WO2023065817A1 - Capacity expansion method and apparatus, device and storage medium - Google Patents

Abstract

The present application provides a capacity expansion method and apparatus, a device and a storage medium, which belong to the technical field of optical communications. The method is applied in a coherent optical system. The system comprises a local point device and a plurality of access site devices, and the local point device and the plurality of access site devices are connected by means of an optical fiber ring. When capacity expansion requirements of at least one access site device is detected, the bandwidth required by each access site device is determined. The local point device and each access site device are controlled to use a subcarrier of a first wavelength for service communication, and on the basis of the bandwidth required by each access site device, subcarriers of a second wavelength are re-allocated for each access site device. The local point device and each access site device are notified to allocate the subcarrier of the second wavelength to each access site device. Employing the the present application, when expanding the capacity of access site devices, not only can lossless expansion be achieved, but the bandwidth of each access site device may also be used at maximum efficiency.

Description

Capacity expansion method, device, equipment and storage medium

This application claims priority to a Chinese patent application filed with the State Intellectual Property Office of China on October 22, 2021, with application number 202111233677.6 and titled "Method, device, device, and storage medium for capacity expansion", the entire contents of which are incorporated by reference in this application.

technical field

The present application relates to the technical field of optical communication, and in particular to a capacity expansion method, device, device and storage medium.

Background technique

In recent years, in order to reduce the number of modules in the MAN, the MAN has switched from a point-to-point (P2P) system to a point-to-multi-point (P2MP) coherent optical system. The P2MP coherent optical system includes a central office device (central office, CO) and multiple access point devices (access point, AP), and the central office device is referred to as the office device for short. In the P2MP coherent optical system, the office device and multiple APs are connected in series through a single optical fiber, and the frequency spectrum used by the office device to send data to multiple access site devices and the multiple access site devices to send data to the office device are different. , and the frequency spectrum used by each access site device is different (that is, the subcarriers used by each access site device are different). The services carried by some access site equipment may be upgraded, resulting in an increase in the service data transmitted by the access site equipment, so it is necessary to expand the capacity of the access site equipment, that is, to increase the usable spectrum for the access site equipment.

In the existing related technologies, when the capacity of the access site equipment is expanded, spectrum resources need to be redistributed, and the local oscillator of the site also needs to be switched accordingly, so that services will be interrupted.

Contents of the invention

The present application provides a method, device, device and storage medium for capacity expansion. When expanding the capacity of access site equipment, it can not only achieve non-destructive expansion without service interruption, but also use each access site equipment with maximum efficiency. bandwidth.

In the first aspect, the present application provides a method for capacity expansion, which is applied to a coherent optical system, and the system includes an office device and multiple access site devices, and the office device and the multiple access site devices are connected through an optical fiber Ring connection, the method includes: detecting the capacity expansion requirement of at least one access site device among the plurality of access site devices, determining the bandwidth required by each access site device, and controlling the communication between the office site device and each access site device The device performs service communication based on the subcarrier of the first wavelength, and allocates the subcarrier for each access site device based on the bandwidth required by each access site device and the association relationship between each access site device and the subcarrier of the second wavelength. The subcarrier of the second wavelength notifies the office device and each access site device of the subcarrier of the second wavelength allocated for each access site device.

In the scheme shown in this application, the office equipment and each access site equipment in the coherent optical system can use the subcarriers of the first wavelength and the subcarriers of the second wavelength for business communication, and expand the capacity of a certain access site equipment , the office device and each access site device use the subcarriers of the first wavelength for business communication to ensure that the service is not interrupted, and reassign the subcarriers of the second wavelength that can be used by the access site device. The expansion is complete. In this way, during capacity expansion, services will not be interrupted, and by reassigning subcarriers, the bandwidth of each access site device can be used with maximum efficiency, without the need for each access site device to support the entire office device. bandwidth.

In a possible implementation manner, before controlling the office device to perform service communication with each access site device based on the subcarrier of the first wavelength, it further includes: determining that the office device and each access site device are currently Perform service communication based on the subcarrier of the second wavelength; the control of the office device to perform service communication with each access site device based on the subcarrier of the first wavelength includes: based on the bandwidth required by each access site device and the association relationship between each access site device and the subcarrier of the first wavelength, allocate the subcarrier of the first wavelength for each access site device; control the site device and each access site device based on each The subcarriers of the first wavelength assigned by the access site equipment are used for business communication.

In the solution shown in this application, before reassigning the subcarriers of the second wavelength to each access site device, it is determined that the site device and each access site device are currently performing business communications based on the second wavelength subcarriers, first The subcarriers of the first wavelength are re-assigned to each access site device, so that the site device and each access site device use the reallocated subcarriers of the first wavelength to perform service communication. In this way, in the case of currently using the subcarriers of the second wavelength for business communication, first reassign the subcarriers of the first wavelength, and then switch to using the subcarriers of the first wavelength for business communication, so that when the second wavelength is redistributed After the subcarriers of the first wavelength are used, there is no need to reallocate the subcarriers of the first wavelength.

In a possible implementation manner, controlling the office device to communicate with each access site device based on the subcarrier of the first wavelength includes: controlling the office device to communicate with each access site device based on the current Subcarriers of the first wavelength allocated by each access site device for service communication; after notifying the office site device and each access site device of the subcarriers of the second wavelength allocated for each access site device, it also includes : control the site device to perform business communication with each access site device based on the subcarrier of the second wavelength allocated for each access site device; based on the bandwidth required by each access site device and each interface The association relationship between the inbound site device and the subcarrier of the first wavelength, and re-allocate the subcarrier of the first wavelength for each access site device; notify the office site device and each access site device for each access site Subcarriers of the first wavelength allocated by the device.

In the solution shown in this application, before the subcarriers of the second wavelength are reassigned, the office equipment is directly controlled to use the subcarriers of the first wavelength to perform service communication with each access site equipment. After reallocating the subcarriers of the second wavelength, the control office device and each access site device use the reallocated subcarriers of the second wavelength for business communication, and reallocate the subcarriers of the first wavelength. In this way, since the subcarriers of the second wavelength are reallocated first, the subcarriers of the second wavelength can be quickly reallocated.

In a possible implementation manner, the method further includes: sending a capacity expansion completion message to the office device and each access site device, where the capacity expansion completion message indicates that the subcarriers of the first wavelength and the subcarriers of the second wavelength All subcarriers can be used for business communication. In this way, the access site device can choose to use the subcarrier of the first wavelength or the subcarrier of the second wavelength for service communication.

In a possible implementation manner, the second wavelength is allocated to each access site device based on the bandwidth required by each access site device and the association relationship between each access site device and the subcarrier of the second wavelength. The sub-carrier of the wavelength includes: assigning the sub-carrier of the second wavelength to each access site device based on the bandwidth required by each access site device and the sub-carrier of the second wavelength supported by each access site device or, based on the bandwidth required by each access site device, the subcarriers of the second wavelength supported by each access site device, and the subcarriers of the second wavelength currently allocated to each access site device, for Each access site device allocates the subcarrier of the second wavelength.

In the solution shown in this application, when allocating subcarriers of the second wavelength to each access site device, the bandwidth required by each access site device and the supported subcarriers of the second wavelength can be considered, so that the The subcarriers of the second wavelength allocated by each access site device can be used by each access site device. Or, when allocating the subcarriers of the second wavelength for each access site device, the subcarriers of the second wavelength currently used by each access site device are also taken into consideration, so that each access site device can make the current The subcarriers of the second wavelength used are not adjusted.

In a possible implementation manner, before controlling the office device to perform service communication with each access site device based on the subcarrier of the first wavelength, it also includes: determining the bandwidth required by the multiple access site devices and not higher than the bandwidth of the subcarrier receiving the second wavelength by the office device. In this way, the subcarriers of the second wavelength are re-allocated only when it is ensured that the office equipment can support the capacity expansion of the access site equipment, so that the capacity expansion success rate is high.

In a possible implementation, the method further includes: determining that the sum of the bandwidths required by the multiple access site devices is higher than the bandwidth of the subcarrier receiving the second wavelength by the site device; The device receives the bandwidth of the subcarrier of the second wavelength. In this way, when the office equipment does not support expansion of the access site equipment, hardware expansion is performed on the office equipment.

In a possible implementation manner, the detecting the capacity expansion requirement of at least one access site device among the plurality of access site devices includes: when receiving the capacity expansion request sent by the at least one access site device, determining to detect To the capacity expansion requirement of the at least one access site device, the capacity expansion request indicates the required bandwidth increase or the required bandwidth of the at least one access site device; or, when receiving the service upgrade notification, it is determined that the at least one For a capacity expansion requirement of an access site device, the service upgrade notification indicates the required bandwidth increase or required bandwidth of the at least one access site device.

In the solution shown in this application, the capacity expansion requirement of at least one access site device can be detected in multiple ways, so that the capacity expansion requirement detection method is more flexible.

In a second aspect, the present application provides a device for capacity expansion, which has the function of realizing the above-mentioned first aspect or any optional manner of the first aspect. The device includes at least one module, and the at least one module is used to implement the capacity expansion method provided in the first aspect or any optional manner of the first aspect.

In a third aspect, the present application provides an expanded device, which includes a processor and a memory, wherein computer instructions are stored in the memory; the processor executes the computer instructions, so that the device executes the above-mentioned The capacity expansion method provided by one aspect or any optional mode of the first aspect.

In a fourth aspect, the present application provides a computer-readable storage medium, in which at least one computer instruction is stored, and the computer instruction is read by a processor to enable the expanded device to perform any of the above-mentioned first aspect or the first aspect. An optional way to provide scaling.

In a fifth aspect, the present application provides a computer program product, where the computer program product includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. The processor of the expanded device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the expanded device performs the expanded capacity provided by the first aspect or any optional method of the first aspect. method.

