CN117014070A

CN117014070A - Optical signal detection device, receiving device, transmission method and transmission system

Info

Publication number: CN117014070A
Application number: CN202210461585.1A
Authority: CN
Inventors: 胡隽; 丁洁; 刘委
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-04-28
Filing date: 2022-04-28
Publication date: 2023-11-07

Abstract

The embodiment of the application provides an optical signal detection device, a receiving device, a transmission method and a transmission system, which can be applied to optical transmission segment protection networks, optical multiplexing segment transmission protection networks, OCH protection transmission networks and other transmission networks of an optical transmission network. The optical signal detection device is used for being coupled to the output end of the first transmission channel, the first transmission channel is used for transmitting a first optical signal and a second optical signal, the first optical signal carries service information, and the second optical signal carries optical monitoring information; the optical signal detection device includes: a detection unit and a first control unit; the detection unit is used for acquiring the optical power of the first optical signal and the optical power of the second optical signal at the output end; the first control unit is used for: and determining whether the first transmission channel fails according to the optical power of the first optical signal and the optical power of the second optical signal.

Description

Optical signal detection device, receiving device, transmission method and transmission system

Technical Field

The present application relates to the field of communication signal transmission technologies, and in particular, to an optical signal detection device, a receiving device, a transmission method, and a transmission system.

Background

An optical transport network (Optical Transport Network, OTN) is a transport network based on wavelength division multiplexing technology in an optical layer packet network. The OTN network is divided into three layers according to functions: digital layers, optical channel layers, and media. The digital layer processes the electrical signals to form the electrical layer of the OTN network. The optical channel layer and the medium process optical signals to form an optical layer of the OTN network.

When an optical layer of an OTN network transmits an optical signal, the optical signal on a transmission line needs to be amplified by an optical signal amplifier. In actual transmission, the optical power is often reduced due to optical fiber interruption, degradation, flash and jitter, and the ratio of noise power introduced by the optical signal amplifier to total power after amplification is too large, so that even if the optical power of an input optical signal is reduced, the optical power of an optical signal finally output by the optical signal amplifier is not reduced obviously, and whether a transmission line fails cannot be accurately judged.

Disclosure of Invention

The embodiment of the application provides an optical signal detection device, a receiving device, a transmission method and a transmission system, which are used for improving the accuracy of transmission fault judgment.

In order to achieve the above purpose, the embodiment of the present application adopts the following technical scheme:

In a first aspect, an optical signal detection device is provided, where the optical signal detection device is configured to be coupled to an output end of a first transmission channel, where the first transmission channel is configured to transmit a first optical signal and a second optical signal, the first optical signal carrying service information, and the second optical signal carrying optical monitoring information; the optical signal detection device includes: a detection unit and a first control unit; the detection unit is used for acquiring the optical power of the first optical signal and the optical power of the second optical signal at the output end; the first control unit is used for: and determining whether the first transmission channel fails according to the optical power of the first optical signal and the optical power of the second optical signal. According to the embodiment, the first transmission channel on the transmission line is detected through the first optical signal and the second optical signal, so that the influence of noise introduced by the optical signal amplifier on fault detection is avoided.

In one possible embodiment, the first control unit is specifically configured to: if the optical power of the first optical signal is less than the optical power reference value of the first optical signal and the optical power of the second optical signal is less than the optical power reference value of the second optical signal, it is determined that the first transmission channel fails. If the first optical signal and the second optical signal are both reduced relative to the corresponding reference value of the optical power, the first transmission channel is judged to have a fault when an event which causes the optical power of the optical signal to be reduced is indicated to occur. The change states of the first optical signal and the second optical signal are respectively determined through the optical power reference value, so that the rapid judgment on whether the first transmission channel fails or not is realized.

In one possible embodiment, the first control unit is specifically configured to: if the optical power of the second optical signal is smaller than the optical power reference value of the second optical signal, the first transmission channel is determined to be faulty. The second optical signal is transmitted only through the first transmission channel, and the first transmission channel may be determined to be defective by the optical power of the second optical signal being reduced with respect to the optical power reference value of the second optical signal. The accuracy of judging whether the first transmission channel fails or not is highest through the combination of the states of the optical power of the first optical signal and the optical power of the second optical signal, but the judgment of whether the first transmission channel fails or not is carried out based on the optical power of the second optical signal alone.

In one possible embodiment, the first control unit is specifically configured to: if the optical power of the first optical signal is greater than or equal to the optical power reference value of the first optical signal, or if the optical power of the second optical signal is greater than or equal to the optical power reference value of the second optical signal, it is determined that the first transmission channel is not malfunctioning. If the first optical signal and the second optical signal do not drop relative to the corresponding optical power reference values, the current first transmission channel is indicated to have no event affecting the transmission of the optical signals.

In a possible embodiment, the first control unit is further configured to: and when the first transmission channel is determined to be faulty, sending indication information to the optical signal receiving device, wherein the indication information is used for indicating the first transmission channel to be faulty. And sending the indication information to inform the optical signal receiving device for receiving the optical signals subsequently, wherein the optical signal receiving device can take corresponding measures according to the fault condition of the transmission line. The optical signal receiving device is not required to additionally judge the fault state of the transmission line, the selection of the transmission line can be rapidly made according to the indication information, and meanwhile, the problem that the optical signal receiving device judges the optical power of the noise introduced into the transmission line, so that misjudgment is caused by noise interference is avoided.

In a possible embodiment, the indication information comprises a difference between an optical power reference value of the first optical signal and an optical power of the first optical signal, or/and comprises a difference between an optical power reference value of the second optical signal and an optical power of the second optical signal. The difference between the optical power reference value of the first optical signal and the optical power of the first optical signal and the difference between the optical power reference value of the second optical signal and the optical power of the second optical signal represent the degree of optical signal insertion loss. Either one of the two is sent to the optical signal receiving device, and the optical signal receiving device can make corresponding measures according to the degree of the insertion loss of the optical signal. In practical application, due to reasons such as device arrangement and application scene, the first optical signal and the second optical signal may be different from each other in terms of difficulty in acquiring, monitoring and the like, and one optical signal which is relatively easy to acquire and monitor may be selected as an optical signal for judging the insertion loss of the optical signal according to practical application.

In a possible embodiment, the indication information further comprises an identification of the first transmission channel. The first transmission channel with the fault is positioned through the identification, so that the follow-up maintenance and repair are facilitated, the difficulty of finding the fault position is reduced, and the follow-up maintenance progress is improved.

In one possible embodiment, the reference value of the optical power of the first optical signal is an average value of the optical power of the first optical signal within a preset time; the reference value of the optical power of the second optical signal is an average value of the optical power of the second optical signal within a preset time. In this case, the optical power of the current optical signal is lower than the optical power reference value, and it can be determined that the corresponding first transmission channel has failed.

In some possible embodiments, the reference value of the optical power of the first optical signal is an average value of the optical power of the first optical signal minus the first value in a preset time; the reference value of the optical power of the second optical signal is an average value of the optical power of the second optical signal minus the second value within a preset time. In this case, the optical power of the current optical signal is not only lower than the optical power reference value, but also needs to be lower than the optical power reference value to some extent to determine that the corresponding first transmission channel fails. The reference value of the optical power is set as a value obtained by subtracting a certain value from the average value of the optical power, so that the judgment of whether the optical signal is lower than the certain value of the average value of the optical signal can be rapidly realized.

In some possible embodiments, the detection unit comprises a second optical monitoring device; the second optical monitoring device is configured to obtain an optical power of the second optical signal at the output end. And receiving the second optical signal transmitted on the first transmission channel through the second optical monitoring equipment, and obtaining the optical power of the second optical signal.

