Optical networking system, optical communication method and device, storage medium and program product

Abstract

The invention discloses an optical networking system, an optical communication method and device, a storage medium and a program product, and belongs to the technical field of communication. In order to realize mixed insertion of optical modules, improve networking flexibility and reduce equipment management and maintenance difficulty, a plurality of access side optical modules are normalized, and an intermediate device generates an optical signal of an uplink wavelength matched with a downlink wavelength to ensure communication reliability of the uplink optical signal. Or hybrid insertion is realized in a mode of injecting a to-be-modulated optical signal with a certain uplink wavelength into the access side optical module. Or, each access side optical module has a function of generating optical signals with a plurality of uplink wavelengths, and mixed insertion can be realized by generating the optical signals with the uplink wavelengths matched with the received downlink wavelengths by the access side optical modules. Or, a plurality of access side optical modules are plugged in a mixed manner, and the intermediate equipment ensures the communication reliability of the uplink optical signals through optical crossing.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an optical networking system, an optical communication method, an apparatus, a storage medium, and a program product. Background Art

[0002] Currently, optical communications are widely used in various scenarios. For example, in fiber-to-the-home (FTTH) scenarios, optical fibers are pulled into rooms on each floor of a campus, transmitting uplink and downlink information between the optical access devices in the rooms and the central switch within the campus.

[0003] Optical access devices are typically connected to a central switch via a combiner / demultiplexer. As an intermediary device, the combiner / demultiplexer enables optical communication between a central switch and multiple optical access devices. Each optical access device is equipped with an optical module, which is connected to the same combiner / demultiplexer via optical fiber. The combiner / demultiplexer is then connected to the central switch, enabling optical communication between the multiple optical access devices and the central switch.

[0004] In the related art, a combiner / splitter has multiple ports, and the multiple ports correspond one-to-one to multiple pairs of wavelengths. Each pair of wavelengths includes an upstream wavelength and a downstream wavelength. The multiple pairs of wavelengths also correspond one-to-one to multiple optical modules. Among them, the optical fiber connected to the optical module needs to be inserted into the corresponding port according to the corresponding wavelength, that is, the multiple optical modules need to be aligned with the multiple ports and cannot be mixed. If mixed, for example, the upstream wavelength 1 corresponds to port 1 and optical module 1, and the upstream wavelength 2 corresponds to port 2 and optical module 2, if the optical fiber connected to optical module 1 is inserted into port 2, and the optical fiber connected to optical module 2 is inserted into port 1, it will cause port 1 and port 2 to receive optical signals with mismatched upstream wavelengths, then the combiner / splitter will not be able to process these mismatched optical signals, which will cause these optical signals to be unable to be transmitted to the central switch, thereby affecting optical communication.

[0005] It can be seen that multiple optical modules in the related art cannot be mixed, resulting in poor networking flexibility of optical communications, greater difficulty in equipment management and maintenance, and optical communications will be affected if the optical module is inserted into the wrong port. Summary of the Invention

[0006] This application provides an optical networking system, optical communication method, device, storage medium, and program product that can implement mixed insertion of access-side optical modules, improve the flexibility of optical networking, and reduce the difficulty of equipment management and maintenance. The technical solution is as follows:

[0007] In a first aspect, an optical networking system is provided. The optical networking system includes a central optical module, an intermediate device, and multiple access side optical modules. The central optical module is connected to the intermediate device via an optical fiber. The intermediate device includes multiple ports. Each of the multiple access side optical modules is connected to any one of the multiple ports via an optical fiber. Different access side optical modules are connected to different ports. Each port corresponds to a downstream wavelength. Different ports correspond to different downstream wavelengths. Each downstream wavelength is also matched with an upstream wavelength. Different downstream wavelengths match different upstream wavelengths.

[0008] The intermediate device is used to transmit an optical signal of a downlink wavelength corresponding to each port to the access-side optical module connected to the port through each port of the multiple ports;

[0009] Each of the multiple access side optical modules is used to generate an optical signal of a specified wavelength and transmit the optical signal of the specified wavelength to the port to which the access side optical module is connected, and the optical signals generated by the multiple access side optical modules have the same specified wavelength;

[0010] The intermediate device is used to generate an optical signal of an upstream wavelength matching the downstream wavelength corresponding to the port based on the optical signal of the specified wavelength received by each port of the multiple ports, and transmit the optical signal of the upstream wavelength to the central optical module.

[0011] That is, multiple access-side optical modules all transmit optical signals of the same designated wavelength to the intermediate device. Based on the optical signals received at each port, the intermediate device then generates an optical signal at the upstream wavelength corresponding to that port and transmits the generated upstream wavelength optical signal to the central optical module. This allows the intermediate device to match the upstream and downstream wavelengths even when multiple access-side optical modules are mixed, ensuring the reliability of optical communication. This intermixing of optical modules improves networking flexibility and reduces equipment management and maintenance.

[0012] The intermediate device includes at least one first laser configured to generate an optical signal of an upstream wavelength; the intermediate device includes an external power supply configured to supply power to any one of the at least one first lasers; alternatively, an optical fiber cable is connected between the access-side optical module and the port, and the access-side optical module is further configured to supply power to any one of the first lasers via the optical fiber cable; alternatively, an electrical cable is connected between the access-side optical module and the port, and the access-side optical module is further configured to supply power to any one of the first lasers via the electrical fiber cable. In other words, there are various ways to supply power to the first lasers within the intermediate device.

[0013] Each of the multiple ports is connected to a first laser, and each of the multiple access-side optical modules is connected to the port via an optoelectronic composite cable. Each access-side optical module is used to power the first laser connected to the access-side optical module via the optoelectronic composite cable to which it is connected. In this way, the access-side optical module provides power to the first laser on a one-to-one basis. A power failure or failure of one access-side optical module only affects the first laser on that route and has no effect on the optical communications of other access devices. The inability to conduct optical communications is due to a problem with the access-side optical module itself that is experiencing a power failure or failure, rather than due to a failure of optical communications during the transmission of optical signals by an intermediate device. Therefore, the one-to-one power supply method itself does not affect optical communications.

[0014] Optionally, the intermediate device further includes a first combiner, and the central optical module further includes a first demultiplexer; the first combiner is configured to combine multiple upstream wavelength optical signals generated by the intermediate device into a first upstream optical signal, and transmit the first upstream optical signal to the central optical module; the first demultiplexer is configured to receive a second upstream optical signal and decompose the second upstream optical signal into multiple upstream wavelength optical signals, where the second upstream optical signal is the optical signal of the first upstream optical signal after being transmitted via the optical fiber between the intermediate device and the central optical module. That is, multiple upstream optical signals are combined and transmitted.

[0015] Optionally, the central optical module is configured to transmit a first downstream optical signal to the intermediate device. The first downstream optical signal has multiple downstream wavelengths, including a downstream wavelength corresponding to at least one port. The intermediate device is further configured to receive a second downstream optical signal and decompose the second downstream optical signal into optical signals of multiple downstream wavelengths. The second downstream optical signal is the result of transmission of the first downstream optical signal via the optical fiber between the central optical module and the intermediate device. In other words, multiple downstream optical signals are also combined for transmission.

[0016] Among them, the central optical module includes a second combiner, and the intermediate device includes a second splitter; the second combiner is used to combine optical signals of multiple downstream wavelengths into a first downstream optical signal and transmit the first downstream optical signal to the intermediate device; the second splitter is used to decompose the second downstream optical signal into optical signals of multiple downstream wavelengths.

[0017] The access side optical module is inserted into the access device, or the access side optical module is integrated into the access device, and the access device is used to access the optical networking system through the access side optical module;

[0018] The central optical module is inserted into the routing switching device, or the central optical module is integrated into the routing switching device, and the routing switching device is used to communicate with the access device through the central optical module.

[0019] In a second aspect, an optical communication method is provided, which is applied to a first optical module among multiple access side optical modules included in an optical networking system, the optical networking system also including an intermediate device, the intermediate device including multiple ports, each access side optical module in the multiple access side optical modules is connected to any one of the multiple ports via an optical fiber, different access side optical modules are connected to different ports, wherein the first optical module is connected to the first port among the multiple ports; each port corresponds to a downlink wavelength, different ports correspond to different downlink wavelengths, each downlink wavelength is further matched with an uplink wavelength, different downlink wavelengths match different uplink wavelengths, and the multiple access side optical modules are configured to generate optical signals of the same specified wavelength; the method includes:

[0020] generating an optical signal of the specified wavelength;

[0021] The optical signal of the specified wavelength is transmitted to the first port, and the optical signal of the specified wavelength is used by the intermediate device to generate an optical signal of a first upstream wavelength, which is an upstream wavelength matching the downstream wavelength corresponding to the first port.

[0022] The intermediate device includes a first laser, which is used to generate an optical signal of a first upstream wavelength; optionally, the first optical module is connected to the first port via an optoelectronic composite cable, and the first port is connected to the first laser via an optical fiber, and the optoelectronic composite cable is used to transmit the optical signal of the specified wavelength, and the first optical module is also used to supply power to the first laser via the optoelectronic composite cable.

[0023] The first optical module is inserted into the access device, or the first optical module is integrated into the access device, and the access device is used to access the optical networking system through the first optical module.

[0024] In a third aspect, an optical communication method is provided, which is applied to an intermediate device in an optical networking system, the optical networking system further comprising a central optical module and a plurality of access side optical modules, the central optical module being connected to the intermediate device via an optical fiber, the intermediate device comprising a plurality of ports, each of the plurality of access side optical modules being connected to any one of the plurality of ports via an optical fiber, different access side optical modules being connected to different ports, each port corresponding to a downstream wavelength, different ports corresponding to different downstream wavelengths, each downstream wavelength also being matched with an upstream wavelength, and different downstream wavelengths matching different upstream wavelengths; the method comprising:

[0025] receiving, through each of the multiple ports, an optical signal of a specified wavelength generated and transmitted by an access-side optical module connected to the port, wherein the optical signals generated by the multiple access-side optical modules have the same specified wavelength;

[0026] generating an optical signal of an upstream wavelength matching a downstream wavelength corresponding to the port based on an optical signal of a specified wavelength received by each of the multiple ports;

[0027] Transmits optical signals of the upstream wavelength to the central optical module.

[0028] Wherein, the intermediate device includes at least one first laser, and the at least one first laser is used to generate an optical signal of an upstream wavelength;

[0029] The intermediate device has an external power supply, which is used to supply power to any one of the at least one first laser; alternatively, an optoelectronic composite cable is connected between the access side optical module and the port, and the access side optical module is also used to supply power to any one of the first lasers through the optoelectronic composite cable; alternatively, a cable is connected between the access side optical module and the port, and the access side optical module is also used to supply power to any one of the first lasers through the cable.

[0030] Optionally, each of the multiple ports is connected to a first laser, each of the multiple access side optical modules is connected to the port via an optoelectronic composite cable, and each access side optical module is used to power the first laser connected to the access side optical module through the optoelectronic composite cable connected to the access side optical module.

[0031] In a fourth aspect, a communication device is provided, wherein the communication device has the function of implementing the optical communication method described in the second or third aspect. The communication device includes one or more modules, wherein the one or more modules are used to implement the optical communication method described in the second or third aspect.

[0032] In a fifth aspect, an optical networking system is provided, the optical networking system including a central optical module, an intermediate device, and multiple access side optical modules, the central optical module and the intermediate device being connected via an optical fiber, the intermediate device including multiple ports, each of the multiple access side optical modules being connected to any one of the multiple ports via an optical fiber, different access side optical modules being connected to different ports, each port corresponding to a pair of wavelengths, each pair of wavelengths including an upstream wavelength and a downstream wavelength, different ports corresponding to different upstream wavelengths and corresponding to different downstream wavelengths;

[0033] The intermediate device is used to transmit the target optical signal of the downstream wavelength corresponding to the port and the optical signal to be modulated of the upstream wavelength corresponding to the port to the access side optical module connected to the port through each port of the multiple ports;

[0034] The first optical module among the multiple access-side optical modules is configured to receive a target optical signal of a first downstream wavelength and an optical signal to be modulated of a first upstream wavelength, modulate the optical signal to be modulated of the first upstream wavelength to obtain a target optical signal of a first upstream wavelength, and transmit the target optical signal of the first upstream wavelength to a first port connected to the first optical module, the first optical module being any one of the multiple access-side optical modules, and the first downstream wavelength and the first upstream wavelength being a pair of wavelengths corresponding to the first port;

[0035] The intermediate device is further configured to transmit a target optical signal of the first upstream wavelength to the central optical module.

[0036] That is, a modulated optical signal of a certain upstream wavelength is injected into the access side optical module. Even if multiple access side optical modules are mixed, each access side optical module can transmit the target optical signal of the upstream wavelength corresponding to the port to which it is connected, so that the upstream and downstream wavelengths are matched, and both upstream and downstream information can be successfully transmitted, ensuring the reliability of optical communication, while also reducing the flexibility of optical networking and the difficulty of equipment maintenance and management.

[0037] Optionally, the optical networking system also includes a light source pool, which is connected to the intermediate device through an optical fiber; the light source pool is used to generate multiple upstream wavelengths of optical signals to be modulated, and transmit the multiple upstream wavelengths of optical signals to be modulated to the intermediate device, and the multiple upstream wavelengths include an upstream wavelength corresponding to at least one port.

[0038] Optionally, the light source pool is used to merge the multiple upstream wavelengths of the optical signals to be modulated into a first optical signal to be modulated, and transmit the first optical signal to be modulated to the intermediate device; the intermediate device is also used to receive the second optical signal to be modulated, and decompose the second optical signal to be modulated into the multiple upstream wavelengths of the optical signals to be modulated, and the second optical signal to be modulated is the optical signal after the first optical signal to be modulated is transmitted through the optical fiber between the light source pool and the intermediate device.

[0039] Optionally, the light source pool includes a first combiner, and the intermediate device also includes a first splitter, and the first combiner is connected to the first splitter through an optical fiber; the first combiner is used to combine the multiple upstream wavelengths of the optical signals to be modulated into a first optical signal to be modulated, and transmit the first optical signal to be modulated to the second splitter; the first splitter is used to receive the second optical signal to be modulated, and decompose the second optical signal to be modulated into the multiple upstream wavelengths of the optical signals to be modulated.

[0040] Optionally, the intermediate device also includes a plurality of second combiners connected to the plurality of ports in a one-to-one correspondence via optical fibers, and the first optical module includes a second splitter and a first modulator; a reference splitter among the plurality of second combiners is used to combine a target optical signal of the first downstream wavelength and an optical signal to be modulated of the first upstream wavelength into a first downstream optical signal, and transmit the first downstream optical signal to the second splitter through the first port, and the reference splitter is a second combiner connected to the first port; the second splitter is used to receive the second downstream optical signal, decompose the second downstream optical signal into a target optical signal of the first downstream wavelength and an optical signal to be modulated of the first upstream wavelength, and transmit the optical signal of the first upstream wavelength to the first modulator, and the second downstream optical signal is an optical signal after the first downstream optical signal is transmitted through the optical fiber between the first port and the first optical module; the first modulator is used to modulate the optical signal to be modulated of the first upstream wavelength to obtain a target optical signal of the first upstream wavelength, and transmit the target optical signal of the first upstream wavelength to the first port.

[0041] The first port is connected to the second wave splitter and the first modulator respectively through optical fibers, and the first modulator is also connected to the second wave splitter through optical fibers.

[0042] Alternatively, the optical networking system also includes a circulator, the circulator includes a second port, a third port and a fourth port, the second port is connected to the first port via an optical fiber, the third port is connected to the second splitter via an optical fiber, the fourth port is connected to the first port via an optical fiber, the first modulator includes an input end and an output end, the input end of the first modulator is connected to the second splitter via an optical fiber, and the output end of the first modulator is connected to the third port via an optical fiber.

[0043] Optionally, the intermediate device further includes a third splitter connected to the plurality of second combiners, and the central optical module further includes a third combiner;

[0044] The third combiner is configured to combine the target optical signals of the multiple downstream wavelengths into a third downstream optical signal, and transmit the third downstream optical signal to the intermediate device. The third downstream optical signal has the multiple downstream wavelengths, and the multiple downstream wavelengths include a downstream wavelength corresponding to at least one port. The third demultiplexer is configured to receive the fourth downstream optical signal, decompose the fourth downstream optical signal into the target optical signals of the multiple downstream wavelengths, and transmit the target optical signal of the downstream wavelength corresponding to the port connected to each second combiner to each second combiner in the multiple second combiners. The fourth downstream optical signal is an optical signal obtained by transmitting the third downstream optical signal via the optical fiber between the central optical module and the intermediate device.

[0045] Optionally, the intermediate device further includes a fourth combiner, which is connected to the multiple ports via optical fibers, and the central optical module further includes a fourth splitter. The fourth combiner is used to combine the target optical signals of the multiple upstream wavelengths into a first upstream optical signal, and transmit the first upstream optical signal to the central optical module. The multiple upstream wavelengths include an upstream wavelength corresponding to at least one port. The fourth splitter is used to receive a second upstream optical signal and decompose the second upstream optical signal into the target optical signals of the multiple upstream wavelengths. The second upstream optical signal is an optical signal obtained by transmitting the first upstream optical signal via the optical fiber between the intermediate device and the central optical module. That is, the upstream optical signals are combined and transmitted.

[0046] Among them, the access side optical module is inserted into the access device, or the access side optical module is integrated in the access device, and the access device is used to access the optical networking system through the access side optical module; the central optical module is inserted into the routing switching device, or the central optical module is integrated in the routing switching device, and the routing switching device is used to communicate with the access device through the central optical module.

[0047] In a sixth aspect, an optical communication method is provided, which is applied to a first optical module among multiple access side optical modules included in an optical networking system, the optical networking system also including an intermediate device, the intermediate device including multiple ports, each access side optical module in the multiple access side optical modules is connected to any one of the multiple ports via an optical fiber, wherein the first optical module is connected to a first port among the multiple ports, each port corresponds to a pair of wavelengths, each pair of wavelengths includes an upstream wavelength and a downstream wavelength, and different ports correspond to different upstream wavelengths and different downstream wavelengths; the method includes:

[0048] Acquire a target optical signal of a first downstream wavelength and an optical signal to be modulated of a first upstream wavelength transmitted by the first port, where the first downstream wavelength and the first upstream wavelength are a pair of wavelengths corresponding to the first port;

[0049] Modulating the optical signal to be modulated at the first upstream wavelength to obtain a target optical signal at the first upstream wavelength;

[0050] A target optical signal of a first upstream wavelength is transmitted to the first port.

[0051] In a seventh aspect, an optical communication method is provided, which is applied to an intermediate device in an optical networking system, wherein the intermediate device includes multiple ports, and the optical networking system further includes a central optical module and multiple access side optical modules, the central optical module is connected to the intermediate device via an optical fiber, and each of the multiple access side optical modules is connected to any one of the multiple ports via an optical fiber, different access side optical modules are connected to different ports, each port corresponds to a pair of wavelengths, the pair of wavelengths including an upstream wavelength and a downstream wavelength, and different ports correspond to different upstream wavelengths and different downstream wavelengths; the method includes:

[0052] Acquire a target optical signal of a first downstream wavelength, and acquire an optical signal to be modulated of a first upstream wavelength, where the first downstream wavelength and the first upstream wavelength are a pair of wavelengths corresponding to a first port, and the first port is any one of the multiple ports;

[0053] transmitting a target optical signal of a first downstream wavelength and an optical signal to be modulated of a first upstream wavelength to a first optical module through a first port, wherein the optical signal to be modulated of the first upstream wavelength is used by the first optical module to obtain a target optical signal of the first upstream wavelength through modulation, and the first optical module is an access-side optical module connected to the first port among the multiple access-side optical modules;

[0054] receiving, through the first port, a target optical signal of a first upstream wavelength transmitted by the first optical module;

[0055] Transmit a target optical signal of the first upstream wavelength to the central optical module.

