer. The combining end of the local combiner / demultiplexer is coupled with multiple remote wavelength division optical link groups. The local optical module component 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 for: interacting with business optical signals. The detection device is used for: interacting with business 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 component 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 multiple local wavelength division optical link groups 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, 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.

[0039] In a possible implementation, 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 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 with 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 assembly within the first time and the 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 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. Alternatively, when the first electrical signal and the first leakage electrical signal are not received from the local optical module component within the first time, the 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.

[0040] In a possible implementation, 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 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 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 a filtered leakage optical signal of the first detection optical signal from the second local downlink based on the OTDR detection function. Alternatively, when the first electrical signal is received from the local optical module component within the first time, and the second leakage electrical signal is not received from the local optical module component within the second time, the fourth fault indication signal is output; the fourth fault indication signal is used to indicate that a transmission fault occurs in the first local downlink.

[0041] In a possible implementation manner, 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.

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

[0043] In a sixth aspect, an embodiment of the present application further provides a computer-readable storage medium, the computer-readable storage medium comprising instructions. When the instructions are executed on a processor, the processor executes the method described in the third aspect above, or executes the method described in the fourth aspect above.

[0044] 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

[0045] Figure 1 A schematic diagram of a structure for detecting transmission faults on a single link based on OTDR;

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

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

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

[0049] Figure 5 A schematic diagram of the structure of a local-end combiner / demultiplexer provided in an embodiment of the present application;

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

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

[0052] Figure 8 A schematic diagram of detecting electrical signals based on OTDR provided in an embodiment of the present application;

[0053] Fig. 9 A schematic diagram of another communication system provided in an embodiment of the present application Figure 5 ;

[0054] Fig.10 A schematic diagram of another communication system provided in an embodiment of the present application Figure 6 ;

[0055] Fig.11 A schematic diagram of a first detection method provided in an embodiment of the present application Figure 1 ;

[0056] Fig.12 Schematic diagram of another first detection method provided in the embodiment of the present application Figure 2 ;

[0057] Fig.13 A schematic diagram of a second detection method provided in an embodiment of the present application;

[0058] Fig.14 A schematic flow chart of a third detection method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0059] 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.

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

[0061] The terms "coupling" and "connection" involved in the embodiments of the present application should be understood in a broad sense. For example, they may refer to a direct physical connection, or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.

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

[0063] like Figure 1 As shown, 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 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 where the transmission fault occurs 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.

[0064] When the optical fiber that transmits the optical signal includes multiple different links, it is necessary to add certain equipment to assist in the detection of multiple links. Figure 2As shown, the local equipment J is coupled with multiple branch optical fibers through the trunk optical fiber and the splitter F1, and is coupled with multiple terminal equipment Z through multiple branch optical fibers. When the OTDR needs to detect transmission faults on different multiple branch optical fibers, the OTDR can detect the split links connected to different optical network units (ONUs) based on the delay splitter F2 and the optical reflector H. This solution couples the OTDR with multiple links. The optical signals on different split links are delayed by the delay splitter, and the echo optical signals on different split links are received by the OTDR respectively to realize the identification of different split links. However, this solution still requires the OTDR to be coupled with different links. At the same time, it is also necessary to set up a delay splitter F and multiple optical reflectors H. In this way, the communication system layout is complicated and the cost is increased. It is not suitable for scenarios without relevant hardware configuration, nor for scenarios where the delay splitter F2 and the optical reflector H cannot be configured.

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

[0066] In order to detect transmission failures in the optical transmission path 2000 of the communication system 10000, as Figure 4 As shown, the communication system 10000 also includes a detection device X, which is used to detect transmission faults in the optical transmission path 2000. The optical transmission path 2000 includes a local optical module assembly 210, multiple local wavelength division optical link groups 220, a local combiner / demultiplexer 230, a main optical link 240, a remote combiner / demultiplexer 250, multiple remote wavelength division optical link groups 260 and a remote optical module assembly 270, which are coupled in sequence. 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. Multiple local wavelength division optical link groups 220 are coupled to multiple filter ends of the local combiner / demultiplexer 230. The combining end of the local combiner / demultiplexer 230 is coupled to 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:

[0067] 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.