In some possible embodiments, a first optical signal monitoring device is coupled to the input of the first transmission channel; the first optical signal monitoring device is used for inputting a second optical signal to the first transmission channel; the second optical signal monitoring device is used for: receiving a second optical signal transmitted on the first transmission channel, and acquiring optical power and optical monitoring information of the second optical signal; the first control unit is used for acquiring the optical power and the optical monitoring information of the second optical signal from the second optical signal monitoring equipment.

In a possible embodiment, the detection unit further comprises an optical power amplifier; the optical power amplifier is used for acquiring the optical power of the first optical signal at the output end. The optical power of the first optical signal is obtained by adopting the existing optical power amplifier on the transmission line, so that excessive interference to the transmission of the first optical signal caused by the arrangement of excessive devices on the transmission line is avoided.

In one possible implementation, the second optical signal detector is a second optical signal monitoring device; the second optical signal monitoring device is used for acquiring the optical power of the second optical signal at the output end. The optical power of the second optical signal is acquired by adopting the existing devices, so that excessive interference to the transmission of the first optical signal caused by the arrangement of excessive devices on the transmission line is avoided.

In a second aspect, an optical line protection unit and a second control unit of an optical signal receiving apparatus are provided; the optical line protection unit is used for receiving the first optical signals transmitted by the first transmission branch and the second transmission branch; the first transmission branch comprises at least one first transmission channel, and the first optical signal carries service information; the second control unit is used for receiving indication information from the optical signal detection device, and the indication information is used for indicating that the first transmission channel fails; the second control unit is further configured to instruct the optical line protection unit to selectively transmit one of the first optical signal on the first transmission branch and the first optical signal on the second transmission branch according to the instruction information. The optical signal receiving device selects one of the first optical signal on the first transmission branch and the first optical signal on the second transmission branch to a subsequent device which needs to receive the first optical signal according to the judgment of the fault problem of the transmission line by the optical signal detecting device.

In one possible embodiment, the indication information includes a difference between an optical power reference value of the first optical signal and an optical power of the first optical signal.

In one possible embodiment, the first transmission channel is further used for transmitting the second optical signal; the second optical signal carries optical monitoring information, and the indication information includes a difference between an optical power reference value of the second optical signal and an optical power of the second optical signal.

In one possible embodiment, the indication information comprises an identification of the failed first transmission channel.

In one possible embodiment, the second control unit instructs the optical line protection unit to select to transmit the first optical signal on the second transmission branch when the first transmission channel of the first transmission branch fails.

In one possible embodiment, the second transmission branch comprises at least one second transmission channel; when the first transmission channel and the second transmission channel are both failed, the second control unit instructs the optical line protection unit to select the first optical signal with high transmission optical power.

In a third aspect, an optical signal transmission method is provided and applied to an optical signal detection device, where the optical signal detection device is configured to be coupled to an output end of a first transmission channel, and the first transmission channel is configured to transmit a first optical signal and a second optical signal, where the first optical signal carries service information, and the second optical signal carries optical monitoring information; the method comprises the following steps: the optical signal detection device acquires the optical power of the first optical signal and the optical power of the second optical signal at the output end; the optical signal detection device determines whether the first transmission channel fails according to the optical power of the first optical signal and the optical power of the second optical signal.

In one possible implementation manner, determining whether the first transmission channel fails according to the optical power of the first optical signal and the optical power of the second optical signal specifically includes:

the first control unit determines that the first transmission channel fails if the optical power of the first optical signal is less than the optical power reference value of the first optical signal and the optical power of the second optical signal is less than the optical power reference value of the second optical signal.

In one possible implementation manner, determining whether the first transmission channel fails according to the second optical power specifically includes:

the first control unit determines that the first transmission channel fails if the optical power of the second optical signal is smaller than the optical power reference value of the second optical signal.

the first control unit determines that the first transmission channel is not malfunctioning if the optical power of the first optical signal is greater than or equal to the optical power reference value of the first optical signal, or if the optical power of the second optical signal is greater than or equal to the optical power reference value of the second optical signal.

In one possible embodiment, the method further comprises:

when the first transmission channel is determined to be faulty, the optical signal detection device sends indication information to the optical signal receiving device, wherein the indication information is used for indicating the first transmission channel to be faulty.

In one possible embodiment, the indication information includes a difference between an optical power reference value of the first optical signal and an optical power of the first optical signal, or includes a difference between an optical power reference value of the second optical signal and an optical power of the second optical signal.

In one possible embodiment, the indication information further includes: identification of the failed first transmission channel.

In one possible embodiment, the reference value of the optical power of the first optical signal is an average value of the optical power of the first optical signal minus the first value in a preset time; the reference value of the optical power of the second optical signal is an average value of the optical power of the second optical signal minus the second value within a preset time.

In one possible embodiment, the reference value of the optical power of the first optical signal is an average value of the optical power of the first optical signal within a preset time; the reference value of the optical power of the second optical signal is an average value of the optical power of the second optical signal within a preset time.

In a fourth aspect, an optical signal transmission method is provided and applied to an optical signal receiving device, where the optical signal receiving device is configured to receive a first optical signal transmitted by a first transmission branch and a second transmission branch; the first transmission branch comprises at least one first transmission channel, and the first optical signal carries service information; the method comprises the following steps: the optical signal receiving device receives indication information from the optical signal detecting device, wherein the indication information is used for indicating that the first transmission channel fails; the optical signal receiving device selects one of the first optical signal on the first transmission branch and the first optical signal on the second transmission branch to be transmitted based on the instruction information.

In one possible embodiment, the first transmission channel is further used for transmitting the second optical signal; the second optical signal carries optical monitoring information, and the indication information includes a difference between an optical power reference value of the second optical signal and an optical power of the first optical signal.

In one possible embodiment, the indication information includes: identification of the failed first transmission channel.

In a fifth aspect, an optical signal transmission system is provided, which includes a first transmission branch, a second transmission branch, at least one optical signal detection device as described in the first aspect, and at least one optical signal receiving device as described in the second aspect; the first transmission branch comprises at least one first transmission channel; the optical signal detection device is used for detecting whether the first transmission channel fails, and the optical signal receiving device is used for receiving the optical signals on the first transmission branch and the second transmission branch and selecting one of the first optical signal on the first transmission branch and the optical signal on the second transmission branch to send.

In a sixth aspect, a system on a chip is provided. The system-on-chip includes at least one processor and at least one interface circuit. The at least one processor and the at least one interface circuit may be interconnected by wires. The processor is configured to enable the electronic device to perform the functions or steps of the above-described method embodiments, and at least one interface circuit may be configured to receive signals from other devices (e.g., memory) or to transmit signals to other devices (e.g., communication interfaces). The system-on-chip may include a chip, and may also include other discrete devices.

In a seventh aspect, a computer readable storage medium is provided, the computer readable storage medium comprising instructions which, when run on an electronic device as described above, cause the electronic device to perform the functions or steps of the method embodiments described above, e.g. the methods described in the third and fourth aspects above.

In an eighth aspect, there is provided a computer program product comprising instructions which, when run on an electronic device as described above, cause the electronic device to perform the functions or steps of the method embodiments described above, for example the methods described in the third and fourth aspects above.

Technical effects concerning the second, third, fourth, fifth, sixth, seventh and eighth aspects are described with reference to the technical effects of the foregoing first aspect.

Drawings

Fig. 1 is a schematic structural diagram of an optical signal transmission system according to an embodiment of the present application;

fig. 2 is a schematic structural diagram of another optical signal transmission system according to an embodiment of the present application;

fig. 3 is a schematic structural diagram of another optical signal transmission system according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of an optical signal detection device according to an embodiment of the present application;

Fig. 5 is a schematic structural diagram of another optical signal detecting device according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of another optical signal transmission system according to an embodiment of the present application;

fig. 7 is a schematic workflow diagram of an optical signal transmission method according to an embodiment of the present application;

fig. 8 is a schematic diagram of a method for determining an optical power reference value according to an embodiment of the present application.

