CN115515029A

CN115515029A - Transmission method of service optical signal, network equipment and optical network

Info

Publication number: CN115515029A
Application number: CN202110687742.6A
Authority: CN
Inventors: 米光灿; 刘晨; 常泽山
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2021-06-21
Filing date: 2021-06-21
Publication date: 2022-12-23
Also published as: WO2022267542A1

Abstract

The embodiment of the invention discloses a transmission method of a service optical signal, network equipment and an optical network, which are used for reducing networking cost and time delay and effectively avoiding congestion of optical signal transmission. The network equipment comprises a light source module, a wavelength selection module and a control module, wherein the light source module is connected with the wavelength selection module, and the wavelength selection module is connected with a plurality of optical transceivers; the light source module transmits M paths of first optical signals to the wavelength selection module, wherein M is a positive integer greater than 1; the wavelength selection module transmits K paths of second optical signals to N first optical transceivers, wherein K is a positive integer smaller than or equal to M, the N first optical transceivers are at least part of the plurality of optical transceivers, and K is a positive integer larger than or equal to N; the N first optical transceivers modulate a service electrical signal on each path of the second optical signal to output K paths of service optical signals.

Description

Transmission method of service optical signal, network equipment and optical network

Technical Field

The present application relates to the field of optical fiber communication technologies, and in particular, to a transmission method of a service optical signal, a network device, and an optical network.

Background

The data center is cascaded with a plurality of network devices, each network device comprises a plurality of transceiver modules, two transceiver modules can be connected through an optical switching module, and the optical switching module realizes the crossing of optical signals between the two transceiver modules. The optical switching module can cross to a corresponding output port based on a wavelength of an optical signal input via the input port. For this purpose, a separate wavelength tunable laser is conventionally disposed in each transceiver module, and the transceiver module emits optical signals of different wavelengths through the wavelength tunable laser.

However, the cost is significantly increased by configuring the wavelength tunable laser for each transceiver module, and the time required for tuning the wavelength of the wavelength tunable laser is in the order of milliseconds or even seconds, resulting in increased network delay. The wavelength of the optical signal output by each transceiver module is independently tuned by the laser, and the output optical signal is simultaneously transmitted to the same output port by the optical switching module due to the asynchronous wavelength tuning of the two transceiver modules, so that the network is congested and even the data transmission is interrupted.

Disclosure of Invention

The application provides a transmission method of a service optical signal, a network device and an optical network, which are used for reducing networking cost and time delay and effectively avoiding congestion of optical signal transmission.

In a first aspect, an embodiment of the present invention provides a transmission method for a service optical signal, where the transmission method is applied to a network device, and the network device includes a light source module, where the light source module is connected to a wavelength selection module, and the wavelength selection module is connected to multiple optical transceivers; the light source module transmits M paths of first optical signals to the wavelength selection module, wherein M is a positive integer greater than 1; the wavelength selection module transmits the K paths of second optical signals to N first optical transceivers, wherein K is a positive integer smaller than or equal to M, the N first optical transceivers are at least part of the optical transceivers, and K is a positive integer larger than or equal to N; the N first optical transceivers modulate the service electrical signal on each second optical signal to output K service optical signals. The N first optical transceivers and the at least one second optical transceiver are connected through at least one optical switching module, and the at least one optical switching module is used for transmitting K service optical signals from the N first optical transceivers to the at least one second optical transceiver.

It can be seen that in performing different computing tasks, only the wavelength selection module is required to change the wavelength of the second optical signal transmitted to the first optical transceiver so that the first optical transceiver transmits the traffic optical signal to a different second optical transceiver. Therefore, the first optical transceiver does not need to change the network architecture of the optical network in the process of data interaction with different second optical transceivers based on different calculation tasks, and networking cost is reduced.

And the first optical transceivers do not need to be independently provided with lasers with adjustable wavelengths, so that the cost of the first optical transceivers is reduced. The first optical transceiver directly modulates according to the second optical signal from the wavelength selection module, so that the network time delay is reduced.