[0068] For example, Figure 5 As shown, it is a schematic diagram of the structural principle of the combiner / splitter. Multiple dielectric film filters J1 and optical fiber connectors J2 are integrated inside the combiner / splitter. The first ends of the multiple dielectric film filters serve as the filter ends of the combiner / splitter, and the second ends of the multiple dielectric film filters J1 are coupled to the optical fiber connectors J2 respectively. The optical fiber connector J2 is used to combine the optical signals of different wavelengths received by each dielectric film filter. The first end of a dielectric film filter J1 among the multiple 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, multiple local end wavelength division optical link groups 220 are coupled to the first ends (i.e., the filtering ends) of multiple dielectric film filters J1. The first end of the dielectric film filter J1 is used to filter through the optical signal of the corresponding wavelength, and the local end wavelength division optical link 220 coupled to the first end of a dielectric film filter J1 transmits the optical signal of the corresponding wavelength. The second end of the dielectric film filter J1 combines optical signals of different wavelengths through the 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 division 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 an optical signal 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 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 usually 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 a filtered leakage optical signal on the local combiner / splitter 230, it is possible to detect whether there is a transmission fault at all positions on the optical transmission path 2000.

[0069] 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 is a filtered leakage optical signal 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 an optical signal or normally receive an optical signal. By detecting the filtered leakage optical signal, the transmission fault detection of all links on the optical transmission path 2000 can be realized. By adopting this solution, full-range detection of the optical transmission path 2000 can be realized without adding additional devices. Compared with the prior art, this solution does not increase the device 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.

[0070] 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 business optical signals.

[0071] Within the first time after receiving the remote alarm information, the remote communication device 3000 is used to: in response to the remote alarm information, control the first optical module assembly to send a first optical signal to the uplink of a first split optical link group among the multiple first wavelength split optical link groups within the first time; the alarm information is used to indicate that a certain split optical link group cannot exchange service optical signals. For example, Figure 6As shown, the first optical module component is a remote optical module component 270, and the multiple first wavelength division optical link groups are multiple remote wavelength division optical link groups 260. The aforementioned first wavelength division optical link group is the first remote wavelength division optical link group 261 that cannot exchange service optical signals among the multiple wavelength division optical link groups. In an 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 cannot exchange service optical signals, within the first time after receiving the remote alarm information, the remote communication device 3000 will control the remote optical module component 270 to send a first optical signal to the first remote uplink 261A of the first remote wavelength division optical link group 261. The first optical signal is used to assist the detection device X in detecting the transmission fault location. 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 component 210 detects the filtered leakage optical signal from the multiple local wavelength division optical link groups 220 based on the OTDR detection function. Specifically, there can be the following fault indication signals:

[0072] In some examples, the detection device X may output a first fault indication signal to indicate that a transmission fault occurs in the first remote uplink 261A. Figure 6 As shown, 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 output, and the first fault indication signal is used to indicate that the transmission fault occurs in the first local uplink 221A. The first electrical signal is used to indicate that: within the first time, the local optical module assembly 210 inputs the first optical signal from the first remote uplink 261A and the first local uplink 221A; the first leakage electrical signal is used to indicate that: within the first time, the local optical module assembly 210 detects a filtered leakage optical signal of the first optical signal from any local downlink based on the OTDR detection function.

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

[0074] In some examples, the detection device X may output a second fault indication signal to indicate that a transmission fault has occurred in the first remote uplink 261A. Figure 6 and Figure 7As shown, when the first electrical signal and the first leakage electrical signal are not received from the local optical module assembly 210 within the first time, the second fault indication signal is output. In the embodiment of the present application, when the first electrical signal and the first leakage electrical signal are not received, it can be determined that the first optical signal is not transmitted to the local combiner / demultiplexer 230, and the detection device X can output the second fault indication signal to indicate that the transmission fault occurs in the first remote uplink 261A.