Detailed Description

It should be noted that the terms "first," "second," and the like in the embodiments of the present application are used for distinguishing between similar features and not necessarily for indicating a relative importance, quantity, or sequence.

The terms "exemplary" or "such as" and the like, as used in relation to embodiments of the present application, are used to denote examples, illustrations, or descriptions. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

The terms "coupled" and "connected" in accordance with embodiments of the application are to be construed broadly, and may refer, for example, to a physical direct connection, or to an indirect connection via electronic devices, such as, for example, electrical resistance, inductance, capacitance, or other electrical devices.

Some concepts to which the present application relates will be first described:

An optical signal amplifier is a device that amplifies an optical signal on a transmission line when the optical layer of an OTN network transmits the optical signal. Before the optical signal amplifier appears, a repeater is required to be arranged on a transmission line at a certain distance, and the optical signal is subjected to photoelectric conversion by the repeater to generate an electric signal, and then is subjected to photoelectric conversion to regenerate the optical signal and transmit. The optical signal amplifier directly amplifies the optical signal without photoelectric conversion, and the method is the most effective method for supplementing the optical fiber loss in the transmission process, solves the limitation of optical signal attenuation on the transmission rate and the distance of an OTN network, and realizes ultra-high speed, ultra-large capacity, ultra-long distance wavelength division transmission, dense wavelength division transmission, all-optical transmission, optical soliton transmission and the like.

In optical fiber transmission, faults may occur, including problems of optical fiber interruption, optical fiber degradation, optical fiber flashover, optical fiber jitter, and the like. The optical fiber interruption refers to the problem that the optical fiber is interrupted by the influence of external force or the optical fiber connector is disconnected, so that the transmission of optical signals is interrupted. The degradation of the optical fiber is a problem of abnormal attenuation of the optical fiber caused by bending of the optical fiber, abnormal connection of the optical fiber connector or the flange plate, dirt or loss of the end face of the optical fiber, poor quality of the fusion joint of the optical fiber and the like. Fiber flashover refers to the problem that the optical power of an optical signal transmitted on an optical fiber drops by more than 10dB, and the duration is in the millisecond level, resulting in automatic recovery after 1-10 seconds of interruption of the optical signal transmission service, which may generate an optical signal loss alarm. The optical fiber jitter refers to the problem that the optical power of an optical signal transmitted on an optical fiber is reduced by more than 3dB, so that the optical signal is automatically recovered after 1-10 seconds of optical signal transmission service error code, but the optical power of the optical signal is reduced again by more than 3dB, and in the process, no optical signal loss alarm occurs, but the switching threshold value for switching transmission channels is possibly reached.

The embodiment of the application provides an optical signal transmission system, as shown in fig. 1, which comprises an optical signal transmitting device 100, a transmission line 200 and an optical signal receiving device 300; at least one optical signal amplifier 520 is disposed on the transmission line 200; the optical signal transmitting apparatus 100 is configured to receive an optical signal transmitted from the outside and transmit the optical signal to the optical signal receiving apparatus 300 through the transmission line 200; the optical signal amplifier 520 is configured to perform signal amplification processing on the optical signal transmitted on the transmission line 200; the optical signal receiving apparatus 300 is used to transmit an optical signal received from the transmission line 200 to a subsequent device that needs to receive the optical signal.

During this transmission, if the transmission line 200 fails, the optical power of the optical signal transmitted on the transmission line 200 may be reduced or the transmission line 200 may interrupt transmitting the optical signal.

As shown in fig. 2, the optical signal transmission system includes an optical signal transmitting device 100, a transmission line 200, and an optical signal receiving device 300; the transmission line 200 includes a first transmission branch 210 and a second transmission branch 220; at least one first optical signal amplifier 521 is arranged on the first transmission branch 210 and at least one second optical signal amplifier 522 is arranged on the second transmission branch 220; the optical signal receiving apparatus 300 includes an optical signal protection unit 310.

The optical signal transmitting apparatus 100 is configured to split a received optical signal transmitted from the outside into two paths, and transmit the optical signal to the optical signal receiving apparatus 300 through the first transmission branch 210 and the second transmission branch 220, respectively; the first optical signal amplifier 521 is configured to perform signal amplification processing on the optical signal on the first transmission branch 210, and the second optical signal amplifier 522 is configured to perform signal amplification processing on the optical signal on the second transmission branch 220; the optical signal receiving apparatus 300 is configured to obtain optical powers of the optical signals transmitted by the first transmission branch 210 and the second transmission branch 220, and select an optical signal with a high optical power to send to a subsequent device that needs to receive the optical signal.

Illustratively, the first optical signal amplifier 521 and the second optical signal amplifier 522 may be rare earth doped optical amplifiers, semiconductor optical amplifiers, nonlinear effect optical amplifiers, or the like; rare earth doped optical amplifiers include erbium doped fiber amplifiers, praseodymium doped fiber amplifiers, thulium doped fiber amplifiers, erbium doped waveguide optical amplifiers, and the like.

Illustratively, in the optical signal receiving apparatus 300, the optical signal protection unit 310 is configured to receive the optical signals transmitted by the first transmission branch 210 and the second transmission branch 220, and switch and select, based on the optical power of the received optical signals, the optical signal on one of the branches to send to a device that needs to receive the optical signal subsequently.

Illustratively, the optical signal protection unit 310 employs a signal protection veneer (Optical Line Protection, OLP); the OLP is configured to receive the optical signals transmitted by the first transmission branch 210 and the second transmission branch 220, and switch and select, based on the optical power of the received optical signals, an optical signal on one of the branches to be sent to a device that needs to receive the optical signal subsequently; meanwhile, the OLP is further configured to detect the optical power variation of the optical signals on all the branches, and when the optical power of the optical signal on the current branch drops by a certain value, the OLP is switched to send the optical signals on other branches to a device that needs to receive the optical signals subsequently.

In some embodiments, as shown in fig. 3, the optical signal transmitting apparatus 100 includes an optical line transmitting unit 110, where the optical line transmitting unit 110 is configured to split a received optical signal transmitted from the outside into two paths, and transmit the optical signal to the optical signal receiving apparatus 300 through the first transmission branch 210 and the second transmission branch 220, respectively.

Illustratively, a signal protection board (Optical Line Protection, OLP) is selected as the optical line transmitter unit 110.

In actual transmission operation, the optical power of the transmitted optical signal is often reduced due to faults such as fiber interruption, degradation, flashing, and jitter. And the optical signal amplifier 520 may introduce noise during the signal amplification process of the transmitted optical signal. Such noise introduced into the optical signal is unrecognizable by the OLP in the optical signal receiving apparatus 300. If the ratio of the introduced noise power to the total power of the amplified optical signal is too large, even if the optical power of the optical signal input to the optical signal amplifier 502 is reduced, the optical power of the optical signal finally output by the optical signal amplifier 520 is not reduced significantly, so that the optical signal protection unit 310 cannot accurately determine whether the transmission line 200 is faulty. This problem is more pronounced when the optical signal amplifier 520 is a plurality of cascades. In the case where a plurality of optical signal amplifiers 520 are cascaded, a fault occurs in a certain position of the transmission line 200, resulting in a drop in optical power of the optical signal; the plurality of optical signal amplifiers 520 at the fault location introduce noise when performing signal amplification processing on the optical signal; when the optical signal amplified by the cascaded optical signal amplifier 520 is transmitted to the OLP of the optical signal receiving apparatus 300, the OLP detects no or insignificant drop in the optical power of the received optical signal. The actual optical power of the optical signal may have been attenuated too much and even a signal loss has occurred.

