CN117856885A

CN117856885A - Operation and maintenance method, optical communication equipment and optical communication system

Info

Publication number: CN117856885A
Application number: CN202211737898.1A
Authority: CN
Inventors: 张欢; 毛文妍; 易品; 孙晓斌; 高士民
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2022-10-09
Filing date: 2022-12-31
Publication date: 2024-04-09
Also published as: CN117857949A; WO2024078104A1; WO2024078242A1; CN117857948A; CN117856962A; CN117856969A; CN117856884A; CN117857069A

Abstract

The embodiment of the application discloses an operation and maintenance method, optical communication equipment and an optical communication system, which can timely operate and maintain the optical communication system, improve the operation and maintenance efficiency of the optical communication system and meet the requirement of the optical communication system on diversification of operation and maintenance information types. The method comprises the following steps: the first optical communication device receives first status information from the second optical communication device; the first optical communication device obtains operation and maintenance information according to the first state information and the pre-stored second state information, wherein the operation and maintenance information is related to the characteristics of the second optical communication device and/or is related to the characteristics of an optical fiber link between the first optical communication device and the second optical communication device.

Description

Operation and maintenance method, optical communication equipment and optical communication system

The present application claims priority from the chinese patent application filed on 10 months 09 of 2022, filed under the application number 202211226927.8, entitled "P2 MP network system based on F-TDMA and IP and optical depth fusion", the entire contents of which are incorporated herein by reference.

Technical Field

The present disclosure relates to the field of optical communications technologies, and in particular, to an operation and maintenance method, an optical communications device, and an optical communications system.

Background

The passive converged point-to-multipoint optical network includes a core node (CP), an optical splitter connected to the CP, and a plurality of Access Points (APs) connected to the optical splitter. The optical module arranged in the AP or the CP can collect operation and maintenance information, and the operation and maintenance information comprises the temperature, the working voltage, the bias current, the received optical power, the emergent optical power and the like of the optical module. The optical module has preset an alarm threshold range. If the parameters included in the operation and maintenance information exceed the alarm threshold range, the optical module sends alarm information to the network management equipment. The network management equipment realizes the operation and maintenance of the optical module based on the alarm information.

However, there is considerable hysteresis in the operation and maintenance of the optical module by the alarm information, and there is a passive response after the optical module failure occurs, resulting in an inefficient operation and maintenance of the optical communication system. And the operation and maintenance information comprises limited parameter types, so that the method can not adapt to the requirements of the optical communication system on the diversification of the operation and maintenance information due to the scale and complexity improvement.

Disclosure of Invention

The embodiment of the application provides an operation and maintenance method, optical communication equipment and an optical communication system, which can timely operate and maintain the optical communication system, improve the operation and maintenance efficiency of the optical communication system and meet the requirement of the optical communication system on diversification of operation and maintenance information types.

The first aspect of the application provides an operation and maintenance method, which comprises the following steps: the first optical communication device receives first status information from the second optical communication device; the first optical communication device obtains operation and maintenance information according to the first state information and the pre-stored second state information, wherein the operation and maintenance information is related to the characteristics of the second optical communication device and/or is related to the characteristics of an optical fiber link between the first optical communication device and the second optical communication device.

By adopting the method, the second optical communication equipment can trigger the second optical communication equipment to acquire operation and maintenance information by sending the first state information to the first optical communication equipment, so that the second optical communication equipment and/or an optical fiber link can be automatically operated and maintained by the operation and maintenance information, the operation and maintenance efficiency and accuracy are improved, and the requirement of an optical communication system for diversification of operation and maintenance information types is improved.

Based on the first aspect, in an optional implementation manner, the first state information and the second state information are respectively sequences, and the operation and maintenance information includes channel characteristics between the first optical communication device and the second optical communication device.

By adopting the implementation mode, the channel characteristics between the first optical communication equipment and the second optical communication equipment can be operated and maintained, the timeliness and the accuracy of the operation and maintenance of the channel are improved, the automatic operation and maintenance of the channel can be realized, and the efficiency of the operation and maintenance of the channel is improved.

Based on the first aspect, in an optional implementation manner, the receiving, by the first optical communication device, the first status information from the second optical communication device includes: the first optical communication system receives the first state information through all frequency resources of a system spectrum, wherein the system spectrum corresponds to the baud rate of the second optical communication device.

By adopting the implementation mode, the first optical communication equipment receives the first state information through all frequency resources of the system spectrum, so that the first operation and maintenance information can accurately embody the condition of a channel between the first optical communication equipment and the second optical communication equipment, and the efficiency and the accuracy of channel operation and maintenance are improved.

Based on the first aspect, in an optional implementation manner, the operation and maintenance information is a change amount of the first state information and the second state information with respect to frequency, and the change amount is a phase or an amplitude.

By adopting the implementation mode, the operation and maintenance information can accurately embody the channel condition between the first optical communication equipment and the second optical communication equipment, the timeliness of operation and maintenance on the channel and the operation and maintenance efficiency are improved, the channel fault can be timely and accurately positioned, and the fault positioning accuracy is improved.

Based on the first aspect, in an optional implementation manner, after the first optical communication device obtains the operation and maintenance information according to the first state information and the pre-stored second state information, the method further includes: the first optical communication device modulates the operation and maintenance information on a first operation and maintenance subcarrier to obtain a first modulated optical signal; the first optical communication device transmits the first modulated optical signal to the second optical communication device.

By adopting the implementation mode, the bandwidth utilization rate of the system spectrum can be improved by modulating the operation and maintenance information on the first operation and maintenance subcarrier, the damage degree of the service to the channel between the first optical communication equipment and the second optical communication equipment is reduced, and the robustness of the service is ensured.

Based on the first aspect, in an optional implementation manner, before the first optical communication device sends the first modulated optical signal to the second optical communication device, the method further includes: the first optical communication device receives a subcarrier indication message from the second optical communication device, where the subcarrier indication message is used to indicate the first operation and maintenance subcarrier.

By adopting the implementation mode, the efficiency of the first optical communication equipment for obtaining the first operation and maintenance subcarrier is effectively improved.

Based on the first aspect, in an optional implementation manner, the first operation and maintenance subcarrier is a subcarrier predetermined by the first optical communication device.

By adopting the implementation mode, the first optical communication equipment can select the first operation and maintenance subcarrier according to the condition of each subcarrier, so that the damage degree of the service to the channel between the first optical communication equipment and the second optical communication equipment is reduced, and the service robustness is ensured.

Based on the first aspect, in an optional implementation manner, the method further includes: the first optical communication device modulates a service on a service subcarrier to obtain a service optical signal, the service subcarrier being different from the first operation and maintenance subcarrier; the first optical communication device sends the service optical signal to the second optical communication device.

By adopting the implementation mode, the first operation and maintenance sub-carrier is different from the service sub-carrier, and the utilization rate of bandwidth resources is effectively improved. And in the process of service transmission, the transmission of the operation and maintenance information is carried out through the first operation and maintenance subcarrier, so that the interruption of service in the operation and maintenance process is avoided.

Based on the first aspect, in an optional implementation manner, a center frequency of the first operation and maintenance subcarrier is smaller than a center frequency of the service subcarrier.

By adopting the implementation mode, under the condition that the center frequency of the first operation and maintenance subcarrier is smaller than the center frequency of the service subcarrier, the anti-interference capability of the first operation and maintenance subcarrier is enhanced, the reliability of operation and maintenance information transmission is improved, the signal distortion of the first operation and maintenance information transmitted through the first operation and maintenance subcarrier can be reduced, and the robustness is improved.

Based on the first aspect, in an optional implementation manner, the receiving, by the first optical communication device, the first status information from the second optical communication device includes: the first optical communication device receives a second modulated optical signal from the second optical communication device; the first optical communication device demodulates the second modulated optical signal to obtain the first state information modulated on a second operation and maintenance subcarrier, where the second operation and maintenance subcarrier belongs to a part of frequency resources of a system spectrum, and the system spectrum corresponds to the baud rate of the second optical communication device, where the first state information and the second state information are respectively state information of an optical module included in the second optical communication device, and/or the first state information and the second state information are respectively collected by an optical time domain reflectometer OTDR and are respectively state information of an optical fiber link between the first optical communication device and the second optical communication device.

By adopting the implementation mode, the first optical communication equipment can timely and accurately acquire the state information of the optical module and/or the state information of the optical fiber link of the second optical communication equipment, so that the diversity of operation and maintenance information types is ensured, and the timeliness and reliability of operation and maintenance are improved.

A second aspect of the present application provides an operation and maintenance method, the method including: the second optical communication device sends first state information to the first optical communication device, wherein the first state information is used for indicating the first optical communication device to obtain operation and maintenance information according to the first state information, and the operation and maintenance information is related to the characteristics of the second optical communication device and/or the characteristics of an optical fiber link between the first optical communication device and the second optical communication device.

For an explanation of the beneficial effects of this aspect, please refer to the first aspect, and detailed descriptions thereof are omitted.