Description of drawings

FIG. 1 is a schematic diagram of communication between an existing office device and an access site device;

Fig. 2 is a schematic diagram of a coherent optical system provided by an exemplary embodiment of the present application;

Fig. 3 is a schematic diagram of a coherent optical system provided by an exemplary embodiment of the present application;

Fig. 4 is a schematic structural diagram of a coherent optical system provided by an exemplary embodiment of the present application;

FIG. 5 is a schematic diagram of service communication using a coherent optical system provided by an exemplary embodiment of the present application;

Fig. 6 is a schematic structural diagram of a device provided by an exemplary embodiment of the present application;

Fig. 7 is a schematic flowchart of a method for capacity expansion provided by an exemplary embodiment of the present application;

Fig. 8 is a schematic flowchart of a method for capacity expansion provided by an exemplary embodiment of the present application;

FIG. 9 is a schematic flowchart of a method for capacity expansion provided by an exemplary embodiment of the present application;

FIG. 10 is a schematic diagram of reallocating subcarriers of the first wavelength provided by an exemplary embodiment of the present application;

FIG. 11 is a schematic diagram of reallocating subcarriers of a second wavelength provided by an exemplary embodiment of the present application;

Fig. 12 is a schematic structural diagram of a capacity expansion device provided by an exemplary embodiment of the present application.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the implementation manners of the present application will be further described in detail below in conjunction with the accompanying drawings.

In recent years, in order to reduce the number of modules in the MAN, the MAN has switched from the P2P system to the P2MP coherent optical system. The P2P system is composed of multiple site devices and access site devices. The number of site devices is the same as the number of access site devices. One site device communicates with one access site device. Figure 1 provides a schematic diagram of a P2MP coherent optical system. The P2MP coherent optical system includes an office device and multiple access site devices. One office device communicates with multiple access site devices, which reduces the cost of office devices. number.

In the P2MP coherent optical system, the office device and multiple access site devices are connected in series through an optical fiber, and the office device sends data to multiple access site devices and multiple access site devices send data to the office device. The frequency spectrum is different, and the frequency spectrum used by each access point device is different (that is, the subcarriers used by each access point device are different). During the operation of the P2MP coherent optical system, the services carried by some access site equipment may be upgraded, resulting in an increase in the service data transmitted by the access site equipment, so it is necessary to expand the capacity of the access site equipment. When the access site device expands capacity, it selects idle subcarriers for the access site device to expand capacity. In this way, since the idle subcarriers at different times may be different, the coherent receiver of each access site device needs to cover the entire bandwidth of the office device, so that some bandwidth of the access site device may not be used all the time to waste bandwidth.

In this application, there are two communication paths between the office equipment and each access site equipment in the coherent optical system for business communication. When expanding the capacity of a certain access site equipment, the office equipment and each access site equipment Use one of the communication paths for business communication to ensure uninterrupted business. Re-allocate the sub-carriers that the access site equipment can use on another communication path (also can be considered as re-allocation of spectrum), and then the site equipment and each access site device use the re-allocated sub-carrier communication path for business communication , and the capacity expansion of the access site equipment is completed. In this way, during capacity expansion, services will not be interrupted, and by reassigning subcarriers, the bandwidth of each access site device can be used with maximum efficiency, without the need for each access site device to support the entire office device. bandwidth.

The following describes the P2MP coherent optical system involved in the embodiments of the present application. To simplify the description, the subsequent P2MP coherent optical system is referred to as the coherent optical system for short.

FIG. 2 provides a schematic diagram of a coherent optical system provided by an embodiment of the present application. As shown in Figure 2, the coherent optical system includes an office device 100 and multiple access site devices 200 (only 8 access site devices 200 are shown in Figure 2, the number of access site devices 200 in this embodiment of the application without limitation), with the office device 100 as the starting point and the end point, the office device 100 and multiple access site devices 200 are connected in series through two optical fibers, and the two optical fibers connect the office device 100 and multiple access site devices 200 in series The networking method of forming a ring and connecting them in series is called a horseshoe ring network. The two optical fibers are called the outer ring fiber and the inner ring fiber respectively. The office device 100 may be called an office node device or a master node device, and the access site device 200 may be called a leaf site device or a slave node device. Each access site device 200 includes two transceiver components, both of which are connected to two optical fibers. The two transceiver components include a first transceiver component and a second transceiver component. The first transceiver component is used to communicate with the office device 100 using the subcarrier of the first wavelength, and the second transceiver component is used to use the subcarrier of the second wavelength. Perform business communication with the office device 100 . That is to say, the office device 100 has two communication paths with multiple access site devices 200, the first communication path of the two communication paths uses subcarriers of the first wavelength for service communication, and the second communication path uses the subcarriers of the first wavelength. Two-wavelength sub-carriers are used for business communication. When the office device 100 communicates with multiple access site devices 200 using the first communication path, the downlink communication is performed through the outer ring optical fiber, and the uplink communication is performed through the inner ring optical fiber. Sending data, uplink communication means that the access site device 200 sends data to the site device 100 . When the office device 100 communicates with multiple access site devices 200 using the second communication path, the downlink communication is performed through the inner ring optical fiber, and the uplink communication is performed through the outer ring optical fiber. Alternatively, when the office device 100 communicates with multiple access site devices 200 using the first communication path, the downlink communication is performed through the inner ring optical fiber, and the uplink communication is performed through the outer ring optical fiber. When the office device 100 communicates with multiple access site devices 200 using the second communication path, downlink communication is performed through the outer ring optical fiber, and uplink communication is performed through the inner ring optical fiber. The previous method will be described later as an example. The spectrum of each subcarrier of the first wavelength does not overlap, and the frequency spectrum of each subcarrier of the second wavelength does not overlap. Both the first wavelength and the second wavelength are single wavelengths.

In the coherent optical system shown in FIG. 2 , in one implementation, the office device 100 includes a first sub-office device 101 and a second sub-office device 102 . Refer to the coherent optical system shown in FIG. 3 . As shown in FIG. 3 , the first sub-office device 101 and each access site device 200 use subcarriers of the first wavelength for business communication, and the second sub-office device 102 and each access site device 200 use the second The sub-carriers of the wavelength carry out business communication. Here, each sub-office device is equivalent to one office device, and the first sub-office device 101 and the second sub-office device 102 are backups of each other. In addition, the site device 100 further includes a network element electrical layer veneer, and the network element electrical layer veneer is connected to the first sub-office device 101 and the second sub-office device 102 respectively. The electrical layer board of the network element can choose to receive the data sent by the access site device 200 from the first sub-office device 101 or from the second sub-office device 102 .

In another implementation, the office device 100 includes a main transceiver module and a backup transceiver module. The main transceiver module and each access site device 200 use the subcarrier of the first wavelength to perform business communication, and the standby transceiver module and each access site device 200 use the subcarrier of the second wavelength to perform business communication, where the main transceiver module and The backup transceiver modules are mutually backup. In addition, the office device 100 also includes a network element electrical layer single board, and the network element electrical layer single board is connected to the main transceiver module and the standby transceiver module respectively. The electrical layer board of the network element can choose to receive data sent by the access site device 200 from the main transceiver module or the backup transceiver module.

In another implementation, the site device 100 includes a transceiver module, and the transceiver module performs service communication with each access site device 200 using a subcarrier of the first wavelength, and performs service communication using a subcarrier of the second wavelength. .

Exemplarily, the embodiment of the present application also provides a structure in which the office device 100 includes a first sub-office device 101 and a second sub-office device 102 .

The first sub-office device 101 includes a first light source module 1011 , a first receiving module 1012 , a first sending module 1013 and a first optical digital signal processing (optical digital signal process, oDSP) 1014 . The first light source module 1011 is respectively connected to the first receiving module 1012 and the first sending module 1013 through optical fibers. The first receiving module 1012 is connected to the inner ring fiber, and the first sending module 1013 is connected to the outer ring fiber. The first oDSP 1014 is connected to the first receiving module 1012 and the first sending module 1013 respectively. The first light source module 1011 includes a first laser and a first 1×2 optical coupler, the first laser is connected to the first 1×2 optical coupler through an optical fiber, and the first 1×2 optical coupler is connected to the first receiving module 1012 and The first sending modules 1013 are respectively connected through optical fibers. The first laser is used to emit light of a first wavelength.

The second sub-office device 102 includes a second light source module 1021 , a second receiving module 1022 , a second sending module 1023 and a second oDSP 1024 . The second light source module 1021 is respectively connected to the second receiving module 1022 and the second sending module 1023 through optical fibers. The second receiving module 1022 is connected to the outer ring fiber, and the second sending module 1023 is connected to the inner ring fiber. The second oDSP 1024 is connected to the second receiving module 1022 and the second sending module 1023 respectively. The second light source module 1021 includes a second laser and a second 1×2 optical coupler, the second laser is connected to the second 1×2 optical coupler through an optical fiber, and the second 1×2 optical coupler is connected to the second receiving module 1022 and The second sending modules 1023 are respectively connected through optical fibers. The second laser is used to emit light at a second wavelength.

Exemplarily, the present application also provides a structure in which the access site device 200 includes a first transceiving component 201 and a second transceiving component 202 .

The first transceiver unit 201 includes a first beam splitter 2011 , a third light source module 2012 , a first beam combiner 2013 , a third receiving module 2014 , a third sending module 2015 and a third oDSP 2016 . The first beam splitter 2011 is connected to the outer ring optical fiber, and the first beam splitter 2011 is connected to the third receiving module 2014 through the optical fiber. The third light source module 2012 is respectively connected to the third receiving module 2014 and the third sending module 2015 through optical fibers. The third sending module 2015 is connected to the first beam combiner 2013 . The first beam combiner 2013 is connected to the inner ring optical fiber. The third light source module 2012 includes a third laser and a third 1×2 optical coupler, the third laser is connected to the third 1×2 optical coupler through an optical fiber, and the third 1×2 optical coupler is connected to the third receiving module 2014 and The third sending modules 2015 are respectively connected through optical fibers. The third laser emits light of a third wavelength. The third wavelength includes a center wavelength of at least one of the subcarriers of the first wavelength. The third oDSP 2016 is connected to the third receiving module 2014 and the third sending module 2015 respectively. When working at the same time, the third wavelengths corresponding to each access site device are different.