Therefore, the embodiment of the application provides an optical signal transmission system; as shown in fig. 3, the optical signal transmission apparatus 100, the first transmission branch 210, the second transmission branch 220, the first optical monitoring device 531, the second optical monitoring device 532, the optical signal reception apparatus 300, and the optical signal detection apparatus 400 are included. The optical signal transmitting apparatus 100 is configured to divide a received first optical signal transmitted from the outside into two paths, and transmit the first optical signal to the optical signal receiving apparatus 300 through the first transmission branch 210 and the second transmission branch 220, where the optical signal receiving apparatus 300 is configured to select one path from the two paths of received first optical signals to send to a subsequent device that needs to receive the first optical signal. The first transmission branch 210 comprises at least one first transmission channel 211; the first optical monitoring device 531 is coupled to the input end of the first transmission channel 211, and is configured to send the second optical signal to the first transmission channel 211; the second optical monitoring device 532 is coupled to the output end of the first transmission channel 211, and is configured to receive the second optical signal transmitted by the first transmission channel 211. The first optical signal carries service information, and the second optical signal carries optical monitoring information. The optical signal detecting device 400 is coupled to the output end of the first transmission channel 211, and is configured to obtain the optical power of the first optical signal and the optical power of the second optical signal at the output end of the first transmission channel 211, and determine whether the first transmission channel 211 fails according to the optical power of the first optical signal and the optical power of the second optical signal.

Illustratively, as shown in fig. 3, by dividing the first transmission branch 210 into at least one first transmission channel 211, the first transmission channel 211 is detected by the optical signal detection device 400. The first optical signal is split into two paths by the optical signal transmitting apparatus 100, and is input into the first transmission branch 210 and the second transmission branch 220, respectively, and output from the output ends of the first transmission branch 210 and the second transmission branch 220 to the optical signal receiving apparatus 300; the second optical signal is input from the input end of the first transmission channel 211, flows through the first transmission channel 211, and is output from the output end of the first transmission channel 211. For one first transmission channel 211 detected by the optical signal detection device 400, the optical signal detection device 400 acquires the optical power of the first optical signal and the optical power of the second optical signal at the output end of the first transmission channel 211. If the optical signal detecting apparatus 400 detects a drop in the optical power of the first optical signal, it is determined that a fault affecting the transmission of the optical signal has occurred in the first transmission branch 210. If the optical signal detecting apparatus 400 detects that the optical power of the second optical signal is reduced, or the optical power of the second optical signal and the optical power of the first optical signal are both reduced, it is determined that a failure affecting the transmission of the optical signal occurs in the first transmission channel 211 corresponding to the second optical signal.

In the optical signal transmission system shown in fig. 3, the deployed transmission line 200 is not modified, and the problem of increasing the optical signal insertion loss in the transmission process of the optical signal due to the addition of a transmission device does not occur. Meanwhile, by segmenting the first transmission branch 210 into at least one first transmission channel 211 for detection, the problem that the optical signal receiving device 300 cannot accurately identify whether the first transmission branch 210 fails or not due to noise introduced when the optical signal amplifier 502 amplifies the optical signal is avoided.

Illustratively, the first optical signal and the second optical signal are optical signals of different wavelengths.

The first optical signal and the second optical signal are illustratively transmitted on different channels of the first transmission channel.

Illustratively, the first optical supervisory device 531 and the second optical supervisory device 532 are both optical supervisory channel network devices (Optical Supervisory Channel, OSC).

In some embodiments, the optical signal transmission system further comprises a first and a second demultiplexer. The first optical monitoring device 531 is coupled to the input of the first transmission channel 211 via a first demultiplexer. The second optical monitoring device 532 is coupled to the output end of the first transmission channel 211 through a second wave-splitting and wave-combining device.

Illustratively, the first and second demultiplexer may employ a fiber interface unit (Fiber Interface Unit, FIU).

In some embodiments, as shown in fig. 4, the optical signal detection apparatus 400 includes: a detection unit 410 and a first control unit 420; the detection unit 410 is configured to obtain an optical power of the first optical signal and an optical power of the second optical signal at the output end of the first transmission channel 211; the first control unit 420 is configured to: it is determined whether the first transmission channel 211 is malfunctioning based on the optical power of the first optical signal and the optical power of the second optical signal.

In some embodiments, the detection unit 410 includes a first optical signal detector and a second optical signal detector. The first optical signal detector is used for acquiring the optical power of the first optical signal at the output end of the first transmission channel 211, and the second optical signal detector is used for acquiring the optical power of the second optical signal at the output end of the first transmission channel 211.

The first optical signal detector may be a separately provided device for acquiring optical power of the first optical signal, for example.

Illustratively, the first optical signal detector may employ a first optical signal amplifier 521.

As shown in fig. 5, when the first optical signal amplifier 521 is used as a device for obtaining the optical power of the first optical signal, when the first optical signal amplifier 521 amplifies the transmitted first optical signal, the optical power of the first optical signal can be fed back by the parameters such as the amplification gain of the first optical signal amplifier 521, and at this time, the first optical signal amplifier 521 only needs to send the parameters to the first control unit 420, and the first control unit 420 can obtain the optical power of the current first optical signal. By adopting the first optical signal amplifier 521 as the first optical signal detector, not only the optical power can be accurately fed back, but also the cost for setting additional devices can be reduced. In addition, the complexity of the system is reduced, and the interference on the transmission of the first optical signal caused by the arrangement of too many devices is reduced.

The second optical signal detector may be a separately provided device for acquiring optical power of the second optical signal, for example.

Illustratively, the second optical signal detector may employ a second optical monitoring device 532.

As shown in fig. 5, when the second optical monitoring device 532 is used as a device for acquiring the optical power of the second optical signal, the second optical monitoring device 532 located at the output end of the first transmission channel 211 may obtain the optical power of the second optical signal after receiving the second optical signal. Therefore, the optical power of the second optical signal obtained by the second optical monitoring device 532 is directly sent to the first control unit 420, which can also reduce the cost of additional devices and reduce the complexity of the system and the influence on the optical signal transmission.

In some embodiments, the first control unit 420 is configured to:

if the optical power of the first optical signal is smaller than the optical power reference value of the first optical signal, it is determined that the optical signal insertion loss occurs in the first transmission branch 210, and it is determined that the first transmission branch 210 fails.

If the optical power of the second optical signal is smaller than the optical power reference value of the second optical signal, or if the optical power of the first optical signal is smaller than the optical power reference value of the first optical signal and the optical power of the second optical signal is smaller than the optical power reference value of the second optical signal, it is determined that the current first transmission channel 211 has the optical signal insertion loss, and it can be determined that the current first transmission channel 211 has the fault.

If the optical power of the first optical signal at the output end of the first transmission channel 211 is greater than or equal to the optical power reference value of the first optical signal and the optical power of the second optical signal is greater than or equal to the optical power reference value of the second optical signal, it is determined that the first transmission branch 210 and the first transmission channel 211 are not malfunctioning.

Since the first optical signal flows through the entire first transmission branch 210, when the optical power of the first optical signal obtained at the output end of the first transmission channel 211 decreases, it is verified that a fault occurs at a certain position of the first transmission branch 210. The second optical signal only flows through one corresponding first transmission channel 211, so that when the optical power of the second optical signal obtained at the output end of the first transmission channel 211 decreases, it can be proved that the current first transmission channel 211 has a fault.

The reference value of the optical power of the first optical signal is an average value of the optical power of the first optical signal in a preset time; the reference value of the optical power of the second optical signal is an average value of the optical power of the second optical signal within a preset time.

In this case, the first control unit 420 may determine that the first transmission branch 210 has failed as long as the optical power of the first optical signal is lower than the average value of the optical powers of the first optical signals; the first control unit 420 may determine that the first transmission channel 211 is malfunctioning as long as the optical power of the second optical signal is lower than the average value of the optical power of the second optical signal.