[0056] Optionally, the optical networking system further includes a light source pool, which is connected to the intermediate device via an optical fiber, and is used to generate optical signals to be modulated at multiple upstream wavelengths, wherein the multiple upstream wavelengths include the first upstream wavelength;

[0057] Acquiring an optical signal to be modulated at a first upstream wavelength, including:

[0058] An optical signal to be modulated at a first upload wavelength transmitted by the light source pool is obtained.

[0059] In an eighth aspect, a communication device is provided, wherein the communication device has the function of implementing the optical communication method described in the sixth or seventh aspect. The communication device includes one or more modules, wherein the one or more modules are used to implement the optical communication method described in the sixth or seventh aspect.

[0060] In a ninth aspect, an optical networking system is provided, the optical networking system comprising a central optical module, an intermediate device, and a plurality of access side optical modules, the central optical module being connected to the intermediate device via an optical fiber, the intermediate device comprising a plurality of ports, each of the plurality of access side optical modules being connected to any one of the plurality of ports via an optical fiber, different access side optical modules being connected to different ports, each port corresponding to a pair of wavelengths, each pair of wavelengths comprising an upstream wavelength and a downstream wavelength, different ports corresponding to different upstream wavelengths and corresponding to different downstream wavelengths;

[0061] The intermediate device is used to transmit an optical signal of a downlink wavelength corresponding to each port to the access-side optical module connected to the port through each port of the multiple ports;

[0062] The first optical module among the multiple access-side optical modules is used to receive an optical signal of a first downstream wavelength transmitted by a first port to which the first optical module is connected, determine an upstream wavelength paired with the first downstream wavelength from a plurality of upstream wavelengths, obtain the first upstream wavelength, generate an optical signal of the first upstream wavelength, and transmit the optical signal of the first upstream wavelength to the first port, the plurality of upstream wavelengths including upstream wavelengths corresponding to the plurality of ports, the first optical module is any one of the multiple access-side optical modules, and the first downstream wavelength is a downstream wavelength corresponding to the first port;

[0063] The intermediate device is further configured to transmit an optical signal of the first upstream wavelength to the central optical module.

[0064] Specifically, to ensure successful transmission of both upstream and downstream optical signals by intermixing optical modules on the access side, the access-side optical modules perform uplink and downstream matching. For example, if the first optical module receives an optical signal at the first downstream wavelength, it determines the upstream wavelength corresponding to the first downstream wavelength from among multiple upstream wavelengths to obtain the first upstream wavelength. This matching of upstream and downstream wavelengths ensures the transmission reliability of both upstream and downstream optical signals. This solution improves the reliability of optical communications while also reducing the flexibility of optical networking and the difficulty of equipment maintenance and management.

[0065] The first optical module includes a plurality of single-frequency lasers corresponding to the plurality of uplink wavelengths, and each of the plurality of single-frequency lasers is capable of generating an optical signal of an uplink wavelength corresponding to the single-frequency laser; or

[0066] The first optical module includes a tunable laser, which can generate an optical signal of any one of the multiple upstream wavelengths.

[0067] Optionally, the first optical module further includes a first combiner, the laser in the first optical module is connected to the first combiner via an optical fiber, and the first combiner is connected to the first port via an optical fiber;

[0068] The first combiner is capable of receiving an optical signal of any one of the multiple upstream wavelengths, and performs multiplexing processing on the received optical signal of the upstream wavelength before transmitting the signal to the first port.

[0069] In a tenth aspect, an optical communication method is provided, which is applied to a first optical module among multiple access-side optical modules included in an optical networking system, the optical networking system also including an intermediate device, the intermediate device including multiple ports, each access-side optical module in the multiple access-side optical modules being connected to any one of the multiple ports, wherein the first optical module is connected to a first port among the multiple ports, each port corresponding to a pair of wavelengths, each pair of wavelengths including an upstream wavelength and a downstream wavelength, different ports corresponding to different upstream wavelengths and corresponding to different downstream wavelengths; the method comprising:

[0070] receiving an optical signal of a first downstream wavelength transmitted by the first port, where the first downstream wavelength is a downstream wavelength corresponding to the first port;

[0071] Determine an upstream wavelength paired with the first downstream wavelength from a plurality of upstream wavelengths to obtain the first upstream wavelength, wherein the plurality of upstream wavelengths include upstream wavelengths corresponding to a plurality of ports;

[0072] generating an optical signal of a first upstream wavelength;

[0073] An optical signal of a first upstream wavelength is transmitted to the first port.

[0074] The first optical module includes a plurality of single-frequency lasers corresponding to the plurality of uplink wavelengths, and each of the plurality of single-frequency lasers is capable of generating an optical signal of an uplink wavelength corresponding to the single-frequency laser; or

[0075] The first optical module includes a tunable laser, which can generate an optical signal of any one of the multiple upstream wavelengths.

[0076] In an eleventh aspect, a communication device is provided, wherein the communication device has the function of implementing the optical communication method in the tenth aspect. The communication device includes one or more modules, wherein the one or more modules are used to implement the optical communication method provided in the tenth aspect.

[0077] In a twelfth aspect, an optical networking system is provided, which includes a central optical module, an intermediate device, and multiple access side optical modules. The central optical module is connected to the intermediate device through an optical fiber. The intermediate device includes multiple ports, a first combiner, and an optical cross module. Each of the multiple access side optical modules is connected to any one of the multiple ports through an optical fiber. Different access side optical modules are connected to different ports. The optical cross module includes multiple first input ports and multiple first output ports. The first combiner includes a second output port and multiple second input ports. The multiple first input ports are connected to the multiple ports in a one-to-one correspondence. The multiple first output ports are connected to the multiple second input ports in a one-to-one correspondence. Each second input port corresponds to an uplink wavelength, and different second input ports correspond to different uplink wavelengths.

[0078] Each of the multiple access side optical modules is used to generate an optical signal of any uplink wavelength and transmit the optical signal of the uplink wavelength to the port to which the access side optical module is connected, and the uplink wavelengths of the optical signals generated by different access side optical modules are different;

[0079] The optical cross-connect module is configured to receive, through the plurality of first input ports, optical signals of a plurality of upstream wavelengths transmitted by the plurality of ports, and perform optical cross-connection on the plurality of upstream wavelength optical signals so that each of the plurality of first output ports outputs an optical signal of a target wavelength, where the target wavelength is an upstream wavelength corresponding to the second input port to which the first output port is connected;

[0080] The first combiner is used to receive the multiple upstream wavelength optical signals output by the multiple first output ends through the multiple second input ends, combine the multiple upstream wavelength optical signals into a first upstream optical signal, and transmit the first upstream optical signal to the central optical module through the second output end.

[0081] Specifically, the optical cross-connect module within the intermediate device achieves uplink and downlink matching, ensuring that even when intermixing optical modules on the access side, the uplink optical signals generated by the access side modules can be successfully transmitted to the central optical module through the intermediate device. This improves the reliability of optical communications, reduces the flexibility of optical networking, and reduces the difficulty of equipment maintenance and management.

[0082] In a thirteenth aspect, an optical communication method is provided, which is applied to an intermediate device in an optical networking system, the optical networking system further comprising a central optical module and a plurality of access side optical modules, the intermediate device comprising a plurality of ports, a first combiner and an optical cross module, each of the plurality of access side optical modules being connected to any one of the plurality of ports via an optical fiber, different access side optical modules being connected to different ports, the optical cross module comprising a plurality of first input ports and a plurality of first output ports, the first combiner comprising an output port and a plurality of second input ports, the plurality of first input ports being connected one-to-one with the plurality of ports, the plurality of first output ports being connected one-to-one with the plurality of second input ports, each second input port corresponding to an upstream wavelength, and different second input ports corresponding to upstream wavelengths being different; the method comprising:

[0083] The optical cross-connect module receives optical signals of multiple upstream wavelengths transmitted by the multiple ports through the multiple first input ports, the optical signals of the upstream wavelengths being generated by the access-side optical modules, different access-side optical modules generating optical signals having different upstream wavelengths, and each access-side optical module being configured to generate an optical signal of any one of the upstream wavelengths;

[0084] The optical cross-link module performs optical cross-linking on the multiple upstream wavelength optical signals so that each of the multiple first output ends outputs an optical signal of a target wavelength, where the target wavelength is an upstream wavelength corresponding to the second input end connected to the first output end;

[0085] The first combiner receives the multiple upstream wavelength optical signals output by the multiple first output ends through the multiple second input ends, combines the multiple upstream wavelength optical signals into a first upstream optical signal, and transmits the first upstream optical signal to the central optical module through the second output end.

[0086] In a fourteenth aspect, a communication device is provided, wherein the communication device has the function of implementing the optical communication method in the thirteenth aspect. The communication device includes one or more modules, wherein the one or more modules are used to implement the optical communication method provided in the thirteenth aspect.

[0087] In a fifteenth aspect, a communication device is provided, comprising a processor and a memory, wherein the memory is used to store a program for executing the optical communication method provided in the second aspect, third aspect, sixth aspect, seventh aspect, tenth aspect, or thirteenth aspect, and to store data involved in implementing the optical communication method provided in the second aspect, third aspect, sixth aspect, seventh aspect, tenth aspect, or thirteenth aspect. The processor is configured to execute the program stored in the memory. The communication device may further comprise a communication bus for establishing a connection between the processor and the memory.

[0088] In the sixteenth aspect, a computer-readable storage medium is provided, in which instructions are stored. When the computer-readable storage medium is run on a computer, the computer executes the steps of the optical communication method provided in the second aspect, the third aspect, the sixth aspect, the seventh aspect, the tenth aspect, or the thirteenth aspect.

[0089] In the seventeenth aspect, a computer program product comprising instructions is provided, which, when executed on a computer, enables the computer to execute the steps of the optical communication method provided in the second aspect, the third aspect, the sixth aspect, the seventh aspect, the tenth aspect, or the thirteenth aspect.

[0090] The technical effects obtained by the above-mentioned second to fourth aspects are similar to the technical effects obtained by the corresponding technical means in the first aspect, and will not be repeated here. The technical effects obtained by the above-mentioned sixth to eighth aspects are similar to the technical effects obtained by the corresponding technical means in the fifth aspect, and will not be repeated here. The technical effects obtained by the above-mentioned tenth to eleventh aspects are similar to the technical effects obtained by the corresponding technical means in the ninth aspect, and will not be repeated here. The technical effects obtained by the above-mentioned thirteenth to fourteenth aspects are similar to the technical effects obtained by the corresponding technical means in the twelfth aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] Figure 1 This is an architecture diagram of an optical networking system provided in an embodiment of the present application;

[0092] Figure 2 This is an architecture diagram of another optical networking system provided in an embodiment of the present application;

[0093] Figure 3 This is an architecture diagram of another optical networking system provided in an embodiment of the present application;

[0094] Figure 4 This is an architecture diagram of another optical networking system provided in an embodiment of the present application;

[0095] Figure 5 This is an architecture diagram of another optical networking system provided in an embodiment of the present application;

[0096] Figure 6 This is an architecture diagram of another optical networking system provided in an embodiment of the present application;

[0097] Figure 7 This is an architecture diagram of another optical networking system provided in an embodiment of the present application;

[0098] Figure 8 This is an architecture diagram of another optical networking system provided in an embodiment of the present application;

[0099] Figure 9 This is an architecture diagram of another optical networking system provided in an embodiment of the present application;

[0100] Figure 10 This is an architecture diagram of another optical networking system provided in an embodiment of the present application;

[0101] Figure 11 This is an architecture diagram of another optical networking system provided in an embodiment of the present application;

[0102] Figure 12 This is a flow chart of an optical communication method provided by an embodiment of the present application;

[0103] Figure 13 is a flow chart of another optical communication method provided by an embodiment of the present application;

[0104] Figure 14 This is a flow chart of another optical communication method provided in an embodiment of the present application;

[0105] Figure 15 This is a flow chart of another optical communication method provided in an embodiment of the present application;

[0106] Figure 16 This is a schematic diagram of the structure of a communication device provided in an embodiment of the present application;

[0107] Figure 17 This is a schematic diagram of the structure of another communication device provided in an embodiment of the present application;

[0108] Figure 18 This is a structural diagram of another communication device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0109] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0110] To facilitate understanding, some terms involved in the embodiments of this application are first introduced.

[0111] Wavelength division multiplexing (WDM): abbreviated as WDM, usually uses multiple wavelengths to achieve multitasking. WDM is a data transmission technology. In an optical networking system (also known as an optical communication system), different optical signals are carried by different colors (i.e., wavelengths or frequencies), and multiple optical signals of different wavelengths are multiplexed and transmitted on a single optical fiber. The optical networking system and optical communication method provided in the embodiments of the present application are applied to the WDM system, solving the problem of the inability to mix and match access-side optical modules in the WDM system of the related art.

[0112] Point to multi-point (P2MP): A transmission mode that transmits data from one source to one or more receivers.

[0113] Passive optical network (PON): As an emerging broadband access fiber technology covering the last mile, it does not require node equipment at the optical branching point, only a simple optical splitter is required. Therefore, it has the advantages of saving optical cable resources, sharing bandwidth resources, saving equipment room investment, high equipment security, fast network construction, and low overall network construction cost. The intermediate device in the embodiment of this application is a passive device that can be used in a passive optical network.

[0114] Next, the background knowledge of the embodiments of this application is introduced.

[0115] The embodiments of this application are designed for the evolution of campus network architecture, but are not limited to campus networks. The demand for this solution is triggered by the evolution of campus networks to all-optical campuses, so the embodiments of this application will be explained according to the evolution of campus architecture and the route of this solution.

[0116] First, let’s introduce the architecture of traditional campus networks, what drives the evolution of campus network architecture, and the direction of evolution.

[0117] In traditional campus networks, the network structure is primarily a tree-like structure, with a three-layer network being the most typical example. The three layers are the access layer, the aggregation layer, and the core layer. In traditional structures, the access layer directly extends network cables to network-using devices (also known as user devices, such as personal computers (PCs) and Wi-Fi devices). The aggregation layer aggregates north-south data and exchanges east-west data. The access layer primarily connects downward (to network-using devices) via network cables. Optical fiber is typically used to connect the access layer to the aggregation layer, and vice versa. Connections between each layer are point-to-point (P2P). Neither optical fiber nor network cables converge; data convergence and exchange occur only at switches.

[0118] The specific location of the three-tier structure varies slightly in different types of parks.

[0119] In large campuses, network construction is typically based on buildings. A core switching area (i.e., the core layer) is set up for the entire campus. Each building can be constructed using a two-layer tree structure, with each building acting as an independent convergence point. When a large campus adopts this tree structure, data exchange within the same building can be completed within the building, while data exchange between buildings is completed through the core layer.

[0120] Medium-sized campuses typically use a two-tier architecture, but a three-tier architecture can also be adopted depending on network scale and business needs. A three-tier architecture is suitable when there are many network access points and multiple aggregation points are required. For example, in a new office building, a weak current room on each floor can serve as an aggregation point, with the entire building adopting a three-tier architecture with a core layer. A three-tier architecture is suitable when different business operations require isolation, such as when departments require separate aggregation points for each business type or department.

[0121] Having briefly introduced the traditional three-tier architecture of campus networks, we will now introduce the next-generation campus architecture (i.e., the all-optical campus architecture). Current research in the field of all-optical campuses is primarily divided into two systems: the passive optical LAN (POL) solution based on PON technology, and the all-optical Ethernet solution based on traditional Ethernet. Both systems have their own advantages and disadvantages. This solution aims to integrate these two systems, achieving a deep convergence of Internet Protocol (IP) and optical communication.

[0122] Among them, POL is a local area network based on PON technology, which provides users with integrated data, voice, video and other weak current services through optical fiber. POL is a solution that directly applies access network PON technology to the campus. Taking the traditional three-layer campus network as an example to illustrate the application of POL in the campus network, POL replaces the access and aggregation layers, placing the optical line terminal (OLT) equipment and the core layer switch together, and using passive splitters and optical fibers in the middle to complete the P2MP connection. Compared with traditional solutions, POL can simplify the network architecture and realize the transformation of a three-layer network into a two-layer network. At the same time, because the optical network units (ONUs) of the OLT equipment and user equipment are placed at both ends of the network, the intermediate link can be made completely passive, reducing the amount of equipment maintenance and reducing the power consumption of the equipment. In addition, the P2MP design can significantly save the use of optical fiber and reduce the space required for equipment deployment.

[0123] The application of PON technology in all-optical campuses has triggered the evolution of traditional Ethernet networks towards all-optical solutions. Key challenges faced by traditional campus network solutions include: a lack of direct fiber optic access to every room, multiple network layers, a high number of optical fibers and cables, and active devices in all interconnected links. To address these challenges, exploration of Ethernet-based all-optical campuses has begun.

[0124] In the fiber-to-the-home scenario, the user-side switch is miniaturized and its functions are weakened to obtain a box-type access switch. For example, a 24-port box-type access switch can be placed directly on the user's desktop to form a 4-port or 8-port desktop switch, thus realizing direct fiber pulling.

[0125] As can be seen from the foregoing, the embodiments of the present application are mainly used in wavelength division systems, and in the current wavelength division scheme, the access side optical module needs to be aligned with the port of the combiner / splitter, that is, the access side optical module and the port of the combiner / splitter cannot be mixed. For example, the optical fiber connected to the access side optical module 1 needs to be plugged into port 1 of the combiner / splitter, and cannot be plugged into other ports. The access device is usually located in the user's room, and the combiner / splitter may be located in the central computer room of the building, which is far away. It may take multiple attempts to pair the optical fibers connected to multiple access side optical modules, which is very time-consuming and labor-intensive. In addition, these multiple access side optical modules require multiple different codes to correspond to different upstream and downstream wavelengths through different codes.

[0126] The embodiments of the present application can realize the mixed insertion or normalization of color light scattered optical modules (i.e., access side optical modules) of the wavelength division system, thereby improving the networking flexibility of optical communications and reducing the difficulty of equipment management and maintenance.

[0127] Next, the implementation environment involved in the embodiments of this application is introduced.

[0128] Figure 1 This is an architecture diagram of an optical networking system provided by an embodiment of the present application. The optical networking system can also be called an optical communication system. Figure 1 The system includes a central optical module, an intermediate device, and multiple access-side optical modules. The central optical module is connected to the intermediate device via an optical fiber. The intermediate device includes multiple ports. Each of the multiple access-side optical modules is connected to any port of the intermediate device via an optical fiber, with different access-side optical modules connected to different ports.

[0129] The multiple access side optical modules can be mixed and inserted into the multiple ports, without having to worry about the correspondence between the ports, access side optical modules, and upstream and downstream wavelengths. In other words, each access side optical module can be connected to any port, and the multiple access side optical modules can be inserted into the multiple ports of the intermediate device in a random order.

[0130] In the embodiments of the present application, the access-side optical module is inserted into the access device, or the access-side optical module is integrated into the access device, and the access device is used to access the above-mentioned optical networking system through the access-side optical module. Similarly, the central optical module is inserted into the routing switching device, or the central optical module is integrated into the routing switching device, and the routing switching device is used to communicate with the access device through the central optical module.