Based on the second aspect, in an optional implementation manner, the first state information and the second state information are respectively sequences, and the operation and maintenance information includes channel characteristics between the first optical communication device and the second optical communication device.

Based on the second aspect, in an optional implementation manner, the sending, by the second optical communication device, the first status information to the first optical communication device includes: the second optical communication device transmits the first state information through all frequency resources of a system spectrum, wherein the system spectrum corresponds to the baud rate of the second optical communication device.

Based on the second aspect, in an optional implementation manner, the operation and maintenance information is a change amount of the first state information and the second state information with respect to frequency, and the change amount is a phase or an amplitude.

Based on the second aspect, in an optional implementation manner, after the second optical communication device sends the first status information to the first optical communication device, the method further includes: the second optical communication device receives a first modulated optical signal from the first optical communication device; the second optical communication device demodulates the first modulated optical signal to obtain the modulated operation and maintenance information on the first operation and maintenance subcarrier.

Based on the second aspect, in an optional implementation manner, after the second optical communication device demodulates the first modulated optical signal to obtain the operation and maintenance information modulated on the first operation and maintenance subcarrier, the method further includes: the second optical communication device obtains a target frequency band, wherein the target frequency band is used for interaction service between the first optical communication device and the second optical communication device, and the target frequency band comprises at least one service subcarrier; the second optical communication device obtains target operation and maintenance information, wherein the target operation and maintenance information is a change curve of a change amount between the first state information and the second state information along with frequency in a frequency range of a target service subcarrier, the change amount is a phase or an amplitude, and the target service subcarrier is any one of the at least one service subcarrier; and the second optical communication equipment modulates the service on the target service subcarrier according to the target operation and maintenance information.

Based on the second aspect, in an optional implementation manner, modulating, by the second optical communication device, the service on the target service subcarrier according to the target operation and maintenance information includes: the second optical communication device modulates the service on the target service subcarrier according to the attribute parameters of the service according to the target operation and maintenance information, wherein the attribute parameters are at least one of the following: signal to noise ratio, modulation rate, modulation format, or modulation order.

Based on the second aspect, in an optional implementation manner, before the second optical communication device receives the first modulated optical signal from the first optical communication device, the method further includes: the second optical communication device sends a subcarrier indication message to the first optical communication device, where the subcarrier indication message is used to indicate the first operation and maintenance subcarrier.

Based on the second aspect, in an optional implementation manner, the method further includes: the second optical communication device receives the service optical signal from the first optical communication device; the second optical communication device demodulates the service optical signal to obtain a modulated service on a service subcarrier, the service subcarrier being different from the first operation and maintenance subcarrier.

Based on the second aspect, in an optional implementation manner, a center frequency of the first operation and maintenance subcarrier is smaller than a center frequency of the service subcarrier.

Based on the second aspect, in an optional implementation manner, the sending, by the second optical communication device, the first status information to the first optical communication device includes: the second optical communication device modulates the first state information on a second operation and maintenance subcarrier to obtain a second modulated optical signal, the second operation and maintenance subcarrier belongs to part of frequency resources of a system spectrum, the system spectrum corresponds to the baud rate of the second optical communication device, wherein the first state information and the second state information are respectively the state information of an optical module included in the second optical communication device, and/or the first state information and the second state information are respectively the state information of an optical fiber link between the first optical communication device and the second optical communication device, which are acquired by an Optical Time Domain Reflectometer (OTDR).

A third aspect of the present application provides an optical communication device comprising a processor and an optical module connected to the processor; the optical module is used for receiving first state information from another optical communication device; the processor is configured to obtain operation and maintenance information according to the first state information and the pre-stored second state information, where the operation and maintenance information is related to a feature of the second optical communication device and/or is related to a feature of an optical fiber link between the first optical communication device and the second optical communication device.

A fourth aspect of the present application provides an optical communication device, the communication device comprising a processor and an optical module connected to the processor; the processor is configured to obtain first state information, where the first state information is used to instruct another optical communication device to obtain operation and maintenance information according to the first state information, where the operation and maintenance information is related to a feature of the optical communication device and/or is related to a feature of an optical fiber link between the optical communication device and the other optical communication device; the optical module is configured to send the first status information to the other optical communication device.

A fifth aspect of the present application provides an optical communication system, the optical communication device including a first optical communication device and a second optical communication device; the second optical communication device is configured to send first status information to the first optical communication device; the first optical communication device is configured to receive the first status information from the second optical communication device; the first optical communication device is configured to obtain operation and maintenance information according to the first state information and pre-stored second state information, where the operation and maintenance information is related to a feature of the second optical communication device and/or is related to a feature of an optical fiber link between the first optical communication device and the second optical communication device.

A sixth aspect of the present application provides a network device comprising a processor and a transceiver coupled to the processor, the transceiver configured to obtain first status information from another optical communication device; the processor is configured to obtain operation and maintenance information according to the first state information and the pre-stored second state information, where the operation and maintenance information is related to a feature of the second optical communication device and/or is related to a feature of an optical fiber link between the first optical communication device and the second optical communication device.

A seventh aspect of the present application provides a network device, where the network device includes a processor and a transceiver connected to the processor, where the processor is configured to obtain first state information, where the first state information is used to instruct another optical communication device to obtain operation and maintenance information according to the first state information, where the operation and maintenance information is related to a feature of the another optical communication device, and/or related to a feature of an optical fiber link between the first optical communication device and the second optical communication device, and where the optical module is configured to send the first state information to the another optical communication device.

An eighth aspect of the present application provides a computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the method of operation in any implementation of the first or second aspect described above.

Drawings

Fig. 1 is a structural example diagram of an optical communication system provided in the present application;

FIG. 2 is a flowchart illustrating steps of an operation and maintenance method according to an embodiment of the present application;

FIG. 3 is an illustration of an embodiment of a downlink system spectrum provided herein;

FIG. 4a is a diagram illustrating an embodiment of a first frequency response curve provided herein;

FIG. 4b is a diagram of a second frequency response curve according to an embodiment of the present application;

FIG. 4c is an illustration of one embodiment of the operation and maintenance information provided herein;

FIG. 5 is an illustration of an embodiment of an uplink system spectrum provided herein;

fig. 6 is an illustration of another embodiment of an uplink system spectrum provided in the present application;

fig. 7 is an exemplary diagram of an embodiment of a frequency response corresponding to an uplink subcarrier provided in the present application;

FIG. 8 is a flowchart illustrating steps of another embodiment of the operation and maintenance method provided in the present application;

FIG. 9 is a flowchart illustrating steps of a method for performing operation and maintenance according to another embodiment of the present application;

fig. 10 is a structural example diagram of another embodiment of an optical communication system provided in the present application;

fig. 11 is a structural example diagram of another embodiment of an optical communication system provided in the present application;

Fig. 12 is a structural example diagram of another embodiment of an optical communication system provided in the present application;

fig. 13 is a structural example diagram of another embodiment of an optical communication system provided in the present application;

fig. 14 is a structural example diagram of one embodiment of a network device provided in the present application;

fig. 15 is a structural example diagram of an embodiment of a chip according to an embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.

The following describes the structure of an optical communication system to which the operation and maintenance method provided in the present application is applied, and fig. 1 is a structural example diagram of an embodiment of the optical communication system provided in the present application. The optical communication system 100 shown in fig. 1 can establish a point-to-multipoint channel based on frequency division multiplexing-time division multiple access (frequency division multiplexing-time division multiple access, F-TDMA) between a core node and a plurality of access nodes without depending on multiple access devices such as an optical line terminal (optical line terminal, OLT), and can simplify the system architecture and improve the data transmission efficiency.

The optical communication system 100 includes a CP101, an optical splitter 102, and at least one AP. The number of APs included in the optical communication system 100 is not limited in this embodiment, and for example, the optical communication system 100 includes three APs, that is, AP103, AP104, and AP105. The CP is connected to one end of the optical combiner 102 through a trunk optical fiber, and the other end of the optical combiner 102 is connected to the AP103, the AP104 and the AP105 through branch optical fibers, respectively. The CP101 includes a CP-side device 111 and a first optical module 112. Illustratively, the CP-side device 111 may be a switch (e.g., a core layer switch, a layer 2 switch) or a router. The first optical module 112 may be directly inserted into the CP-side device 111, or may be integrated with the CP-side device 111. The first optical module 112 is connected to the optical combiner 102 by a backbone fiber. Taking the AP103 as an example, the AP103 includes a second optical module 121 and an AP-side device 122. For example, the second optical module 121 may be directly inserted into the AP-side device 122, or may be integrated with the AP-side device 122. The second optical module 121 is connected to the optical combiner 102 by a branch optical fiber. In this embodiment, taking the AP103 including one second optical module as an example, in other examples, the AP103 may also include a plurality of second optical modules, and the number of optical modules included in the AP is not limited in this embodiment.