[0075] In some examples, when the OTDR detection function of the local optical module assembly 210 is not integrated in the first local downlink 221B of the first local wavelength division optical link 221, but is integrated in the second local downlink 222B of the second local wavelength division optical link group 222, the detection device X can output a third fault indication signal to indicate that the transmission fault occurs in the first remote downlink 261B. Figure 6 and Figure 7As shown, the detection device X is also used 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. When a first electrical signal is received from the local optical module assembly 210 within the first time, and a second leakage electrical signal is received from the local optical module assembly 210 within the second time, a third fault indication signal is output. The first electrical signal is used to indicate that: within the first time, the local optical module assembly 210 inputs the 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 the second time, 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 the embodiment of the present application, when the first electrical signal is received within the first time, it is proved that there is no transmission failure between the first local uplink 211A and the first remote uplink 261A, and the transmission failure of the first local wavelength division optical link group 221 and the first remote wavelength division optical link group 261 occurs between the first local downlink 221B and the first remote downlink 261B. At this time, within the second time after the first time, the detection device X can control the local optical module assembly 210 to send the first detection optical signal to the first local downlink 221B. Because the OTDR detection function is integrated on the second local downlink 222B of the second local wavelength division optical link group 222, 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, and the local optical module assembly 210 can output a second leakage electrical signal based on the filtered leakage optical signal of the first detection optical signal to the detection device X. The detection device X outputs a third fault indication signal according to the second leakage electrical signal to indicate that the transmission fault occurs in the first remote downlink 261B.

[0076] In some examples, when the OTDR detection function of the local optical module assembly 210 is not integrated in the first local downlink 221B of the first local wavelength division optical link 221, but is integrated in 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 the transmission fault occurs in the first local downlink 221B. Figure 6 and Figure 7As shown, when a first electrical signal is received from the local optical module assembly 210 within a first time, and a second leakage electrical signal is not received from the local optical module assembly 210 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 221B. In the embodiment of the present application, when the first electrical signal is received within a first time, it is proved that there is no transmission fault between the first local uplink 211A and the first remote uplink 261A. And, if the second leakage electrical signal is not received within a second time, it is proved that the transmission fault occurs at the first local downlink 221B.

[0077] 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 where the fault occurs on the first remote downlink 261B, or to indicate the location where the transmission fault occurs on the first local downlink 221B. Figure 6 and Figure 7 As shown, the detection device X is used to: when receiving a first electrical signal from the local optical module component 210 within a first time, control the local optical module component 210 to send a second detection optical signal to the first local downlink 221B 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 210 inputs the first optical signal from the first remote uplink 261A and the first local uplink 221A. The first detection electrical signal is input from the local optical module component 210; the first detection electrical signal is an electrical signal obtained by the local optical module component 210 based on the first echo optical signal based on the OTDR detection function; the first echo optical signal is the echo optical signal of the second detection optical signal. The fifth fault indication signal is output according to the first detection electrical signal; the fifth fault indication signal is used to indicate the location where the transmission fault occurs on the first remote downlink 261B, or, to indicate the location where the transmission fault occurs on the first local downlink 221B. In an embodiment of the present application, when a first electrical signal is received from the local optical module assembly 210 within the first time, it proves that there is no transmission failure between the first local uplink 211A and the first remote uplink 261A, and the transmission failure 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 the OTDR detection function for the first local downlink 221B, a second detection optical signal can be directly sent to the first local downlink 221B through the local optical module assembly 210. The second detection optical signal is transmitted to the first remote downlink 261B through the main optical link 240. Figure 8As shown, it is a schematic diagram of the detection electrical signal obtained according to the echo optical signal based on the OTDR detection function. A Fresnel reflection will be generated at the location where the transmission fault is located on the optical link, forming a strong reflection peak. The location of the transmission fault on the optical link can be located according to the location of the reflection peak in the detection electrical signal. Based on the OTDR detection function, the echo optical signal of the second detection optical signal can be detected, and the location where the transmission fault occurs on the first remote downlink 261B, the main optical link 240, or the first local downlink 221B can be directly determined according to the detection result.

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

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

[0080] 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. Fig. 9 As shown, 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 according to the echo optical signal of the detection optical signal.

[0081] 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 occurs in the first remote uplink and downlink multiplexing link 221C. Fig. 9As shown, the detection device X is used to: in response to the first alarm information, control the local optical module component 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 component 210, 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 221C. The third leakage electrical signal is used to indicate that the local optical module component 210 detects a filtered leakage optical signal of the third detection optical signal from the second local uplink and downlink multiplexing link 222C based on the OTDR detection function. In an 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 cannot interact with the service optical signal, in response to the first alarm information, the detection device X can control the local optical module component 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 other local uplink and downlink multiplexing links (such as the second local uplink and downlink multiplexing link 222C) that integrates the OTDR detection function, it proves 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.