The reference value of the optical power of the first optical signal is an average value of the optical power of the first optical signal within a preset time minus a first value; the reference value of the optical power of the second optical signal is the average value of the optical power of the second optical signal within the preset time minus the second value.

In this case, the optical power of the first optical signal needs to be lower than the average value of the optical power of the first optical signal, and the difference between the average value of the optical power of the first optical signal and the optical power of the first optical signal is greater than the first value, the first control unit 420 may determine that the first transmission branch 210 has failed; the optical power of the second optical signal needs to be lower than the average value of the optical power of the second optical signal, and the difference between the average value of the optical power of the second optical signal and the optical power of the second optical signal is greater than the second value, the first control unit 420 may determine that the first transmission channel 211 is failed.

In some embodiments, as shown in fig. 3 and 5, the first optical signal amplifier 521 is configured to perform signal amplification processing on the transmitted first optical signal, and transmit the optical power of the first optical signal input to the first optical signal amplifier 521 to the first control unit 420. The first optical monitoring device 531 located at the input end of the first transmission channel 211 is used for inputting the second optical signal to the first transmission channel 211; the second optical monitoring device 532 located at the output end of the first transmission channel 211 is configured to receive the second optical signal, obtain the optical power of the second optical signal, and send the optical power to the first control unit 420. The first control unit 420 is configured to receive an optical power of the first optical signal and an optical power of the second optical signal; and obtains the difference between the optical power reference value of the first optical signal and the optical power of the first optical signal and the difference between the optical power reference value of the second optical signal and the optical power of the second optical signal, and then judges whether the first transmission channel 211 is faulty. The first control unit 420 is configured to transmit the indication information to the optical signal receiving apparatus 300 if the first transmission channel 211 fails. The indication information is used to indicate that the first transmission channel 211 is malfunctioning.

In some embodiments, transmission of the instruction information may be performed between the first control units 420, and between the first control units 420 and the optical signal receiving apparatus 300, by a wireless transmission device or the like. In some embodiments, transmission of the instruction information may be performed through the OSC between the first control units 420, and between the first control units 420 and the optical signal receiving apparatus 300.

Illustratively, as shown in fig. 3 and 5, between the first control units 420, the first control unit 420 corresponding to the first transmission channel 211 of the upper stage of the cascade transmits the instruction information to the first optical monitoring device 531 at the input end of the first transmission channel 211 of the lower stage of the cascade; after receiving the indication information, the first optical monitoring device 531 at the input end of the first transmission channel 211 of the next stage in cascade carries the indication information on the second optical signal, and sends the indication information to the first control unit 420 of the next stage in cascade through the first transmission channel 211 of the next stage in cascade.

The first control unit 420 at the last stage among the cascaded first control units 420 may transmit the instruction information to the optical signal receiving apparatus 300 through a wireless transmission device, or may transmit the instruction information through the OSC. When the interactive information transmission is performed between the first control unit 420 and the optical signal receiving apparatus 300 through the OSC, as shown in fig. 3, it is necessary to provide a second optical monitoring device 532 in the optical signal receiving apparatus 300, and the interactive information transmitted from the second control unit 420 is received through the second optical monitoring device 532 provided in the optical signal receiving apparatus 300; the second optical monitoring device 532 of the light type number receiving apparatus 300 transmits the received interactive information to the second control unit 320.

In the process of transmitting the first optical signal, the interactive information for the transmission process is transmitted through the second optical signal, but not through the first optical signal. The interaction information comprises optical monitoring information and indication information; the optical monitoring information includes status information of each module of the optical transmission system in operation, and status information of the first optical signal when transmitted on each first transmission channel 211. The second optical signal is independent of the first optical signal, and transmission using the second optical signal does not interfere with the first optical signal. When the second optical monitoring device 532 receives the second optical signal, the optical power of the second optical signal can be obtained in real time through the optical power detection module provided in the second optical monitoring device 532. At the same time, the second optical monitoring device 532 may also extract the interaction information carried on the second optical signal. In the transmission process, the service information is always carried on the first optical signal to be transmitted in an optical form; the interactive information is firstly converted from the form of an electric signal into an optical signal to be borne on a second optical signal, and is transmitted in the form of light on the first transmission channel 211, and after entering the second optical monitoring device 532 at the output end of the first transmission channel 211, the second optical signal is terminated; and the interactive information carried on the second optical signal is extracted by the second optical monitoring device 532, reconverted into the form of an electrical signal and sent to the first control unit 420. And for the interactive information which is wanted to be sent by the first control unit 420 and other devices, the form of the electric signal is converted into the optical signal again, and the optical signal is carried on the second optical signal and is transmitted through the first transmission channel 211.

Illustratively, the first optical supervisory device 531 and the second optical supervisory device 532 both employ OSC. The OSC carries the interworking information on the second optical signal for transmission in the form of E1 frame overhead slots. One E1 frame contains 32 slots from 0-31. The definition and functional description of each time slot are shown in table 1 below:

table 1 E1 frame slot definition and functional description

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The OSC adopts two modes, namely an overhead mode and a message mode, of carrying the interactive information on the second optical signal in the form of an E1 frame overhead time slot for transmission, wherein: the overhead mode refers to that the OSC configures a transmission channel separately by using a time slot as a reserved byte in the E1 frame as indication information, and transmits the interactive information in the form of overhead through the separately configured transmission channel. The message mode refers to that the interactive information is transmitted in the form of a message through a time slot serving as a universal DCC channel in an E1 frame, namely, the interactive information is transmitted through D1-D12 bytes corresponding to time slots 3-13 and 15.

The method has the advantages of good timeliness and quick transmission. But has the disadvantage of monopolizing one overhead slot. The interactive information is transmitted by using a message mode, so that the method has the advantages of multiplexing the prior DCC channel time slot, not additionally occupying the time slot, and the disadvantage of insufficient timeliness of message transmission. The selection can be performed in two transmission modes according to actual application conditions.

In some embodiments, as shown in fig. 6, the second transmission branch 220 includes at least one second transmission channel 221, and the optical signal detecting device 400 is configured to detect the second transmission channel 221, so as to determine whether a fault affecting optical signal transmission occurs on the second transmission channel 221. A first optical monitoring device 531 is coupled to the input of the second transmission channel 221 and a second optical monitoring device 532 is coupled to the output of the second transmission channel 221. The first optical monitoring device 531 is configured to input a second optical signal to the second transmission channel, and the second optical monitoring device 532 is configured to receive the second optical signal.

For the details of the second transmission channel 221 and the corresponding optical signal detecting device 400, the first optical monitoring device 531, and the second optical monitoring device 532 on the second transmission branch 220, reference may be made to the description of the first transmission channel 211 and the corresponding optical signal detecting device 400, the first optical monitoring device 531, and the second optical monitoring device 532 on the first transmission branch 210, which are not described herein.

In some embodiments, as shown in fig. 3, the optical signal receiving apparatus 300 includes an optical line protection unit 310 and a second control unit 320; the optical line protection unit 310 is configured to receive the first optical signals transmitted by the first transmission branch 210 and the second transmission branch 220; the first optical signal carries service information; the second control unit 320 is configured to receive the interaction information from the optical signal detection device 400; the interaction information includes optical monitoring information and indication information, and instructs the optical line protection unit 310 to select one of the first optical signal on the first transmission branch 210 and the first optical signal on the second transmission branch 220 to send to a subsequent device that needs to receive the first optical signal according to the indication information.

The indication information includes, for example, a difference between an optical power reference value of the first optical signal and an optical power of the first optical signal.