Illustratively, CP-side device 111 is closer to the core layer and AP-side device 122 is closer to the access layer, and thus CP-side device 111 may also be referred to as a core node device (i.e., CP device) and AP-side device 122 may also be referred to as an access node device (i.e., AP device). Accordingly, the first optical module 112 may be referred to as a core node optical module (i.e., CP optical module), and the second optical module 121 may be referred to as an access node optical module (i.e., AP optical module).

In the optical communication system 100 shown in fig. 1, the first optical module 112 and the second optical module of each AP are configured to establish a point-to-multipoint channel based on F-TDMA, and specifically, in a downlink direction, that is, a direction in which the first optical module 112 sends a downlink optical signal to the second optical module, communication is performed in a frequency division multiplexing, frequency division multiple access manner. The uplink direction, i.e. the direction in which the second optical module transmits an uplink optical signal to the first optical module 112, uses a frequency division multiplexing, time division multiple access mode for communication. In addition, the optical communication system 100 in this embodiment does not need multiple access devices such as OLT to participate in establishing a point-to-multipoint channel, so that the CP-side device 111 is directly connected to the first optical module 112, and the system architecture is simplified.

The network to which the optical communication system 100 is applied in the present embodiment is not limited, for example, if the optical communication system 100 shown in the present embodiment is applied to a passive optical network (passive optical network, PON), the AP may be an optical network unit (optical network unit, ONU) or an optical network terminal (optical network terminal, ONT). If the optical communication system 100 is applied to an optical transport network (optical transport network, OTN), then both the CP and the AP may be OTN devices.

Based on the optical communication system shown in fig. 1, the execution process of the operation and maintenance method provided in the present application will be described with reference to fig. 2, where fig. 2 is a flowchart of steps of an embodiment of the operation and maintenance method provided in the present application.

Step 201, the CP sends first status information to each AP.

The CP shown in this embodiment may also be referred to as a second communication device, and the AP may also be referred to as a first communication device. In case that the CP connects a plurality of APs through the optical multiplexer, the CP may transmit the first state information to each AP. The first status information is a sequence, and the sequence includes a section of ordered bits, and the number of bits included in the first status information and the value of each bit are not limited in this embodiment.

Referring specifically to fig. 3, fig. 3 is an illustration of one embodiment of a downlink system spectrum provided in the present application. The point-to-multipoint system spectrum based on F-TDMA shown in fig. 1 includes a downlink system spectrum and an uplink system spectrum. Wherein, the frequency range of the downlink system spectrum is different from the frequency range of the uplink system spectrum, and the intersection of the frequency range of the downlink system spectrum and the frequency range of the uplink system spectrum is null. Optionally, the center frequency of the downlink system spectrum is smaller than the center frequency of the uplink system spectrum; alternatively, the center frequency of the downlink system spectrum is greater than the center frequency of the uplink system spectrum, which is not limited in this application. The downlink system frequency spectrum adopts frequency division multiplexing and frequency division multiple access mode communication, and the uplink system frequency spectrum adopts frequency division multiplexing and time division multiple access mode communication. Specifically, the downlink system spectrum includes a plurality of downlink frequency bands, each downlink frequency band being used to transmit a downlink optical signal to one AP, and different downlink frequency bands being used to transmit downlink optical signals to different APs. The downlink system spectrum shown in fig. 3 includes a downlink frequency band D1, a downlink frequency band D2, and a downlink frequency band D3, where the downlink frequency band D1 is used to transmit a downlink optical signal to the AP103, the downlink frequency band D2 is used to transmit a downlink optical signal to the AP104, and the downlink frequency band D3 is used to transmit a downlink optical signal to the AP 105. Each downlink frequency band includes one or more downlink subcarriers, for example, the downlink frequency band D1 includes one or more downlink subcarriers, and the number of downlink subcarriers included in each downlink frequency band is not limited in this embodiment. The CP101 modulates the first state information on each downlink subcarrier included in the downlink system spectrum to obtain a downlink electrical signal, the CP101 performs electro-optical conversion on the downlink electrical signal to obtain a downlink optical signal, and the CP101 transmits the downlink optical signal to the optical combiner 102. In the case of including three APs as shown in fig. 1, the optical combiner 102 splits the downlink optical signal to obtain three sub-downlink optical signals, i.e., a first sub-downlink optical signal, a second sub-downlink optical signal, and a third sub-downlink optical signal. The main optical combiner 102 transmits a first sub-downstream optical signal to the AP103, a second sub-downstream optical signal to the AP104, and a third sub-downstream optical signal to the AP 105.

It may be understood that all frequency resources of the downlink system spectrum obtained by the CP101 include downlink frequency bands D1, D2 and D3, and the CP101 transmits the first status information through all frequency resources of the downlink system spectrum. The total frequency resource range of the downlink system spectrum obtained by the CP101 corresponds to the baud rate of the CP101, where the baud rate may also be referred to as symbol rate or symbol rate, and represents the number of transmission symbol symbols per second, and the baud rate determines the communication efficiency, that is, the greater the baud rate, the more bit information is transmitted per second.

The downlink system spectrum shown in this embodiment may further include a downlink control band, where the downlink control band is used for the CP to send downlink control information to the AP. For example, the downlink control information shown in this embodiment may include a multimedia broadcast multicast service synchronization protocol (multimedia broadcast multicast service synchronization protocol, SYNC) frame, physical Layer Operation Administration Maintenance (PLOAM), uplink bandwidth mapping (Upstream Bandwidth map, US BWmap) message, and the like.

The CP modulates the downlink control information to be transmitted to the plurality of APs onto a downlink control band, and broadcasts the downlink control information of the plurality of APs through the downlink control band at the same time. Note that the downlink control information is a generic term, and information related to operation and maintenance management procedures such as time synchronization, ranging, registration, key distribution, and bandwidth allocation is referred to as downlink control information in this application. Optionally, the frequency of the downlink control band is less than the frequency of the downlink band. Taking fig. 3 as an example, the frequency of the downlink control band is smaller than the frequency of any one of the downlink bands D1, D2, and D3. Optionally, the downlink control band is a band preconfigured by the system, for example, the downlink control band is located in a certain fixed frequency band of the downlink system spectrum. Therefore, in the process of establishing the F-TDMA based point-to-multipoint system spectrum between the CP and the AP, the CP can directly use the downlink control frequency band to send downlink control information to the AP.

In this embodiment, since the downlink control frequency band for exchanging the downlink control information is configured in the point-to-multipoint system spectrum based on the F-TDMA, service transmission and downlink control information transmission can be separated from each other, which is beneficial to improving the transmission efficiency of the downlink control information, and further beneficial to improving the transmission efficiency of the whole optical communication system. In addition, the downlink control frequency band is configured at the low frequency of the downlink system frequency spectrum, so that the anti-interference capability of the downlink control frequency band is enhanced, and the reliability of downlink control information transmission is improved.

Optionally, the CP shown in this embodiment may send the first state information to each AP when the CP is first powered on. Or, when the AP successfully registers to the CP for the first time, the CP transmits the first state information to the AP. Alternatively, the CP periodically sends the first status information to the AP, which is not limited in this embodiment.

Step 202, the AP obtains first operation and maintenance information according to the first state information and the second state information.

For example, the AP103 receives the first sub-downlink optical signal from the optical combiner, and performs photoelectric conversion, demodulation, and other processes on the first sub-downlink optical signal in order to obtain first state information that is transmitted through the optical fiber link between the CP and the AP103 and is carried in the downlink system spectrum. The AP obtains the pre-stored second state information, and as shown in step 201, the first state information modulated on each downlink subcarrier by the CP is a sequence, the second state information is also a sequence, and the first state information emitted from the CP is the same as the second state information pre-stored by the AP. Since the first state information is transmitted via a channel between the CP and the AP103, the AP103 can obtain first operation and maintenance information including a channel characteristic between the CP and the AP103 according to a change of the first state information received by the AP103 with respect to the second state information.

Specifically, the AP103 obtains a first frequency response curve corresponding to the received first sub-downlink optical signal, as shown in fig. 4a, where fig. 4a is an exemplary diagram of an embodiment of the first frequency response curve provided in the present application. The first frequency response curve 400 includes a frequency range of each downlink subcarrier and an amplitude or a phase corresponding to the first status information modulated on each downlink subcarrier, and in this embodiment, the first frequency response curve 400 includes a frequency range of each downlink subcarrier and an amplitude corresponding to the first status information modulated on each downlink subcarrier. The AP103 obtains a second frequency response curve corresponding to the second state information, where fig. 4b is an exemplary diagram of an embodiment of the second frequency response curve provided in the present application. The second frequency response curve 410 includes the frequency range of each downlink subcarrier and the corresponding amplitude or phase of the second state information modulated on each downlink subcarrier. Since the second state information is pre-stored on the AP103 side, and is not transmitted through the channel between the CP and the AP103, that is, each bit included in the second state information does not pass through the impairment of the channel, in the second frequency response curve 410, the amplitude corresponding to the frequency range of each subcarrier is in an equilibrium state.