[0082] 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 occurs in the first local uplink and downlink multiplexing link 221C. Fig. 9 As shown, the detection device X is used to: output a 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 occurs in the first local uplink and downlink multiplexing link 221C. In the embodiment of the present application, when the third leakage electrical signal is not received, it means that the third detection optical signal fails to be normally transmitted on the first local uplink and downlink multiplexing link 221C, and the transmission fault occurs on the first local uplink and downlink multiplexing link 221C.

[0083] In some possible implementations, in the above Figure 6 , Figure 7 and Fig. 9 In the embodiment shown, the detection device X may output an eighth fault indication signal to indicate the location where the transmission fault occurs on the main optical link 240. For example, Figure 6 , Figure 7 and Fig. 9As shown, the detection device X is also used to: in response to the second alarm information, control the local optical module assembly 210 to send a fourth detection optical signal to any local downlink; the second alarm information is used to indicate that multiple local wavelength division optical link groups 220 and multiple remote wavelength division optical link groups 260 cannot interact with the service optical signal. 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 according to 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. 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 the local wavelength division optical link groups 220 and the remote wavelength division optical link groups 260 are unable to exchange business optical signals. Under normal circumstances, the probability of all the local wavelength division optical link groups 220 and the remote wavelength division optical link groups 260 having transmission failures at the same time is very small. At this time, it can be determined through the second alarm information that the transmission failure occurs on the main optical link 240, and the echo optical signal of the fourth detection optical signal can be detected through the OTDR detection function integrated in the local optical module component 210, so as to directly determine the specific location of the transmission failure on the main optical link.

[0084] 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.

[0085] In some examples, such as Figure 4 , Figure 6 , Figure 7 and Fig. 9 The detection device X shown 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.

[0086] In some examples, such as Fig.10 As shown, the detection device X may be an optical monitoring device for performing optical signal transmission status detection and management in the communication system 10000. At this time, the detection device X may 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 exchanging service optical signals.

[0087] In some possible implementations, the local optical module assembly 210 may be an optical module, and the optical module integrates an optoelectronic conversion circuit 211 and the like for each local wavelength division optical link group 220 .

[0088] In some possible implementations, the local optical module assembly 210 may include multiple optical modules, and the multiple optical modules are respectively coupled to the multiple local wavelength division optical link groups 220 .

[0089] In some implementations, the communication system 10000 may be an optical communication system. In this case, the local communication device 1000 and the remote communication device 3000 are optical communication devices.

[0090] In some embodiments, the communication system 10000 may be a wireless communication system. For example, a wireless communication base station. At this time, the local communication device 1000 and the remote communication device 3000 are wireless communication devices. Exemplarily, the communication system 10000 may be a fronthaul networking in wireless communication. In some examples, the local communication device 1000 may be a building base band unit (BBU) in the fronthaul networking. The remote communication device 3000 may be a remote radio unit (RRU) or an active antenna unit (AAU) in the fronthaul networking. In some examples, the local communication device 1000 may be an RRU or AAU in the fronthaul networking. The remote communication device 3000 may be a BBU in the fronthaul networking. In an embodiment of the present application, taking the CRAN networking in wireless communication as an example, in the CRAN networking, the number of optical transmission path failures of the communication system constituted by the fronthaul networking accounts for about 30% of the total number of failures of the CRAN networking. The fronthaul network involves many devices such as RRU, BBU, optical module components, optical fiber and combiner / demultiplexer, and the laying path of each optical link varies from 1km to 10km. Devices such as delay splitter F2 and optical reflector H are not set in the fronthaul network. Compared with the optical communication system, in the fronthaul network of the wireless communication system, it is more difficult to locate the transmission fault of the optical transmission path 2000. The method recorded in the above embodiment can comprehensively, quickly and accurately locate the transmission fault of the optical transmission path in the wireless communication system.