The second transceiver unit 202 includes a second beam splitter 2021 , a fourth light source module 2022 , a second beam combiner 2023 , a fourth receiving module 2024 , a fourth sending module 2025 and a fourth oDSP 2026 . The second beam splitter 2021 is connected to the inner ring optical fiber, and the second beam splitter 2021 is connected to the fourth receiving module 2024 through the optical fiber. The fourth light source module 2022 is connected to the fourth receiving module 2024 and the fourth sending module 2025 respectively. The fourth sending module 2025 is connected to the second beam combiner 2023 . The second beam combiner 2023 is connected to the outer ring optical fiber. The fourth light source module 2022 includes a fourth laser and a fourth 1×2 optical coupler, the fourth laser is connected to the fourth 1×2 optical coupler through an optical fiber, and the fourth 1×2 optical coupler is connected to the fourth receiving module 2024 and The fourth sending modules 2025 are respectively connected through optical fibers. The fourth laser is used to emit light with a fourth wavelength. The fourth wavelength includes a center wavelength of at least one of the subcarriers of the second wavelength. The fourth oDSP 2026 is connected to the fourth receiving module 2024 and the fourth sending module 2025 respectively. When working at the same time, the fourth wavelengths corresponding to each access site device are different.

The first beam splitter 2011 is connected to the second beam combiner 2023 through an optical fiber, and the second beam splitter 2021 is connected to the first beam combiner 2013 through an optical fiber.

Refer to FIG. 4 for a schematic structural diagram of the office device 100 and the access site device 200 described above. There are multiple access site devices 200 between the first sub-office device 101 and the second sub-office device 102 , and only one access site device 200 is shown in FIG. 4 .

In addition, the access site device 200 also includes a network element electrical layer veneer, and the network element electrical layer veneer is connected to the first transceiver unit 201 and the second transceiver unit 202 respectively, and is obtained from the first transceiver unit 201 or the second transceiver unit 202 data. The electrical layer single board of the network element can control the third oDSP 2016 to adjust the wavelength of the light emitted by the third light source module 2012 . The electrical layer single board of the network element can also control the fourth oDSP 2026 to adjust the wavelength of the light emitted by the fourth light source module 2022 .

On the basis of the office device 100 and the access site device 200 shown in FIG. 4 , FIG. 5 provides a process in which the first sub-office device 101 communicates with multiple access site devices 200 using the first communication path. . The first light source module 1011 provides light of the first wavelength to the first receiving module 1012 and the first sending module 1013, the first receiving module 1012 uses the light of the first wavelength as local oscillator light, and the first sending module 1013 uses the light of the first wavelength light as signal light. For example, the first laser emits light of the first wavelength, which is divided into two paths by the first 1×2 optical coupler, and sent to the first receiving module 1012 and the first sending module 1013 respectively. The third light source module 2012 provides the light of the third wavelength for the third receiving module 2014 and the third sending module 2015, the third receiving module 2014 uses the light of the third wavelength as local oscillator light, and the third sending module 2015 uses the light of the third wavelength light as signal light. For example, the light of the third wavelength emitted by the third laser is divided into two paths by the third 1×2 optical coupler, and sent to the third receiving module 2014 and the third sending module 2015 respectively. The third wavelength is the same as the central wavelength of the subcarrier received by the access site device 200 from the office device.

Downlink communication process: the first sending module 1013 uses multi-carrier modulation technology to modulate the data sent to each access site device 200 onto the light of the first wavelength to obtain multiple sub-carriers of the first wavelength. The data of the site device 200 corresponds to at least one subcarrier. Then the first sending module 1013 sends the multi-subcarriers of the first wavelength to the outer ring optical fiber. The first beam splitter 2011 receives the multi-subcarriers of the first wavelength from the outer ring optical fiber, divides the multi-subcarriers of the first wavelength into two bundles, and sends them to the third receiving module 2014 and the second beam combiner 2023 respectively. Dividing the multi-subcarriers of the first wavelength into two bundles is to divide the multi-subcarriers of the first wavelength into two bundles according to power. The third receiving module 2014 uses the light of the third wavelength as local oscillator light, coherently receives its corresponding subcarrier, and obtains the data sent to itself by the first sub-office device 101 . The second beam combiner 2023 receives subcarriers belonging to the second wavelength from the fourth sending module 2025, and receives multiple subcarriers of the first wavelength from the first beam splitter 2011, and combines the two received signals into one signal , and send to the first receiving component 201 of the next access site device 200 from the outer ring optical fiber.

Uplink communication process: when each access site device 200 sends data to the first sub-office device 101, the third sending module 2015 modulates the data onto the signal light of the third wavelength provided by itself, and obtains at least one of the first wavelength subcarrier. The third sending module 2015 sends at least one subcarrier of the first wavelength to the first beam combiner 2013 . The first beam combiner 2013 receives at least one subcarrier of the first wavelength, and receives the signal sent by the second beam splitter 2021, the signal may include multiple subcarriers of the second wavelength (wavelength of the second beam splitter 2021 signal), and at least one subcarrier of the first wavelength (the signal on which other access site equipment 200 waves), the two received signals are combined into one traveling signal, and sent to the inner ring optical fiber. At least one subcarrier of the first wavelength sent by multiple access site devices 200 forms multiple subcarriers of the first wavelength when reaching the first sub-office device 101 . The first receiving module 1012 uses the light of the first wavelength as local oscillator light, and coherently receives the multi-subcarriers of the first wavelength. The first oDSP 1014 obtains the data sent by multiple access point devices 200 through filtering. It should be noted here that since the first sub-office device 101 does not provide the local oscillator light of the second wavelength, even if the sub-carrier of the second wavelength is received, the data on the sub-carrier of the second wavelength will not be obtained .

Three access site devices 200 are shown in FIG. 5 , and the three access site devices 200 respectively use subcarrier 1 , subcarrier 2 and subcarrier 3 of the first wavelength to perform service communication with the first sub-office device 101 . In addition, the three access site devices 200 respectively use subcarrier 4, subcarrier 5, and subcarrier 6 of the second wavelength to perform service communication with the second sub-office device 102. Through the communication process shown in FIG. 5 , the office device 100 and the access site device 200 can conduct business communication through the subcarriers of the first wavelength and the subcarriers of the second wavelength. The above is only an optional method. This application Examples are not limited.

It should be noted that the bandwidth of the sub-carriers of the first wavelength received by the first sub-office device 101 is the same as the bandwidth of the sub-carriers of the second wavelength received by the second sub-office device 102 . Likewise, the bandwidth of the main transceiver module receiving the subcarriers of the first wavelength is the same as the bandwidth of the backup transceiver module receiving the subcarriers of the second wavelength.

The execution body of the expansion method is described below.

The execution subject of the capacity expansion method may be the capacity expansion device, which is referred to as the capacity expansion device for short. Optionally, the capacity expansion device is a hardware device. If the hardware device is the site device 100, or the hardware device is an upper layer device of the site device 100 (which can be considered as a management device), it can be called a capacity expansion device. Optionally, the capacity expansion device is a software device, for example, the capacity expansion device runs on the site device 100 , or the capacity expansion device runs on an upper layer device of the site device 100 .

The hardware structure when the capacity expansion device is a hardware device is introduced below, and the device 600 described below is the above-mentioned upper layer device, office device 100 and so on.

As shown in FIG. 6, device 600 is optionally implemented by a generic bus architecture. The device 600 includes at least one processor 601 , a communication bus 602 , a memory 603 and at least one network interface 604 .

The processor 601 is, for example, a general-purpose central processing unit (central processing unit, CPU), a network processor (network processor, NP), a graphics processing unit (graphics processing unit, GPU), a neural network processor (neural-network processing units, NPU) ), a data processing unit (data processing unit, DPU), a microprocessor, or one or more integrated circuits for implementing the solution of this application. For example, the processor 601 includes an application-specific integrated circuit (application-specific integrated circuit, ASIC), a programmable logic device (programmable logic device, PLD) or a combination thereof. The PLD is, for example, a complex programmable logic device (complex programmable logic device, CPLD), a field-programmable gate array (field-programmable gate array, FPGA), a general array logic (generic array logic, GAL) or any combination thereof.

Communication bus 602 is used to transfer information between the above-described components. The communication bus 602 can be divided into an address bus, a data bus, a control bus, and the like. For ease of representation, only one thick line is used in FIG. 6 , but it does not mean that there is only one bus or one type of bus.

Memory 603 is, for example, a read-only memory (read-only memory, ROM) or other types of static storage devices that can store static information and instructions, or a random access memory (random access memory, RAM) or a memory that can store information and instructions. Other types of dynamic storage devices, such as electrically erasable programmable read-only memory (EEPROM), compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc Storage (including Compact Disc, Laser Disc, Optical Disc, Digital Versatile Disc, Blu-ray Disc, etc.), magnetic disk storage medium, or other magnetic storage device, or is capable of carrying or storing desired program code in the form of instructions or data structures and capable of Any other medium accessed by a computer, but not limited to. The memory 603 exists independently, for example, and is connected to the processor 601 through the communication bus 602 . The memory 603 can also be integrated with the processor 601 .

Optionally, the memory 603 is used to store subcarriers used by each access site device.

Network interface 604 uses any transceiver-like device for communicating with other devices or a communication network. The network interface 604 includes a wired network interface, and may also include a wireless network interface. Wherein, the wired network interface may be an Ethernet interface, for example. The Ethernet interface can be an optical interface, an electrical interface or a combination thereof. The wireless network interface may be a wireless local area network (wireless local area networks, WLAN) interface, a network interface of a cellular network, or a combination thereof.

In a specific implementation, as an example, the processor 601 may include one or more CPUs.