[0131] Access devices can be referred to in the industry as optical access devices, access points (APs), or other devices. Access devices can also be called optical access devices, optical line terminals, or other names. Routing and switching devices can be switches (such as local area network switches (LSWs)) or routers. Routing and switching devices can also be called central switches, core switches, or other names. Central optical modules can also be called core-side optical modules or central-end optical modules. Access-side optical modules can also be called terminal optical modules.

[0132] The central optical module, the intermediate device and the multiple access side optical modules are used to perform optical communication according to the optical communication method provided in the embodiment of the present application, that is, to transmit uplink and downlink information through optical signals. In order to realize the hybrid insertion of optical modules, the embodiment of the present application provides a variety of specific implementation methods. Figures 2 to 15 This paper introduces various specific implementation methods.

[0133] Figure 2 and Figure 3 This is an architecture diagram of two optical networking systems provided in the embodiment of the present application. Figure 2 and Figure 3The specific process of transmitting downlink information and uplink information in the first specific implementation is described below. The first specific implementation mainly enables the normalization of the access side optical module into a gray optical module.

[0134] First, the specific process of transmitting downlink information is introduced.

[0135] In a wavelength division multiplexing (WDM) system, downstream information is transmitted using optical signals with downstream wavelengths. Each port on an intermediate device corresponds to a specific downstream wavelength, and different ports correspond to different downstream wavelengths. For example, if an intermediate device has eight ports, each of these eight ports corresponds to eight different downstream wavelengths. Furthermore, each downstream wavelength is matched with an upstream wavelength, and different downstream wavelengths correspond to different upstream wavelengths.

[0136] During the transmission of downlink information, the central optical module is configured to transmit a first downlink optical signal to an intermediate device. The first downlink optical signal has multiple downlink wavelengths, including the downlink wavelength corresponding to at least one port of the intermediate device. The first downlink optical signal carries downlink information transmitted to at least one access device. The intermediate device is configured to receive a second downlink optical signal, decompose the second downlink optical signal into optical signals of the multiple downlink wavelengths, and transmit, via each of the multiple ports, an optical signal of the downlink wavelength corresponding to the port to which the port is connected to the access-side optical module. The multiple downlink optical signals each carry downlink information transmitted to the corresponding access device. Each of the multiple access-side optical modules is configured to receive an optical signal of the downlink wavelength transmitted from the port to which the access-side optical module is connected. The at least one access device is the access device to which the at least one access-side optical module belongs, and the at least one access-side optical module is the access-side optical module connected to the at least one port. The second downlink optical signal is the optical signal of the first downlink optical signal transmitted via the optical fiber between the central optical module and the intermediate device. Similarly, the optical signal of the downlink wavelength received by the access-side optical module is the optical signal of the downlink wavelength transmitted by the port via the optical fiber between the access-side optical module and the port.

[0137] It should be understood that, given the loss of optical signals during transmission over longer distances of optical fiber, the optical signal sent by the central optical module is not exactly the same as the optical signal received by the intermediate device, nor is the optical signal sent by the intermediate device exactly the same as the optical signal received by the access-side optical module. For this reason, in the embodiments of this application, terms such as "first," "second," "third," and "fourth" are used to distinguish between the transmitted and received optical signals. For example, the first downlink optical signal mentioned above becomes the second downlink optical signal due to loss after transmission through the optical fiber.

[0138] The first downstream optical signal and the second downstream optical signal are both composite optical signals (such as color optical signals). The intermediate device divides the received composite optical signal into multiple single-wavelength optical signals, thereby transmitting a downstream wavelength optical signal to each access-side optical module.

[0139] The at least one access side optical module mentioned above includes the access side optical module currently in communication. For example, when all access side optical modules in the optical networking system are currently in communication, the at least one access side optical module includes all access side optical modules in the optical networking system. The at least one port herein is similar.

[0140] Among them, the central optical module includes a second combiner, the intermediate device also includes a second splitter, and the first splitter is connected to the above-mentioned multiple ports respectively through optical fibers; the second combiner is used to obtain the optical signals of the above-mentioned multiple downstream wavelengths, combine the optical signals of the above-mentioned multiple downstream wavelengths into a first downstream optical signal, and transmit the first downstream optical signal to the second splitter; the second splitter is used to receive the second downstream optical signal, and divide the second downstream optical signal into the optical signals of the above-mentioned multiple downstream wavelengths by energy splitting, and transmit the optical signal of the downstream wavelength corresponding to the port among the multiple ports corresponding to the multiple downstream wavelengths.

[0141] That is, the second combiner is capable of combining multiple input signals of different wavelengths into a single signal. In this embodiment of the present application, the second combiner has multiple input ports and one output port. The multiple input ports correspond one-to-one to the multiple downstream wavelengths. Each input port is configured to receive an optical signal of the downstream wavelength corresponding to the input port, and the output port is configured to output the combined first downstream optical signal.

[0142] See also Figure 2 and Figure 3 The second combiner in the central optical module can be implemented by a multiplexer (MUX), or in some other embodiments, it can also be implemented by other devices with similar functions, which is not limited in the embodiments of the present application.

[0143] The second splitter is capable of splitting a composite optical signal having multiple wavelengths into multiple single-wavelength optical signals of different wavelengths. For example, the second splitter has an input end and multiple output ends, each of which is connected to the multiple ports in a one-to-one correspondence. The input end is configured to receive the second downstream optical signal, and each of the multiple output ends is configured to output an optical signal having a downstream wavelength corresponding to the port to which it is connected.

[0144] See also Figure 2 and Figure 3The second demultiplexer in the intermediate device can be implemented by a demultiplexer (DEMUX), or in some other embodiments, it can also be implemented by other devices with similar functions, which is not limited in the embodiments of the present application.

[0145] Optionally, the central optical module further includes a plurality of optoelectronic conversion submodules, the second combiner is connected to the plurality of optoelectronic conversion submodules respectively through optical fibers, each optoelectronic conversion submodule corresponds to an upstream wavelength and a downstream wavelength having a matching relationship, and different optoelectronic conversion submodules correspond to different upstream wavelengths and corresponding downstream wavelengths. Each optoelectronic conversion submodule is used to obtain a routing switching device (such as Figure 2 and Figure 3 The optical combiner receives a first downstream electrical signal transmitted by the optical-to-electrical converter (LSW) as shown, converts the first downstream electrical signal into an optical signal of a downstream wavelength corresponding to the optoelectronic conversion submodule, and transmits the optical signal of the downstream wavelength corresponding to the optoelectronic conversion submodule to a second combiner. The second combiner is configured to obtain the optical signals of the multiple downstream wavelengths transmitted by the multiple optoelectronic conversion submodules. The first downstream electrical signal carries downstream information.

[0146] Each of the plurality of photoelectric conversion submodules includes a photodiode (PD) and a laser diode (LD). Figure 2 and Figure 3 For example, a central optical module includes three optoelectronic conversion submodules. The first optoelectronic conversion submodule includes LD1 and PD1, the second optoelectronic conversion submodule includes LD2 and PD2, and the third optoelectronic conversion submodule includes LD3 and PD3. In other embodiments, the optoelectronic conversion submodules may also be represented by O / E (E / O), where 'O' stands for optical and 'E' stands for electricity. Each optoelectronic conversion submodule is responsible for performing optoelectronic conversion on the received optical signal.

[0147] It should be understood that the fact that LD1, LD2, and LD3 are drawn in a box in the figure does not mean that the physical locations of LD1, LD2, and LD3 must be together. Similarly, the fact that PD1, PD2, and PD3 are drawn in a box does not mean that the physical locations of PD1, PD2, and PD3 must be together. The physical locations of these components can be set according to actual conditions, and the embodiments of the present application do not limit this. For example, LD1 and PD1 can be set together, LD2 and PD2 can be set together, and LD3 and PD3 can be set together. The same principle applies to similar places in the subsequent embodiment figures, which will not be repeated in the following text.

[0148] Alternatively, see Figure 2The intermediate device also includes a splitter, which is called a first splitter, and the central optical module also includes a splitter, which is called a second splitter. The first splitter is connected to the second splitter and the second wave splitter respectively through optical fibers, and the second splitter is also connected to the second wave combiner through optical fibers; the second wave combiner is also used to transmit the first downstream optical signal to the second splitter; the second splitter is used to transmit the first downstream optical signal to the first splitter; the first splitter is used to receive the second downstream optical signal and transmit the second downstream optical signal to the second wave splitter.

[0149] It should be understood that, for the sake of ease of understanding and simplicity, since the loss of optical signals transmitted in the same device is very small and almost negligible, the naming of optical signals in the same device is simplified in the embodiments of the present application. In the absence of misunderstanding, the optical signals sent and received between different modules within the same device are named as the same optical signal. For example, the optical signal sent by the first optical splitter to the second splitter and the optical signal received by the second splitter are both called the second downstream optical signal. In fact, due to the loss in optical fiber transmission, there may be certain differences between the optical signal sent by the module and the optical signal received by the opposite module. For example, there may be certain differences between the second downstream optical signal sent by the first optical splitter to the second splitter and the second downstream optical signal received by the second splitter.

[0150] Alternatively, see Figure 3 The second combiner of the central optical module is directly connected to the second splitter of the intermediate device through an optical fiber; the second combiner is also used to directly transmit the first downlink optical signal to the second splitter.

[0151] In an embodiment of the present application, the access side optical module includes a PD, which is connected to the port of the intermediate device through an optical fiber. The PD is used to receive an optical signal of a downstream wavelength transmitted by the connected port, perform photoelectric conversion on the received optical signal of the downstream wavelength to obtain a second downstream electrical signal, and transmit the second downstream electrical signal to other modules of the access device, so that the other modules of the access device can obtain corresponding downstream information from the second downstream electrical signal, or transmit the second downstream electrical signal to the user terminal connected to the access device.

[0152] The above describes the transmission process of downlink information. Next, the transmission process of uplink information will be described.

[0153] In a wavelength division multiplexing (WDM) system, uplink information is transmitted via optical signals with upstream wavelengths. Each downstream wavelength is also matched with an upstream wavelength, and different downstream wavelengths are matched with different upstream wavelengths. For example, eight downstream wavelengths are matched with eight different upstream wavelengths. In the embodiments of the present application, the upstream wavelength is different from the downstream wavelength, for example, the upstream wavelength is greater than the downstream wavelength, or the upstream wavelength is smaller than the downstream wavelength. This facilitates the transmission of uplink and downlink signals on a single optical cable, simplifying networking.

[0154] During the transmission of uplink information, each of the multiple access-side optical modules is further configured to generate an optical signal of a specified wavelength and transmit the optical signal of the specified wavelength to the port to which it is connected. The optical signals generated by the multiple access-side optical modules have the same specified wavelength. In this way, the multiple access-side optical modules are normalized into gray optical modules, generating optical signals of the same wavelength. It should be understood that although the wavelengths of the optical signals generated by the multiple access-side optical modules are the same specified wavelength, the uplink information they carry may differ.

[0155] Optionally, the access-side optical module further includes a second laser, which is connected to the port via an optical fiber; the second laser is used to generate an optical signal of a specified wavelength and transmit the optical signal of the specified wavelength to the connected port.

[0156] The second laser is a single-wavelength laser, i.e., a single-frequency laser, or a wavelength-tunable laser. For example, the second laser includes a laser diode (LD), which is capable of generating gray light of a single frequency (i.e., an optical signal of a single wavelength), or is capable of generating optical signals of multiple wavelengths. In the embodiment of the present application, the LD is used to generate an optical signal of a specified wavelength.

[0157] The intermediate device is further configured to obtain, through the aforementioned multiple ports, multiple optical signals of the same specified wavelength transmitted by the multiple access-side optical modules, generate an optical signal of an upstream wavelength that matches the downstream wavelength corresponding to each port based on the optical signal of the specified wavelength received by each port, and transmit the generated optical signal of the upstream wavelength to the central optical module. In other words, matching of upstream and downstream wavelengths is achieved within the intermediate device. This ensures that even if the multiple access-side optical modules are mixed, upstream and downstream matching can be achieved, thereby ensuring communication reliability.

[0158] Wherein, the intermediate device includes at least one first laser, which is used to generate the optical signal of the above-mentioned upstream wavelength. In order to enable the first laser to generate the optical signal, the first laser needs to be powered. In an embodiment of the present application, any of the at least one first laser is powered by an external power supply of the intermediate device, that is, the intermediate device has an external power supply, and the external power supply is used to power any first laser; or, an optoelectronic composite cable (wrapped with optical fiber) is connected between the above-mentioned access side optical module and the port of the intermediate device, and any first laser is powered by the optoelectronic composite cable, that is, the access side optical module is also used to power any first laser through the optoelectronic composite cable; or, a cable is connected between the above-mentioned access side optical module and the port of the intermediate device, and any first laser is powered by the cable, that is, the access side optical module is also used to power any first laser through the cable. It should be understood that at least an optical cable is connected between the access side optical module and the intermediate device, and the optical cable is used to transmit optical signals. The optical cable may be an independent cable or a cable in the optoelectronic composite cable.

[0159] Optionally, when the intermediate device includes multiple first lasers, the power supply modes of the first lasers are the same, or the power supply modes of the multiple first lasers may be different.

[0160] The number of the at least one first laser may be equal to the number of the multiple ports, or may be less than the number of the multiple ports.

[0161] In order to ensure the communication quality of each access device, the number of the at least one first laser is equal to the number of the multiple ports. Figure 2 and Figure 3 As shown, each of the multiple ports is connected to a first laser. Each first laser is used to generate an optical signal of an upstream wavelength that matches a downstream wavelength corresponding to the port to which the first laser is connected.

[0162] Optionally, each of the multiple access-side optical modules is connected to a port of an intermediate device via an optoelectronic composite cable, and each access-side optical module is further configured to power the first laser connected to the access-side optical module via the optoelectronic composite cable to which the access-side optical module is connected. That is, each first laser is powered by the optoelectronic composite cable connected to the port to which the first laser is connected. In this way, the access-side optical module provides power to the first lasers on a one-to-one basis, and a power failure or malfunction of one access-side optical module only affects the first laser on that route, and has no effect on the optical communications of other access devices. The inability to conduct optical communications is due to a problem with the access-side optical module on the route that is experiencing a power failure or malfunction, rather than due to the inability to conduct optical communications during the process of transmitting optical signals by the intermediate device. Therefore, the one-to-one power supply method itself does not affect optical communications.

[0163] When the access side optical module is inserted into the access device, the power of the access side optical module comes from the access device or from the access side optical module itself. When the access device includes the access side optical module, the power of the access side optical module comes from the power supply of the access device (such as an external power supply or an internal power supply) or from the access side optical module itself.

[0164] Optionally, the intermediate device is used to combine the optical signals of multiple upstream wavelengths generated by the intermediate device into a first upstream optical signal, and transmit the first upstream optical signal to the central optical module; the central optical module is also used to receive the second upstream optical signal and decompose the second upstream optical signal into the optical signals of the multiple upstream wavelengths. Each optical signal of the upstream wavelength carries the upstream information transmitted by the corresponding access device, and the first upstream optical signal carries the upstream information transmitted by the above-mentioned multiple access devices. The second upstream optical signal is the optical signal of the first upstream optical signal after being transmitted through the optical fiber between the intermediate device and the central optical module. That is, the optical signal of the specified wavelength transmitted by the access-side optical module is a single-wavelength signal (i.e., a gray light signal), and the first upstream optical signal is a composite optical signal (such as a color light signal).

[0165] Alternatively, see Figure 2 and Figure 3 The intermediate device also includes a combiner, which is called a first combiner. The central optical module also includes a demultiplexer, which is called a first demultiplexer. The first combiner is connected to the above-mentioned multiple first lasers through optical fibers respectively; the first combiner is used to combine the above-mentioned multiple upstream wavelength optical signals into a first upstream optical signal; the first demultiplexer is used to decompose the second upstream optical signal into the above-mentioned multiple upstream wavelength optical signals according to wavelength.

[0166] That is, the first combiner can combine multiple input signals into one signal. In the embodiment of the present application, the functions and structures of the first combiner and the second combiner are similar and will not be described in detail here.

[0167] See also Figure 2 and Figure 3 The first combiner can be implemented by a multiplexer (MUX) or by other devices with similar functions, which is not limited in the embodiments of the present application.

[0168] The first splitter is capable of splitting a single signal into multiple signals of different wavelengths based on wavelength. For example, the first splitter has an input port and multiple output ports, each of which corresponds one-to-one to multiple upstream wavelengths. Each output port is connected to one of the multiple optoelectronic conversion submodules according to the corresponding upstream wavelength. That is, the upstream wavelength corresponding to each output port is the same as the upstream wavelength corresponding to the connected optoelectronic conversion submodule. The input port of the first splitter is used to receive the first upstream optical signal, and the multiple output ports are used to output optical signals of the corresponding upstream wavelengths to the connected optoelectronic conversion submodules.

[0169] See also Figure 2 and Figure 3 The first splitter can be implemented by a demultiplexer (DEMUX) or by other devices with similar functions, which is not limited in the embodiments of the present application.

[0170] Each optoelectronic conversion submodule is used to convert the received optical signal into a first uplink electrical signal after receiving the optical signal of the uplink wavelength corresponding to the optoelectronic conversion submodule, and transmit the first uplink electrical signal to other modules of the routing and switching device, so that the routing and switching device can obtain corresponding uplink information from the first uplink electrical signal, or perform other processing on the first uplink electrical signal, such as transmitting the first uplink electrical signal to other network devices.

[0171] From the above, it can be seen that in one implementation, if Figure 2 As shown, the intermediate device also includes a first optical splitter, and the central optical module also includes a second optical splitter. Then, optionally, the first optical splitter is also connected to the first combiner through an optical fiber, and the second optical splitter is also connected to the first splitter through an optical fiber; the first combiner is also used to transmit the first uplink optical signal to the first optical splitter; the first optical splitter is used to transmit the first uplink optical signal to the second optical splitter; the second optical splitter is used to receive the second uplink optical signal and transmit the second uplink optical signal to the first splitter.

[0172] In another implementation, Figure 3 As shown, the first wave splitter of the central optical module is directly connected to the first wave combiner of the intermediate device through an optical fiber; the first wave combiner is used to directly transmit the first uplink optical signal to the first wave splitter.

[0173] Considering both upstream and downstream, if the intermediate device includes a first optical splitter and the central optical module includes a second optical splitter, communication between the intermediate device and the central optical module can be achieved by connecting the first and second optical splitters via a single optical cable, simplifying networking. If the second combiner of the central optical module is directly connected to the second splitter of the intermediate device via optical fiber, and if the first splitter of the central optical module is directly connected to the first combiner of the intermediate device via optical fiber, communication between the intermediate device and the central optical module can also be achieved using two optical cables.

[0174] It should be noted that the first and second optical splitters can filter upstream and downstream optical signals based on the difference in upstream and downstream wavelengths. For example, if the upstream wavelength is greater than a first threshold and the downstream wavelength is less than the first threshold, the first optical splitter will treat the optical signal with a wavelength greater than the first threshold as the upstream optical signal and transmit it to the central optical module, and treat the optical signal with a wavelength less than the first threshold as the downstream optical signal and transmit it to the first optical splitter.

[0175] Combine Figure 2 and Figure 3 From the above-mentioned first specific implementation method, multiple access side optical modules can be mixed and inserted due to normalization. This optical networking method is more flexible and reduces the difficulty of equipment management and maintenance.