[0091] Based on the above Figure 4 , Figure 5 , Figure 6 , Figure 7 , Fig.10 In the communication system 10000 of the structure shown, each wavelength division optical link group includes an uplink and a downlink, and can perform the following Fig.11 The first detection method shown includes steps S110 to S130:

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

[0093] S110. In response to the alarm information, output a first optical signal.

[0094] In some possible implementations, a communication device exchanges service optical signals with another communication device. After receiving an alarm message that a certain split optical link group cannot exchange service optical signals, within a first time, the first optical module assembly is controlled to send a first optical signal to a first uplink of a certain first split optical link group in the at least one first wavelength split optical link group; the alarm message is used to indicate that the certain split optical link group cannot exchange service optical signals.

[0095] For example, Figure 6 and Figure 7 As shown, in response to the remote alarm information, the remote communication device 3000 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 cannot interact with service optical signals within a first time.

[0096] 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.

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

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

[0099] In the embodiment of the present application, the first alarm information is used to indicate that the first local wavelength division optical link group 221 of the multiple local wavelength division optical link groups 220 and the first remote wavelength division optical link group 261 of the multiple remote wavelength division optical link groups 260 cannot exchange service optical signals. In the embodiment of the present application, the first alarm information can be one or more, and the multiple first alarm information are respectively used to indicate that different local wavelength division optical link groups 220 cannot exchange service optical signals with the corresponding remote wavelength division optical link group 260. When all local wavelength division optical link groups 220 cannot 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 part of all local wavelength division optical link groups 220 cannot exchange service optical signals, and the main optical link 240 has no transmission failure. The transmission failure occurs at the first local wavelength division optical link group 221 that cannot exchange service optical signals or the corresponding first remote wavelength division optical link group 261.

[0100] In some possible implementations, S120 may include the following: Fig.12 Sub-operations of step S121-step S122 shown:

[0101] S121 . Detect a first electrical signal and a first leakage electrical signal from the local optical module assembly 210 within a first time.

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

[0103] For example, Figure 6 , Figure 7 As shown, when the remote communication device 3000 controls the remote optical module assembly 270 to send a first optical signal to the first remote uplink 261A, if the first electrical signal obtained according to the first optical signal can be output from the local optical module assembly 210 within the first time, it is proved that there is no transmission failure in both the first remote uplink 261A and the first local uplink 221A. At this time, the detection device X needs to perform the operation of step S122 to determine that the transmission failure occurs in the first remote downlink 261B or the first local downlink 221B.

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

[0105] For example, Figure 6 and Figure 7 As shown, when the local optical module assembly 210 does not integrate the OTDR detection function for the first local downlink 261B, and integrates the OTDR detection function for the second local downlink 222B of the second local wavelength division optical link group 222. The detection device X can respond to the first alarm information and control the local optical module assembly 210 to output the first detection optical signal to the first local downlink 221B within the second time after the first time. 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. According to the second leakage electrical signal, it can be determined that the first local downlink 221B can be transmitted normally.

[0106] For example, Figure 6 and Figure 7 As shown, when the local optical module assembly 210 does not integrate the OTDR detection function for the first local downlink 261B, and integrates the OTDR detection function for the second local downlink 222B of the second local wavelength division optical link group 222. If, within the second time, 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, it can be determined that the transmission fault occurs at the first local downlink 221B.

[0107] For example, Figure 6 and Figure 7 As shown, when the local optical module assembly 210 integrates the 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. At this time, in response to the first alarm information, when the first electrical signal is received from the local optical module assembly 210 within the first time, the local optical module assembly 210 is controlled to send a second detection optical signal to the first local downlink 221B within the second time after the first time. The first echo optical signal is obtained according to the second detection optical signal, and the first detection electrical signal corresponding to the first echo optical signal is OTDR detected, and the location of the transmission fault is determined according to the reflection peak position detected by the OTDR.

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

[0109] Exemplarily, when the first electrical signal is not received from the local optical module assembly 210 within the first time and the first leakage electrical signal is received, 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.

[0110] Exemplarily, when the first electrical signal and the first leakage electrical signal are not received from the local optical module assembly 210 within the first time, 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.

[0111] 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.

[0112] 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.