In a specific implementation, as an example, device 600 may include multiple processors. Each of these processors can be a single-core processor (single-CPU) or a multi-core processor (multi-CPU). A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data such as computer program instructions.

In some embodiments, the memory 603 is used to store the program code 6031 for executing the expanded method in this application, and the processor 601 executes the program code 6031 stored in the memory 603 . That is, the device 600 can implement the capacity expansion method provided by the method embodiment through the processor 601 and the program code 6031 in the memory 603 .

The following describes the flow of the capacity expansion method. Figure 7 provides a schematic flow chart of the capacity expansion method. In Figure 7, the capacity expansion device is used as the upper-layer device of the site device 100 as an example. The site device mentioned later is the site device 100. The access site device is the access site device 200.

Step 701, detecting the capacity expansion requirement of at least one access site device among multiple access site devices, and determining the required bandwidth of each access site device.

In this embodiment, during the communication process between the office device and multiple access site devices, the capacity expansion apparatus can detect the capacity expansion requirement of at least one access site device. The capacity expansion device determines the bandwidth increase amount required by the at least one access site device. The capacity expansion device obtains the bandwidth required by each access site device last time, and increases the corresponding bandwidth increase on the basis of the bandwidth required by the at least one access site device last time, and obtains the bandwidth required by the at least one access site device. required bandwidth, while bandwidth required by other access site devices other than at least one access site device does not change. Alternatively, the capacity expansion apparatus determines the bandwidth required by the at least one access site device, and obtains the last bandwidth required by other access site devices. In this way, the capacity expansion device determines the bandwidth required by each access site device.

It should be noted that after each bandwidth adjustment, the capacity expansion device records the bandwidth required by each access site device. Optionally, the capacity expansion device may not record the bandwidth required by each access site device. When capacity expansion is performed each time, the capacity expansion device sends a bandwidth acquisition notification to the site device, and the site device sends at least one access Other access site devices other than the site device request the required bandwidth, and the site device sends the requested bandwidth to the capacity expansion device.

Exemplarily, in step 701, the capacity expansion device detects the capacity expansion requirement of at least one AP device in multiple ways, and two feasible ways are provided as follows.

Way 1: When receiving a capacity expansion request sent by at least one access site device, it is determined that the capacity expansion requirement of the at least one access site device has been detected, and the capacity expansion request indicates the bandwidth increase required by the at least one access site device or the required required bandwidth.

In this embodiment, when a certain access site device needs to perform service upgrade, the access site device sends a capacity expansion request to the site device through the subcarriers of the first wavelength and the subcarriers of the second wavelength, and the capacity expansion request Carry the address of the expansion device, and the expansion request carries the required bandwidth or bandwidth increase after the service upgrade. The required bandwidth is the bandwidth required by the access site equipment to transmit data after the service upgrade. The required bandwidth The increase is the increase in bandwidth brought about by service upgrades. For example, the current site equipment allocates 50G bandwidth to the access site equipment. After the service upgrade, 100G bandwidth is required. After the service upgrade, the required bandwidth is 100G, and the bandwidth increase required for the service upgrade is 50G. The network element electrical layer board of the office device obtains the access site device from the subcarrier of the first wavelength or the subcarrier of the second wavelength (that is, from the first sub-office device or the second sub-office device). After the capacity expansion request is sent, the capacity expansion request is forwarded to the capacity expansion device. After receiving the capacity expansion request, the capacity expansion device determines that the access site equipment needs to increase the bandwidth, and obtains the required bandwidth or bandwidth increase amount after service upgrade in the capacity expansion request. Based on this manner, the capacity expansion device detects a capacity expansion requirement of at least one access site device.

Mode 2: When receiving the service upgrade notification, it is determined that the capacity expansion requirement of at least one access site device is detected, and the service upgrade notification indicates the required bandwidth increase or required bandwidth of at least one access site device.

In this embodiment, when the service is upgraded, the manager inputs a service upgrade notice to the capacity expansion device, the service upgrade notice includes the required bandwidth or bandwidth increase of at least one access site device, and the at least one access site device is required Access site equipment for increased bandwidth. After receiving the service upgrade notification, the capacity expansion device determines to detect the capacity expansion requirement of the at least one access site device.

Alternatively, when the service is upgraded, the service management device at the upper layer sends a service upgrade notification to the capacity expansion device, and the service upgrade notification includes the required bandwidth or bandwidth increase of at least one access site device. After receiving the service upgrade notification, the capacity expansion device determines to detect the capacity expansion requirement of the at least one access site device.

It should be noted that the above are only two possible implementation manners, which are not limited in this embodiment of the present application.

In step 702, the control office device performs service communication with each access site device based on the subcarrier of the first wavelength.

In this embodiment, the capacity expansion device sends a notification to the office equipment, so that the network element electrical layer board of the office equipment selects to receive the data on the subcarrier of the first wavelength (that is, selects to receive the data received by the first sub-office equipment) data), and the network element electrical layer board of each access site device selects to receive the data on the subcarrier of the first wavelength (that is, selects to receive the data sent by the first sub-office device). During the communication process, the office device modulates the data of each access site device onto the signal light of the first wavelength, obtains the multi-subcarrier of the first wavelength, and sends the multi-subcarrier of the first wavelength to each access site device carrier. Each access site device uses the subcarrier of the first wavelength to send data to the office site device.

In addition, the office device can also modulate the data of each access site device onto the signal light of the second wavelength to obtain multiple subcarriers of the second wavelength, and send the multiple subcarriers of the second wavelength to each access site device . And each access site device also uses the subcarrier of the second wavelength to send data to the site device. In this way, backup of data transmission can be realized.

Step 703, based on the bandwidth required by each access site device and the association relationship between each access site device and the subcarrier of the second wavelength, assign each access site device a subcarrier of the second wavelength.

In this embodiment, the capacity expansion apparatus acquires the association relationship between each access point device and the subcarrier of the second wavelength. The association relationship indicates the subcarriers of the second wavelength supported by each access site device, or the association relationship indicates the subcarriers of the second wavelength supported by each access site device and the currently allocated subcarriers for each access site device Subcarriers of the second wavelength. The subcarriers of the second wavelength supported by each access site device refer to the subcarriers that each access site device can receive data coherently, and can also be considered as the subcarriers obtained by modulating data on the signal light of the fourth wavelength. The subcarriers of the second wavelength currently allocated to each access site device belong to the subcarriers of the second wavelength supported by each access site device.

The capacity expansion device allocates subcarriers of the second wavelength to each access site device using the bandwidth required by each access site device and the above-mentioned association relationship. The bandwidth of the subcarrier of the second wavelength allocated to each access site device is greater than or equal to the bandwidth required by each access site device.

Step 704, notify the office device and each access site device of the subcarriers of the second wavelength allocated for each access site device.

In this embodiment, after allocating a subcarrier of the second wavelength to each access site device, the capacity expansion apparatus sends a subcarrier adjustment notification to the site device. The office device acquires the subcarriers of the second wavelength allocated to each access site device from the subcarrier adjustment notification, and records the subcarriers of the second wavelength allocated to each access site device. Exemplarily, the subcarrier adjustment notification carries the corresponding relationship between the identifier of each access site device and the subcarrier of the second wavelength and the first identifier, and the first identifier indicates the communication subcarrier of the second transceiver component of the access site device. The carrier adjustment further instructs the second sub-office device or the standby transceiver module to record the subcarrier of the second wavelength allocated for each access site device. Here, when the office device includes the first sub-office device and the second sub-office device, the second sub-office device records the subcarrier of the second wavelength allocated to each access site device. When the site equipment includes the main transceiver module and the backup transceiver module, the backup transceiver module records the subcarriers of the second wavelength allocated to each access site device.

In addition, the office equipment adopts a multi-carrier modulation technology to modulate the sub-carrier adjustment notification onto the signal light of the first wavelength to obtain multiple sub-carriers of the first wavelength. A subcarrier adjustment notification is modulated on at least one subcarrier of the first wavelength currently used by each access site device. The office device sends multiple subcarriers of the first wavelength to the outer ring optical fiber. The first transceiver component of each access site device receives multi-subcarriers of the first wavelength from the outer ring fiber, and the first transceiver component of each access site device coherently receives its corresponding subcarriers of the first wavelength to obtain the subcarriers Adjust notifications. The network element electrical layer board of each access site device receives the subcarrier adjustment notification from the first transceiver component, and obtains the subcarrier of the second wavelength and the first identifier allocated to itself in the subcarrier adjustment notification. The network element electrical layer single board of each access site device sends a notification to the second transceiver component, so that the local oscillator light and signal light of the second transceiver component are adjusted to correspond to the target subcarrier. For any access site device, The target subcarrier is a subcarrier of the second wavelength allocated for the access site device. Then each access site device also uses the subcarrier of the first wavelength to send an adjustment completion message to the office site device. After receiving the adjustment completion message sent by each access site device, the office device sends an adjustment completion message to the capacity expansion device. Subsequent office devices and access site devices may use the reallocated subcarriers of the second wavelength for communication.

In addition, the office device may also use a multi-carrier modulation technology to modulate the sub-carrier adjustment notification onto the signal light of the second wavelength to obtain multiple sub-carriers of the second wavelength. A subcarrier adjustment notification is modulated on at least one subcarrier of the second wavelength currently used by each access site device, where "currently used" refers to a subcarrier that has not been switched to a reallocated one. The office device sends multiple subcarriers of the second wavelength to the inner ring fiber. The second transceiver component of each access site device receives multi-subcarriers of the second wavelength from the inner ring fiber, and the second transceiver component of each access site device coherently receives its corresponding subcarriers of the second wavelength to obtain the subcarriers Adjust notifications. In this way, even if the network element electrical layer board of each access site device cannot obtain the subcarrier adjustment notification from the first transceiver part, it can also obtain the subcarrier adjustment notification from the second transceiver part, so that the process of sending the subcarrier adjustment notification Higher reliability. In addition, each access site device may also send an adjustment completion message to the office device through a subcarrier of the second wavelength, where the subcarrier of the second wavelength may be a reassigned subcarrier of the second wavelength, or may be the current Subcarriers of the second wavelength to use.