The AP103 divides the second frequency response curve 410 by the first frequency response curve 400 to obtain a system channel characteristic curve as shown in fig. 4c, wherein the abscissa of the system channel characteristic curve 420 is the frequency range of each downlink subcarrier, and the ordinate is the change amount with frequency between the first state information in the first frequency response curve and the second state information in the second frequency response curve, and the change amount is the amplitude. If the ordinate in the first frequency response curve 400 and the second frequency response curve 410 is phase, the amount of change (i.e., the ordinate) in the system channel characteristic curve 420 may also be phase.

The description of the process of the AP103 obtaining the system channel characteristic curve according to the first frequency response curve 400 and the second frequency response curve 410 is an alternative example, and is not limited, for example, the AP103 may also convert the ordinate (amplitude) of the first frequency response curve 400 into decibels (dB), and also convert the ordinate (amplitude) of the second frequency response curve 410 into dB, and the AP103 may then subtract the converted second frequency response curve 410 from the converted first frequency response curve 400 to obtain the system channel characteristic curve.

The first operation and maintenance information shown in this embodiment is the system channel characteristic curve, and reflects the channel characteristics between the CP and the AP 103. The process of sending the first operation and maintenance information to the CP by the other APs included in the optical communication system shown in this embodiment is please refer to the process of sending the first operation and maintenance information to the CP by the AP103 shown in this embodiment, which is not described in detail.

The CP in this embodiment sends the first state information through all frequency resources of the downlink system spectrum, so that the first operation and maintenance information obtained by each AP according to the first state information and the second state information can accurately embody the channel condition between the CP and the AP, and efficiency and accuracy of channel operation and maintenance are improved.

Step 203, the AP sends the first operation and maintenance information to the CP.

Continuing with the AP103 as an example, in the case where the AP103 obtains the first operation and maintenance information as shown in fig. 4c, the AP103 transmits the first operation and maintenance information to the CP. Specifically, the AP103 transmits the first operation and maintenance information through the uplink system spectrum. Fig. 5 is a schematic diagram of an embodiment of an uplink system spectrum provided in the present application. Each AP transmits the first operation and maintenance information in a slot allocated by the CP on at least one uplink subcarrier in all frequency resources of the uplink system spectrum. Different APs transmit the first operation and maintenance information to the CP in different time slots allocated by the CP. Specifically, the uplink system spectrum includes three different time slots, i.e., time slot 1, time slot 2, and time slot 3, where time slot 1 is a time slot allocated by the CP to the AP103 for transmitting the uplink optical signal, time slot 2 is a time slot allocated by the CP to the AP104 for transmitting the uplink optical signal, and similarly, time slot 3 is a time slot allocated by the CP to the AP105 for transmitting the uplink optical signal.

The AP103 transmits the first operation and maintenance information to the CP in the time slot 1 of the uplink system spectrum, and the following describes an alternative manner of transmitting the first operation and maintenance information by the AP 103:

mode 1

Referring to fig. 6 in conjunction with fig. 5, fig. 6 is an illustration of another embodiment of an uplink system spectrum provided in the present application. Within slot 1 of the uplink system spectrum, a plurality of uplink subcarriers are included. The plurality of uplink subcarriers include a service subcarrier for transmitting an uplink service to the CP and a first operation and maintenance subcarrier for transmitting first operation and maintenance information. It can be understood that the service sub-carrier for transmitting the uplink service and the first operation and maintenance sub-carrier for transmitting the first operation and maintenance information shown in this embodiment are different from each other. The AP103 modulates the first operation and maintenance information on the first operation and maintenance subcarrier to obtain a first modulated optical signal, and the AP103 sends the first modulated optical signal to the CP, so that the CP obtains the first operation and maintenance information on the first operation and maintenance subcarrier by demodulating the first modulated optical signal.

Optionally, the downlink control information received by the AP103 from the CP includes a subcarrier indication message, where the subcarrier indication message is used to indicate the first operation and maintenance subcarrier. For example, the subcarrier indication message carries an identification of the first operation and maintenance subcarrier or a frequency range of the first operation and maintenance subcarrier, so that the AP103 can determine the first operation and maintenance subcarrier in the uplink system spectrum according to the subcarrier indication message. As another example, the first operation and maintenance subcarrier shown in this embodiment is a pre-designated subcarrier, and as another example, the first operation and maintenance subcarrier is an uplink subcarrier randomly selected by the AP103 in the uplink system spectrum.

For another example, the AP103 determines the uplink subcarrier with the lowest center frequency in the uplink system spectrum as the first operation-maintenance subcarrier, that is, the center frequency of the first operation-maintenance subcarrier is smaller than the center frequency of any traffic subcarrier in the uplink system spectrum. The present embodiment does not limit the manner of determining the uplink subcarriers in the uplink system spectrum. Under the condition that the center frequency of the first operation and maintenance subcarrier is smaller than that of the service subcarrier, signal distortion of the first operation and maintenance information transmitted through the first operation and maintenance subcarrier can be reduced, and robustness is improved.

For another example, the AP103 may determine the first operation and maintenance subcarrier according to the frequency response of each uplink subcarrier in the timeslot 1, as shown in fig. 7, where fig. 7 is an exemplary diagram of the frequency response corresponding to the uplink subcarrier provided in the present application. Taking the example that the uplink system spectrum includes the uplink subcarrier 701 and the uplink subcarrier 703 as shown in fig. 7, the AP103 selects one uplink subcarrier from the uplink subcarrier 701 and the uplink subcarrier 703 as the first operation-dimensional subcarrier. Specifically, the AP103 selects a subcarrier with relatively smooth frequency response as the first operation and maintenance subcarrier, as shown in fig. 7, the uplink subcarrier 701 corresponds to the frequency response curve 702, the uplink subcarrier 703 corresponds to the frequency response curve 704, and the amplitude variation corresponding to the frequency response curve 702 is smooth with respect to the amplitude variation corresponding to the frequency response curve 704, and then the AP103 selects the uplink subcarrier 701 as the first operation and maintenance subcarrier. Specifically, the stable amplitude change corresponding to the uplink subcarrier 701 means that the uplink subcarrier 701 includes a first frequency value and a second frequency value, where the first frequency value and the second frequency value are any two frequency values included in the uplink subcarrier 701, a first parameter corresponding to the first frequency value in the frequency response 702, and a second parameter corresponding to the second frequency value in the frequency response, where the target condition is that an absolute value of a difference value between the first parameter and the second parameter is smaller than or equal to a preset value, and in this embodiment, the first parameter and the second parameter are both amplitude examples, and in other examples, the first parameter and the second parameter may also be phases, which is not specifically limited. In this embodiment, the preset value is not limited, as long as the first parameter and the second parameter are equal or approximately equal when the absolute value of the difference between the first parameter and the second parameter is less than or equal to the preset value. That is, in the case where the absolute value of the difference between the first parameter and the second parameter is less than or equal to the preset value, the uplink subcarrier 701 is determined as the first operation-dimensional subcarrier.

In this embodiment, the number of first operation and maintenance subcarriers is not limited, for example, the number of first operation and maintenance subcarriers may be one, and the AP103 modulates the complete first operation and maintenance information on the first operation and maintenance subcarriers. For another example, the number of first operation and maintenance subcarriers may be multiple, and the AP103 commonly modulates the complete first operation and maintenance information on the multiple first operation and maintenance subcarriers.

Mode 2

In embodiment 1, the service sub-carrier for transmitting the uplink service and the first operation and maintenance sub-carrier for transmitting the first operation and maintenance information are different from each other, and in this embodiment, the service sub-carrier for transmitting the uplink service may be used for transmitting the first operation and maintenance information. Specifically, the AP103 shown in this embodiment may modulate the first operation and maintenance information on one or more service subcarriers, and then, in the case of demodulating the service subcarriers from the AP, the CP may be able to obtain both the uplink service from the AP and the first operation and maintenance information.

Step 204, the CP obtains the target first operation and maintenance information corresponding to the target service sub-carrier.

In this embodiment, the CP receives the first operation and maintenance information from each AP, and takes the AP103 as an example, the CP obtains the target first operation and maintenance information corresponding to the AP 103. Specifically, the CP obtains a target frequency band allocated to the downstream direction of the AP103, where the target frequency band includes at least one service subcarrier for carrying downstream services. For example, the start frequency of the target frequency band allocated to the AP103 is fi, and the end frequency of the target frequency band allocated to the AP103 is fj. In the case that the CP receives the first operation and maintenance information from the AP103 as shown in fig. 4c, the CP obtains, in the first operation and maintenance information, target first operation and maintenance information corresponding to the AP103, where the target first operation and maintenance information is a change curve of the amount of change between the first state information and the second state information with respect to frequency in a frequency range of a target traffic subcarrier allocated to the AP 103. It is understood that the target traffic subcarrier is any traffic subcarrier included in the target frequency band allocated to the AP 103. For example, the downlink sub-carrier 401 (the starting frequency is fi, and the ending frequency is fj) included in the target frequency band (the starting frequency is fi, and the ending frequency is fk) allocated to the AP103 is a target traffic sub-carrier, and the target first operation and maintenance information of the downlink sub-carrier 401 is a change curve of the change amount between the first state information and the second state information with frequency in the frequency range of the downlink sub-carrier 401. The CP may also obtain the target first operation and maintenance information corresponding to the downlink subcarrier 402 (the starting frequency is fk and the ending frequency is fj), and the detailed process is omitted herein.