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

[0114] In an embodiment of the present application, when 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. The first optical signal can be sent through the remote communication device 3000. And at the detection device X at this end, a detection optical signal can be sent. According to the reception of the first optical signal and the detection optical signal by the local optical module assembly 210, the transmission fault at different locations is determined, and different fault indication signals are output according to the determination result to indicate that the corresponding location has a transmission fault.

[0115] Based on the above Figure 4 , Figure 5 , Fig. 9 , Fig.10 In the communication system 10000 of the structure shown, the uplink optical signal and the downlink optical signal are transmitted using the same link. Each wavelength division optical link group includes an uplink and downlink multiplexing link, through which the uplink optical signal and the downlink optical signal are transmitted. The following can be performed Fig.13 The second detection method shown includes steps S210 to S230:

[0116] S210 . In response to the first alarm information, control the local optical module assembly 210 to send a detection optical signal.

[0117] 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.

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

[0119] 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, the detection device X can control the local optical module component 210 to send a third detection optical signal to the first local uplink and downlink multiplexing link 221C. When the first local uplink and downlink multiplexing link 221C works normally, the local combiner / demultiplexer 230 can receive the third detection optical signal. Then the local optical module component 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 according to the filtered leakage optical signal of the third detection optical signal. Therefore, when the local optical module assembly 210 outputs the third leakage electrical signal, it 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.

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

[0121] Exemplarily, when the local optical module assembly 210 integrates 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 where the transmission fault occurs can be directly detected and determined based on the OTDR detection function.

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

[0123] Exemplarily, when the local optical module component 210 has not integrated 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 has integrated 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.

[0124] Exemplarily, when the local optical module component 210 has not integrated 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 has integrated 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.

[0125] Exemplarily, when the local optical module assembly 210 integrates the OTDR detection function for the first local uplink and downlink multiplexing link 221C of the first local wavelength division optical link group 221, the ninth fault indication signal is output based on the OTDR detection function. The ninth fault indication signal directly indicates the location where the transmission fault occurs on the first local uplink and downlink multiplexing link 221C, or the location where the transmission fault occurs on the first remote uplink and downlink multiplexing link 221C. For the description of the relevant technical principles and technical effects of the ninth fault indication signal, reference can be made to the relevant description of the fifth fault indication signal, which will not be repeated here.

[0126] In some possible implementations, in the above Fig.11 , Fig.12 and Fig.13 The detection method described may also include the following operation: stopping the exchange of service optical signals through the optical transmission path 2000. In some examples, such as Figure 4 , Figure 6 , Figure 7 and Fig. 9 The detection device X shown 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: respond to the first alarm information, stop the interactive service optical signal. Fig.10 As shown, the detection device X can be an optical monitoring device for performing optical signal transmission status detection and management set in the communication system 10000. 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.

[0127] 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 are unable to exchange service optical signals (not all local-end wavelength division optical link groups 220 are unable to exchange 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.

[0128] Based on the above Figure 4 , Figure 6 , Figure 7 , Fig. 9 and Fig.10 In the communication system 10000 of the structure shown in FIG. 1 , when all local wavelength division optical link groups 220 are unable to exchange service optical signals, the following Fig.14 The third control method shown includes steps S310 to S330:

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

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

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

[0132] 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 according to the second echo signal.

[0133] S330. Obtain an eighth fault indication signal according to the second detection electrical signal.

[0134] In an embodiment of the present application, the location where the transmission fault occurs can be determined based on the location 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.

[0135] In the embodiment of the present application, according to 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.

[0136] 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 / splitter, 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. Based on the characteristic that the detection accuracy of the OTDR detection function in the embodiment of the present application 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 according to the detection result, and output different fault indication signals 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, and conventional devices based on combiners / splitters to realize optical transmission can realize the detection of transmission faults, and cross-link detection of different optical links coupled to the combiner / splitter can be realized. 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.

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

[0138] 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.

[0139] 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.

[0140] Those of ordinary skill 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 to be beyond the scope of this application.

[0141] Those skilled in the art can 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.

[0142] In the several embodiments provided in the present 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 only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation, 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.

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

[0144] In addition, each functional module in each embodiment 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.

[0145] 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 a computer program instruction on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may 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 may be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or may contain one or more servers, data centers and other data storage devices that can be integrated with a medium. 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)).

[0146] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope 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 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; 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 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; 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 communication device to stop 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.

Images