The optical signal receiving apparatus is configured to 300 receive the first optical signals on the first transmission branch 210 and the second transmission branch 220, and send the first optical signals on the first transmission branch 210 to a subsequent device that needs to receive the first optical signals. In this process, the detecting device 400 is used to detect whether the first transmission channel 211 is malfunctioning. When it is determined that the first transmission channel 211 fails, the instruction information is transmitted to the second control unit 320 of the optical signal receiving apparatus 300. When the second control unit 320 receives the indication information, it determines whether the first optical signal on the second transmission branch 220 needs to be selected to be sent to a subsequent device that needs to receive the first optical signal according to whether the difference between the optical power reference value of the first optical signal and the optical power of the first optical signal included in the indication information exceeds a certain threshold.

The indication information includes, for example, a difference between an optical power reference value of the second optical signal and an optical power of the second optical signal.

When the second control unit 320 receives the indication information, it determines whether the first optical signal on the second transmission branch 220 needs to be selected and sent to a subsequent device that needs to receive the first optical signal according to whether the difference between the optical power reference value of the second optical signal and the optical power of the second optical signal included in the indication information exceeds a certain threshold.

Illustratively, the indication information includes an identification of the failed first transmission channel 211.

When the optical signal receiving apparatus 300 receives the indication information, the identification of the first transmission channel 211 is identified, that is, the first transmission channel 211 having the fault on the first transmission branch 210 can be located and notified.

In some embodiments, when the optical signal detection device 400 is disposed on the first transmission branch 210, the second control unit 320 is configured to:

if the first transmission channel 211 on the first transmission branch 210 fails, the optical line protection unit 310 is instructed to select the first optical signal on the second transmission branch 220 to be transmitted to a subsequent device that needs to receive the first optical signal.

If the first transmission channel 211 on the first transmission branch 210 fails, the optical line protection unit 310 is instructed to keep sending the first optical signal on the first transmission branch 210 to a subsequent device that needs to receive the first optical signal.

In some embodiments, when the optical signal detection device is disposed on both the first transmission branch 210 and the second transmission branch 220:

if the first transmission channel 211 on the first transmission branch 210 fails and the second transmission channel 221 on the second transmission branch 220 does not fail, the optical line protection unit 310 is instructed to select to send the first optical signal on the second transmission branch 220 to a subsequent device that needs to receive the first optical signal.

If the first transmission channel 211 on the first transmission branch 210 fails and the second transmission channel 221 on the second transmission branch 220 also fails, the optical line protection unit 310 is instructed to select the first optical signal with high optical power to the subsequent device that needs to receive the first optical signal.

Illustratively, when the first transmission path 211 on the first transmission branch 210 and the second transmission branch 220 fail, the optical power representing the first optical signals on the first transmission branch 210 and the second transmission branch 220 is reduced, and the optical line protection unit 310 selects a first optical signal with high optical power to send to a subsequent device that needs to receive the first optical signal.

In some embodiments, the Optical signal transmitting apparatus 100 and the Optical signal receiving apparatus 300 constitute an Optical transmission segment protection network (Optical transmission section, OTS), an Optical multiplexing segment transmission protection network (Optical multiplex section, OMS), or an OCH protection transmission network (OCH).

The process of transmitting data by the above-described transmission system is exemplarily described below by an optical signal transmission method as shown in fig. 7, which includes the steps of:

s101, an optical signal transmission system transmits an optical signal.

Illustratively, as shown in fig. 7, the optical signal transmitting apparatus 100 receives a first optical signal transmitted from the outside and divides the first optical signal into two paths, and transmits the first optical signal to the optical signal receiving apparatus 300 through the first transmission branch 210 and the second transmission branch 220, respectively; after receiving the two paths of first optical signals, the optical signal receiving apparatus 300 sends the first optical signals transmitted by the first transmission branch 210 to a subsequent device that needs to receive the first optical signals.

S102, the optical signal detection apparatus 400 obtains the optical power of the first optical signal and the optical power of the second optical signal.

Illustratively, as shown in fig. 3, the optical signal detecting apparatus 400 acquires the optical power of the first optical signal and the optical power of the second optical signal at the output end of the first transmission channel 211.

S103, the optical signal detection apparatus 400 determines whether the first transmission channel 211 is faulty according to the acquired optical power of the first optical signal and the acquired optical power of the second optical signal.

Illustratively, as shown in fig. 3, on a first transmission branch 210 for transmitting the first optical signal, a certain length of optical fiber fails, and the optical power of the transmitted first optical signal decreases, but there is no obvious or no decrease in the optical power of the first optical signal transmitted to the optical signal receiving apparatus 300 due to, for example, noise introduced by the optical signal amplifier 502. At this time, the actual fault cannot be judged. After the first transmission branch 210 is divided into at least one first transmission channel 211, the first optical signal flows through each first transmission channel 211, and for the single first transmission channel 211, the second optical signal is further input at the input end, and then the second optical signal is output at the output end of the second transmission channel 221. The optical power of the first optical signal is detected at the output end of the first transmission channel 211, and when the optical power of the first optical signal decreases, it is indicated that the optical power of the first optical signal on the first transmission branch 210 decreases. And if a drop in the second optical power is detected at the output of a certain first transmission channel 211, it is indicated that an event leading to a drop in the optical power occurs at a position on the first transmission branch 210 located on that first transmission channel 211.

By the method, the fault affecting the transmission of the optical signal, which occurs on the first transmission channel 211 of the first transmission branch 210, can be determined without changing the transmission structure of the optical signal. The method is high in applicability and accurate in detection.

In some embodiments, as shown in fig. 4, the specific operation of determining whether the first transmission channel 211 is faulty according to the acquired optical power of the first optical signal and the acquired optical power of the second optical signal is:

the first control unit 420 determines that the first transmission channel 211 fails if the optical power of the first optical signal is less than the optical power reference value of the first optical signal and the optical power of the second optical signal is less than the optical power reference value of the second optical signal.

Or:

the first control unit 420 determines that the first transmission channel 211 fails if the optical power of the second optical signal is less than the optical power reference value of the second optical signal.

Or alternatively:

the first control unit 420 determines that the first transmission channel 211 is not failed if the optical power of the first optical signal is greater than or equal to the optical power reference value of the first optical signal, or if the optical power of the second optical signal is greater than or equal to the optical power reference value of the second optical signal.

In some embodiments, the method for determining the optical power reference value specifically includes:

Illustratively, when the optical power reference value is an average value of the optical power of the optical signal within the preset time:

as long as the optical power of the second optical signal is smaller than the optical power reference value of the second optical signal, it can be determined that the first transmission channel 211 is malfunctioning. Or as long as the optical power of the first optical signal is smaller than the optical power reference value of the first optical signal and the optical power of the second optical signal is smaller than the optical power reference value of the second optical signal, it may be determined that the first transmission channel 211 is malfunctioning. When the optical power of the first optical signal is greater than or equal to the optical power reference value of the first optical signal and the optical power of the second optical signal is greater than or equal to the optical power reference value of the second optical signal, it may be determined that the first transmission channel 211 is not failed. The reference value of the optical power at this time is an average value of the optical power of the optical signal within a preset time. I.e. the current optical power of the optical signal is compared with the average value of the optical power of the optical signal in a preset time.

In some embodiments, the optical power reference value of the first optical signal is an average value of the optical power of the first optical signal minus the first value over a preset time; the reference value of the optical power of the second optical signal is an average value of the optical power of the second optical signal minus the second value within a preset time.

Illustratively, when the optical power reference value is a value obtained by subtracting a value from an average value of optical power of the optical signal within a preset time:

the reference value of the optical power at this time is an average value of the optical power of the optical signal within a preset time minus a value. I.e. the current optical power of the optical signal is compared with the value obtained by subtracting a value from the average value of the optical power of the optical signal in a preset time. The meaning of the representation is that the optical power of the current optical signal not only has a decreasing trend relative to the average value of the optical power of the optical signal in the preset time, but also needs to be decreased by a certain value to determine that the corresponding first transmission channel 211 has a fault.