And step 205, the CP modulates the downlink service on the sub-carrier of the target service according to the first operation and maintenance information of the target.

In this embodiment, in the case that the CP obtains the target first operation and maintenance information corresponding to the target service subcarrier of the AP103, the CP can obtain the channel characteristic between the CP and the AP103 according to the first operation and maintenance information, and then modulate the downlink service on the target service subcarrier according to the channel characteristic between the CP and the AP 103.

Specifically, the CP modulates the downlink service on the target service subcarrier according to the attribute parameter of the downlink service according to the first operation and maintenance information of the target, where the attribute parameter is at least one of the following:

signal to noise ratio, modulation rate, modulation format, or modulation order.

For example, the target frequency band allocated to the AP103 by the CP includes two downlink subcarriers, namely, a downlink subcarrier 401 and a downlink subcarrier 402. If in the system channel characteristic curve shown in fig. 4c, the target first operation and maintenance information corresponding to the downlink subcarrier 401 is the system channel characteristic curve 403, the target first operation and maintenance information corresponding to the downlink subcarrier 402 is the system channel characteristic curve 404, and the system channel characteristic curve 403 is stable relative to the system channel characteristic curve 404, i.e. the drop degree of the system channel characteristic curve 404 is greater than the drop degree of the system channel characteristic curve 403. Then the signal-to-noise ratio of the downstream traffic modulated by the CP on downstream subcarrier 402 may be less than the signal-to-noise ratio of the downstream traffic modulated on downstream subcarrier 401. As another example, the CP modulates the downlink traffic modulation rate on downlink subcarrier 401 to be greater than the modulation rate on downlink subcarrier 402. As another example, the modulation order of the CP modulating the downstream traffic on the downstream subcarrier 401 is higher than the modulation order of the CP modulating the downstream traffic on the downstream subcarrier 402. It can be understood that, the CP shown in this embodiment can obtain, according to the target first operation and maintenance information, the channel characteristics corresponding to each downlink subcarrier allocated to the AP103, and further determine, according to the channel characteristics, the attribute parameters of the downlink service modulated on the downlink subcarrier, thereby effectively improving the bandwidth utilization rate of the downlink system spectrum, reducing the damage degree of the downlink service caused by the CP and the channel between the AP103, and ensuring the robustness of the downlink service.

In this embodiment, taking the example that the CP modulates the downlink service on the target service subcarrier according to the first operation and maintenance information, the CP shown in this embodiment can also determine whether a channel between the CP and the AP has a fault according to the first operation and maintenance information, so as to discover and locate the channel fault in time, for example, if the CP determines that in the first operation and maintenance information, the frequency response corresponding to the target frequency band is in a severely dropped state, the CP determines that the channel between the CP and the AP has a fault.

Step 206, the CP sends a downlink traffic optical signal to the AP.

The CP modulates the downlink traffic on each downlink subcarrier in the target frequency band corresponding to the AP to obtain a downlink electrical signal, and performs electro-optical conversion on the downlink electrical signal to obtain a downlink traffic optical signal, and the CP sends the downlink traffic optical signal to the AP through the optical combiner.

By adopting the method shown in the embodiment, the CP can trigger the AP to obtain the first operation and maintenance information for indicating the channel characteristics between the CP and the AP by sending the first state information to the AP. The CP can timely acquire the channel characteristics between the CP and the AP according to the first operation and maintenance information, so that the reliability, timeliness and operation and maintenance efficiency of operation and maintenance of the channel are improved, channel faults between the CP and the AP can be timely and accurately positioned, and the accuracy of fault positioning is improved. In addition, the CP shown in the embodiment performs operation and maintenance through the first operation and maintenance information, so that automatic operation and maintenance on the channel are realized, excessive participation of manpower is not needed in the operation and maintenance process, operation and maintenance efficiency is improved, and complexity of operation and maintenance is reduced. The CP effectively improves the bandwidth utilization rate of the downlink system spectrum according to the downlink service modulated on the downlink sub-carrier corresponding to the channel characteristics between the CP and the AP, and modulates the downlink service based on the channel characteristics corresponding to each downlink sub-carrier, thereby reducing signal distortion and improving the robustness of the signal.

In the embodiment shown in fig. 2, the CP can correspondingly modulate the downlink traffic on the downlink sub-carrier according to the channel characteristics of the downlink system spectrum between the CPs, and in the embodiment shown in fig. 8, the AP can correspondingly modulate the uplink traffic on the uplink sub-carrier according to the channel characteristics of the uplink system spectrum between the APs, wherein fig. 8 is a flowchart of another embodiment of the operation and maintenance method provided in the present application.

Step 801, the AP sends first status information to the CP.

The AP shown in this embodiment may also be referred to as a second communication device, and the CP may also be referred to as a first communication device. In this embodiment, the AP sends the first status information to the CP in the uplink system spectrum allocated by the CP, and for the description of the first status information, please refer to the embodiment corresponding to fig. 2, for the description of the uplink system spectrum, please refer to the embodiment corresponding to fig. 5, which is not described in detail. Specifically, the AP transmits the first state information through the timeslot allocated to the AP by the CP, that is, the AP modulates the first state information on each uplink subcarrier in all frequency resources in the timeslot allocated by the CP to obtain an uplink electrical signal, the AP performs electro-optical conversion on the uplink optical signal to obtain a target uplink optical signal, and the AP transmits the target uplink optical signal to the CP. The uplink system spectrum shown in this embodiment may further include an uplink control sub-band, and for the description of the uplink control sub-band, please refer to the description of the downlink control band corresponding to fig. 3, which is not repeated in detail.

It can be understood that in this embodiment, since the uplink control sub-band for exchanging uplink control information is configured in the point-to-multipoint uplink system spectrum based on the F-TDMA, uplink traffic transmission and uplink control information transmission can be separated from each other, which is beneficial to improving the transmission efficiency of the uplink control information, and thus is beneficial to improving the transmission efficiency of the whole optical communication system.

Step 802, the CP obtains second operation and maintenance information according to the first state information and the second state information.

For example, the CP receives the target uplink optical signal from the optical combiner, and performs processing such as photoelectric conversion and demodulation on the target uplink optical signal in sequence, so as to obtain first state information that is transmitted through an optical fiber link between the CP and the AP and is carried in an uplink system spectrum. The CP obtains pre-stored second state information, and as shown in step 801, the first state information modulated by the AP on each uplink subcarrier is a sequence, the second state information is also a sequence, and the first state information sent from the CP is the same as the second state information pre-stored by the AP. The CP may obtain second operation and maintenance information according to the first state information and the pre-stored second state information received via the optical fiber link, where the second operation and maintenance information includes channel characteristics between the CP and the AP, and specific description of the second state information, and a process of obtaining the second operation and maintenance information according to the first state information and the second state information, please refer to a description corresponding to fig. 2, which is not described in detail.

Step 803, the CP sends the second operation and maintenance information to the AP.

The CP may transmit the second operation and maintenance information to the AP by broadcasting. Specifically, the CP may select a downlink subcarrier as the first operation and maintenance subcarrier for transmitting the second operation and maintenance information, and the description of the CP selecting the first operation and maintenance subcarrier shown in this embodiment is please refer to the description of the AP selecting the first operation and maintenance subcarrier shown in step 203 corresponding to fig. 2, which is not described in detail.

Step 804, the AP obtains target second operation and maintenance information corresponding to the target time slot.

In this embodiment, the AP receives second operation and maintenance information from the CP, for example, the AP103 obtains target second operation and maintenance information corresponding to the AP 103. Specifically, the AP103 obtains the target time slot (e.g., time slot 1 allocated to the AP103 shown in fig. 5) allocated to the AP103 by the CP, and when the AP receives the second operation and maintenance information from the CP, the AP obtains the operation and maintenance information corresponding to the target time slot (e.g., time slot 1 shown in fig. 5) as the target second operation and maintenance information in the second operation and maintenance information. It can be understood that the target second operation and maintenance information is obtained by the AP103, and in the target time slot, a change curve of the change amount between the first state information and the second state information along with the frequency is described for the target second operation and maintenance information, and the description of the target first operation and maintenance information corresponding to fig. 2 is also referred to, and details are not repeated.

And step 805, the AP modulates the uplink service on the target service sub-carrier according to the target second operation and maintenance information.

In this embodiment, when the AP obtains the corresponding target second operation and maintenance information, the AP may obtain the channel characteristic between the CP and the AP according to the target second operation and maintenance information, and the AP further modulates the uplink service on the target service subcarrier according to the channel characteristic between the CP and the AP, where the target service subcarrier is any uplink subcarrier in the target frequency resource and the target time slot allocated to the AP by the CP.