[0176] Optionally, each of the multiple ports of the intermediate device is implemented as a physical port that can both receive optical signals from the access-side optical module and transmit optical signals to the access-side optical module. Alternatively, each of the multiple ports is implemented as a pair of physical ports, including an uplink port and a downlink port, wherein the uplink port is used to receive optical signals from the access-side optical module and the downlink port is used to transmit optical signals to the access-side optical module. Regardless of whether each port of the intermediate device is implemented as a single physical port or a pair of physical ports, each port is connected to the access-side optical module via two optical cables, so that the uplink optical signal and the downlink optical signal are transmitted respectively via the two optical cables.

[0177] Taking the number of the multiple access side optical modules as 8 as an example, the 8 access side optical modules can be mixed into the 8 ports of the intermediate device. Each of these 8 ports includes two physical ports. Then each of these 8 access side optical modules is connected to the two physical ports included in one port through 2 optical cables.

[0178] As can be seen from the above, this solution can be applied to campus optical networking. The campus's central switch, serving as a routing and switching device, typically includes multiple central optical modules. Each central optical module communicates with multiple access-side optical modules, thereby enabling a large-scale optical networking system. Each central optical module and its connected access-side optical modules can achieve flexible networking according to the first specific implementation method described above.

[0179] For example, a routing switch device includes eight central optical modules. Each of these eight central optical modules is connected to eight access-side optical modules via an intermediate device. This routing switch device can communicate with 64 access-side optical modules, and the eight access-side optical modules connected to each central optical module can be intermixed on the eight ports of the intermediate device connected to this central optical module. If these 64 access-side optical modules are divided into eight groups based on their connection relationships with the central optical modules, the first specific implementation method described above can achieve intra-group intermixing of optical modules. Each group includes eight access-side optical modules connected to one central optical module.

[0180] Figure 4 and Figure 5 This is an architecture diagram of two optical networking systems provided in the embodiment of the present application. Figure 4 and Figure 5 The specific process of transmitting downlink information and uplink information in the second specific implementation method is described below. The second specific implementation method is mainly based on the light source pool injecting light source to the access side optical module through the intermediate device.

[0181] First, the specific process of transmitting uplink information is introduced.

[0182] In a wavelength division multiplexing (WDM) system, upstream information is transmitted via optical signals with upstream wavelengths. Each port on an intermediate device corresponds to a pair of wavelengths, one upstream wavelength and one downstream wavelength. Different ports correspond to different upstream and downstream wavelengths. For example, if an intermediate device has eight ports, these eight ports correspond to eight pairs of wavelengths.

[0183] During the transmission of uplink information, the intermediate device is used to transmit the optical signal to be modulated of the uplink wavelength corresponding to the port to the access-side optical module connected to the port through each of the multiple ports. The first optical module among the multiple access-side optical modules is used to receive the optical signal to be modulated of the first uplink wavelength, modulate the optical signal to be modulated of the first uplink wavelength to obtain the target optical signal of the first uplink wavelength, and transmit the target optical signal of the first uplink wavelength to the first port to which the first optical module is connected. The first optical module is any one of the multiple access-side optical modules, and the first downlink wavelength and the first uplink wavelength are a pair of wavelengths corresponding to the first port. The intermediate device is also used to transmit the target optical signal of the first uplink wavelength to the central optical module.

[0184] Optionally, the optical networking system further includes a light source pool connected to the intermediate device via an optical fiber. The light source pool is configured to generate optical signals to be modulated at multiple upstream wavelengths and transmit the optical signals to be modulated at multiple upstream wavelengths to the intermediate device, where the multiple upstream wavelengths include the upstream wavelength corresponding to at least one port.

[0185] Optionally, the light source pool is configured to combine the multiple upstream wavelength optical signals to be modulated into a first optical signal to be modulated, and transmit the first optical signal to be modulated to the intermediate device. The intermediate device is further configured to receive a second optical signal to be modulated, decompose the second optical signal to be modulated into the multiple upstream wavelength optical signals to be modulated, and the second optical signal to be modulated is an optical signal obtained by transmitting the first optical signal to be modulated via the optical fiber between the light source pool and the intermediate device.

[0186] For example, Figure 4 and Figure 5 As shown, the light source pool includes multiple lasers, all of which are color light lasers, or can be other types of lasers, which is not limited in the embodiments of the present application.

[0187] Optionally, the light source pool includes a first combiner, and the intermediate device further includes a first splitter. The first combiner and the first splitter are connected via an optical fiber. The first combiner is configured to combine the multiple upstream wavelength optical signals to be modulated into a first optical signal to be modulated, and transmit the first optical signal to be modulated to the second splitter. The first splitter is configured to receive the second optical signal to be modulated and decompose the second optical signal to be modulated into the multiple upstream wavelength optical signals to be modulated.

[0188] See also Figure 4 and Figure 5 The first demultiplexer can be implemented by a DEMUX, and the first combiner can be implemented by a MUX. Alternatively, the first demultiplexer or the first combiner can be implemented by other devices with similar functions, which is not limited in this embodiment of the present application.

[0189] Optionally, the intermediate device further includes a plurality of second combiners connected to the plurality of ports in a one-to-one correspondence via optical fibers, and the first optical module includes a second splitter and a first modulator. The reference combiner among the plurality of second combiners is used to combine the target optical signal of the first downstream wavelength with the optical signal to be modulated of the first upstream wavelength into a first downstream optical signal, and transmit the first downstream optical signal to the second splitter through the first port. The reference combiner is a second combiner connected to the first port. The functions of the other second combiners among the plurality of second combiners except the reference combiner are similar to those of the reference combiner and are not described in detail here.

[0190] The second demultiplexer is configured to receive the second downstream optical signal, decompose the second downstream optical signal into a target optical signal of the first downstream wavelength and an optical signal to be modulated of the first upstream wavelength, and transmit the optical signal of the first upstream wavelength to the first modulator. The second downstream optical signal is the optical signal of the first downstream optical signal after being transmitted through the optical fiber between the first port and the first optical module. The first modulator is configured to modulate the optical signal to be modulated of the first upstream wavelength to obtain a target optical signal of the first upstream wavelength, and transmit the target optical signal of the first upstream wavelength to the first port.

[0191] See also Figure 4 and Figure 5 The second demultiplexer can be implemented by a DEMUX, and the second combiner can be implemented by a MUX. Alternatively, the second demultiplexer or the second combiner can be implemented by other devices with similar functions, which is not limited in this embodiment of the present application.

[0192] The first port is connected to the second wave splitter and the first modulator via optical fibers, respectively. The first modulator is also connected to the second wave splitter via optical fibers. Thus, the intermediate device and the access-side optical module can be connected via two optical cables. One of these optical cables transmits the combined optical signal of the downstream target optical signal and the upstream optical signal to be modulated, while the other transmits the upstream target optical signal.

[0193] Alternatively, the optical networking system further includes a circulator, the circulator including a second port, a third port, and a fourth port, the second port being connected to the first port via an optical fiber, the third port being connected to the second wave splitter via an optical fiber, and the fourth port being connected to the first port via an optical fiber, and the first modulator including an input end and an output end, the input end of the first modulator being connected to the second wave splitter via an optical fiber, and the output end of the first modulator being connected to the third port via an optical fiber. In this manner, the intermediate device and the access-side optical module may be connected via the circulator and the optical fiber.

[0194] In addition to the two connection methods mentioned above, there can also be other connection methods between the port of the intermediate device and the access side optical module. For example, they can be connected through three optical cables, which respectively transmit the downstream target optical signal, the upstream optical signal to be modulated, and the upstream target optical signal.

[0195] The embodiments of the present application do not limit the specific location of the light source pool. For example, the light source pool can be set up separately, or in an intermediate device, or in a routing switch device. In the case where the light source pool is set up separately or in a routing switch device, the light source pool can be used for multiple access side optical modules (for example, for the 8 access side optical modules described above). That is, the light source pool is used to provide multiple access side optical modules with optical signals to be modulated at the upstream wavelength. Figure 6 The light source pool can provide an optical signal to be modulated at an upstream wavelength to each group of access-side optical modules through an optical splitter. The optical splitter can split a single signal into multiple signals by energy splitting. The optical splitter can be implemented by an optical splitter or other device with similar functions, and this embodiment of the application is not limited thereto.

[0196] Next, the specific process of transmitting downlink information is introduced.

[0197] During the transmission of downlink information, the intermediate device is configured to transmit, through each of the multiple ports, a target optical signal of a downlink wavelength corresponding to the port to the access-side optical module connected to the port. The target optical signal originates from the central optical module. Each of the multiple access-side optical modules is configured to receive the target optical signal of a downlink wavelength transmitted by the port to which the access-side optical module is connected.

[0198] The central optical module is configured to combine target optical signals of multiple downstream wavelengths into a third downstream optical signal, and transmit the third downstream optical signal to the intermediate device. The third downstream optical signal comprises the multiple downstream wavelengths, including the downstream wavelength corresponding to at least one port. The intermediate device is configured to receive a fourth downstream optical signal and decompose it into target optical signals of the multiple downstream wavelengths. The fourth downstream optical signal is the result of the third downstream optical signal being transmitted via the optical fiber between the central optical module and the intermediate device.

[0199] Optionally, the intermediate device further includes a third wave splitter, and the central optical module further includes a third wave combiner. The third wave combiner is configured to combine the target optical signals of the multiple downstream wavelengths into a third downstream optical signal, and transmit the third downstream optical signal to the intermediate device. The third wave splitter is configured to receive the fourth downstream optical signal, decompose the fourth downstream optical signal into target optical signals of multiple downstream wavelengths, and transmit the target optical signal of the downstream wavelength corresponding to the port connected to each second wave combiner to each of the multiple second wave combiners.

[0200] See also Figure 4 and Figure 5The third splitter can be implemented by a DEMUX, and the third combiner can be implemented by a MUX. Alternatively, the third splitter or the third combiner can be implemented by other devices with similar functions, which is not limited in this embodiment of the present application.

[0201] Alternatively, something like Figure 2 and Figure 3 The two connection modes between the intermediate device and the central optical module are shown. In the second specific implementation mode, the intermediate device and the central optical module also include at least these two connection modes, which are respectively as follows: Figure 4 and Figure 5 As shown, no repetition is given here.

[0202] Figures 4 to 6 The specific structure and function of the central optical module in the embodiment are Figure 2 and Figure 3 The specific structure and function of the central optical module in the embodiment are similar and will not be repeated here.

[0203] In the second specific implementation, the access side optical module may be a passive optical module, ie, does not include a laser. Optionally, in the second specific implementation, the access side optical module includes a PD, for example, the PD is connected to the second splitter for performing optical-to-electrical conversion on the received downlink optical signal.

[0204] In the case of a separate light source pool, see Figure 7 The light source pool can also be multiplexed to multiple central optical modules, that is, the light source pool is also used to provide multiple central optical modules with optical signals to be modulated at the downstream wavelength, that is, multiple central optical modules can be multiplexed. Figure 7 The light source pool can provide the modulated optical signal of the downlink wavelength to each central optical module through the optical splitter.

[0205] In some embodiments, the light source pool is used for multiplexing of multiple central optical modules, but not for multiplexing of multiple groups of access side optical modules, that is, the light source pool is used to provide optical signals for downlink, so that the central optical module can be passive. In other embodiments, the light source pool is used for multiple groups of access side optical modules, but not for multiplexing of multiple central optical modules, that is, the light source pool is used to provide optical signals for uplink, so that the access side optical module can be passive. In still other embodiments, the light source pool is used for multiplexing of multiple groups of access side optical modules and multiple central optical modules. That is, the light source pool is used to provide optical signals for both uplink and downlink, so that both the central optical module and the access side optical module can be passive.

[0206] Figure 8 and Figure 9 This is an architecture diagram of two optical networking systems provided in the embodiment of the present application. Figure 8 and Figure 9The specific process of transmitting downlink information and uplink information in the third specific implementation method is described below. The third specific implementation method mainly realizes the mixed insertion of access side optical modules by automatically matching uplink and downlink wavelengths of access side optical modules.

[0207] See also Figure 8 and Figure 9 , the transmission process of downlink information in the third specific implementation method is the same as Figure 2 and Figure 3 The transmission process of the downlink information in the first specific implementation shown is similar. That is, the intermediate device is used to transmit the optical signal of the downlink wavelength corresponding to the port to the access side optical module connected to the port through each port of the multiple ports. The first optical module among the multiple access side optical modules is used to receive the optical signal of the first downlink wavelength transmitted by the first port connected to the first optical module. The first optical module is any one of the multiple access side optical modules, and the first downlink wavelength is the downlink wavelength corresponding to the first port. The specific devices and structures for transmitting the optical signal of the downlink wavelength will refer to Figure 2 and Figure 3 The relevant introduction in the embodiments will not be repeated here.

[0208] In the third specific implementation, during the transmission of uplink information, the first optical module among the multiple access-side optical modules is further configured to determine, from the multiple uplink wavelengths, an uplink wavelength paired with the first downlink wavelength, obtain the first uplink wavelength, generate an optical signal of the first uplink wavelength, and transmit the optical signal of the first uplink wavelength to the first port. The multiple uplink wavelengths include uplink wavelengths corresponding to multiple ports of the intermediate device. The intermediate device is further configured to transmit the optical signal of the first uplink wavelength to the central optical module.

[0209] The first optical module includes a plurality of single-frequency lasers corresponding one-to-one to the plurality of uplink wavelengths, each of the plurality of single-frequency lasers being capable of generating an optical signal at the uplink wavelength corresponding to the single-frequency laser. Alternatively, the first optical module includes a tunable laser, the tunable laser being capable of generating an optical signal at any one of the plurality of uplink wavelengths.

[0210] like Figure 8 and Figure 9 As shown, the first optical module includes multiple LDs, each LD is used to generate an optical signal of an upstream wavelength, and the upstream wavelengths of optical signals generated by different LDs are different.

[0211] Optionally, the first optical module further includes a first combiner, wherein the laser in the first optical module is connected to the first combiner via an optical fiber, and the first combiner is connected to the first port via an optical fiber. The first combiner is capable of receiving an optical signal of any one of the multiple upstream wavelengths, performing multiplexing processing on the received optical signal of the upstream wavelength, and transmitting the received optical signal to the first port.

[0212] See also Figure 8 and Figure 9 The first combiner can be implemented by a MUX, or can also be implemented by other specific devices with similar functions, which is not limited in the embodiments of the present application.

[0213] Figure 10 and Figure 11 This is an architecture diagram of two optical networking systems provided in the embodiment of the present application. Figure 10 and Figure 11 The following describes the specific process of transmitting downlink and uplink information in the fourth specific implementation method. The fourth specific implementation method mainly uses intermediate equipment to perform optical cross-connection to achieve uplink and downlink matching, thereby enabling mixed insertion of access-side optical modules.

[0214] See also Figure 10 and Figure 11 , the transmission process of downlink information in the fourth specific implementation method is the same as Figure 2 and Figure 3 The transmission process of the downlink information in the first specific implementation shown is similar. That is, the intermediate device is used to transmit the optical signal of the downlink wavelength corresponding to the port to the access side optical module connected to the port through each port of the multiple ports. The first optical module among the multiple access side optical modules is used to receive the optical signal of the first downlink wavelength transmitted by the first port connected to the first optical module. The first optical module is any one of the multiple access side optical modules, and the first downlink wavelength is the downlink wavelength corresponding to the first port. The specific devices and structures for transmitting the optical signal of the downlink wavelength will refer to Figure 2 and Figure 3 The relevant introduction in the embodiments will not be repeated here.

[0215] In a fourth specific implementation, the intermediate device includes multiple ports, a first combiner and an optical cross-connect (OXC) module, each of the multiple access side optical modules is connected to any one of the multiple ports through an optical fiber, different access side optical modules are connected to different ports, the optical cross-connect module includes multiple first input ends and multiple first output ends, the first combiner includes a second output end and multiple second input ends, the multiple first input ends are connected to the multiple ports in a one-to-one correspondence, the multiple first output ends are connected to the multiple second input ends in a one-to-one correspondence, each second input end corresponds to an uplink wavelength, and different second input ends correspond to different uplink wavelengths.

[0216] Each of the multiple access side optical modules is used to generate an optical signal of any uplink wavelength and transmit the optical signal of the uplink wavelength to the port to which the access side optical module is connected. Different access side optical modules generate optical signals with different uplink wavelengths.

[0217] The optical cross-connect module is used to receive the multiple upstream wavelength optical signals transmitted by the multiple ports through the multiple first input ports, and perform optical cross-connection on the multiple upstream wavelength optical signals so that each of the multiple first output ports outputs an optical signal of a target wavelength, where the target wavelength is the upstream wavelength corresponding to the second input port to which the first output port is connected. The first combiner is used to receive the multiple upstream wavelength optical signals output by the multiple first output ports through the multiple second input ports, combine the multiple upstream wavelength optical signals into a first upstream optical signal, and transmit the first upstream optical signal to the central optical module through the second output port. In this way, even if multiple access-side optical modules are mixed, the upstream and downstream information can be matched through the optical cross-connect module, thereby ensuring the reliability of optical communication.

[0218] See also Figure 10 and Figure 11 The first combiner can be implemented by a MUX, or can also be implemented by other specific devices with similar functions, which is not limited in the embodiments of the present application.

[0219] The optical cross-connect module is powered by an external power supply of the intermediate device, that is, the intermediate device has an external power supply, which is used to supply power to the optical cross-connect module. Alternatively, the optical cross-connect module is powered by other means.

[0220] See also Figure 10 and Figure 11 The optical cross-connect module can obtain feedback from the central optical module. This feedback information indicates whether the central optical module has received optical signals at multiple upstream wavelengths, that is, whether the optical signals have been successfully transmitted to the central optical module after optical cross-connection. In this way, the central optical module can determine whether to adjust the optical cross-connect logic of the optical cross-connect module based on this feedback information to ensure successful transmission of upstream information.

[0221] Combination of the above Figures 2 to 11 This application describes four specific implementation methods provided by the embodiments. All four methods can achieve mixed insertion of access-side optical modules while ensuring optical communication reliability, improving the flexibility of optical networking and reducing the difficulty of equipment management and maintenance. These four specific implementation methods can be applied individually or in combination to achieve flexible networking in different scenarios.

[0222] The network architecture and business scenarios described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Ordinary technicians in this field will know that with the evolution of network architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0223] As can be seen from the above, in order to achieve mixed insertion of access-side optical modules, the embodiments of the present application provide at least four specific implementations of the optical networking system. The following will be divided into four embodiments to introduce the corresponding optical communication methods of these optical networking systems.

[0224] Figure 12 It is a flowchart of an optical communication method provided by an embodiment of the present application. This method embodiment corresponds to the first specific implementation of the above-mentioned optical networking system. The method is applied to an optical networking system, the optical networking system includes a plurality of access side optical modules, the optical networking system also includes an intermediate device, the intermediate device includes a plurality of ports, each of the plurality of access side optical modules is connected to any one of the plurality of ports through an optical fiber, and different access side optical modules are connected to different ports. Each port corresponds to a downlink wavelength, and different ports correspond to different downlink wavelengths. Each downlink wavelength is also matched with an uplink wavelength, and different downlink wavelengths match different uplink wavelengths. The plurality of access side optical modules are configured to generate optical signals of the same specified wavelength. Among them, the first optical module among the plurality of access side optical modules is connected to the first port among the plurality of ports. Please refer to Figure 12 , the method includes the following steps.