Based on the above description, using the solution of this application, when expanding the capacity of the access site equipment, the service communication is adjusted to one of the two communication paths, so as to keep the service communication uninterrupted. Then re-allocate a subcarrier on another communication path for each access site device, and subsequent service communications can use the communication path of the reassigned subcarrier. It can be seen that not only can business communication continue when the access site equipment is expanded, but also by reassigning subcarriers, the bandwidth of each access site device can be used with maximum efficiency without requiring each access site device to support The entire bandwidth of the office device.

The flow shown in FIG. 7 will be described in detail below.

In the process shown in FIG. 7 , step 702 can be implemented in multiple ways, and based on the different processing methods of step 702 , the capacity expansion process shown in FIG. 8 and FIG. 9 is provided. In FIG. 8 , firstly, the subcarriers of the first wavelength are reassigned to the access site devices, and the office device and each access site device use the reassigned subcarriers of the first wavelength to perform service communication. In Figure 9, switch to use the subcarriers of the first wavelength currently assigned to each access site device for business communication, and after re-allocating the subcarriers of the second wavelength for multiple access site devices, The ingress device reassigns the subcarriers of the first wavelength to implement backup.

The flow of the capacity expansion method shown in FIG. 8 is as follows.

Step 801, detecting the capacity expansion requirement of at least one access site device among multiple access site devices, and determining the required bandwidth of each access site device.

For the processing in step 801, refer to the processing in step 701, which will not be repeated here.

Step 802, judging whether the sum of the bandwidths required by multiple access site devices is higher than the bandwidth of the site device for receiving subcarriers of the second wavelength.

In this embodiment, after obtaining the bandwidth required by each access site device, the expansion device calculates the sum of the bandwidths required by all access site devices. The capacity expansion device obtains the stored bandwidth of the sub-carriers of the second wavelength received by the site equipment, and judges the relationship between the sum of the bandwidths and the bandwidth of the sub-carriers of the second wavelength received by the site equipment.

Step 803, if the sum of the bandwidth required by multiple access site devices is not higher than the bandwidth of the sub-carriers of the second wavelength received by the site device, and determine the current communication between the site device and each access site device based on the second wavelength The subcarriers perform service communication, and allocate the subcarriers of the first wavelength to each access site device based on the bandwidth required by each access site device and the association relationship between each access site device and the subcarriers of the first wavelength; The control office device performs service communication with each access site device based on the subcarrier of the first wavelength allocated to each access site device.

In this embodiment, if the sum of the bandwidth required by multiple access site devices is not higher than the bandwidth of the sub-carrier of the second wavelength received by the site device, it means that the site device can also carry multiple access site devices to expand capacity For subsequent service communication, more subcarriers can be reassigned to the access site equipment that needs to be expanded by reassigning the subcarriers of the second wavelength. For example, the sum of the bandwidth required by multiple access site devices is 380G, and the bandwidth of the second wavelength subcarrier received by the site device is 400G, which means that the site device can also carry the expanded service communication of multiple access site devices . What needs to be explained here is that since the sub-carriers of the first wavelength received by the office device have the same bandwidth as the sub-carriers of the second wavelength, the sum of the bandwidth required by multiple access site devices is not higher than that of the office site. The device receives the bandwidth of the subcarriers of the first wavelength.

The capacity expansion device determines that the office device and each access site device currently perform service communication based on the subcarrier of the second wavelength. For example, the subcarriers of the second wavelength are used for primary communication. Normally, the office equipment and each access site equipment perform service communication based on the subcarriers of the second wavelength, or the capacity expansion device notifies the office equipment to communicate with the Each access site device currently performs service communication based on the subcarrier of the second wavelength.

The capacity expansion apparatus acquires the association relationship between each access site device and the subcarrier of the first wavelength. The association relationship indicates the subcarriers of the first wavelength supported by each access site device, or the association relationship indicates the subcarriers of the first wavelength supported by each access site device and the currently allocated subcarriers for each access site device Subcarriers of the first wavelength. The subcarriers of the first wavelength supported by each access site device refer to the subcarriers that each access site device can receive data coherently, and can also be considered as the subcarriers obtained by modulating data on the signal light of the third wavelength. The subcarriers of the first wavelength currently allocated to each access site device belong to the subcarriers of the first wavelength supported by each access site device.

When the association relationship indicates the subcarriers of the first wavelength supported by each access site device, the capacity expansion device uses the bandwidth required by each access site device, and the subcarriers of the first wavelength supported by each access site device , allocate a subcarrier of the first wavelength to each access site device. For any access site device, the sum of the bandwidths of the subcarriers of the first wavelength allocated to the access site device is not less than the bandwidth required by the access site device.

When the association relationship indicates the subcarriers of the first wavelength supported by each access site device and the subcarriers of the first wavelength currently allocated to each access site device, the capacity expansion device uses the subcarriers of the first wavelength required by each access site device Bandwidth and the subcarriers of the first wavelength currently allocated to each access site device, among the subcarriers of the first wavelength supported by each access site device, allocate the subcarriers of the first wavelength to each access site device . It should be noted here that when allocating subcarriers of the first wavelength to each access site device, the subcarriers currently allocated to each access site device are not adjusted as much as possible. For example, FIG. 10 provides a schematic diagram of allocating subcarriers of the first wavelength to each access site device. The bandwidth of the subcarriers of the first wavelength received by the site device is 400G, and the bandwidth of the subcarriers of the second wavelength is 400G. , the subcarriers of the first wavelength and the second wavelength are 16 subcarriers (subcarrier 1 to subcarrier 16), the bandwidth of each subcarrier is 25G, and there are a total of 8 access site devices (access site device 1 to interface Ingress point device 8), currently assigns two subcarriers of the first wavelength to each access point device, and assigns two subcarriers of the second wavelength to each access point device, and assigns two subcarriers of the second wavelength to each access point device. The device 8 allocates subcarrier 1 to subcarrier 16 in sequence, and each access site device uses only one subcarrier, and the other subcarrier is idle, and the idle subcarrier is represented by a dotted line. Access point device 2 and access point device 3 both need to be expanded from 25G to 100G due to service adjustment, indicating that access point device 2 and access point device 3 both use 4 subcarriers. FIG. 10 also provides a schematic diagram of re-allocating subcarriers of the first wavelength for each access site device. Subcarrier 1 is allocated to access site device 1, and subcarriers 2 to 5 are allocated to access site device 2. Access site device 3 allocates subcarriers 6 to 9, allocates subcarrier 10 to access site device 4, allocates subcarrier 11 to access site device 5, allocates subcarrier 12 to access site device 6, and assigns subcarrier 12 to access site device 6. Station device 7 allocates subcarrier 13 and subcarrier 14 (subcarrier 14 is idle), and access station equipment 8 allocates subcarrier 15 and subcarrier 16 (subcarrier 16 is idle). In this way, when re-allocating sub-carriers for each access site device, the currently allocated sub-carriers are preferentially used, and the adjustment range is relatively small. For example, in FIG. 10 , the subcarriers corresponding to the access site device 7 and the access site device 8 are not adjusted.

After re-allocating the subcarrier of the first wavelength to each access site device, the capacity expansion device sends a subcarrier adjustment notification to the site device. The office device obtains the subcarrier of the first wavelength allocated to each access site device from the subcarrier adjustment notification, and records the subcarrier of the first wavelength allocated to each access site device. Exemplarily, the subcarrier adjustment notification carries the correspondence between the identifier of each access site device and the subcarrier of the first wavelength and a second identifier, the second identifier indicates the subcarrier adjustment for the communication of the first transceiver component, and also indicates The first sub-office device records the subcarriers of the first wavelength allocated to each access site device.

The office equipment adopts the multi-carrier modulation technology to modulate the sub-carrier adjustment notification onto the signal light of the second wavelength to obtain multiple sub-carriers of the second wavelength. A subcarrier adjustment notification is modulated on at least one subcarrier of the second wavelength currently used by each access site device. The office device sends multiple subcarriers of the second wavelength to the access site device. The second transceiving component of each access site device coherently receives its corresponding subcarrier of the second wavelength from the multiple subcarriers of the second wavelength. The network element electrical layer board of the access site device obtains the subcarrier adjustment notification from the second transceiver component. Each access site device obtains the subcarrier of the first wavelength allocated to itself in the subcarrier adjustment notification. Each access site device records its corresponding subcarrier of the first wavelength. Each access site device sends an adjustment completion message to the office device through the second transceiver component. After receiving the adjustment completion message from the second sub-office device, the network element electrical layer board of the office device sends an adjustment completion message to the capacity expansion device. In addition, the office device may also use a multi-carrier modulation technology to modulate the sub-carrier adjustment notification onto the signal light of the first wavelength to obtain multiple sub-carriers of the first wavelength. A subcarrier adjustment notification is modulated on at least one subcarrier of the first wavelength currently used by each access site device. The office device sends multiple subcarriers of the first wavelength to the access site device. The first transceiving component of each access site device coherently receives its corresponding subcarrier of the first wavelength from the multiple subcarriers of the first wavelength. Each access site device sends an adjustment completion message to the office site device through the first transceiver component. The reason why the subcarriers of the first wavelength and the subcarriers of the second wavelength are used for communication here is to perform data transmission backup, and of course, only the subcarriers of the second wavelength may be used for communication.