In some embodiments, the calculation of the average value of the optical power of the first optical signal is performed only when the variation amplitude of the optical power of the first optical signal is smaller than a certain interval within a preset time. And calculating the average value of the optical power of the second optical signal when the variation amplitude of the optical power of the second optical signal is smaller than a certain interval within the preset time.

In some embodiments, the optical power reference value of the first optical signal is redetermined when the optical power of the first optical signal drops by a certain magnitude at a certain time. And after the optical power of the second optical signal drops by a certain amplitude, the optical power reference value of the second optical signal is redetermined.

Illustratively, as shown in fig. 8, the optical signal remains stable from time t0 to time t1, and the optical power reference value is determined as an average value y1 of the optical power of the optical signal from time t0 to time t 1. In the time range from t1 to t2, although the optical power of the optical signal is changed, the variation range of the optical power is larger than 0.5dB, so that the average value of the optical power of the optical signal is not recalculated, and the optical power reference value is kept at y1. The optical power of the optical signal changes in the time range from t2 to t3, but the change range is in the range of 0.5dB, so the optical power reference value is refreshed, that is, the average value of the optical power of the optical signal in the time range from t2 to t3 is calculated and taken as a new optical power reference value. And at time t3 the optical power of the optical signal suddenly drops by more than a certain amplitude, for example by 1dB, at which time the optical power reference value is redetermined, taking the average value y2 of the optical power of the optical signal in the time range from t3 to t4 as the new optical power reference value.

S104, when determining that the first transmission channel 211 fails, the optical signal detection apparatus 400 sends indication information to the optical signal receiving apparatus 300, where the indication information is used to indicate that the first transmission channel 211 fails.

S105, the optical signal receiving apparatus 300 receives the instruction information from the optical signal detecting apparatus 400.

Illustratively, the indication information may further include at least one of the following information: the difference between the optical power reference value of the first optical signal and the optical power of the first optical signal, the difference between the optical power reference value of the second optical signal and the optical power of the second optical signal, and the identification of the failed first transmission channel 211.

The difference between the optical power reference value of the first optical signal and the optical power of the first optical signal, and the difference between the optical power reference value of the second optical signal and the optical power of the second optical signal can be used to represent the optical signal insertion loss of the optical signal on the first transmission channel 211. The optical signal receiving apparatus 300 may select whether to switch the transmission branch for transmitting the first optical signal according to the degree of optical signal insertion loss of the first transmission channel 211. While the identity of the failed first transmission channel 211 may be used to locate the failed location on the first transmission branch 210.

S106, the optical signal receiving apparatus 300 selects whether to send one of the first optical signal on the first transmission branch 210 and the optical signal on the second transmission branch 220 to the subsequent device that needs to receive the first optical signal according to the received indication information.

In some embodiments, when the first transmission channel 211 on the first transmission branch 210 fails, the optical signal receiving apparatus 300 selects the first optical signal on the second transmission branch 220 to send to a subsequent device that needs to receive the first optical signal.

In some embodiments, when the first transmission channel 211 on the first transmission branch 210 fails, the optical signal receiving apparatus 300 continues to select the first optical signal on the first transmission branch 210 to send to a subsequent device that needs to receive the first optical signal.

In some embodiments, the second transmission branch 220 comprises at least one second transmission channel 221, in which case:

if neither the first transmission channel 211 on the first transmission branch 210 nor the second transmission channel 221 on the second transmission branch 220 fails, the optical signal receiving apparatus 300 continues to select the first optical signal on the first transmission branch 210 to be transmitted to a subsequent device that needs to receive the first optical signal.

If the first transmission channel 211 on the first transmission branch 210 fails, but the second transmission channel 221 on the second transmission branch 220 fails, the optical signal receiving apparatus 300 selects the first optical signal on the second transmission branch 220 to send to a subsequent device that needs to receive the first optical signal.

If there is a failure in the first transmission channel 211 on the first transmission branch 210 and there is a transmission in the second transmission channel 221 on the second transmission branch 220, the optical signal receiving apparatus 300 determines the optical power values of the first optical signals on the first transmission branch 210 and the second transmission branch 220, and selects the first optical signal with higher optical power to send to the subsequent device that needs to receive the first optical signal.

The embodiment of the application also provides a chip system. The system-on-chip includes at least one processor and at least one interface circuit. The at least one processor and the at least one interface circuit may be interconnected by wires. The processor is configured to enable the electronic device to perform the functions or steps of the above-described method embodiments, and at least one interface circuit may be configured to receive signals from other devices (e.g., memory) or to transmit signals to other devices (e.g., communication interfaces). The system-on-chip may include a chip, and may also include other discrete devices.

The embodiments of the present application also provide a computer readable storage medium including instructions that, when executed on an electronic device, cause the electronic device to perform the functions or steps of the method embodiments described above, for example, performing the method as shown in fig. 7.

The embodiments of the present application also provide a computer program product comprising instructions which, when run on an electronic device as described above, cause the electronic device to perform the functions or steps of the method embodiments described above, for example, performing the method as shown in fig. 7.

Technical effects concerning the chip system, the computer-readable storage medium, the computer program product refer to the technical effects of the previous method embodiments.

The control unit according to the embodiment of the application may be a chip. For example, it may be a field programmable gate array (field programmable gate array, FPGA), an application specific integrated chip (application specific integrated circuit, ASIC), a system on chip (SoC), a central processing unit (central processor unit, CPU), a network processor (network processor, NP), a digital signal processing circuit (digital signal processor, DSP), a microcontroller (micro controller unit, MCU), a programmable controller (programmable logic device, PLD) or other integrated chip.

It should be understood that, in various embodiments of the present application, the sequence numbers of the foregoing processes do not mean the order of execution, and the order of execution of the processes should be determined by the functions and internal logic thereof, and should not constitute any limitation on the implementation process of the embodiments of the present application.

Those of ordinary skill in the art will appreciate that the various illustrative modules and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses, units and modules may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein.

In the several embodiments provided by the present application, it should be understood that the disclosed systems, devices, and methods may be implemented in other manners. For example, the above-described device embodiments are merely illustrative, e.g., the division of the modules is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple modules or components may be combined or integrated into another device, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, indirect coupling or communication connection of devices or modules, electrical, mechanical, or other form.

The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physically separate, i.e., may be located in one device, or may be distributed over multiple devices. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional module in the embodiments of the present application may be integrated in one device, or each module may exist alone physically, or two or more modules may be integrated in one device.

In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using a software program, it may 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 the computer program instructions are loaded and executed on a computer, the processes or functions described in accordance with embodiments of the present application are produced in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. 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 one website, computer, server, or data center to another website, computer, server, or data center by a wired (e.g., coaxial cable, fiber optic, digital subscriber line (Digital Subscriber Line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device including one or more servers, data centers, etc. that can be integrated with the medium. The usable medium may be a magnetic medium (e.g., a floppy Disk, a hard Disk, a magnetic tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a Solid State Disk (SSD)), or the like.

The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. An optical signal detection device, wherein the optical signal detection device is configured to be coupled to an output end of a first transmission channel, the first transmission channel is configured to transmit a first optical signal and a second optical signal, the first optical signal carries service information, and the second optical signal carries optical monitoring information; the optical signal detection device includes: a detection unit and a first control unit;

the detection unit is used for acquiring the optical power of the first optical signal and the optical power of the second optical signal at the output end;

the first control unit is used for: and determining whether the first transmission channel fails according to the optical power of the first optical signal and the optical power of the second optical signal.