[0225] Step 1201: The first optical module generates an optical signal of a specified wavelength.

[0226] The first optical module is inserted into the access device, or the first optical module is integrated into the access device, and the access device is used to access the optical networking system through the first optical module.

[0227] In an embodiment of the present application, the optical signals generated by multiple access-side optical modules in the optical networking system have the same designated wavelength.

[0228] Taking the first optical module as an example, the first optical module includes a second laser, and the second laser generates an optical signal of a specified wavelength. The embodiment of the present application does not limit the structure and type of the second laser.

[0229] Step 1202: The first optical module transmits the optical signal of the specified wavelength to the first port of the intermediate device.

[0230] The first optical module is connected to the first port via an optical fiber, for example, an optical cable is connected between the first optical module and the first port, and the optical cable is wrapped with an optical fiber. The first optical module transmits the optical signal of the specified wavelength to the first port via the optical fiber.

[0231] Step 1203: The intermediate device receives, through each of the multiple ports, an optical signal of a specified wavelength generated and transmitted by the access-side optical module connected to the port.

[0232] That is, each port of the intermediate device can receive an optical signal of a specified wavelength transmitted by the access-side optical module connected to the port.

[0233] Step 1204: The intermediate device generates an optical signal of an upstream wavelength that matches the downstream wavelength corresponding to the port based on the optical signal of the specified wavelength received by each port of the multiple ports.

[0234] That is, the intermediate device can match the upstream and downstream wavelengths.

[0235] The intermediate device includes at least one first laser, and the intermediate device generates the optical signal of the above-mentioned uplink wavelength through the at least one first laser.

[0236] Optionally, the intermediate device has an external power supply, which supplies power to any one of the at least one first laser; or, an optoelectronic composite cable is connected between the access side optical module and the port of the intermediate device, and the access side optical module supplies power to any one of the first lasers through the optoelectronic composite cable; or, a cable is connected between the access side optical module and the port, and the access side optical module supplies power to any one of the first lasers through the cable.

[0237] In one implementation, each of the multiple ports is connected to a first laser, and each of the multiple access-side optical modules is connected to the port via an optoelectronic composite cable. Each access-side optical module supplies power to the first laser connected to the access-side optical module via the optoelectronic composite cable connected to the access-side optical module. That is, each first laser is powered by the optoelectronic composite cable connected to the port connected to the first laser. In this way, if one access-side optical module loses power or fails, or if the access device where the access-side optical module is located fails, communication between other access-side optical modules and the intermediate optical module will not be affected.

[0238] For example, a first optical module is connected to a first port via an optical fiber composite cable, which is in turn connected to a first laser in an intermediate device via an optical fiber. The optical fiber composite cable is used to transmit optical signals of a specified wavelength and to supply power to the first laser. In other words, the first optical module supplies power to the first laser connected to the first port via the optical fiber composite cable. Therefore, if the first optical module loses power or fails, communication between other access-side optical modules and the intermediate optical module will not be affected.

[0239] Step 1205: The intermediate device transmits the optical signal of the upstream wavelength to the central optical module.

[0240] Accordingly, the central optical module receives an optical signal of an upstream wavelength transmitted by the intermediate device and processes the received optical signal. In one implementation, the intermediate device combines optical signals of multiple upstream wavelengths into a first upstream optical signal. The first upstream optical signal is a composite optical signal having the multiple upstream wavelengths, where the multiple upstream wavelengths include optical signals of an upstream wavelength corresponding to at least one port. The at least one port includes a port in the intermediate device that is currently receiving an optical signal transmitted by an access-side optical module. For example, if all access-side optical modules in the optical networking system are currently transmitting optical signals, the at least one port includes all ports in the intermediate device.

[0241] The intermediate device sends a first uplink optical signal to the central optical module, and the central optical module receives a second uplink optical signal and decomposes the second uplink optical signal into optical signals of the aforementioned multiple uplink wavelengths. The second uplink optical signal is the optical signal of the first uplink optical signal after being transmitted through the optical fiber between the intermediate device and the central optical module.

[0242] In some embodiments, the intermediate device may combine the optical signals of the multiple upstream wavelengths into a first upstream optical signal through a combiner, and the central optical module may decompose the second upstream optical signal through a demultiplexer.

[0243] It should be noted that the process of transmitting uplink information and downlink information in the embodiment of the present application can occur simultaneously. Since the transmission medium of uplink information and downlink information is optical signal, the speed of light is very fast, so all the above steps will be completed almost instantly, and the efficiency of optical communication is very high.

[0244] In summary, in the embodiments of the present application, in order to achieve the intermixing of optical modules without affecting optical communication, improve the networking flexibility of optical communication, and reduce the difficulty of equipment management and maintenance, multiple access-side optical modules all send optical signals of the same specified wavelength to the intermediate device. The intermediate device then generates an optical signal of the upstream wavelength corresponding to each port based on the optical signal received by that port, and transmits the generated optical signal of the upstream wavelength to the central optical module. In this way, even if multiple access-side optical modules are intermixed, the intermediate device can still match the upstream and downstream wavelengths, thereby ensuring the reliability of optical communication.

[0245] Figure 13 It is a flowchart of another optical communication method provided by an embodiment of the present application. The method corresponds to the second specific implementation of the optical networking system. That is, the method is applied to the optical networking system, the optical networking system includes multiple access side optical modules and intermediate devices, the intermediate device includes multiple ports, each access side optical module of the multiple access side optical modules is connected to any one of the multiple ports through an optical fiber, wherein the first optical module is connected to the first port of the multiple ports. The first port is any one of the multiple ports, and the first optical module is the access side optical module connected to the first port among the multiple access side optical modules. Each port corresponds to a pair of wavelengths, each pair of wavelengths includes an upstream wavelength and a downstream wavelength, and different ports correspond to different upstream wavelengths and corresponding downstream wavelengths are also different. The method includes the following steps.

[0246] Step 1301: The intermediate device obtains a target optical signal of a first downstream wavelength and an optical signal to be modulated of a first upstream wavelength, where the first downstream wavelength and the first upstream wavelength are a pair of wavelengths corresponding to a first port.

[0247] The optical networking system further includes a central optical module, which is connected to the intermediate device via an optical fiber. The target optical signal of the first downstream wavelength originates from the central optical module. That is, the central optical module transmits the target optical signal of the first downstream wavelength to the intermediate device.

[0248] In one implementation, the central optical module combines target optical signals of multiple downstream wavelengths into a third downstream optical signal, and transmits the third downstream optical signal to the intermediate device. The third downstream optical signal has the multiple downstream wavelengths. The multiple downstream wavelengths include at least the first downstream wavelength corresponding to the first port. The intermediate device receives the fourth downstream optical signal and decomposes the fourth downstream optical signal into the target optical signals of the multiple downstream wavelengths.

[0249] The fourth downlink optical signal is an optical signal obtained by transmitting the third downlink optical signal through the optical fiber between the central optical module and the intermediate device.

[0250] For example, see Figures 4 to 7 The central optical module combines the multiple downstream wavelength target optical signals into a first downstream optical signal through a combiner. The intermediate device decomposes the second downstream optical signal into the multiple downstream wavelength target optical signals through a demultiplexer.

[0251] The optical signal to be modulated at the first upstream wavelength is derived from a light source pool. In some embodiments, the optical networking system further comprises a light source pool, which is connected to the intermediate device via an optical fiber. The light source pool is configured to generate the optical signals to be modulated at the multiple upstream wavelengths, including the first upstream wavelength. The light source pool transmits the optical signals to be modulated at the multiple upstream wavelengths to the intermediate device, and the intermediate device receives the optical signal to be modulated at the first upstream wavelength transmitted by the light source pool.

[0252] For example, see Figures 4 to 7 The light source pool (via the MUX) combines the multiple upstream wavelength optical signals to be modulated into a first optical signal to be modulated and transmits the first optical signal to the intermediate device. The intermediate device receives the second optical signal to be modulated and decomposes it (via the DEMUX) into the multiple upstream wavelength optical signals to be modulated. The second optical signal to be modulated is the result of the first optical signal being transmitted via the optical fiber between the light source pool and the intermediate device.

[0253] In other embodiments, the light source pool is located in an intermediate device or in a central light module.

[0254] Since the downlink information may not be available all the time, the step of the intermediate device acquiring the target optical signal of the first downlink wavelength and the step of acquiring the optical signal to be modulated of the first uplink wavelength may occur simultaneously or may not occur simultaneously.

[0255] Step 1302: The intermediate device transmits a target optical signal of a first downstream wavelength and an optical signal to be modulated of a first upstream wavelength to a first optical module through a first port.

[0256] For example, see Figures 4 to 7 The intermediate device combines the target optical signal of the first downstream wavelength and the optical signal to be modulated of the first upstream wavelength through a combiner to obtain a first downstream optical signal, and transmits the first downstream optical signal to the first optical module through the first port.

[0257] Step 1303: The first optical module obtains a target optical signal of a first downstream wavelength and an optical signal to be modulated of a first upstream wavelength transmitted by the first port.

[0258] Exemplarily, the first optical module receives the second downlink optical signal and decomposes the second downlink optical signal into a target optical signal at the first downlink wavelength and an optical signal to be modulated at the first uplink wavelength. The second downlink optical signal is the first downlink optical signal after being transmitted through the optical fiber between the first port and the first optical module.

[0259] See also Figures 4 to 7 The first optical module decomposes the second downlink optical signal into a target optical signal of the first downlink wavelength and an optical signal to be modulated of the first uplink wavelength through DEMUX.

[0260] Step 1304: The first optical module modulates the optical signal to be modulated at the first upstream wavelength to obtain a target optical signal at the first upstream wavelength.

[0261] In some embodiments, the first optical module is modulated by a modulator (such as Figures 4 to 7 The EAM shown modulates the optical signal to be modulated at the first upstream wavelength to obtain the target optical signal at the first upstream wavelength. The target optical signal at the first upstream wavelength carries the upstream information.

[0262] Step 1305: The first optical module transmits a target optical signal of the first upstream wavelength to the first port.

[0263] Step 1306: The intermediate device receives, through the first port, a target optical signal of the first upstream wavelength transmitted by the first optical module.

[0264] Step 1307: The intermediate device transmits a target optical signal of the first upstream wavelength to the central optical module.

[0265] For example, see Figures 4 to 7 The intermediate device (via a MUX) combines multiple upstream wavelength target optical signals into a first upstream optical signal, which is then transmitted to the central optical module. The multiple upstream wavelengths include the upstream wavelength corresponding to at least one port. The central optical module receives the second upstream optical signal and (via a DEMUX) decomposes the second upstream optical signal into the multiple upstream wavelength target optical signals. The second upstream optical signal is the result of the first upstream optical signal being transmitted via the optical fiber between the intermediate device and the central optical module.

[0266] To sum up, in the embodiment of the present application, a modulated optical signal of a certain upstream wavelength is injected into the access side optical module. Even if the multiple access side optical modules are mixed, each access side optical module can transmit the target optical signal of the upstream wavelength corresponding to the port to the connected port, so that the upstream and downstream wavelengths are matched, and both upstream and downstream information can be successfully transmitted, thereby ensuring the reliability of optical communication.

[0267] Figure 14 It is a flowchart of another optical communication method provided by an embodiment of the present application. The method corresponds to the third specific implementation method of the optical networking system. That is, the method is applied to the optical networking system, which includes a central optical module, an intermediate device and multiple access side optical modules, the central optical module and the intermediate device are connected through optical fiber, the intermediate device includes multiple ports, each of the multiple access side optical modules is connected to any one of the multiple ports through optical fiber, different access side optical modules are connected to different ports, each port corresponds to a pair of wavelengths, each pair of wavelengths includes an upstream wavelength and a downstream wavelength, different ports correspond to different upstream wavelengths and corresponding downstream wavelengths are also different. The method includes the following steps.

[0268] Step 1401: The intermediate device transmits an optical signal of a downstream wavelength corresponding to each port to the access-side optical module connected to the port through each port among the multiple ports.

[0269] The optical signal of the downstream wavelength originates from the central optical module, that is, the central optical module transmits the optical signal of the downstream wavelength to the intermediate device, and the intermediate device obtains the optical signal of the downstream wavelength.

[0270] In some embodiments, the central optical module combines optical signals at multiple downstream wavelengths into a first downstream optical signal, and transmits the first downstream optical signal to an intermediate device. The first downstream optical signal has the multiple downstream wavelengths. The intermediate device receives a second downstream optical signal, which is the optical signal of the first downstream optical signal after transmission via the optical fiber between the central optical module and the intermediate device. The intermediate device decomposes the second downstream optical signal into optical signals at the multiple downstream wavelengths. The multiple downstream wavelengths include the downstream wavelength corresponding to at least one port of the intermediate device.

[0271] Exemplarily, the central optical module includes a combiner, which is connected to multiple optoelectronic conversion submodules via optical fibers. The optoelectronic conversion submodule transmits optical signals of the downstream wavelengths corresponding to the optoelectronic conversion submodule to the combiner. After receiving the optical signals of the multiple downstream wavelengths transmitted by the multiple optoelectronic conversion submodules, the combiner combines the optical signals of the multiple downstream wavelengths into a first downstream optical signal. The first downstream optical signal is a composite optical signal having multiple downstream wavelengths. The first downstream optical signal carries downstream information transmitted to the multiple access-side optical modules.

[0272] In addition to combining the optical signals of the multiple downstream wavelengths through a combiner, the central optical module can also perform this operation through other devices with similar functions, which is not limited in the embodiments of the present application.

[0273] For example, see Figure 8 and Figure 9 The central optical module transmits the first downstream optical signal to the optical splitter in the intermediate device via the optical splitter connected to the combiner. Accordingly, the intermediate device receives the second downstream optical signal via the optical splitter. Alternatively, the central optical module directly transmits the first downstream optical signal to the intermediate device via the first combiner, and the intermediate device receives the second downstream optical signal via the first splitter.

[0274] The intermediate device includes a first wave splitter that splits the second downstream optical signal into optical signals of the plurality of downstream wavelengths. The first wave splitter is connected to a plurality of ports of the intermediate device, and the first wave splitter transmits an optical signal of the downstream wavelength corresponding to each port to each of the plurality of ports, thereby transmitting the optical signal of the downstream wavelength corresponding to each port to the access-side optical module connected to the port through each port.

[0275] Step 1402: A first optical module receives an optical signal of a first downstream wavelength transmitted by a first port to which the first optical module is connected, where the first optical module is any one of a plurality of access-side optical modules, and the first downstream wavelength is a downstream wavelength corresponding to the first port.

[0276] Optionally, the first optical module includes a PD, and the first optical module performs photoelectric conversion on a received optical signal of the first downlink wavelength through the PD to obtain an electrical signal carrying downlink information.

[0277] Step 1403: The first optical module determines an upstream wavelength paired with the first downstream wavelength from a plurality of upstream wavelengths to obtain the first upstream wavelength, where the plurality of upstream wavelengths include upstream wavelengths corresponding to a plurality of ports of the intermediate device.

[0278] Specifically, to ensure successful transmission of both uplink and downlink optical signals when optical modules are intermixed on the access side, the access side optical modules perform uplink and downlink matching. For example, if the first optical module receives an optical signal at the first downlink wavelength, it determines the uplink wavelength corresponding to the first downlink wavelength from among multiple uplink wavelengths to obtain the first uplink wavelength. This matching of uplink and downlink wavelengths ensures reliable transmission of uplink and downlink optical signals.

[0279] Step 1404: The first optical module generates an optical signal of a first upstream wavelength.

[0280] In one implementation, the first optical module includes multiple single-frequency lasers corresponding one-to-one to the multiple upstream wavelengths, each of the multiple single-frequency lasers being capable of generating an optical signal having the upstream wavelength corresponding to the single-frequency laser. Upon determining the first upstream wavelength, the first optical module generates the optical signal having the first upstream wavelength using the single-frequency laser corresponding to the first upstream wavelength.

[0281] In another implementation, the first optical module includes a tunable laser capable of generating an optical signal of any one of the multiple upstream wavelengths. Upon determining the first upstream wavelength, the first optical module generates the optical signal of the first upstream wavelength through the tunable laser.

[0282] Step 1405: The first optical module transmits an optical signal of a first upstream wavelength to the first port.

[0283] In some embodiments, for example, in an embodiment in which the first optical module includes multiple single-frequency lasers, the first optical module also includes a first combiner, the laser in the first optical module is connected to the first combiner via an optical fiber, and the first combiner is connected to the first port via an optical fiber. The first combiner is capable of receiving an optical signal of any one of the multiple upstream wavelengths, and performing multiplexing processing on the received optical signal of the upstream wavelength before transmitting it to the first port. Then, upon receiving the optical signal of the first upstream wavelength, the first combiner transmits the optical signal of the first upstream wavelength to the first port by multiplexing. Here, the signals before and after multiplexing have the same upstream wavelength, and to a certain extent, the optical signals before and after multiplexing can be considered to be the same.

[0284] In other embodiments, for example, in an embodiment where the first optical module includes a tunable laser, the tunable laser is connected to the first port via an optical fiber, and the tunable laser transmits an optical signal of the first uplink wavelength to the first port.

[0285] The above text uses the first optical module as an example to exemplarily introduce the embodiments of the present application. Other modules in the multiple access side optical modules except the first optical module can also achieve functions similar to those of the first optical module, and the embodiments of the present application will not repeat this.

[0286] Step 1406: The intermediate device receives an optical signal of the first upstream wavelength through the first port.

[0287] Step 1407: The intermediate device transmits an optical signal of the first upstream wavelength to the central optical module.

[0288] Optionally, the intermediate device combines optical signals of multiple upstream wavelengths received at multiple ports into a first upstream optical signal, and transmits the first upstream optical signal to the central optical module. The multiple upstream wavelengths include the first upstream wavelength. The central optical module receives a second upstream optical signal and decomposes the second upstream optical signal into optical signals of the multiple upstream wavelengths. The second upstream optical signal is the result of transmission of the first upstream optical signal via the optical fiber between the intermediate device and the central optical module.

[0289] For example, the intermediate device combines the multiple upstream wavelength optical signals into a first upstream optical signal through a combiner, and the central optical module decomposes the second upstream wavelength optical signal into the multiple upstream wavelength optical signals through a demultiplexer.

[0290] Alternatively, see Figure 8 , the intermediate device and the central optical module are connected through a splitter. Then, the intermediate device transmits the first uplink optical signal to the central optical module through the splitter connected to the combiner, and the central optical module receives the second uplink optical signal through the splitter. Alternatively, see Figure 9The combiner in the intermediate device is connected to the wavelength splitter in the central optical module through an optical fiber. Then, the combiner in the intermediate device transmits the first uplink optical signal to the wavelength splitter in the central optical module.

[0291] To summarize, to ensure successful transmission of both upstream and downstream optical signals when intermixing optical modules on the access side, the access side optical modules perform uplink and downstream matching. For example, if the first optical module receives an optical signal at the first downstream wavelength, it determines the upstream wavelength corresponding to the first downstream wavelength from among multiple upstream wavelengths to obtain the first upstream wavelength. This matching of the upstream and downstream wavelengths ensures the transmission reliability of the uplink and downstream optical signals.