After receiving the adjustment completion message sent by the site equipment, the capacity expansion device sends the first communication switching notification to the site equipment, and the first communication switching notification indicates that the subcarrier of the first wavelength is used for service communication, that is, indicates that the network element of the site equipment The electrical-layer single board receives the data received by the first sub-office device, and the network element electrical-layer single board of each access site device receives the data received by the first transceiver component. After the office device receives the first communication switching notification, the office device sends the first communication switching notification to each access site device, and then adjusts the electrical layer board of the network element to receive data on the subcarrier of the first wavelength, And subsequently use the reallocated subcarriers of the first wavelength to send data to the access site device. After each access site device receives the first communication switching notification, it adjusts the local oscillator light and signal light of the first transceiver unit to correspond to the target subcarrier. For any access site device, the target subcarrier is the The subcarrier of the first wavelength allocated by the inbound device. The network element electrical layer board of each access site device selects to receive data from the first transceiver component. Here, the manner in which the office device sends the first communication handover notification to each access site device is the same as the process in which the office device sends a subcarrier adjustment notification to each access site device, and will not be repeated here.

Subsequent office equipment modulates the data of each access site device onto the signal light of the first wavelength, obtains multiple subcarriers of the first wavelength, and sends multiple subcarriers of the first wavelength to each access site device. Each access site device uses the subcarrier of the first wavelength to send data to the office site device. The network element electrical layer board of each access site device selects to receive data on the subcarrier of the first wavelength, and the network element electrical layer board of the site device selects to receive data on the first wavelength subcarrier. In addition, the office device modulates the data of each access site device onto the signal light of the second wavelength to obtain multiple subcarriers of the second wavelength, and sends the multiple subcarriers of the second wavelength to each access site device. Each access site device also uses the subcarrier of the second wavelength to send data to the office site device. In this way, since the same data is transmitted using the subcarriers of the first wavelength and the subcarriers of the second wavelength, the reliability of service communication can be made higher.

It should be noted that the above is only a way of switching the subcarriers of the first wavelength for business communication, and the following way can also be used: the office device uses the subcarriers of the first wavelength before adjustment to send each access site device After sending the subcarrier adjustment notification, switch to the reassigned subcarrier of the first wavelength. After each access site device receives the subcarrier adjustment, the first transceiver unit adjusts to use the reallocated subcarrier of the first wavelength, that is, returns an adjustment completion message to the site device to use the reallocated first wavelength subcarrier . When the office device sends the first communication switching notification to the access site device, it also uses the reallocated subcarrier of the first wavelength. In addition, the following method can also be used: after each access site device receives the subcarrier adjustment notification, it switches to the electrical layer board of the network element to receive data from the first transceiver part, and does not need the capacity expansion device to issue the first communication switching notification .

Step 804, based on the bandwidth required by each access site device and the association relationship between each access site device and the subcarrier of the second wavelength, assign each access site device a subcarrier of the second wavelength.

In this embodiment, there are multiple ways to execute step 804, and two ways are provided as follows.

In a first manner, each access site device is allocated a subcarrier of the second wavelength based on the bandwidth required by each access site device and the subcarriers of the second wavelength supported by each access site device.

In this embodiment, the expansion device uses the bandwidth required by each access site device, and allocates the subcarriers of the second wavelength to each access site device among the subcarriers of the second wavelength supported by each access site device. carrier. For any access site device, the sum of the bandwidths of the subcarriers of the second wavelength allocated to the access site device is not less than the bandwidth required by the access site device.

Mode 2, based on the bandwidth required by each access site device, the subcarriers of the second wavelength supported by each access site device, and the subcarriers of the second wavelength currently allocated to each access site device, for each The access site device allocates subcarriers of the second wavelength.

In this embodiment, the expansion device uses the bandwidth required by each access site device and the subcarriers of the second wavelength currently allocated to each access site device, and the subcarriers of the second wavelength supported by each access site device Among the subcarriers, a subcarrier of the second wavelength is allocated to each access site device. It should be noted here that when allocating subcarriers of the second wavelength to each access site device, the subcarriers currently allocated to each access site device should not be adjusted as much as possible. For example, on the basis of FIG. 10, FIG. 11 provides a schematic diagram of reassigning the subcarriers of the second wavelength for each access site device, assigning subcarrier 1 to access site device 1, and allocating subcarrier 1 to access site device 2. Carrier 2 to subcarrier 5, subcarrier 6 to subcarrier 9 are allocated to access site device 3, subcarrier 10 is allocated to access site device 4, subcarrier 11 is allocated to access site device 5, and subcarrier 11 is allocated to access site device 6 Subcarrier 12 is allocated, subcarrier 13 and subcarrier 14 are allocated to access site device 7, subcarrier 15 and subcarrier 16 are allocated to access site device 8, and subcarrier 14 and subcarrier 16 continue to be idle. In this way, when re-allocating sub-carriers for each access site device, the currently allocated sub-carriers are preferentially used, and the adjustment range is relatively small.

Step 805 , notifying the office device and each access site device of the subcarriers of the second wavelength allocated for each access site device.

For the processing in step 805, refer to the processing in step 704.

Step 806, sending a capacity expansion completion message to the office device and each access site device, where the capacity expansion completion message indicates that both the subcarriers of the first wavelength and the subcarriers of the second wavelength can be used for service communication.

In this embodiment, in step 805, the capacity expansion device receives the adjustment completion message sent by the site device, the capacity expansion device sends a capacity expansion completion message to the site device, and the site device modulates the capacity expansion completion message to the signal light of the first wavelength and the signal light of the second wavelength to obtain multiple subcarriers of the first wavelength and multiple subcarriers of the second wavelength, and the office device sends multiple subcarriers of the first wavelength and multiple subcarriers of the second wavelength to each access point device Carrier, where reassigned subcarriers are used. After the office device and the network element electrical layer board of each access site device receive the expansion completion message, the office device uses the subcarriers of the first wavelength and the second wavelength to send data to the access site device. The data on the subcarriers of one wavelength and the subcarriers of the second wavelength are the same. Each access site device can choose to receive data on the subcarrier of the first wavelength, or can choose to receive data on the subcarrier of the second wavelength, that is, the network element electrical layer board of each access site device selects from the Data is received on a transceiver unit, or data is received from a second transceiver unit. Each access site device uses the subcarrier of the first wavelength to send data to the office device, and the subcarrier of the second wavelength to send data to the office device. The network element electrical layer board of the office device selects to receive the data received by the first sub-office device or the second sub-office device. In this way, since two communication paths can be used for communication, the reliability of service communication is relatively high.

Step 807, if the sum of the bandwidths required by the multiple access site devices is higher than the bandwidth of the site device for receiving the subcarriers of the second wavelength, control increasing the bandwidth of the site device for receiving the subcarriers of the second wavelength.

In this embodiment, if the sum of the bandwidth required by multiple access site devices is higher than the bandwidth of the sub-carriers of the second wavelength received by the site device, it means that the site device cannot bear the expanded services of multiple access site devices Communication, the reason is: the data of each access site device will be aggregated to the office device, which is limited by the receiving bandwidth of the office device. When the sum of bandwidth required by multiple access site devices is higher than the If the sub-carrier bandwidth of two wavelengths is lower, it means that the total capacity of the current network exceeds the receiving capability of the office equipment, and the data reception cannot be completed normally, and the data reception can only be completed by adding modules. The expansion device controls to increase the bandwidth of the sub-carriers of the second wavelength received by the site equipment, that is, controls to increase the bandwidth of the sub-carriers of the second wavelength received by the second sub-site equipment. For example, the capacity expansion device sends a capacity expansion indication message to the terminal used by the manager, the capacity expansion command message indicates to increase the bandwidth of the site device to receive the subcarrier of the second wavelength, and the manager's terminal receives the capacity expansion command message. The administrator can increase the bandwidth of the sub-carriers of the second wavelength received by the office equipment. For example, the administrator replaces the transceiver module of the office equipment to transmit and receive the subcarrier of the second wavelength, so that the transceiver module can support the expanded bandwidth of multiple access site equipment. For another example, the site device is configured with multiple transceiver modules for receiving subcarriers of the second wavelength, and the capacity expansion device sends a capacity expansion instruction message to the site device, and the capacity expansion instruction message instructs the site device to increase the bandwidth for receiving subcarriers of the second wavelength , the office device may switch the transceiver module receiving the subcarrier of the second wavelength to a transceiver module with a larger bandwidth.

Since the sub-carrier bandwidth of the first wavelength received by the office device is the same as that of the sub-carrier received by the second wavelength, the sum of bandwidth required by multiple access site devices is higher than that of the second wavelength. When the sub-carrier bandwidth of the wavelength is increased, the capacity expansion device also controls to increase the bandwidth of the sub-carrier of the first wavelength received by the site device, that is, controls to increase the bandwidth of the sub-carrier of the first sub-site device to receive the first wavelength. The expansion method in step 807 may be referred to as hardware expansion.

After hardware expansion is performed on the office equipment, the office equipment sends newly added subcarriers to the access site equipment that needs to be expanded, so as to realize the capacity expansion of the access site equipment.

Based on the process shown in FIG. 8 , the capacity expansion device can re-allocate the subcarriers of the first wavelength and the subcarriers of the second wavelength to multiple access point devices by only triggering two handovers.

The flow of the capacity expansion method shown in FIG. 9 is as follows.

Step 901, detecting the capacity expansion requirement of at least one access site device among multiple access site devices, and determining the bandwidth required by each access site device.

For the processing in step 901, refer to the processing in step 701, which will not be repeated here.

Step 902, judging whether the sum of the bandwidths required by multiple access site devices is higher than the bandwidth of the site device for receiving subcarriers of the second wavelength.

For the processing in step 902, refer to the processing in step 802, which will not be repeated here.

Step 903, if the sum of the bandwidth required by multiple access site devices is not higher than the bandwidth of the sub-carrier of the second wavelength received by the site device, control the site device and each access site device based on the current The subcarriers of the first wavelength allocated by the site equipment are used for service communication.