Specifically, the AP modulates the uplink service on the target service subcarrier according to the attribute parameter of the uplink service according to the target second operation and maintenance information, where the attribute parameter is at least one of the following:

signal to noise ratio, modulation rate, modulation format, or modulation order.

The process of modulating the uplink service on the target service subcarrier by the AP according to the target second operation and maintenance information, please refer to the process of modulating the downlink service on the target service subcarrier by the CP shown in step 205 corresponding to fig. 2 according to the target first operation and maintenance information, which is not described in detail.

Step 806, the AP sends an uplink service optical signal to the CP.

The AP modulates uplink service on uplink subcarriers allocated to the AP by the CP to obtain uplink electric signals, the AP performs electric-to-optical conversion on the uplink electric signals to obtain uplink service optical signals, and the AP sends the uplink service optical signals to the CP through the optical combiner.

With the method shown in this embodiment, the AP can trigger the CP to obtain second operation and maintenance information indicating a channel characteristic between the CP and the AP by transmitting the first state information to the CP. The AP can timely acquire the channel characteristics between the CP and the AP according to the second operation and maintenance information, so that the timeliness and the operation and maintenance efficiency of operation and maintenance of the channel are improved, channel faults between the CP and the AP can be timely and accurately positioned, and the fault positioning accuracy is improved. In addition, the AP shown in the embodiment performs operation and maintenance through the second operation and maintenance information, so that automatic operation and maintenance of the channel are realized, excessive participation of manpower is not needed in the operation and maintenance process, operation and maintenance efficiency is improved, and complexity of operation and maintenance is reduced. The AP effectively improves the bandwidth utilization rate of the uplink system frequency spectrum according to uplink service modulated on the uplink subcarriers corresponding to the channel characteristics between the CP and the AP, and modulates the uplink service based on the channel characteristics corresponding to each uplink subcarrier, thereby reducing signal distortion and improving the robustness of signals.

In the above embodiment, taking the operation and maintenance information as the channel characteristic between the CP and the AP as an example, in the embodiment shown in fig. 9, the operation and maintenance information may be further related to at least one of the characteristic of the AP, the characteristic of the CP, or the characteristic of the optical fiber link between the AP and the CP, where fig. 9 is a step flowchart of still another embodiment of the operation and maintenance method provided in the present application.

Step 901, the second optical communication device sends second status information to the first optical communication device.

For example, the first optical communication device shown in this embodiment may be a CP, where the second optical communication device is an AP, and for another example, the first optical communication device is an AP, where the first optical communication device is a CP. For a better understanding, the structures of the first optical communication system and the second optical communication apparatus will be described with reference to fig. 10, where fig. 10 is a structural example diagram of another embodiment of the optical communication system provided in the present application.

The first optical communication device 1000 in this embodiment includes a first processor 1010 and an optical module 1001 connected to the first processor 1010, where the first processor 1010 may be a central processing unit (central processing unit, CPU), an application-specific integrated circuit (ASIC), a programmable logic device (programmable logic device, PLD), or a combination thereof. The PLD may be a complex programmable logic device (complex programmable logic device, CPLD), a field-programmable gate array (field-programmable gate array, FPGA), general-purpose array logic (generic array logic, GAL), or any combination thereof. The first processor 1010 may refer to one processor or may include multiple processors, which is not limited herein. The optical module 1001 includes a first transmitter 1003, a first modulation unit 1002, a first module parameter unit 1006, a first receiver 1004, a first demodulation unit 1005, a first failure analysis unit 1007, and a first sensing perception unit 1008. The first modulation unit 1002 is connected to the first processor 1010, and is configured to receive a service from the first processor 1010, where the first modulation unit 1002 is configured to modulate the service on a subcarrier to obtain a service electrical signal, and the first transmitter 1003 may be a semiconductor Laser (LD) or the like, and is configured to perform electro-optical conversion on the service electrical signal to output a service optical signal. The first receiver 1004 may be a Photodiode (PD) or the like for receiving a traffic optical signal from the second optical communication device and for photoelectrically converting the traffic optical signal to obtain a traffic electric signal, and the first demodulation unit 1005 is for demodulating the traffic electric signal to obtain a traffic. The first demodulation unit 1005 transmits the demodulated traffic to the first processor 1010. Each unit included in the optical module 1001 shown in this embodiment may be separately set or may be integrated in the same processor set, and for the description of the type of the processor included in the optical module 1001, please refer to the description of the type of the first processor 1010, which is not described in detail. Optionally, the first sensing unit 1008, the first module parameter unit 1006, and the first fault analysis unit 1007 in this embodiment may also be integrated into the first processor 1010. The second optical communication device includes a second processor 1030 and an optical module 1021 connected to the second processor 1030, where the optical module 1021 specifically includes a second receiver 1024, a second demodulation unit 1025, a second fault analysis unit 1027, a second transmitter 1203, a second modulation unit 1022, a second module parameter unit 1026, and a second sensing unit 1028, and for the description of the structure of the second optical communication device 1020, please refer to the description of the structure of the first optical communication device 1000, and details are not repeated.

The second module parameter unit 1026 of the second optical communication device 1020 is configured to collect second status information of the optical module 1021, where the second status information includes at least one of the following items of the optical module 1021:

the type of the second state information is not limited in this embodiment, as long as the second state information is related to the optical module 1021, such as a module type, a wavelength, a serial number, a manufacturer, an outgoing optical power, a receiving optical power, an operating temperature, an operating voltage, a bias current, or a transmission distance. The first module parameter unit 1026 sends the acquired second state information to the second modulation unit 1022.

Optionally, the optical module 1021 in this embodiment may include a second sensing unit 1028, where the second sensing unit 1028 is implemented by an optical time-domain reflectometer (optical time-domain reflectometer, OTDR), and the second sensing unit 1028 is configured to detect second status information, where the second status information is related to an optical fiber link between the first optical communication device 1000 and the second optical communication device 1020, for example, the second status information of the optical fiber link detected by the second sensing unit 1028 may be at least one of the following:

the length of the optical fiber link, the position of the break point of the optical fiber link, the insertion loss of the optical fiber link or the position information of the optical fiber link. Based on the state information detected by the OTDR, whether the optical fiber link is excessively bent or not can be timely found, the optical fiber link is pressed to be broken, whether the optical fiber joint of the optical fiber link is in poor contact or not and the like.

In this embodiment, for example, the OTDR is integrated with the optical module 1021, and in other examples, the OTDR and the optical module 1021 may be separately provided, that is, the OTDR is connected with the optical module 1021, and the OTDR sends the detected second state information to the second modulation unit 1022 of the optical module 1021.

The second modulating unit 1022 may modulate the second state information on the second operation and maintenance subcarrier after receiving the second state information, and for the description of the second operation and maintenance subcarrier, please refer to the description of the first operation and maintenance subcarrier in the above embodiment, details are not repeated. The second operation sub-carrier shown in the embodiment may also adjust the first operation information shown in fig. 2 or the second operation information shown in fig. 8, and the detailed description is omitted herein specifically with reference to the embodiment shown in fig. 2 or fig. 8.

Step 902, the second optical communication apparatus sends first status information to the first optical communication apparatus.

The second optical communication device shown in this embodiment can continuously detect the optical module and/or the optical fiber link of the second optical communication device to obtain the first state information. For the description of the first status information and the procedure of the second optical communication device obtaining the first status information, please refer to step 901, which is not described in detail. It will be appreciated that the second optical communication device detects the second state information at a time earlier than the first state information.

Step 903, the first optical communication device obtains third operation and maintenance information according to the first state information and the second state information.

Taking the first status information as an example, the first receiver 1004 of the first optical communication device 1000 and the second transmitter 1203 of the second optical communication device 1020 are connected by an optical fiber link, the second modulation unit 1022 transmits the optical signal of the modulated first status information to the first receiver 1004 via the optical fiber link, the first receiver 1004 photoelectrically converts the optical signal to obtain an electrical signal and transmits the electrical signal to the first demodulation unit 1005, and the first demodulation unit 1005 demodulates the electrical signal to obtain the first status information and transmits the first status information to the first failure analysis unit 1007. It is understood that in the case where the first failure analysis unit 1007 obtains the first state information and the second state information, analysis can be performed by the first state information and the second state information to obtain the third operation and maintenance information.

For example, if the first state information and the second state information are both related to the optical module 1021, the first failure analysis unit 1007 can obtain third operation and maintenance information related to the optical module 1021 according to the first state information and the second state information, and the first optical communication apparatus 1000 can perform operation and maintenance on the optical module 1021 according to the third operation and maintenance information, for example, analyze the operation performance of the optical module 1021 according to the third operation and maintenance information, and, for example, determine whether the optical module 1021 has a failure or not according to the third operation and maintenance information. Specifically, if the first state information and the second state information are both the output optical power of the optical module 1021 of the second optical communication device 1020. When the first failure analysis unit 1007 determines that the difference between the output optical power of the optical module 1021 indicated by the second state information and the output optical power of the optical module 1021 indicated by the first state information is excessive, the third operation and maintenance information generated by the first failure analysis unit 1007 is used to indicate the possibility of failure of the optical module 1021. Optionally, the first fault analysis unit 1007 continuously detects the output optical power of the optical module 1021 according to the state information, so as to count the trend of the output optical power of the optical module 1021, and further determine whether the optical module 1021 has a fault according to the trend of the output optical power of the optical module 1021.