[0292] Figure 15 It is a flowchart of another optical communication method provided by an embodiment of the present application. The method corresponds to the fourth specific implementation method of the optical networking system. That is, the method is applied to the optical networking system, which includes a central optical module, an intermediate device and multiple access side optical modules, the central optical module is connected to the intermediate device through an optical fiber, the intermediate device includes multiple ports, a first combiner and an optical cross module, each of the multiple access side optical modules is connected to any one of the multiple ports through an optical fiber, different access side optical modules are connected to different ports, the optical cross module includes multiple first input terminals and multiple first output terminals, the first combiner includes a second output terminal and multiple second input terminals, the multiple first input terminals are connected one-to-one with the multiple ports, the multiple first output terminals are connected one-to-one with the multiple second input terminals, each second input terminal corresponds to an uplink wavelength, and different second input terminals correspond to different uplink wavelengths. The method includes the following steps.

[0293] Step 1501: Each access side optical module among multiple access side optical modules generates an optical signal of any uplink wavelength and transmits the optical signal of the uplink wavelength to the port to which the access side optical module is connected. The uplink wavelengths of the optical signals generated by different access side optical modules are different.

[0294] For example, see Figure 10 and Figure 11 Taking the access side optical module 1 as an example, the access side optical module 1 includes an LD, which can generate an optical signal of any upstream wavelength and transmit the generated optical signal of the upstream wavelength to the port to which the LD is connected.

[0295] For example, access side optical module 1, access side optical module 2, and access side optical module 3 generate optical signals with wavelengths of λ2, λ3, and λ1, respectively. For another example, access side optical module 1, access side optical module 2, and access side optical module 3 generate optical signals with wavelengths of λ2, λ1, and λ3, respectively.

[0296] Step 1502: The optical cross-connect module in the intermediate device receives optical signals of multiple upstream wavelengths transmitted by multiple ports of the intermediate device through multiple first input ports.

[0297] Each of the multiple ports of the intermediate device receives an optical signal of an upstream wavelength transmitted by the access-side optical module connected to the port, and transmits the optical signal of the upstream wavelength to the first input port (an input port of the optical cross-connect module) to which the port is connected. In this way, the optical cross-connect module receives optical signals of multiple upstream wavelengths transmitted by the multiple ports of the intermediate device through the multiple first input ports. The wavelengths of the optical signals received by these multiple first input ports may be disordered.

[0298] Step 1503: The optical cross-connect module performs optical cross-connection on the multiple uplink wavelength optical signals so that each of the multiple first output ports outputs an optical signal of a target wavelength, where the target wavelength is the uplink wavelength corresponding to the second input port connected to the first output port.

[0299] In the embodiment of the present application, uplink and downlink matching is achieved through the optical cross module, ensuring that the uplink optical signal can also be successfully transmitted to the central optical module when the access side optical modules are mixed.

[0300] For the specific structure and function of the optical cross-connect module, please refer to the relevant technologies, which will not be introduced in detail in this article.

[0301] Step 1504: The first combiner in the intermediate device receives multiple upstream wavelength optical signals output by multiple first output ends through multiple second input ends, combines the multiple upstream wavelength optical signals into a first upstream optical signal, and transmits the first upstream optical signal to the central optical module through the second output end.

[0302] To ensure the reliability of the optical cross-connect module, the module can optionally receive feedback from the central optical module. This feedback indicates whether the central optical module has received optical signals at multiple upstream wavelengths, that is, whether the optical signals have been successfully transmitted to the central optical module after optical cross-connection. Based on this feedback, the central optical module can determine whether to adjust the optical cross-connect logic of the module to ensure successful transmission of upstream information.

[0303] The above steps 1501 to 1504 introduce Figure 15 The transmission process of uplink information in the embodiment shown. Figure 15 The transmission process of downlink information in the embodiment shown is similar to Figure 14 The transmission process of downlink information in the illustrated embodiments is the same and will not be repeated here.

[0304] To sum up, the embodiment of the present application realizes uplink and downlink matching through the optical cross module in the intermediate device, ensuring that when the access side optical modules are mixed, the uplink optical signal generated by the access side optical module can also be successfully transmitted to the central optical module through the intermediate device.

[0305] The embodiment of the present application also provides an access side light module, which can be implemented by software, hardware or a combination of both. The access side light module can be Figures 1 to 15 Any access side optical module in the embodiment.

[0306] That is, a first optical module is provided, the first optical module being any one of a plurality of access-side optical modules included in an optical networking system, the optical networking system further comprising an intermediate device, the intermediate device comprising a plurality of ports, each of the plurality of access-side optical modules being connected to any one of the plurality of ports via an optical fiber, different access-side optical modules being connected to different ports, wherein the first optical module is connected to a first port of the plurality of ports; each port corresponding to a downlink wavelength, different ports corresponding to different downlink wavelengths, each downlink wavelength also being matched with an uplink wavelength, different downlink wavelengths being matched with different uplink wavelengths, the plurality of access-side optical modules being configured to generate optical signals of the same specified wavelength; the first optical module comprising:

[0307] An optical signal generating module, used to generate an optical signal of a specified wavelength;

[0308] The optical signal transmission module is used to transmit an optical signal of a specified wavelength to the first port. The optical signal of the specified wavelength is used by the intermediate device to generate an optical signal of a first upstream wavelength. The first upstream wavelength is an upstream wavelength that matches the downstream wavelength corresponding to the first port.

[0309] In an embodiment of the present application, multiple access-side optical modules all transmit optical signals of the same specified wavelength to an intermediate device. The intermediate device then generates an optical signal of the upstream wavelength corresponding to each port based on the optical signal received by that port, and transmits the generated optical signal of the upstream wavelength to the central optical module. This allows the intermediate device to match the upstream and downstream wavelengths even when multiple access-side optical modules are intermixed, thereby ensuring the reliability of optical communications. The intermixing of optical modules improves networking flexibility and reduces the difficulty of device management and maintenance.

[0310] It should be noted that: the access side optical module provided in the above embodiment is only illustrated by the division of the above functional modules when performing optical communication. In actual application, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the access side optical module provided in the above embodiment is Figures 1 to 3 System embodiments and Figure 12 The method embodiments belong to the same concept, and their specific implementation processes are detailed in the above-mentioned system embodiments and method embodiments, which will not be repeated here.

[0311] The embodiment of the present application also provides an intermediate device, which can be implemented by software, hardware or a combination of both. Figures 1 to 15 Any intermediate device in an embodiment.

[0312] That is, an embodiment of the present application provides an intermediate device, which is included in an optical networking system. The optical networking system also includes a central optical module and multiple access side optical modules. The central optical module is connected to the intermediate device via an optical fiber. The intermediate device includes multiple ports. Each access side optical module in the multiple access side optical modules is connected to any one of the multiple ports via an optical fiber. Different access side optical modules are connected to different ports. Each port corresponds to a downstream wavelength. Different ports correspond to different downstream wavelengths. Each downstream wavelength is also matched with an upstream wavelength. Different downstream wavelengths match different upstream wavelengths. The intermediate device includes:

[0313] a receiving module, configured to receive, through each of the multiple ports, an optical signal of a specified wavelength generated and transmitted by an access-side optical module connected to the port, wherein the optical signals generated by the multiple access-side optical modules have the same specified wavelength;

[0314] an optical signal generating module, configured to generate an optical signal of an upstream wavelength matching a downstream wavelength corresponding to the port based on an optical signal of a specified wavelength received by each of the multiple ports;

[0315] The optical signal transmission module is used to transmit optical signals of the upstream wavelength to the central optical module.

[0316] In an embodiment of the present application, multiple access-side optical modules all transmit optical signals of the same specified wavelength to an intermediate device. The intermediate device then generates an optical signal of the upstream wavelength corresponding to each port based on the optical signal received by that port, and transmits the generated optical signal of the upstream wavelength to the central optical module. This allows the intermediate device to match the upstream and downstream wavelengths even when multiple access-side optical modules are intermixed, thereby ensuring the reliability of optical communications. The intermixing of optical modules improves networking flexibility and reduces the difficulty of device management and maintenance.

[0317] It should be noted that: the access side optical module provided in the above embodiment is only illustrated by the division of the above functional modules when performing optical communication. In actual application, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the intermediate device provided in the above embodiment and Figures 1 to 3 System embodiments and Figure 12 The method embodiments belong to the same concept, and their specific implementation processes are detailed in the above-mentioned system embodiments and method embodiments, which will not be repeated here.

[0318] The embodiment of the present application also provides an access side light module, which can be implemented by software, hardware or a combination of both. The access side light module can be Figures 1 to 15 Any access side optical module in the embodiment.

[0319] That is, an embodiment of the present application provides a first optical module, which is any one of a plurality of access side optical modules included in an optical networking system. The optical networking system further includes an intermediate device, which includes a plurality of ports. Each of the plurality of access side optical modules is connected to any one of the plurality of ports via an optical fiber, wherein the first optical module is connected to a first port of the plurality of ports, each port corresponds to a pair of wavelengths, each pair of wavelengths includes an upstream wavelength and a downstream wavelength, and different ports correspond to different upstream wavelengths and different downstream wavelengths. The first optical module includes:

[0320] an acquisition module, configured to acquire a target optical signal of a first downstream wavelength and an optical signal to be modulated of a first upstream wavelength transmitted by the first port, where the first downstream wavelength and the first upstream wavelength are a pair of wavelengths corresponding to the first port;

[0321] a modulation module, configured to modulate the optical signal to be modulated at the first upstream wavelength to obtain a target optical signal at the first upstream wavelength;

[0322] The optical signal transmission module is used to transmit a target optical signal of a first upstream wavelength to the first port.

[0323] In an embodiment of the present application, an optical signal to be modulated of a certain upstream wavelength is injected into the access side optical module. Even if multiple access side optical modules are mixed, each access side optical module can transmit a target optical signal of the upstream wavelength corresponding to the port to which it is connected, thereby matching the upstream and downstream wavelengths, and both upstream and downstream information can be successfully transmitted, ensuring the reliability of optical communication, while also reducing the flexibility of optical networking and the difficulty of equipment maintenance and management.

[0324] It should be noted that: the access side optical module provided in the above embodiment is only illustrated by the division of the above functional modules when performing optical communication. In actual application, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the intermediate device provided in the above embodiment and Figures 4 to 7 System embodiments and Figure 13The method embodiments belong to the same concept, and their specific implementation processes are detailed in the above-mentioned system embodiments and method embodiments, which will not be repeated here.

[0325] The embodiment of the present application also provides an intermediate device, which can be implemented by software, hardware or a combination of both. Figures 1 to 15 Any intermediate device in an embodiment.

[0326] That is, an embodiment of the present application further provides an intermediate device, which is included in an optical networking system, the intermediate device includes multiple ports, the optical networking system also includes a central optical module and multiple access side optical modules, the central optical module is connected to the intermediate device via an optical fiber, each of the multiple access side optical modules is connected to any one of the multiple ports via an optical fiber, different access side optical modules are connected to different ports, each port corresponds to a pair of wavelengths, a pair of wavelengths includes an upstream wavelength and a downstream wavelength, different ports correspond to different upstream wavelengths and corresponding downstream wavelengths are also different; the intermediate device includes:

[0327] an acquisition module, configured to acquire a target optical signal of a first downstream wavelength and an optical signal to be modulated of a first upstream wavelength, wherein the first downstream wavelength and the first upstream wavelength are a pair of wavelengths corresponding to a first port, and the first port is any one of the multiple ports;

[0328] an optical signal transmission module, configured to transmit a target optical signal of a first downstream wavelength and an optical signal to be modulated of a first upstream wavelength to a first optical module through a first port, wherein the optical signal to be modulated of the first upstream wavelength is used by the first optical module to obtain a target optical signal of the first upstream wavelength through modulation, and the first optical module is an access-side optical module connected to the first port among the multiple access-side optical modules;

[0329] A receiving module, configured to receive, through the first port, a target optical signal of a first upstream wavelength transmitted by the first optical module;

[0330] The optical signal transmission module is used to transmit a target optical signal of a first upstream wavelength to the central optical module.

[0331] In an embodiment of the present application, an optical signal to be modulated of a certain upstream wavelength is injected into the access side optical module through an intermediate device. Even if the multiple access side optical modules are mixed, each access side optical module can transmit the target optical signal of the upstream wavelength corresponding to the port to the connected port, so that the upstream and downstream wavelengths are matched, and both upstream and downstream information can be successfully transmitted, ensuring the reliability of optical communication, while also reducing the flexibility of optical networking and the difficulty of equipment maintenance and management.

[0332] It should be noted that: the intermediate device provided in the above embodiment is only illustrated by the division of the above functional modules when performing optical communication. In actual application, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the intermediate device provided in the above embodiment is Figures 4 to 7 System embodiments and Figure 13 The method embodiments belong to the same concept, and their specific implementation processes are detailed in the above-mentioned system embodiments and method embodiments, which will not be repeated here.

[0333] The embodiment of the present application also provides an access side optical module, which can be implemented by software, hardware or a combination of both. Figures 1 to 15 Any access side optical module in the embodiment.

[0334] That is, an embodiment of the present application further provides a first optical module, the first optical module is any one of a plurality of access side optical modules included in the optical networking system, the optical networking system further includes an intermediate device, the intermediate device includes a plurality of ports, each of the plurality of access side optical modules is connected to any one of the plurality of ports, wherein the first optical module is connected to a first port of the plurality of ports, each port corresponds to a pair of wavelengths, each pair of wavelengths includes an upstream wavelength and a downstream wavelength, different ports correspond to different upstream wavelengths and corresponding downstream wavelengths are also different; the first optical module includes:

[0335] A receiving module, configured to receive an optical signal of a first downstream wavelength transmitted by the first port, where the first downstream wavelength is a downstream wavelength corresponding to the first port;

[0336] a determining module, configured to determine an uplink wavelength paired with the first downlink wavelength from a plurality of uplink wavelengths to obtain the first uplink wavelength, wherein the plurality of uplink wavelengths include the uplink wavelengths corresponding to the plurality of ports;

[0337] An optical signal generating module, configured to generate an optical signal of a first upstream wavelength;

[0338] The optical signal transmission module is used to transmit an optical signal of a first upstream wavelength to the first port.

[0339] Specifically, to ensure successful transmission of both upstream and downstream optical signals by intermixing optical modules on the access side, the access-side optical modules perform uplink and downstream matching. For example, if the first optical module receives an optical signal at the first downstream wavelength, it determines the upstream wavelength corresponding to the first downstream wavelength from among multiple upstream wavelengths to obtain the first upstream wavelength. This matching of upstream and downstream wavelengths ensures the transmission reliability of both upstream and downstream optical signals. This solution improves the reliability of optical communications while also reducing the flexibility of optical networking and the difficulty of equipment maintenance and management.

[0340] It should be noted that: the access side optical module provided in the above embodiment is only illustrated by the division of the above functional modules when performing optical communication. In actual application, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the access side optical module provided in the above embodiment is Figures 8 and 9 System embodiments and Figure 14 The method embodiments belong to the same concept, and their specific implementation processes are detailed in the above-mentioned system embodiments and method embodiments, which will not be repeated here.

[0341] The embodiment of the present application also provides an intermediate device, which can be implemented by software, hardware or a combination of both. Figures 1 to 15 Any intermediate device in an embodiment.

[0342] That is, an embodiment of the present application further provides an intermediate device, which is included in an optical networking system, the optical networking system also including a central optical module and multiple access side optical modules, the intermediate device including multiple ports, a first combiner and an optical cross module, each of the multiple access side optical modules is connected to any one of the multiple ports through an optical fiber, different access side optical modules are connected to different ports, the optical cross module includes multiple first input ports and multiple first output ports, the first combiner includes an output port and multiple second input ports, the multiple first input ports are connected to the multiple ports in a one-to-one correspondence, the multiple first output ports are connected to the multiple second input ports in a one-to-one correspondence, each second input port corresponds to an uplink wavelength, and different second input ports correspond to different uplink wavelengths;

[0343] an optical cross-connect module, configured to receive, through the multiple first input ports, optical signals of multiple upstream wavelengths transmitted by the multiple ports, the optical signals of the upstream wavelengths being generated by access-side optical modules, different access-side optical modules generating optical signals of different upstream wavelengths, and each access-side optical module being configured to generate an optical signal of any one upstream wavelength;

[0344] The optical cross-connect module is further configured to perform optical cross-connection on the optical signals of the multiple upstream wavelengths so that each of the multiple first output ends outputs an optical signal of a target wavelength, where the target wavelength is an upstream wavelength corresponding to the second input end to which the first output end is connected;

[0345] The first combiner is configured to receive the optical signals of multiple upstream wavelengths outputted by the multiple first output ends through the multiple second input ends, combine the optical signals of the multiple upstream wavelengths into a first upstream optical signal, and transmit the first upstream optical signal to the central optical module through the second output end.

[0346] Specifically, the optical cross-connect module within the intermediate device achieves uplink and downlink matching, ensuring that even when intermixing optical modules on the access side, the uplink optical signals generated by the access side modules can be successfully transmitted to the central optical module through the intermediate device. This improves the reliability of optical communications, reduces the flexibility of optical networking, and reduces the difficulty of equipment maintenance and management.

[0347] It should be noted that: the intermediate device provided in the above embodiment is only illustrated by the division of the above functional modules when performing optical communication. In actual application, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the intermediate device provided in the above embodiment is Figures 10 and 11 System embodiments and Figure 15 The method embodiments belong to the same concept, and their specific implementation processes are detailed in the above-mentioned system embodiments and method embodiments, which will not be repeated here.

[0348] Figure 16 16 is a schematic diagram of the structure of a communication device provided in an embodiment of the present application. The communication device may be an access device, a routing switching device, or an intermediate device in any of the above embodiments. The communication device 1600 may be a switch, a router, or other communication device that forwards messages. In this embodiment, the communication device 1600 includes: a main control board 1610, an interface board 1630, and an interface board 1640. In the case of multiple interface boards, a switching network board (not shown in the figure) may be included, which is used to complete data exchange between each interface board (interface board is also called line card or service board).

[0349] The main control board 1610 is used to perform functions such as system management, equipment maintenance, and protocol processing. Interface boards 1630 and 1640 are used to provide various service interfaces (e.g., POS interface, GE interface, ATM interface, etc.) and implement data flow forwarding. The main control board 1610 mainly contains three types of functional units: the system management and control unit, the system clock unit, and the system maintenance unit. The main control board 1610, interface board 1630, and interface board 1640 are connected to the system backplane via the system bus to achieve intercommunication. The interface board 1630 includes one or more processors 1631. Processors 1631 are used to control and manage the interface boards, communicate with the central processing unit on the main control board, and forward data flows. The memory 1632 on the interface board 1630 is used to store forwarding table entries. Processor 1631 forwards data flows by searching the forwarding table entries stored in memory 1632.

[0350] The interface board 1630 includes one or more communication interfaces 1633 for receiving data streams or other information sent by a terminal or other network device, and processing these data streams or data according to the instructions of the processor 1631. The specific implementation process will not be described in detail here.

[0351] It is understandable that Figure 16 As shown, the embodiment of the present application includes multiple interface boards and adopts a distributed forwarding mechanism. Under this mechanism, the operation on the interface board 1640 is basically similar to the operation of the interface board 1630. For the sake of brevity, it will not be repeated. In addition, it can be understood that Figure 16 The processors 1631 and / or 1641 in the interface board 1630 can be dedicated hardware or chips, such as network processors or application-specific integrated circuits (ASICs), to implement the above functions. This implementation is what is commonly referred to as the forwarding plane using dedicated hardware or chip processing. The specific implementation of using a dedicated hardware or chip such as a network processor can be referred to below. Figure 11 In another embodiment, the processor 1631 and / or 1641 may also be a general-purpose processor, such as a general-purpose CPU, to implement the functions described above.