In this embodiment, the capacity expansion device issues a first communication switching notification to the office equipment, and the first communication switching notifies the office equipment and the network element electrical layer board of each access site equipment to receive subcarriers of the first wavelength on the data. After the office device receives the first communication switching notification, the office device modulates the first communication switching notification to the signal light of the first wavelength and the signal light of the second wavelength, and obtains the multi-subcarrier of the first wavelength and the signal light of the second wavelength. Multiple subcarriers. The office device sends multiple subcarriers of the first wavelength and multiple subcarriers of the second wavelength. Here, the network element electrical layer board of each access site device chooses to receive the data of the first transceiver unit or the data of the second transceiver unit, so each access site device will only receive the subcarriers passing the first wavelength Or the first communication switching notification on the subcarrier of the second wavelength. For each access site device, if the current network element electrical layer board of the access site device receives the data of the first transceiver component, no adjustment is required; For the data of the second transceiver component, the electrical layer board of the network element is adjusted to receive the data of the first transceiver component. Next, the office device modulates the data of each access site device onto the signal light of the first wavelength, obtains multiple subcarriers of the first wavelength, and sends the multiple subcarriers of the first wavelength to each access site device. Each access site device uses the subcarrier of the first wavelength to send data to the office site device. The network element electrical-layer board of each access site device selects to receive data on the subcarrier of the first wavelength, and the network element electrical-layer board of the site device selects to receive data received by the first sub-site device.

In addition, the office device modulates the data of each access site device onto the signal light of the second wavelength to obtain multiple subcarriers of the second wavelength, and sends the multiple subcarriers of the second wavelength to each access site device. And each access site device also uses the subcarrier of the second wavelength to send data to the site device. In this way, even if data cannot be received on the sub-carrier of the first wavelength, data can still be received on the sub-carrier of the second wavelength, so that the reliability of service communication is higher.

Step 904: Based on the bandwidth required by each access site device and the association relationship between each access site device and the subcarrier of the second wavelength, allocate a subcarrier of the second wavelength to each access site device.

For the processing in step 904, refer to the processing in step 804, which will not be repeated here.

Step 905 , notifying the office device and each access site device of the subcarriers of the second wavelength allocated for each access site device.

The processing in step 905 is the same as the processing in step 704, and will not be repeated here.

Step 906, the control office device performs service communication with each access site device based on the subcarrier of the second wavelength allocated for each access site device.

In this embodiment, in step 905, the capacity expansion device receives the adjustment completion message sent by the site device, and the capacity expansion device sends a second communication switching notification to the site device, and the second communication switching notification indicates that the site device communicates with each access The network element electrical layer board of the site device receives data on the subcarrier of the second wavelength. After the office device receives the second communication switching notification, the office device sends the second communication switching notification to each access site device (similar to the sending of the first communication switching notification in the previous section, which will not be described here), and then sends the network The primary electrical layer board is adjusted to receive the data received by the second sub-office device from the access site device. After each access site device receives the second communication switching notification, it adjusts the network element electrical layer veneer to receive the data of the second transceiver component. The subsequent site device modulates the data of each access site device onto the signal light of the second wavelength to obtain multiple subcarriers of the second wavelength, and sends the multiple subcarriers of the second wavelength to each access site device. Each access site device also uses the subcarrier of the second wavelength to send data to the office site device. The network element electrical layer board of each access site device selects to receive data on the subcarrier of the second wavelength, and the network element electrical layer board of the site device selects to receive data on the subcarrier of the second wavelength.

In addition, the office device modulates the data of each access site device onto the signal light of the first wavelength to obtain multiple subcarriers of the first wavelength, and sends the multiple subcarriers of the first wavelength to each access site device. Each access site device uses the subcarrier of the first wavelength to send data to the office site device. In this way, even if data cannot be received on the sub-carrier of the second wavelength, data can still be received from the sub-carrier of the first wavelength, so that the reliability of service communication is relatively high.

The foregoing description of step 906 is only an example, and is not limited in this embodiment of the present application.

Step 907: Based on the bandwidth required by each access site device and the association relationship between each access site device and the subcarrier of the first wavelength, re-allocate each access site device with a subcarrier of the first wavelength.

For the processing of step 907, refer to the process of allocating subcarriers of the first wavelength to each access site device in step 803.

Step 908 , notifying the office device and each access site device of the subcarriers of the first wavelength allocated for each access site device.

The processing in step 908 is similar to the processing in step 704 and will not be repeated here.

Step 909, sending a capacity expansion completion message to the office device and each access site device, where the capacity expansion completion message indicates that both the subcarriers of the first wavelength and the subcarriers of the second wavelength can be used for service communication.

For the processing in step 909, refer to the processing in step 806.

Step 910, if the sum of the bandwidth required by multiple access site devices is higher than the bandwidth of the site device receiving the subcarrier of the second wavelength, control increasing the bandwidth of the site device receiving the subcarrier of the second wavelength.

For the processing of step 910, refer to the processing of step 807, which will not be repeated here.

Based on the process shown in FIG. 9 , the capacity expansion device can quickly switch to using the subcarrier of the first wavelength for service communication.

After the above-mentioned processes in Figure 7, Figure 8 and Figure 9 are completed, the capacity expansion device sends a capacity expansion completion message to the terminal used by the management personnel, and the management personnel perform service upgrades in the expanded access site equipment to complete the access site equipment Business upgrade. Alternatively, the capacity expansion device sends a service upgrade instruction to the expanded access point device through the site device, and the expanded access point device performs service upgrade after receiving the service upgrade instruction.

Through the embodiment of this application, when the access site equipment is expanded, without increasing the complexity of the system, lossless expansion can be achieved, and the device bandwidth of the access site equipment can be maximized (for example, the access site equipment needs to be expanded To 100G, the device bandwidth of the access site equipment only needs to support 100G, and does not need to support the entire bandwidth of the office site equipment), saving the cost of the access site equipment.

The capacity expansion device provided by the embodiment of the present application is introduced below. FIG. 12 is a structural diagram of a capacity expansion device provided by an embodiment of the present application. The device can be implemented as a part or all of the device through software, hardware or a combination of the two. The device provided in the embodiment of the present application can implement the processes described in Figure 7, Figure 8 and Figure 9 in the embodiment of the present application. The device is applied to a coherent optical system, and the system includes office equipment and multiple access site equipment. The device and multiple access site devices are connected through an optical fiber ring, and the device includes: a detection module 1210, a control module 1220 and a distribution module 1230, wherein:

The detection module 1210 is configured to detect the capacity expansion requirement of at least one access site device among the plurality of access site devices, and determine the bandwidth required by each access site device, which may be specifically used to implement the detection function in step 701 and Execute the implicit steps included in step 701;

The control module 1220 is configured to control the site device to perform service communication with each access site device based on the subcarrier of the first wavelength, and may specifically be used to realize the control function of step 702 and perform the implicit steps included in step 702;

An allocation module 1230, configured to allocate subcarriers of the second wavelength to each access site device based on the bandwidth required by each access site device and the association relationship between each access site device and the subcarriers of the second wavelength The carrier wave can specifically be used to implement the determination function of step 703 and perform the implicit steps included in step 703;

The control module 1220 is further configured to notify the site device and each access site device of the subcarriers of the second wavelength allocated to each access site device, which may specifically be used to implement the control function of step 704 And the implicit steps included in step 704 are performed.

In a possible implementation manner, the detection module 1210 is further configured to determine the The office device and each access site device currently perform service communication based on the subcarrier of the second wavelength;

The control module 1220 is configured to:

Allocating the subcarriers of the first wavelength to each access site device based on the bandwidth required by each access site device and the association relationship between each access site device and the subcarriers of the first wavelength;

Controlling the office device to perform service communication with each access site device based on the subcarrier of the first wavelength allocated for each access site device.

In a possible implementation manner, the control module 1220 is configured to control the communication between the office device and each access site device based on the subcarrier of the first wavelength currently assigned to each access site device. business communications;

The control module 1220 is further configured to control the communication between the office device and each access site device after notifying the office device and each access site device of the subcarrier of the second wavelength allocated to each access site device. The access site device performs service communication based on the subcarriers of the second wavelength allocated to each access site device;

The allocating module 1230 is further configured to re-assign each access site device based on the bandwidth required by each access site device and the association relationship between each access site device and the subcarrier of the first wavelength. Subcarriers of the first wavelength;

The control module 1220 is further configured to notify the office device and each access site device of the subcarriers of the first wavelength allocated for each access site device.

In a possible implementation manner, the control module 1220 is further configured to send a capacity expansion completion message to the office device and each access point device, where the capacity expansion completion message indicates that the first wavelength Both the subcarriers and the subcarriers of the second wavelength can be used for service communication.

In a possible implementation manner, the allocation module 1230 is configured to:

Allocating subcarriers of the second wavelength to each access site device based on the bandwidth required by each access site device and the subcarriers of the second wavelength supported by each access site device; or,

Based on the bandwidth required by each access site device, the subcarriers of the second wavelength supported by each access site device, and the subcarriers of the second wavelength currently allocated to each access site device, for each An access site device allocates the subcarrier of the second wavelength.

In a possible implementation manner, the detection module 1210 is further configured to:

Before controlling the site device to perform business communication with each access site device based on the subcarrier of the first wavelength, determine that the sum of bandwidth required by the multiple access site devices is not higher than that of the site device receiving the bandwidth of the subcarriers of the second wavelength.

In a possible implementation manner, the detection module 1210 is further configured to determine that the sum of the bandwidths required by the multiple access site devices is higher than that of the site device receiving the subcarrier of the second wavelength bandwidth;

The control module 1220 is further configured to control increasing the bandwidth of the sub-carrier of the second wavelength received by the site device.

In a possible implementation manner, the detection module 1210 is configured to:

When the capacity expansion request sent by the at least one access site device is received, it is determined that the capacity expansion requirement of the at least one access site device is detected, and the capacity expansion request indicates that the bandwidth required by the at least one access site device is increased or the required bandwidth; or, when receiving a service upgrade notification, it is determined that the expansion requirement of the at least one access site device is detected, and the service upgrade notification indicates the required bandwidth of the at least one access site device Increment or required bandwidth.

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

In some embodiments, a computer program product comprising computer instructions stored in a computer readable storage medium is provided. The processor of the expanded device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the expanded device executes the processes shown in FIG. 7 , FIG. 8 and FIG. 9 .