As another example, the first transmitter 1003 of the first optical communication device 1000 transmits a first outgoing optical power, which is an optical power of an optical signal transmitted by the first transmitter 1003, to the second receiver 1024. The second receiver 1024 of the second optical communication apparatus 1020 performs photoelectric conversion on the optical signal from the first transmitter 1003 to obtain an electrical signal, and sends the electrical signal to the second demodulation unit 1025, and the second demodulation unit 1025 demodulates the electrical signal to obtain the first outgoing optical power. The second demodulation unit 1025 transmits the first outgoing optical power to the second modulation unit 1022. The second modulation unit 1022 transmits the first outgoing optical power as second state information to the second transmitter 1203, and the second transmitter 1203 transmits the second state information to the first receiver 1004 of the first optical communication apparatus 1000. The first demodulation unit 1005 demodulates the electrical signal from the first receiver 1004 to obtain the first output optical power, and so on, and the first optical communication apparatus 1000 can obtain the second output optical power through the received first status information, where the second output optical power is the optical power of the optical signal sent by the first transmitter 1003. As can be seen from the above, the first fault analysis unit 1007 can monitor whether the first transmitter 1003 works normally, whether the performance of the first transmitter 1003 is abnormal, whether the optical fiber link can normally transmit optical signals, and the like according to the first outgoing optical power and the second outgoing optical power, so as to realize early warning of the service life of the first transmitter 1003, diagnosis of the whole optical fiber link, and the like.

For another example, if the first state information and the second state information are both related to the optical fiber link, the first failure analysis unit 1007 can determine whether the optical fiber link fails according to the first state information and the second state information.

In the present embodiment, the first fault analysis unit 1007 may preset an artificial intelligence (artificial intelligence, AI) model, and the first fault analysis unit 1007 inputs the obtained first and second state information to the AI model, and the AI model performs the first and second state information to obtain the third operation and maintenance information.

The first failure analysis unit 1007 transmits third operation and maintenance information indicating whether the optical module 1021 and/or the optical fiber link fails to the network management apparatus.

Optionally, the first module parameter unit 1006 of the first optical communication device 1000 shown in this embodiment may send the collected state information of the optical module 1001 and/or the state information collected by the first sensing unit 1008 to the first fault analysis unit 1007, where the first fault analysis unit 1007 can detect whether the optical module 1001 of the first optical communication device 1000 has a fault.

In this embodiment, the first optical communication device obtains the corresponding third operation and maintenance information according to the two state information (i.e., the first state information and the second state information) from the second optical communication device, which are shown in the foregoing description, and the number of the state information obtained by the first optical communication device from the second optical communication device is not limited. The state information shown in the embodiment can be transmitted to the first optical communication device through the second operation and maintenance subcarrier, so that the bandwidth utilization rate of the first optical communication device and the second optical communication device is improved. The second optical communication device sends the state information through the second operation and maintenance subcarrier in the process of sending the service to the first optical communication device, and the purpose of early warning before the occurrence of faults can also be achieved, namely, in the process that the first optical communication device carries out operation and maintenance according to the second optical communication device, the service sent by the second optical communication device to the first optical communication device is in a normal transmission state, and the condition that the service is interrupted due to operation and maintenance is effectively avoided.

The second optical communication device shown in this embodiment may also receive the status information from the first optical communication device, and further obtain operation and maintenance information related to the first optical communication device and/or obtain operation and maintenance information related to the optical fiber link according to the status information from the first optical communication device, where the specific process refers to the description of the process of the first optical communication device obtaining the third operation and maintenance information shown in this embodiment, which is not described in detail.

In the above embodiment, the optical communication system applied by the operation and maintenance method is taken as an example of the type of the F-TDMA network, the type of the optical communication system applied by the above method embodiment may also be a multipoint-to-multipoint optical network architecture, and fig. 11 is a structural example diagram of another embodiment of the optical communication system provided in the present application.

The optical communication system shown in the present embodiment includes a plurality of first optical communication apparatuses 1101 and a plurality of second optical communication apparatuses 1103, and the number of the first optical communication apparatuses 1101 and the second optical communication apparatuses 1102 is not limited in the present embodiment. Each first optical communication device 1101 of the plurality of first optical communication devices 1101 is connected to the optical combiner 1102, and each second optical communication device 1103 of the plurality of second optical communication devices 1103 is connected to the optical combiner 1102. If the first optical communication apparatus 1101 is a CP, the second optical communication apparatus 1103 is an AP. If the first optical communication device 1101 is an AP, the second optical communication device 1103 is a CP, for the description of the AP and the CP, please refer to the corresponding description of fig. 1, and details are not repeated. The first optical communication device 1101 and the second optical communication device 1103 may communicate with each other by a time division multiple access method or a frequency division multiple access method, which is not particularly limited. The process of executing the operation and maintenance method between each first optical communication device 1101 and each second optical communication device 1103 is shown in the above method embodiment, and will not be described in detail.

The network type of the optical communication system applied in the above method embodiment may also be a point-to-point single fiber bidirectional network architecture, and fig. 12 is a structural example diagram of another embodiment of the optical communication system provided in the present application.

The optical communication system shown in the present embodiment includes a first optical communication apparatus 1201 and a second optical communication apparatus 1202, and the first optical communication apparatus 1201 and the second optical communication apparatus 1202 are connected by a single fiber 1203 that realizes bidirectional transmission. For a description of the device types of the first optical communication device 1201 and the second optical communication device 1202, please refer to fig. 11, and detailed description is omitted. The first optical communication device 1201 and the second optical communication device 1202 can communicate by frequency division multiplexing. The process of performing the operation and maintenance method between the first optical communication device 1201 and the second optical communication device 1202 is shown in the above-mentioned method embodiment, and will not be described in detail.

The network type of the optical communication system applied in the above method embodiment may also be a point-to-point dual-fiber bidirectional network architecture, and fig. 13 is a structural example diagram of another embodiment of the optical communication system provided in the present application.

The optical communication system shown in this embodiment includes a first optical communication device 1301 and a second optical communication device 1302, where the first optical communication device 1301 and the second optical communication device 1302 are connected by two optical fibers, that is, the first optical communication device 1301 sends an optical signal to the second optical communication device 1302 through a first optical fiber 1311. The second optical communication apparatus 1302 transmits optical signals to the first optical communication apparatus 1301 via a second optical fiber 1310. For a description of the device types of the first optical communication device 1301 and the second optical communication device 1302, please refer to fig. 11, and detailed description is omitted. The first optical communication device 1301 and the second optical communication device 1302 may communicate by frequency division multiplexing. The process of performing the operation and maintenance method between the first optical communication device 1301 and the second optical communication device 1302 is shown in the above-mentioned method embodiment, which is not described in detail.

The present application provides a network device, referring to fig. 14, where fig. 14 is a structural example diagram of an embodiment of the network device provided in the present application. The network device 1400 may be a switch or router or the like. It should be appreciated that the specific implementation of the CP device of the CP101 in the optical communication system shown in fig. 1 may refer to the internal structure of the network device 1400 shown in fig. 14. Alternatively, the specific implementation of the AP-side device of each AP in the optical communication system shown in fig. 1 may refer to the internal structure of the network device 1400 shown in fig. 14. The network device 1400 may include a processor 1401 and a transceiver 1402, the processor 1401 being coupled to the transceiver 1402. The network device 1400 supports passive optical network (passive optical network, PON) interfaces, which can be directly connected to optical modules. For example, the first optical module shown in fig. 1 may be directly inserted into the board card of the network device 1400. For a description of the type of the processor 1401, please refer to fig. 10, and detailed description thereof is omitted.

The transceiver 1402 may also be referred to as a transceiver unit, a transceiver device, or the like. Alternatively, a device for implementing a receiving function in the transceiver unit may be regarded as a receiving unit, and a device for implementing a transmitting function in the transceiver unit may be regarded as a transmitting unit, that is, the transceiver unit includes a receiving unit and a transmitting unit, where the receiving unit may also be referred to as a receiver, an input port, a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, or a transmitting circuit, etc.

Optionally, the network device 1400 further comprises a memory 1403. Wherein the processor 1401 is coupled to the memory 1403. The memory 1403 is mainly used for storing software programs and data. The memory 1403 may be separate and coupled to the processor 1401. Alternatively, the memory 1403 may be integrated with the processor 1401, such as within one or more chips. The memory 1403 is capable of storing program codes for executing the technical solutions of the embodiments of the present application, and is controlled to execute by the processor 1401, and various types of executed computer program codes can also be regarded as drivers of the processor 1401. Memory 1403 may include volatile memory (RAM), such as random-access memory (RAM); the memory may also include a nonvolatile memory (non-volatile memory), such as a read-only memory (ROM), a flash memory (flash memory), a hard disk (HDD) or a Solid State Drive (SSD); the memory 1403 may also include a combination of the above types of memories. The memory 1403 may be one memory or may include a plurality of memories. Illustratively, the memory 1403 is configured to store status information and the like shown in the above-described method embodiments.