[0352] It should also be noted that there may be one or more main control boards, including a primary and backup main control board. There may also be one or more interface boards. The higher the data processing capability of the device, the more interface boards are provided. With multiple interface boards, they can communicate with each other through one or more switching fabric boards, and when there are multiple boards, they can collectively implement load balancing and redundant backup. In a centralized forwarding architecture, the device may not require a switching fabric board; the interface board handles the entire system's service data processing. In a distributed forwarding architecture, the device includes multiple interface boards, which can exchange data between them through the switching fabric board, providing high-capacity data exchange and processing capabilities. Therefore, the data access and processing capabilities of communication devices with a distributed architecture are greater than those of devices with a centralized architecture. The specific architecture to be adopted depends on the specific network deployment scenario and is not limited here.

[0353] In some embodiments, the memory 1632 may be a read-only memory (ROM), a random access memory (RAM), an electrically erasable programmable read-only memory (EEPROM), an optical disc including (compact disc read-only memory (CD-ROM), a compact disc, a laser disc, a digital versatile disc, a Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 1632 may exist independently and be connected to the processor 1631 via a communication bus. The memory 1632 may also be integrated with the processor 1631.

[0354] In some embodiments, the communication interface 1633 can be a device using any transceiver type for communicating with other devices or communication networks, such as Ethernet, radio access network (RAN), wireless local area network (WLAN), etc. The communication interface 1633 includes a wired communication interface and may also include a wireless communication interface. Among them, the wired communication interface can be, for example, an Ethernet interface. The Ethernet interface can be an optical interface, an electrical interface, or a combination thereof. The wireless communication interface can be a WLAN interface, a cellular network communication interface, or a combination thereof. When the communication device acts as any communication device within the domain, the communication interface 1633 is used to forward data packets to other communication devices.

[0355] In some embodiments, the communication device may include multiple processors, each of which may be a single-core processor or a multi-core processor. A processor herein may refer to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).

[0356] In some embodiments, the memory 1632 is used to store program codes for executing the solution of the present application, and the processor 1631 can execute the program codes stored in the memory 1632 to prompt the communication device 1600 to execute the program codes. Figures 12 to 15 The processing steps of the access device or routing switching device or intermediate device in the embodiment shown can be referred to in detail. Figures 12 to 15 The detailed description of the illustrated embodiments will not be repeated here.

[0357] Figure 17 : This is a structural diagram of another communication device provided in an embodiment of the present application. The communication device can be an access device, a routing switching device, or an intermediate device in any of the above embodiments. In this embodiment, the communication device 1700 includes: a main control board 1710, an interface board 1730, a switching network board 1720, and an interface board 1740. The main control board 1710 is used to perform functions such as system management, equipment maintenance, and protocol processing. The switching network board 1720 is used to complete data exchange between various interface boards (interface boards are also called line cards or service boards). Interface boards 1730 and 1740 are used to provide various service interfaces (for example, POS interfaces, GE interfaces, ATM interfaces, etc.) and implement data packet forwarding. The control plane is composed of various control units on the main control board 1710 and control units on the interface boards 1730 and 1740. There are mainly three types of functional units on the main control board 1710: a system management control unit, a system clock unit, and a system maintenance unit. The main control board 1710, interface boards 1730 and 1740, and switching network board 1720 are interconnected via a system bus and the system backplane. The central processing unit 1731 on the interface board 1730 controls and manages the interface board and communicates with the central processing unit on the main control board. The forwarding table memory 1734 on the interface board 1730 stores forwarding entries. The network processor 1732 forwards data streams by searching the forwarding table memory 1734 for entries.

[0358] The physical interface card 1733 of the interface board 1730 is used to receive data streams or other data sent by a terminal or other device. The specific implementation process will not be described in detail here.

[0359] The network processor 1732 is used to process the received data stream, etc. The specific functions of the network processor 1732 are not described in detail here. For example, the network processor 1732 can execute program code to prompt the communication device 1700 to execute Figures 12 to 15 The processing steps of the access device or routing switching device or intermediate device in the embodiment shown can be referred to in detail. Figures 12 to 15 The detailed description in the embodiments will not be repeated here.

[0360] It is understandable that Figure 17 As shown, the embodiment of the present application includes multiple interface boards and adopts a distributed forwarding mechanism. Under this mechanism, the operation on the interface board 1740 is basically similar to the operation of the interface board 1730. For the sake of brevity, it will not be repeated. In addition, as mentioned above, Figure 17 The functions of the network processors 1732 and 1742 can be replaced by application specific integrated circuits (ASICs).

[0361] It should also be noted that there may be one or more main control boards (SCUs), which may include both active and standby SCUs. There may also be one or more interface boards. The higher the data processing capability of the device, the more interface boards are provided. Interface boards may also have one or more physical interface cards. There may be no SCUs, one or more SCUs, and multiple SCUs can be used to achieve load balancing and redundant backup. In a centralized forwarding architecture, the device may not require SCUs; the interface boards handle service data processing for the entire system. In a distributed forwarding architecture, the device may have at least one SCU, which enables data exchange between multiple interface boards, providing high-capacity data exchange and processing capabilities. Therefore, the data access and processing capabilities of communication devices with a distributed architecture are greater than those of devices with a centralized architecture. The specific architecture to be adopted depends on the specific network deployment scenario and is not limited here.

[0362] Please refer to Figure 18 , Figure 18 1801, a communication bus 1802, a memory 1803, and one or more communication interfaces 1804.

[0363] The processor 1801 is a general-purpose central processing unit (CPU), a network processing (NP), a microprocessor, or one or more integrated circuits for implementing the solution of the present application, such as an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. Optionally, the PLD is a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a generic array logic (GAL), or any combination thereof. When the communication device is any access device, routing switching device, or intermediate device in the embodiments of the present application, the processor 1801 is used to implement Figures 12 to 15 Any of the embodiments shown provides an optical communication method.

[0364] Communication bus 1802 is used to transmit information between the above components. Optionally, communication bus 1802 is divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is used in the figure, but this does not mean that there is only one bus or only one type of bus.

[0365] Optionally, the memory 1803 is a read-only memory (ROM), a random access memory (RAM), an electrically erasable programmable read-only memory (EEPROM), an optical disc (including a compact disc read-only memory (CD-ROM), a compact disc, a laser disc, a digital versatile disc, a Blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited thereto. The memory 1803 exists independently and is connected to the processor 1801 via the communication bus 1802, or the memory 1803 is integrated with the processor 1801.

[0366] Communication interface 1804 uses any transceiver-like device for communicating with other devices or communication networks. Communication interface 1804 includes a wired communication interface and, optionally, a wireless communication interface. Examples of wired communication interfaces include Ethernet interfaces. Optionally, the Ethernet interface is an optical interface, an electrical interface, or a combination thereof. The wireless communication interface is a wireless local area network (WLAN) interface, a cellular network communication interface, or a combination thereof.

[0367] Optionally, in some embodiments, the communication device includes multiple processors, such as Figure 18 1 and 1805. Each of these processors is a single-core processor or a multi-core processor. Optionally, the processor here refers to one or more devices, circuits, and / or processing cores for processing data (such as computer program instructions).

[0368] In some embodiments, the communication device further includes an output device 1806 and an input device 1807. The output device 1806 communicates with the processor 1801 and can display information in a variety of ways. For example, the output device 1806 can be a liquid crystal display (LCD), a light emitting diode (LED) display device, a cathode ray tube (CRT) display device, or a projector. The input device 1807 communicates with the processor 1801 and can receive user input in a variety of ways. For example, the input device 1807 can be a mouse, a keyboard, a touch screen device, or a sensor device.

[0369] In some embodiments, the memory 1803 is used to store the program code 1810 for executing the solution of the present application, and the processor 1801 can execute the program code 1810 stored in the memory 1803, prompting the communication device to execute Figures 12 to 15 The processing steps of the access device or routing switching device or intermediate device in the embodiment shown can be referred to in detail. Figures 12 to 15 The detailed description of the illustrated embodiments will not be repeated here.

[0370] In the above embodiments, all or part of the embodiments can be implemented by software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments can be implemented in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer instructions are loaded and executed on a computer, all or part of the processes or functions described in the embodiments of the present application are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via a wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) method. The computer-readable storage medium can be any available medium that can be accessed by a computer, or a data storage device such as a server or data center that includes one or more available media integrated therein. The available medium may be a magnetic medium (e.g., a floppy disk, a hard disk, or a magnetic tape), an optical medium (e.g., a digital versatile disc (DVD)), or a semiconductor medium (e.g., a solid state disk (SSD)). It is worth noting that the computer-readable storage medium mentioned in the embodiments of the present application may be a non-volatile storage medium, in other words, a non-transient storage medium.

[0371] It should be understood that the "at least one" mentioned herein refers to one or more, and "a plurality of" refers to two or more. In the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in this article is merely a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in order to facilitate a clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish between identical or similar items with substantially the same functions and effects. Those skilled in the art will understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit them to be different.

[0372] It should be noted that the information (including but not limited to user device information, user personal information, etc.), data (including but not limited to data used for analysis, stored data, displayed data, etc.), and signals involved in the embodiments of this application are all authorized by the user or fully authorized by all parties, and the collection, use, and processing of relevant data must comply with the relevant laws, regulations, and standards of the relevant countries and regions. For example, the uplink and downlink information involved in the embodiments of this application are all obtained with full authorization.

[0373] The above description is an embodiment provided for this application and is not intended to limit this application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. An optical networking system, characterized in that: The optical networking system includes a central optical module, an intermediate device, and a plurality of access side optical modules, wherein the central optical module is connected to the intermediate device via an optical fiber, the intermediate device includes a plurality of ports, each of the plurality of access side optical modules is connected to any one of the plurality of ports via an optical fiber, different access side optical modules are connected to different ports, each port corresponds to a downstream wavelength, different ports correspond to different downstream wavelengths, each downstream wavelength is also matched with an upstream wavelength, and different downstream wavelengths match different upstream wavelengths; The intermediate device is used to transmit an optical signal of a downlink wavelength corresponding to each port to the access side optical module connected to the port through each port of the multiple ports; Each of the multiple access side optical modules is used to generate an optical signal of a specified wavelength and transmit the optical signal of the specified wavelength to the port to which the access side optical module is connected, and the optical signals generated by the multiple access side optical modules have the same specified wavelength; The intermediate device is configured to generate an optical signal of an upstream wavelength matching the downstream wavelength corresponding to the port based on an optical signal of a specified wavelength received by each of the multiple ports, and transmit the optical signal of the upstream wavelength to the central optical module.

2. The system according to claim 1, wherein The intermediate device comprises at least one first laser, and the at least one first laser is used to generate an optical signal of the upstream wavelength; The intermediate device has an external power supply, which is used to supply power to any one of the at least one first laser; alternatively, an optoelectronic composite cable is connected between the access side optical module and the port, and the access side optical module is also used to supply power to any one of the first lasers through the optoelectronic composite cable; alternatively, an electrical cable is connected between the access side optical module and the port, and the access side optical module is also used to supply power to any one of the first lasers through the electrical cable.

3. The system according to claim 2, wherein: Each of the multiple ports is connected to a first laser, and each of the multiple access side optical modules is connected to the port via an optoelectronic composite cable. Each access side optical module is used to power the first laser connected to the access side optical module via the optoelectronic composite cable connected to the access side optical module.

4. The system according to any one of claims 1 to 3, wherein: The intermediate device further includes a first combiner, and the central optical module further includes a first splitter; The first combiner is used to combine the optical signals of multiple upstream wavelengths generated by the intermediate device into a first upstream optical signal, and transmit the first upstream optical signal to the central optical module; The first splitter is used to receive a second uplink optical signal and decompose the second uplink optical signal into the multiple uplink wavelength optical signals. The second uplink optical signal is an optical signal of the first uplink optical signal transmitted through the optical fiber between the intermediate device and the central optical module.

5. The system according to any one of claims 1 to 3, wherein: The central optical module is used to transmit a first downlink optical signal to the intermediate device, where the first downlink optical signal has multiple downlink wavelengths, and the multiple downlink wavelengths include at least one downlink wavelength corresponding to the port; The intermediate device is further configured to receive a second downstream optical signal and decompose the second downstream optical signal into optical signals of the multiple downstream wavelengths. The second downstream optical signal is an optical signal of the first downstream optical signal transmitted through the optical fiber between the central optical module and the intermediate device.

6. The system according to claim 5, wherein: The central optical module includes a second combiner, and the intermediate device includes a second splitter; The second combiner is configured to combine the optical signals of the multiple downstream wavelengths into the first downstream optical signal, and transmit the first downstream optical signal to the intermediate device; The second demultiplexer is configured to decompose the second downstream optical signal into optical signals of the multiple downstream wavelengths.

7. The system according to any one of claims 1 to 6, wherein: The access side optical module is inserted into the access device, or the access side optical module is integrated into the access device, and the access device is used to access the optical networking system through the access side optical module; The central optical module is inserted into the routing switching device, or the central optical module is integrated into the routing switching device, and the routing switching device is used to communicate with the access device through the central optical module.

8. An optical communication method, characterized in that: A first optical module among multiple access side optical modules included in an optical networking system, the optical networking system also including an intermediate device, the intermediate device including multiple ports, each of the multiple access side optical modules is connected to any one of the multiple ports via an optical fiber, and different access side optical modules are connected to different ports, wherein the first optical module is connected to the first port among the multiple ports; each port corresponds to a downlink wavelength, different ports correspond to different downlink wavelengths, each downlink wavelength is further matched with an uplink wavelength, and different downlink wavelengths match different uplink wavelengths, and the multiple access side optical modules are configured to generate optical signals of the same specified wavelength; the method comprising: generating an optical signal of the specified wavelength; The optical signal of the specified wavelength is transmitted to the first port, where the optical signal of the specified wavelength is used by the intermediate device to generate an optical signal of a first upstream wavelength, where the first upstream wavelength is an upstream wavelength that matches the downstream wavelength corresponding to the first port.

9. The method according to claim 8, wherein The intermediate device includes a first laser, wherein the first laser is used to generate an optical signal of the first upstream wavelength; The first optical module is connected to the first port via an optoelectronic composite cable, the first port is connected to the first laser via an optical fiber, the optoelectronic composite cable is used to transmit the optical signal of the specified wavelength, and the first optical module is also used to supply power to the first laser via the optoelectronic composite cable.

10. The method according to claim 8 or 9, characterized in that The first optical module is inserted into an access device, or the first optical module is integrated into the access device, and the access device is used to access the optical networking system through the first optical module.

11. An optical communication method, characterized in that: An intermediate device used in an optical networking system, the optical networking system further comprising a central optical module and multiple access side optical modules, the central optical module being connected to the intermediate device via an optical fiber, the intermediate device comprising multiple ports, each of the multiple access side optical modules being connected to any one of the multiple ports via an optical fiber, different access side optical modules being connected to different ports, each port corresponding to a downlink wavelength, different ports corresponding to different downlink wavelengths, each downlink wavelength also being matched with an uplink wavelength, and different downlink wavelengths being matched with different uplink wavelengths; the method comprising: receiving, through each of the multiple ports, an optical signal of a specified wavelength generated and transmitted by an access-side optical module connected to the port, wherein the optical signals generated by the multiple access-side optical modules have the same specified wavelength; Based on the optical signal of the specified wavelength received by each port of the plurality of ports, an optical signal of an upstream wavelength matching the downstream wavelength corresponding to the port is generated; Transmitting the optical signal of the uplink wavelength to the central optical module.

12. The method according to claim 11, wherein The intermediate device comprises at least one first laser, and the at least one first laser is used to generate an optical signal of the upstream wavelength; The intermediate device has an external power supply, which is used to supply power to any one of the at least one first laser; alternatively, an optoelectronic composite cable is connected between the access side optical module and the port, and the access side optical module is also used to supply power to any one of the first lasers through the optoelectronic composite cable; alternatively, an electrical cable is connected between the access side optical module and the port, and the access side optical module is also used to supply power to any one of the first lasers through the electrical cable.

13. The method according to claim 12, wherein: Each of the multiple ports is connected to a first laser, and each of the multiple access side optical modules is connected to the port via an optoelectronic composite cable. Each access side optical module is used to power the first laser connected to the access side optical module via the optoelectronic composite cable connected to the access side optical module.

14. A first optical module, characterized in that: The first optical module is any one of the multiple access side optical modules included in the optical networking system. The optical networking system also includes an intermediate device. The intermediate device includes multiple ports. Each of the multiple access side optical modules is connected to any one of the multiple ports through an optical fiber. Different access side optical modules are connected to different ports. The first optical module is connected to the first port of the multiple ports. Each port corresponds to a downlink wavelength. Different ports correspond to different downlink wavelengths. Each downlink wavelength is also matched with an uplink wavelength. Different downlink wavelengths match different uplink wavelengths. The multiple access side optical modules are configured to generate optical signals of the same specified wavelength. The first optical module includes: An optical signal generating module, configured to generate an optical signal of the specified wavelength; An optical signal transmission module is used to transmit the optical signal of the specified wavelength to the first port, and the optical signal of the specified wavelength is used by the intermediate device to generate an optical signal of a first upstream wavelength, where the first upstream wavelength is an upstream wavelength that matches the downstream wavelength corresponding to the first port.

15. An intermediate device, characterized in that: The intermediate device is included in an optical networking system, which further includes a central optical module and multiple access side optical modules. The central optical module is connected to the intermediate device via an optical fiber. The intermediate device includes multiple ports. Each of the multiple access side optical modules is connected to any one of the multiple ports via an optical fiber. Different access side optical modules are connected to different ports. Each port corresponds to a downstream wavelength. Different ports correspond to different downstream wavelengths. Each downstream wavelength is also matched with an upstream wavelength. Different downstream wavelengths match different upstream wavelengths. The intermediate device includes: a receiving module, configured to receive, through each of the multiple ports, an optical signal of a specified wavelength generated and transmitted by an access-side optical module connected to the port, wherein the optical signals generated by the multiple access-side optical modules have the same specified wavelength; an optical signal generating module, configured to generate an optical signal of an upstream wavelength matching a downstream wavelength corresponding to the port based on an optical signal of a specified wavelength received by each of the multiple ports; The optical signal transmission module is used to transmit the optical signal of the uplink wavelength to the central optical module.

16. An optical networking system, characterized in that: The optical networking system includes a central optical module, an intermediate device, and multiple access side optical modules, wherein the central optical module is connected to the intermediate device via an optical fiber, the intermediate device includes multiple ports, each of the multiple access side optical modules is connected to any one of the multiple ports via an optical fiber, different access side optical modules are connected to different ports, each port corresponds to a pair of wavelengths, each pair of wavelengths includes an upstream wavelength and a downstream wavelength, and different ports correspond to different upstream wavelengths and different downstream wavelengths; The intermediate device is used to transmit the target optical signal of the downstream wavelength corresponding to the port and the optical signal to be modulated of the upstream wavelength corresponding to the port to the access side optical module connected to the port through each port of the multiple ports; The first optical module among the multiple access-side optical modules is used to receive a target optical signal of a first downstream wavelength and an optical signal to be modulated of a first upstream wavelength, modulate the optical signal to be modulated of the first upstream wavelength to obtain a target optical signal of the first upstream wavelength, and transmit the target optical signal of the first upstream wavelength to a first port connected to the first optical module, the first optical module is any one of the multiple access-side optical modules, and the first downstream wavelength and the first upstream wavelength are a pair of wavelengths corresponding to the first port; The intermediate device is further configured to transmit the target optical signal of the first upstream wavelength to the central optical module.