Those of ordinary skill in the art can realize that the various method steps and units described in the embodiments disclosed in this application can be realized by electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the relationship between hardware and software Interchangeability. In the above description, the steps and components of each embodiment have been generally described according to their functions. Whether these functions are executed by hardware or software depends on the specific application and design constraints of the technical solution. Those of ordinary skill in the art may implement the described functionality using different methods for each particular application, but such implementation should not be considered as exceeding the scope of the present application.

In the several embodiments provided in this application, it should be understood that the disclosed system architecture, device and method can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of the modules is only a logical function division. In actual implementation, there may be other division methods. For example, multiple modules or components can be combined or can be Integrate into another system, or some features may be ignored, or not implemented. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be indirect coupling or communication connection through some interfaces, devices or modules, and may also be electrical, mechanical or other forms of connection.

The modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical modules, that is, they may be located in one place, or may be distributed to multiple network modules. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present application.

In addition, each module in each embodiment of the present application may be integrated into one processing module, each module may exist separately physically, or two or more modules may be integrated into one module. The above-mentioned integrated modules can be implemented in the form of hardware or in the form of software modules.

If the integrated module is realized in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of software products, and the computer software products are stored in a storage medium In, several instructions are included to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods in the various embodiments of the present application. The aforementioned storage medium includes: various media capable of storing program codes such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

In this application, the terms "first" and "second" are used to distinguish the same or similar items with basically the same function and function. It should be understood that there is no logic or sequence between "first" and "second" Dependencies on the above, and there are no restrictions on the number and execution order. It should also be understood that although the following description uses the terms first, second, etc. to describe various elements, these elements should not be limited by the terms. These terms are only used to distinguish one element from another. For example, a first wavelength could be termed a second wavelength, and, similarly, a second wavelength could be termed a first wavelength, without departing from the scope of the various examples. Both the first wavelength and the second wavelength may be wavelengths, and in some cases, separate and distinct wavelengths.

The meaning of the term "at least one" in this application refers to one or more, and the meaning of the term "multiple" in this application refers to two or more.

The above description is only an exemplary implementation of the application, but the scope of protection of the application is not limited thereto. Any person familiar with the technical field can easily think of various equivalents within the technical scope disclosed in the application. The modifications or replacements should be covered by the scope of protection of this application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims (17)

1. A method for capacity expansion, characterized in that the method is applied to a coherent optical system, the coherent optical system includes an office device and multiple access site devices, and the office device and the multiple access site devices Connected via a fiber optic ring, the method includes:

   Detecting the expansion requirement of at least one access site device among the plurality of access site devices, and determining the bandwidth required by each access site device;

   controlling the site device to perform service communication with each access site device based on the subcarrier of the first wavelength;

   Allocating the subcarriers of the second wavelength to each access site device based on the bandwidth required by each access site device and the association relationship between each access site device and the subcarriers of the second wavelength;

   Informing the office device and each access site device of the subcarriers of the second wavelength allocated for each access site device.
2. The method according to claim 1, wherein before the controlling the office device to perform service communication with each access site device based on the subcarrier of the first wavelength, further comprising: determining that the office The point device currently performs service communication with each access point device based on the subcarrier of the second wavelength;

   The controlling the site device to perform service communication with each access site device based on the subcarrier of the first wavelength includes:

   Allocating the subcarriers of the first wavelength to each access site device based on the bandwidth required by each access site device and the association relationship between each access site device and the subcarriers of the first wavelength;

   Controlling the office device to perform service communication with each access site device based on the subcarrier of the first wavelength allocated for each access site device.
3. The method according to claim 1, wherein the controlling the site device to perform service communication with each access site device based on the subcarrier of the first wavelength comprises:

   controlling the site device to perform service communication with each access site device based on the subcarrier of the first wavelength currently assigned to each access site device;

   After the notifying the site device and each access site device of the subcarriers of the second wavelength allocated to each access site device, the method further includes:

   controlling the site device to perform service communication with each access site device based on the subcarrier of the second wavelength allocated for each access site device;

   Based on the bandwidth required by each access site device and the association relationship between each access site device and the subcarrier of the first wavelength, re-allocate the subcarrier of the first wavelength to each access site device;

   Informing the office device and each access site device of the subcarriers of the first wavelength allocated for each access site device.
4. The method according to claim 2 or 3, characterized in that the method further comprises:

   Sending a capacity expansion completion message to the office device and each of the access site devices, where the capacity expansion completion message indicates that both the subcarriers of the first wavelength and the subcarriers of the second wavelength can be used for service communication.
5. The method according to any one of claims 1 to 4, wherein the bandwidth required by each access site device and the association relationship between each access site device and the subcarrier of the second wavelength is Allocating subcarriers of the second wavelength to each access site device includes:

   Allocating subcarriers of the second wavelength to each access site device based on the bandwidth required by each access site device and the subcarriers of the second wavelength supported by each access site device; or,

   Based on the bandwidth required by each access site device, the subcarriers of the second wavelength supported by each access site device, and the subcarriers of the second wavelength currently allocated to each access site device, for each An access site device allocates the subcarrier of the second wavelength.
6. The method according to any one of claims 1 to 5, wherein before controlling the office device to communicate with each access site device based on the subcarrier of the first wavelength, further includes:

   It is determined that the sum of the bandwidths required by the multiple access site devices is not higher than the bandwidth of the site device receiving the subcarriers of the second wavelength.
7. The method according to claim 6, further comprising:

   determining that the sum of the bandwidths required by the multiple access site devices is higher than the bandwidth of the site device receiving subcarriers of the second wavelength;

   controlling to increase the bandwidth of the sub-carrier of the second wavelength received by the site device.
8. The method according to any one of claims 1 to 7, wherein the detecting the capacity expansion requirement of at least one access site device among the plurality of access site devices includes:

   When the capacity expansion request sent by the at least one access site device is received, it is determined that the capacity expansion requirement of the at least one access site device is detected, and the capacity expansion request indicates that the bandwidth required by the at least one access site device is increased amount or required bandwidth; or,

   When the service upgrade notification is received, it is determined that the capacity expansion requirement of the at least one access site device is detected, and the service upgrade notification indicates the required bandwidth increase or the required bandwidth of the at least one access site device.
9. A device for capacity expansion, characterized in that the device is applied to a coherent optical system, and the system includes an office device and a plurality of access site devices, and the office device and the plurality of access site devices are connected through an optical fiber ring connection, the device includes:

   A detection module, configured to detect the capacity expansion requirement of at least one access site device among the plurality of access site devices, and determine the bandwidth required by each access site device;

   A control module, configured to control the office device to perform service communication with each access site device based on the subcarrier of the first wavelength;

   An allocation module, configured to allocate subcarriers of the second wavelength to each access site device based on the bandwidth required by each access site device and the association relationship between each access site device and the subcarriers of the second wavelength ;

   The control module is further configured to notify the site device and each access site device of the subcarriers of the second wavelength allocated for each access site device.
10. The device according to claim 9, wherein the detection module is further configured to control the site device to perform service communication with each access site device based on the subcarrier of the first wavelength , determining that the site device and each access site device are currently performing service communication based on the subcarrier of the second wavelength;

    The control module is used for:

    Allocating the subcarriers of the first wavelength to each access site device based on the bandwidth required by each access site device and the association relationship between each access site device and the subcarriers of the first wavelength;

    Controlling the site device to perform service communication with each access site device based on the subcarrier of the first wavelength allocated for each access site device.
11. The apparatus according to claim 9, wherein the control module is configured to control the communication between the office device and each access site device based on the first wavelength currently assigned to each access site device Subcarriers for business communication;

    The control module is further configured to control the communication between the office device and each access site device after notifying the office device and each access site device of the subcarrier of the second wavelength allocated to each access site device. The ingress device performs service communication based on the subcarrier of the second wavelength allocated to each access device;

    The allocation module is further configured to re-allocate the subcarriers of the first wavelength;

    The control module is further configured to notify the site device and each access site device of the subcarriers of the first wavelength allocated for each access site device.
12. The device according to claim 10 or 11, wherein the control module is further configured to send a capacity expansion completion message to the office device and each access point device, and the capacity expansion completion message indicates that the Both the subcarriers of the first wavelength and the subcarriers of the second wavelength can be used for service communication.
13. The device according to any one of claims 9 to 12, wherein the distribution module is used for:

    Allocating subcarriers of the second wavelength to each access site device based on the bandwidth required by each access site device and the subcarriers of the second wavelength supported by each access site device; or,

    Based on the bandwidth required by each access site device, the subcarriers of the second wavelength supported by each access site device, and the subcarriers of the second wavelength currently allocated to each access site device, for each An access site device allocates the subcarrier of the second wavelength.
14. The device according to any one of claims 9 to 13, wherein the detection module is also used for:

    Before controlling the site device to perform business communication with each access site device based on the subcarrier of the first wavelength, determine that the sum of bandwidth required by the multiple access site devices is not higher than that of the site device receiving the bandwidth of the subcarriers of the second wavelength.
15. The device according to any one of claims 9 to 14, wherein the detection module is used for:

    When the capacity expansion request sent by the at least one access site device is received, it is determined that the capacity expansion requirement of the at least one access site device is detected, and the capacity expansion request indicates that the bandwidth required by the at least one access site device is increased amount or required bandwidth; or,

    When the service upgrade notification is received, it is determined that the capacity expansion requirement of the at least one access site device is detected, and the service upgrade notification indicates the required bandwidth increase or the required bandwidth of the at least one access site device.
16. An expanded device, characterized in that the device includes a processor and a memory, wherein:

    computer instructions are stored in the memory;

    The processor executes the computer instructions to cause the device to perform the method of any one of claims 1 to 8.
17. A computer-readable storage medium, characterized in that at least one computer instruction is stored in the storage medium, and the computer instruction is read by a processor to enable the expanded device to perform any one of claims 1 to 8. method described in the item.

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