In one implementation, memory 1403 has stored therein computer readable instructions, including a plurality of software modules. The processor 1401 invokes the aforementioned computer readable instructions to execute the CP or AP function, and the specific execution process is shown in the above method embodiment, which is not described in detail.

The application also provides a chip as shown in fig. 15, wherein fig. 15 is a structural example diagram of an embodiment of the chip provided in the embodiment of the application. The chip 1500 includes at least one logic circuit 1501 and an input-output interface 1502. The input/output interface 1502 is used for inputting an electrical signal to be processed and an electrical signal processed. In one implementation, the logic is configured to perform some or all of the functions of the method embodiments described above. For example, in the embodiment shown in fig. 10, the chip may be used to implement the functions of at least one of the first sensing unit 1008, the first module parameter unit 1006, and the first failure analysis unit 1007. Alternatively, the chip 1500 may be integrated into the first optical module or the CP-side device shown in fig. 1, or may be integrated into the second optical module or the AP-side device shown in fig. 1.

The chip may be, for example, a System On Chip (SOC), and is not limited in particular herein.

The above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. An operation and maintenance method, characterized in that the method comprises:

the first optical communication device receives first status information from the second optical communication device;

the first optical communication device obtains operation and maintenance information according to the first state information and the pre-stored second state information, wherein the operation and maintenance information is related to the characteristics of the second optical communication device and/or is related to the characteristics of an optical fiber link between the first optical communication device and the second optical communication device.

2. The method of claim 1, wherein the first status information and the second status information are each a sequence, and wherein the operation and maintenance information includes channel characteristics between the first optical communication device and the second optical communication device.

3. The method of claim 2, wherein the first optical communication device receiving the first status information from the second optical communication device comprises:

the first optical communication system receives the first state information through all frequency resources of a system spectrum, wherein the system spectrum corresponds to the baud rate of the second optical communication device.

4. A method according to claim 2 or 3, characterized in that the operation and maintenance information is a frequency-dependent change in the amount of change between the first state information and the second state information, the change being in phase or amplitude.

5. The method according to any one of claims 1 to 4, wherein after the first optical communication device obtains the operation and maintenance information according to the first state information and the pre-stored second state information, the method further comprises:

the first optical communication device modulates the operation and maintenance information on a first operation and maintenance subcarrier to obtain a first modulated optical signal;

the first optical communication device transmits the first modulated optical signal to the second optical communication device.

6. The method of claim 5, wherein before the first optical communication device transmits the first modulated optical signal to the second optical communication device, the method further comprises:

The first optical communication device receives a subcarrier indication message from the second optical communication device, where the subcarrier indication message is used to indicate the first operation and maintenance subcarrier.

7. The method of claim 5, wherein the first operational subcarrier is a subcarrier predetermined by the first optical communication device.

8. The method according to any one of claims 5 to 7, further comprising:

the first optical communication device modulates a service on a service subcarrier to obtain a service optical signal, the service subcarrier being different from the first operation and maintenance subcarrier;

the first optical communication device sends the service optical signal to the second optical communication device.

9. The method of claim 8, wherein a center frequency of the first operation and maintenance subcarrier is less than a center frequency of the traffic subcarrier.

10. The method of claim 1, wherein the first optical communication device receiving the first status information from the second optical communication device comprises:

the first optical communication device receives a second modulated optical signal from the second optical communication device;

The first optical communication device demodulates the second modulated optical signal to obtain the first state information modulated on a second operation and maintenance subcarrier, where the second operation and maintenance subcarrier belongs to a part of frequency resources of a system spectrum, and the system spectrum corresponds to the baud rate of the second optical communication device, where the first state information and the second state information are respectively state information of an optical module included in the second optical communication device, and/or the first state information and the second state information are respectively collected by an optical time domain reflectometer OTDR and are respectively state information of an optical fiber link between the first optical communication device and the second optical communication device.

11. An operation and maintenance method, characterized in that the method comprises:

the second optical communication device sends first state information to the first optical communication device, wherein the first state information is used for indicating the first optical communication device to obtain operation and maintenance information according to the first state information, and the operation and maintenance information is related to the characteristics of the second optical communication device and/or the characteristics of an optical fiber link between the first optical communication device and the second optical communication device.

12. The method of claim 11, wherein the first status information and the second status information are each a sequence, and wherein the operation and maintenance information includes channel characteristics between the first optical communication device and the second optical communication device.

13. The method of claim 12, wherein the second optical communication device transmitting the first status information to the first optical communication device comprises:

the second optical communication device transmits the first state information through all frequency resources of a system spectrum, wherein the system spectrum corresponds to the baud rate of the second optical communication device.

14. The method according to claim 12 or 13, wherein the operation and maintenance information is a change amount between the first state information and the second state information with respect to frequency, the change amount being a phase or an amplitude.

15. The method of claims 11 to 14, wherein after the second optical communication device transmits the first status information to the first optical communication device, the method further comprises:

the second optical communication device receives a first modulated optical signal from the first optical communication device;

The second optical communication device demodulates the first modulated optical signal to obtain the modulated operation and maintenance information on the first operation and maintenance subcarrier.

16. The method of claim 15, wherein after demodulating the first modulated optical signal by the second optical communication device to obtain the operation and maintenance information modulated on a first operation and maintenance subcarrier, the method further comprises:

the second optical communication device obtains a target frequency band, wherein the target frequency band is used for interaction service between the first optical communication device and the second optical communication device, and the target frequency band comprises at least one service subcarrier;

the second optical communication device obtains target operation and maintenance information, wherein the target operation and maintenance information is a change curve of a change amount between the first state information and the second state information along with frequency in a frequency range of a target service subcarrier, the change amount is a phase or an amplitude, and the target service subcarrier is any one of the at least one service subcarrier;

and the second optical communication equipment modulates the service on the target service subcarrier according to the target operation and maintenance information.

17. The method of claim 16, wherein the second optical communication device modulating the traffic on the target traffic subcarrier in accordance with the target operation and maintenance information comprises:

The second optical communication device modulates the service on the target service subcarrier according to the attribute parameters of the service according to the target operation and maintenance information, wherein the attribute parameters are at least one of the following:

signal to noise ratio, modulation rate, modulation format, or modulation order.

18. The method of any of claims 15 to 17, wherein prior to the second optical communication device receiving the first modulated optical signal from the first optical communication device, the method further comprises:

the second optical communication device sends a subcarrier indication message to the first optical communication device, where the subcarrier indication message is used to indicate the first operation and maintenance subcarrier.

19. The method according to any one of claims 15 to 18, further comprising:

the second optical communication device receives the service optical signal from the first optical communication device;

the second optical communication device demodulates the service optical signal to obtain a modulated service on a service subcarrier, the service subcarrier being different from the first operation and maintenance subcarrier.

20. The method of claim 19, wherein a center frequency of the first operation and maintenance subcarrier is less than a center frequency of the traffic subcarrier.

21. The method of claim 11, wherein the second optical communication device transmitting the first status information to the first optical communication device comprises:

the second optical communication device modulates the first state information on a second operation and maintenance subcarrier to obtain a second modulated optical signal, the second operation and maintenance subcarrier belongs to part of frequency resources of a system spectrum, the system spectrum corresponds to the baud rate of the second optical communication device, wherein the first state information and the second state information are respectively the state information of an optical module included in the second optical communication device, and/or the first state information and the second state information are respectively the state information of an optical fiber link between the first optical communication device and the second optical communication device, which are acquired by an Optical Time Domain Reflectometer (OTDR).

22. An optical communication device, wherein the communication device comprises a processor and an optical module connected with the processor;

the optical module is used for receiving first state information from another optical communication device;

the processor is configured to obtain operation and maintenance information according to the first state information and the pre-stored second state information, where the operation and maintenance information is related to a feature of the second optical communication device and/or is related to a feature of an optical fiber link between the first optical communication device and the second optical communication device.

23. An optical communication device, wherein the communication device comprises a processor and an optical module connected with the processor;

the processor is configured to obtain first state information, where the first state information is used to instruct another optical communication device to obtain operation and maintenance information according to the first state information, where the operation and maintenance information is related to a feature of the optical communication device and/or is related to a feature of an optical fiber link between the optical communication device and the other optical communication device;

the optical module is configured to send the first status information to the other optical communication device.

24. An optical communication system, wherein the optical communication device comprises a first optical communication device and a second optical communication device;

the second optical communication device is configured to send first status information to the first optical communication device;

the first optical communication device is configured to receive the first status information from the second optical communication device;

the first optical communication device is configured to obtain operation and maintenance information according to the first state information and pre-stored second state information, where the operation and maintenance information is related to a feature of the second optical communication device and/or is related to a feature of an optical fiber link between the first optical communication device and the second optical communication device.