17. The system according to claim 16, wherein: The optical networking system further includes a light source pool, wherein the light source pool is connected to the intermediate device via an optical fiber; The light source pool is used to generate multiple upstream wavelengths of optical signals to be modulated, and transmit the multiple upstream wavelengths of optical signals to be modulated to the intermediate device, where the multiple upstream wavelengths include at least one upstream wavelength corresponding to the port.

18. The system according to claim 17, wherein: The light source pool is used to combine the multiple uplink wavelength optical signals to be modulated into a first optical signal to be modulated, and transmit the first optical signal to be modulated to the intermediate device; The intermediate device is further configured to receive a second optical signal to be modulated and decompose the second optical signal to be modulated into optical signals to be modulated at the multiple upstream wavelengths. The second optical signal to be modulated is an optical signal obtained by transmitting the first optical signal to be modulated through the optical fiber between the light source pool and the intermediate device.

19. The system of claim 18, wherein: The light source pool includes a first wave combiner, and the intermediate device further includes a first wave splitter, wherein the first wave combiner and the first wave splitter are connected via an optical fiber; The first combiner is configured to combine the multiple uplink wavelength optical signals to be modulated into the first optical signal to be modulated, and transmit the first optical signal to be modulated to the second demultiplexer; The first demultiplexer is used to receive the second optical signal to be modulated, and decompose the second optical signal to be modulated into optical signals to be modulated of the multiple upstream wavelengths.

20. The system according to any one of claims 16 to 19, wherein: The intermediate device further includes a plurality of second combiners connected to the plurality of ports in a one-to-one correspondence via optical fibers, and the first optical module includes a second splitter and a first modulator; The reference combiner among the plurality of second combiners is configured to combine the target optical signal of the first downstream wavelength and the optical signal to be modulated of the first upstream wavelength into a first downstream optical signal, and transmit the first downstream optical signal to the second splitter through the first port, wherein the reference combiner is a second combiner connected to the first port; The second demultiplexer is configured to receive a second downlink optical signal, decompose the second downlink optical signal into a target optical signal of the first downlink wavelength and an optical signal to be modulated of the first uplink wavelength, and transmit the optical signal of the first uplink wavelength to the first modulator, wherein the second downlink optical signal is an optical signal obtained by transmitting the first downlink optical signal via the optical fiber between the first port and the first optical module; The first modulator is configured to modulate the optical signal to be modulated at the first upstream wavelength to obtain a target optical signal at the first upstream wavelength, and transmit the target optical signal at the first upstream wavelength to the first port.

21. The system of claim 20, wherein: The first port is connected to the second wave splitter and the first modulator respectively through optical fibers, and the first modulator is also connected to the second wave splitter through optical fibers.

22. The system of claim 21, wherein: The optical networking system also includes a circulator, which includes a second port, a third port and a fourth port. The second port is connected to the first port via an optical fiber, the third port is connected to the second splitter via an optical fiber, and the fourth port is connected to the first port via an optical fiber. The first modulator includes an input end and an output end. The input end of the first modulator is connected to the second splitter via an optical fiber, and the output end of the first modulator is connected to the third port via an optical fiber.

23. The system according to any one of claims 19 to 22, wherein: The intermediate device further includes a third splitter connected to each of the plurality of second combiners, and the central optical module further includes a third combiner; The third combiner is configured to combine target optical signals of multiple downstream wavelengths into the third downstream optical signal, and transmit the third downstream optical signal to the intermediate device, wherein the third downstream optical signal has the multiple downstream wavelengths, and the multiple downstream wavelengths include at least one downstream wavelength corresponding to the port; The third splitter is used to receive a fourth downstream optical signal, decompose the fourth downstream optical signal into target optical signals of the multiple downstream wavelengths, and transmit the target optical signal of the downstream wavelength corresponding to the port connected to each second combiner to each of the multiple second combiners, where the fourth downstream optical signal is an optical signal obtained by transmitting the third downstream optical signal through the optical fiber between the central optical module and the intermediate device.

24. The system according to any one of claims 16 to 23, wherein: The intermediate device further includes a fourth combiner, the fourth combiner is connected to the plurality of ports respectively via optical fibers, and the central optical module further includes a fourth splitter; The fourth combiner is configured to combine target optical signals of multiple upstream wavelengths into a first upstream optical signal, and transmit the first upstream optical signal to the central optical module, wherein the multiple upstream wavelengths include at least one upstream wavelength corresponding to the port; The fourth splitter is used to receive a second uplink optical signal and decompose the second uplink optical signal into target optical signals of the multiple uplink wavelengths. The second uplink optical signal is an optical signal of the first uplink optical signal after being transmitted through the optical fiber between the intermediate device and the central optical module.

25. The system according to any one of claims 16 to 24, wherein: The access side optical module is inserted into the access device, or the access side optical module is integrated into the access device, and the access device is used to access the optical networking system through the access side optical module; The central optical module is inserted into the routing switching device, or the central optical module is integrated into the routing switching device, and the routing switching device is used to communicate with the access device through the central optical module.

26. An optical communication method, characterized in that: A method for transmitting a first optical module among multiple access-side optical modules included in an optical networking system, wherein the optical networking system further includes an intermediate device, the intermediate device includes multiple ports, each of the multiple access-side optical modules is connected to any one of the multiple ports via an optical fiber, wherein the first optical module is connected to the first port among the multiple ports, each port corresponds to a pair of wavelengths, each pair of wavelengths includes an upstream wavelength and a downstream wavelength, and different ports correspond to different upstream wavelengths and different downstream wavelengths; the method comprising: Acquire a target optical signal of a first downstream wavelength and an optical signal to be modulated of a first upstream wavelength transmitted by the first port, where the first downstream wavelength and the first upstream wavelength are a pair of wavelengths corresponding to the first port; modulating the optical signal to be modulated at the first upstream wavelength to obtain a target optical signal at the first upstream wavelength; Transmit a target optical signal of the first upstream wavelength to the first port.

27. An optical communication method, characterized in that: An intermediate device used in an optical networking system, the intermediate device including multiple ports, the optical networking system further including a central optical module and multiple access side optical modules, the central optical module being connected to the intermediate device via an optical fiber, each of the multiple access side optical modules being connected to any one of the multiple ports via an optical fiber, different access side optical modules being connected to different ports, each port corresponding to a pair of wavelengths, the pair of wavelengths including an upstream wavelength and a downstream wavelength, different ports corresponding to different upstream wavelengths and corresponding to different downstream wavelengths; the method comprising: Acquire a target optical signal of a first downstream wavelength, and acquire an optical signal to be modulated of a first upstream wavelength, where the first downstream wavelength and the first upstream wavelength are a pair of wavelengths corresponding to a first port, and the first port is any one of the multiple ports; transmitting a target optical signal of the first downstream wavelength and an optical signal to be modulated of the first upstream wavelength to a first optical module through the first port, wherein the optical signal to be modulated of the first upstream wavelength is used by the first optical module to obtain a target optical signal of the first upstream wavelength through modulation, and the first optical module is an access-side optical module connected to the first port among the multiple access-side optical modules; receiving, through the first port, a target optical signal of the first upstream wavelength transmitted by the first optical module; Transmitting a target optical signal of the first upstream wavelength to the central optical module.

28. The method of claim 27, wherein: The optical networking system further includes a light source pool, the light source pool being connected to the intermediate device via an optical fiber, the light source pool being configured to generate optical signals to be modulated at multiple upstream wavelengths, the multiple upstream wavelengths including the first upstream wavelength; The obtaining of the first uplink wavelength optical signal to be modulated includes: Acquire the optical signal to be modulated at the first upload wavelength transmitted by the light source pool.

29. A first optical module, characterized in that: The first optical module is any one of a plurality of access side optical modules included in the optical networking system, the optical networking system further includes an intermediate device, the intermediate device includes a plurality of ports, each of the plurality of access side optical modules is connected to any one of the plurality of ports via an optical fiber, wherein the first optical module is connected to a first port of the plurality of ports, each port corresponds to a pair of wavelengths, each pair of wavelengths includes an upstream wavelength and a downstream wavelength, and different ports correspond to different upstream wavelengths and different downstream wavelengths; the first optical module includes: an acquisition module, configured to acquire a target optical signal of a first downstream wavelength and an optical signal to be modulated of a first upstream wavelength transmitted by the first port, where the first downstream wavelength and the first upstream wavelength are a pair of wavelengths corresponding to the first port; a modulation module, configured to modulate the optical signal to be modulated at the first uplink wavelength to obtain a target optical signal at the first uplink wavelength; An optical signal transmission module is configured to transmit a target optical signal of the first upstream wavelength to the first port.

30. An intermediate device, characterized in that: The intermediate device is included in the optical networking system, the intermediate device includes multiple ports, the optical networking system also includes a central optical module and multiple access side optical modules, the central optical module is connected to the intermediate device through an optical fiber, each of the multiple access side optical modules is connected to any one of the multiple ports through an optical fiber, different access side optical modules are connected to different ports, each port corresponds to a pair of wavelengths, the pair of wavelengths includes an upstream wavelength and a downstream wavelength, different ports correspond to different upstream wavelengths and corresponding downstream wavelengths are also different; the intermediate device includes: an acquisition module, configured to acquire a target optical signal of a first downstream wavelength and an optical signal to be modulated of a first upstream wavelength, wherein the first downstream wavelength and the first upstream wavelength are a pair of wavelengths corresponding to a first port, and the first port is any one of the multiple ports; an optical signal transmission module, configured to transmit a target optical signal of the first downstream wavelength and an optical signal to be modulated of the first upstream wavelength to a first optical module through the first port, wherein the optical signal to be modulated of the first upstream wavelength is used by the first optical module to obtain a target optical signal of the first upstream wavelength by modulation, and the first optical module is an access-side optical module connected to the first port among the multiple access-side optical modules; a receiving module, configured to receive, through the first port, a target optical signal of the first uplink wavelength transmitted by the first optical module; An optical signal transmission module is used to transmit the target optical signal of the first uplink wavelength to the central optical module.

31. An optical networking system, characterized in that: The optical networking system includes a central optical module, an intermediate device, and multiple access side optical modules, wherein the central optical module is connected to the intermediate device via an optical fiber, the intermediate device includes multiple ports, each of the multiple access side optical modules is connected to any one of the multiple ports via an optical fiber, different access side optical modules are connected to different ports, each port corresponds to a pair of wavelengths, each pair of wavelengths includes an upstream wavelength and a downstream wavelength, and different ports correspond to different upstream wavelengths and different downstream wavelengths; The intermediate device is used to transmit an optical signal of a downlink wavelength corresponding to each port to the access side optical module connected to the port through each port of the multiple ports; The first optical module among the multiple access-side optical modules is used to receive an optical signal of a first downstream wavelength transmitted by a first port connected to the first optical module, determine an upstream wavelength paired with the first downstream wavelength from multiple upstream wavelengths, obtain a first upstream wavelength, generate an optical signal of the first upstream wavelength, and transmit the optical signal of the first upstream wavelength to the first port, the multiple upstream wavelengths include upstream wavelengths corresponding to the multiple ports, the first optical module is any one of the multiple access-side optical modules, and the first downstream wavelength is a downstream wavelength corresponding to the first port; The intermediate device is further configured to transmit the optical signal of the first upstream wavelength to the central optical module.

32. The system of claim 31, wherein: The first optical module includes a plurality of single-frequency lasers corresponding to the plurality of uplink wavelengths, each of the plurality of single-frequency lasers being capable of generating an optical signal of an uplink wavelength corresponding to the single-frequency laser; or The first optical module includes a tunable laser, and the tunable laser can generate an optical signal of any one of the multiple upstream wavelengths.

33. The system of claim 32, wherein: The first optical module further includes a first combiner, the laser is connected to the first combiner via an optical fiber, and the first combiner is connected to the first port via an optical fiber; The first combiner is capable of receiving an optical signal of any one of the multiple upstream wavelengths, and performing multiplexing processing on the received optical signal of the upstream wavelength before transmitting the signal to the first port.

34. An optical communication method, characterized in that: A method for applying a first optical module among multiple access-side optical modules included in an optical networking system, wherein the optical networking system further includes an intermediate device, wherein the intermediate device includes multiple ports, and each access-side optical module of the multiple access-side optical modules is connected to any one of the multiple ports, wherein the first optical module is connected to the first port of the multiple ports, each port corresponds to a pair of wavelengths, each pair of wavelengths includes an upstream wavelength and a downstream wavelength, and different ports correspond to different upstream wavelengths and different downstream wavelengths; and the method includes: receiving an optical signal of a first downstream wavelength transmitted by the first port, where the first downstream wavelength is a downstream wavelength corresponding to the first port; Determine an uplink wavelength paired with the first downlink wavelength from a plurality of uplink wavelengths to obtain a first uplink wavelength, wherein the plurality of uplink wavelengths include the uplink wavelengths corresponding to the plurality of ports; generating an optical signal of the first uplink wavelength; Transmitting an optical signal of the first upstream wavelength to the first port.

35. The method of claim 34, wherein: The first optical module includes a plurality of single-frequency lasers corresponding to the plurality of uplink wavelengths, each of the plurality of single-frequency lasers being capable of generating an optical signal of an uplink wavelength corresponding to the single-frequency laser; or The first optical module includes a tunable laser, and the tunable laser can generate an optical signal of any one of the multiple upstream wavelengths.

36. A first optical module, characterized in that: The first optical module is any one of a plurality of access side optical modules included in the optical networking system, the optical networking system further includes an intermediate device, the intermediate device includes a plurality of ports, each of the plurality of access side optical modules is connected to any one of the plurality of ports, wherein the first optical module is connected to a first port of the plurality of ports, each port corresponds to a pair of wavelengths, each pair of wavelengths includes an upstream wavelength and a downstream wavelength, different ports correspond to different upstream wavelengths and corresponding downstream wavelengths are also different; the first optical module includes: A receiving module, configured to receive an optical signal of a first downstream wavelength transmitted by the first port, where the first downstream wavelength is a downstream wavelength corresponding to the first port; a determining module, configured to determine an uplink wavelength paired with the first downlink wavelength from a plurality of uplink wavelengths to obtain a first uplink wavelength, wherein the plurality of uplink wavelengths include the uplink wavelengths corresponding to the plurality of ports; an optical signal generating module, configured to generate an optical signal of the first uplink wavelength; An optical signal transmission module is configured to transmit an optical signal of the first upstream wavelength to the first port.

37. An optical networking system, characterized in that: The optical networking system includes a central optical module, an intermediate device and multiple access side optical modules, the central optical module is connected to the intermediate device through an optical fiber, the intermediate device includes multiple ports, a first combiner and an optical cross module, each of the multiple access side optical modules is connected to any one of the multiple ports through an optical fiber, different access side optical modules are connected to different ports, the optical cross module includes multiple first input ports and multiple first output ports, the first combiner includes a second output port and multiple second input ports, the multiple first input ports are connected to the multiple ports in a one-to-one correspondence, the multiple first output ports are connected to the multiple second input ports in a one-to-one correspondence, each second input port corresponds to an uplink wavelength, and different second input ports correspond to different uplink wavelengths; Each of the multiple access side optical modules is used to generate an optical signal of any one of the uplink wavelengths and transmit the optical signal of the uplink wavelength to the port to which the access side optical module is connected, and the uplink wavelengths of the optical signals generated by different access side optical modules are different; The optical cross-connect module is configured to receive, through the plurality of first input ports, optical signals of a plurality of upstream wavelengths transmitted by the plurality of ports, and perform optical cross-connection on the plurality of upstream wavelength optical signals so that each of the plurality of first output ports outputs an optical signal of a target wavelength, where the target wavelength is an upstream wavelength corresponding to the second input port to which the first output port is connected; The first combiner is used to receive the multiple upstream wavelength optical signals output by the multiple first output ends through the multiple second input ends, combine the multiple upstream wavelength optical signals into a first upstream optical signal, and transmit the first upstream optical signal to the central optical module through the second output end.

38. An optical communication method, characterized in that: An intermediate device used in an optical networking system, the optical networking system also including a central optical module and multiple access side optical modules, the intermediate device including multiple ports, a first combiner and an optical cross module, each of the multiple access side optical modules is connected to any one of the multiple ports via an optical fiber, different access side optical modules are connected to different ports, the optical cross module includes multiple first input ports and multiple first output ports, the first combiner includes an output port and multiple second input ports, the multiple first input ports are connected to the multiple ports in a one-to-one correspondence, the multiple first output ports are connected to the multiple second input ports in a one-to-one correspondence, each second input port corresponds to an uplink wavelength, and different second input ports correspond to different uplink wavelengths; The method comprises: The optical cross-connect module receives optical signals of multiple upstream wavelengths transmitted by the multiple ports through the multiple first input ports, the optical signals of the upstream wavelengths are generated by the access side optical modules, different access side optical modules generate optical signals of different upstream wavelengths, and each access side optical module is used to generate an optical signal of any one of the upstream wavelengths; The optical cross-connect module performs optical cross-connection on the optical signals of the multiple upstream wavelengths so that each of the multiple first output ports outputs an optical signal of a target wavelength, where the target wavelength is an upstream wavelength corresponding to the second input port connected to the first output port; The first combiner receives the multiple upstream wavelength optical signals output by the multiple first output ends through the multiple second input ends, combines the multiple upstream wavelength optical signals into a first upstream optical signal, and transmits the first upstream optical signal to the central optical module through the second output end.

39. An intermediate device, characterized in that: The intermediate device is included in an optical networking system, which further includes a central optical module and multiple access side optical modules. The intermediate device includes multiple ports, a first combiner and an optical cross module. Each of the multiple access side optical modules is connected to any one of the multiple ports through an optical fiber, and different access side optical modules are connected to different ports. The optical cross module includes multiple first input ports and multiple first output ports. The first combiner includes an output port and multiple second input ports. The multiple first input ports are connected to the multiple ports in a one-to-one correspondence, and the multiple first output ports are connected to the multiple second input ports in a one-to-one correspondence. Each second input port corresponds to an uplink wavelength, and different second input ports correspond to different uplink wavelengths. The optical cross-connect module is configured to receive, through the multiple first input ports, optical signals of multiple upstream wavelengths transmitted by the multiple ports, the optical signals of the upstream wavelengths being generated by the access-side optical modules, different access-side optical modules generating optical signals having different upstream wavelengths, and each access-side optical module being configured to generate an optical signal of any one of the upstream wavelengths; The optical cross-connect module is further configured to perform optical cross-connection on the optical signals of the multiple upstream wavelengths so that each of the multiple first output ports outputs an optical signal of a target wavelength, where the target wavelength is an upstream wavelength corresponding to the second input port to which the first output port is connected; The first combiner is configured to receive the optical signals of the multiple upstream wavelengths output by the multiple first output ends through the multiple second input ends, combine the optical signals of the multiple upstream wavelengths into a first upstream optical signal, and transmit the first upstream optical signal to the central optical module through the second output end.

40. A computer-readable storage medium, characterized in that The storage medium stores a computer program, which implements the method of any one of claims 8-13, 26-28, 34-35, and 38 when executed by a processor.

41. A computer program product, characterized in that The computer program product stores computer instructions, and when the computer instructions are executed by a processor, the method of any one of claims 8-13, 26-28, 34-35, and 38 is implemented.

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