2. The device according to claim 1, wherein the first control unit is specifically configured to:

And if the optical power of the first optical signal is smaller than the optical power reference value of the first optical signal and the optical power of the second optical signal is smaller than the optical power reference value of the second optical signal, determining that the first transmission channel fails.

3. The device according to claim 1, wherein the first control unit is specifically configured to:

and if the optical power of the second optical signal is smaller than the optical power reference value of the second optical signal, determining that the first transmission channel fails.

4. The device according to claim 1, wherein the first control unit is specifically configured to:

and if the optical power of the first optical signal is greater than or equal to the optical power reference value of the first optical signal, or if the optical power of the second optical signal is greater than or equal to the optical power reference value of the second optical signal, determining that the first transmission channel is not failed.

5. A device according to any one of claims 1-3, wherein the first control unit is further adapted to:

and when the first transmission channel is determined to be faulty, sending indication information to an optical signal receiving device, wherein the indication information is used for indicating the first transmission channel to be faulty.

6. The apparatus of claim 5, wherein the indication information comprises a difference between an optical power reference value of the first optical signal and an optical power of the first optical signal, or comprises a difference between an optical power reference value of the second optical signal and an optical power of the second optical signal.

7. The apparatus of claim 6, wherein the indication information further comprises an identification of the first transmission channel.

8. The apparatus according to any one of claims 2 to 4, wherein the optical power reference value of the first optical signal is an average value of optical powers of the first optical signal minus a first value for a preset time; the reference value of the optical power of the second optical signal is the average value of the optical power of the second optical signal minus a second value within a preset time.

9. The apparatus according to any one of claims 2 to 4, wherein the optical power reference value of the first optical signal is an average value of optical powers of the first optical signal for a preset time; the reference value of the optical power of the second optical signal is an average value of the optical power of the second optical signal in a preset time.

10. The apparatus according to any one of claims 1-9, wherein the detection unit comprises a second optical monitoring device; the second optical monitoring device is configured to obtain an optical power of the second optical signal at the output end.

11. The apparatus of claim 10, wherein a first optical signal monitoring device is coupled to an input of the first transmission channel;

the first optical signal monitoring device is used for inputting a second optical signal to the first transmission channel;

the second optical signal monitoring device is configured to: receiving a second optical signal transmitted on the first transmission channel, and acquiring the optical power of the second optical signal and the optical monitoring information;

the first control unit is used for acquiring the optical power of the second optical signal and the optical monitoring information from second optical signal monitoring equipment.

12. The apparatus according to any one of claims 1-11, wherein the detection unit further comprises an optical power amplifier; the optical power amplifier is configured to obtain an optical power of the first optical signal at the output end.

13. An optical signal receiving apparatus, comprising: an optical line protection unit and a second control unit; the optical line protection unit is used for receiving first optical signals transmitted by the first transmission branch and the second transmission branch; the first transmission branch comprises at least one first transmission channel, and the first optical signal carries service information;

The second control unit is used for receiving indication information from the optical signal detection device, and the indication information is used for indicating that the first transmission channel fails;

the second control unit is further configured to instruct the optical line protection unit to selectively send one of the first optical signal on the first transmission branch and the first optical signal on the second transmission branch according to the instruction information.

14. The apparatus of claim 13, wherein the indication information comprises a difference between an optical power reference value of the first optical signal and an optical power of the first optical signal.

15. The apparatus of claim 13, wherein the first transmission channel is further configured to transmit a second optical signal; the second optical signal carries optical monitoring information, and the indication information includes a difference between an optical power reference value of the second optical signal and an optical power of the second optical signal.

16. The apparatus of any of claims 13-15, wherein the indication information comprises an identification of the failed first transmission channel.

17. The apparatus of claim 13, wherein the second control unit instructs the optical line protection unit to select the first optical signal on the second transmission leg to transmit when the first transmission channel of the first transmission leg fails.

18. The apparatus of claim 13, wherein the second transmission branch comprises at least one second transmission channel; when the first transmission channel and the second transmission channel are both failed, the second control unit instructs the optical line protection unit to select the first optical signal with high transmission optical power.

19. An optical signal transmission method is characterized by being applied to an optical signal detection device, wherein the optical signal detection device is used for being coupled to an output end of a first transmission channel, the first transmission channel is used for transmitting a first optical signal and a second optical signal, the first optical signal carries service information, and the second optical signal carries optical monitoring information; the method comprises the following steps:

the optical signal detection device obtains the optical power of the first optical signal and the optical power of the second optical signal at the output end;

the optical signal detection device determines whether the first transmission channel fails according to the optical power of the first optical signal and the optical power of the second optical signal.

20. The method according to claim 19, wherein said determining whether said first transmission channel is malfunctioning based on the optical power of said first optical signal and the optical power of said second optical signal, comprises:

21. The method according to claim 19, wherein determining whether the first transmission channel is malfunctioning based on the second optical power, comprises:

the first control unit determines that the first transmission channel fails if the optical power of the second optical signal is less than an optical power reference value of the second optical signal.

22. The method according to claim 19, wherein said determining whether said first transmission channel is malfunctioning based on the optical power of said first optical signal and the optical power of said second optical signal, comprises:

the first control unit determines that the first transmission channel is not malfunctioning if the optical power of the first optical signal is greater than or equal to an optical power reference value of the first optical signal, or if the optical power of the second optical signal is greater than or equal to an optical power reference value of the second optical signal.

23. The method according to any one of claims 19-21, further comprising:

24. The method of claim 23, wherein the indication information comprises a difference between an optical power reference value of the first optical signal and an optical power of the first optical signal, or comprises a difference between an optical power reference value of the second optical signal and an optical power of the second optical signal.

25. The method of claim 24, wherein the indication information further comprises: and identifying the failed first transmission channel.

26. The method according to any one of claims 20-22, wherein the optical power reference value of the first optical signal is an average value of the optical power of the first optical signal minus a first value within a preset time; the reference value of the optical power of the second optical signal is the average value of the optical power of the second optical signal minus a second value within a preset time.

27. The method according to any one of claims 20 to 22, wherein the optical power reference value of the first optical signal is an average value of the optical power of the first optical signal for a preset time; the reference value of the optical power of the second optical signal is an average value of the optical power of the second optical signal in a preset time.

28. The optical signal transmission method is characterized by being applied to an optical signal receiving device, wherein the optical signal receiving device is used for receiving first optical signals transmitted by a first transmission branch and a second transmission branch; the first transmission branch comprises at least one first transmission channel, and the first optical signal carries service information; the method comprises the following steps:

the optical signal receiving device receives indication information from the optical signal detecting device, wherein the indication information is used for indicating that the first transmission channel fails;

the optical signal receiving device selects one of the first optical signal on the first transmission branch and the first optical signal on the second transmission branch to be transmitted according to the instruction information.

29. The method of claim 28, wherein the indication information comprises a difference between an optical power reference value of the first optical signal and an optical power of the first optical signal.

30. The method of claim 28, wherein the first transmission channel is further used to transmit a second optical signal; the second optical signal carries optical monitoring information, and the indication information includes a difference between an optical power reference value of the second optical signal and an optical power of the first optical signal.

31. The method according to any one of claims 28-30, wherein the indication information comprises: and identifying the failed first transmission channel.

32. An optical signal transmission system, comprising a first transmission branch, a second transmission branch, at least one optical signal detection device according to any one of claims 1-12, at least one optical signal receiving device according to any one of claims 13-18; the first transmission branch comprises at least one first transmission channel; the optical signal detection device is used for detecting whether the first transmission channel fails, and the optical signal receiving device is used for receiving the optical signals on the first transmission branch and the second transmission branch and selecting one of the optical signals on the first transmission branch and the optical signals on the second transmission branch to send.