Based on the first aspect, in an optional implementation manner, the wavelength selection module includes at least one input port and a plurality of output ports, the at least one input port is connected to the light source module, and the plurality of output ports are connected to the plurality of first optical transceivers in a one-to-one correspondence manner, where the plurality of first optical transceivers are in a one-to-one correspondence manner with the plurality of output ports of the same optical switch module, and the first optical transceivers are configured to transmit the traffic optical signals to the output ports corresponding to the optical switch module. Each first optical transceiver establishes a corresponding relationship with an output port of the optical switch module according to the wavelength of the service optical signal output by the first optical transceiver and the input port of the optical switch module connected with the first optical transceiver.

Therefore, the wavelength selection module allocates wavelengths to the first optical transceivers, so that the same output port of the optical switch module can be ensured, and only the service optical signal from one first optical transceiver corresponding to the output port is received. Then, the traffic optical signals from different first optical transceivers are not transmitted to the same output port of the optical switch module, thereby avoiding network congestion.

Based on the first aspect, in an optional implementation manner, the transmitting the K second optical signals to the N first optical transceivers by the wavelength selection module includes: the wavelength selection module transmits the second optical signal with the target wavelength to a target output port of the wavelength selection module, the target wavelength is determined according to the routing requirement of the service optical signal, and the target output port and the target wavelength have a corresponding relation. The target wavelength is a wavelength transmitted to the wavelength selection module, and the target output port is an output port included in the wavelength selection module and connected to the first optical transceiver.

Therefore, the light source module uniformly sends the M paths of first optical signals to the wavelength selection module, and the wavelength selection module is responsible for directly transmitting a second optical signal with a target wavelength to the first optical transceiver. The second optical signal of the target wavelength can meet the routing requirement of the service optical signal output by the first optical transceiver. And the wavelength selection module does not need to execute the action of inquiring the corresponding target wavelength and the target output port when executing the calculation task every time, thereby improving the efficiency of optical signal transmission.

Based on the first aspect, in an optional implementation manner, the transmitting, by the wavelength selection module, the K second optical signals to the N first optical transceivers includes: the method comprises the steps that a wavelength selection module obtains a current distribution list, wherein the current distribution list comprises a target wavelength and a corresponding relation of target output ports, the target wavelength is a wavelength transmitted to the wavelength selection module, and the target output port is an output port which is included by the wavelength selection module and connected with a first optical transceiver; the wavelength selection module transmits the second optical signal with the target wavelength to the target output port according to the current allocation list.

It can be seen that the first optical transceiver can transmit the service optical signal to a different second optical transceiver only by changing the wavelength of the second optical signal transmitted to the first optical transceiver by the wavelength selection module when performing different computing tasks. And the first optical transceiver does not need to change the network architecture of the optical network in the process of carrying out data interaction with different second optical transceivers based on different calculation tasks, thereby reducing the networking cost.

Based on the first aspect, in an optional implementation manner, the network device includes a control unit connected to the wavelength selection module, and the method further includes: the control unit acquires a plurality of distribution lists; the control unit acquires routing requirements, wherein the routing requirements comprise a source node and a sink node of a service optical signal, the source node is connected with the first optical transceiver, and the sink node is connected with the second optical transceiver; the control unit acquires a current distribution list corresponding to the routing requirement, wherein a service optical signal with a target wavelength output by the first optical transceiver is used for being transmitted to the second optical transceiver through the optical switching module; the control unit sends the current allocation list to the wavelength selection module.

Based on the first aspect, in an optional implementation manner, the obtaining, by the wavelength selection module, the current allocation list includes: the wavelength selection module acquires a plurality of distribution lists; the wavelength selection module acquires routing requirements, wherein the routing requirements comprise a source node and a sink node of a service optical signal, the source node is connected with a first optical transceiver, and the sink node is connected with a second optical transceiver; the wavelength selection module acquires a current distribution list corresponding to the routing requirement, wherein the service optical signal with the target wavelength output by the first optical transceiver is used for being transmitted to the second optical transceiver through the optical switching module.

Based on the first aspect, in an optional implementation manner, the controlling, by the wavelength selection module, the wavelength selection module according to the current allocation list includes: the wavelength selection module switches on an optical path between a target input port and a target output port of the wavelength selection module according to the current allocation list, wherein the target input port is an input port for inputting a first optical signal with a target wavelength.

Based on the first aspect, in an optional implementation manner, the wavelength selection module further includes at least one optical filter, and the wavelength selection module transmits the K second optical signals to the N first optical transceivers includes: the wavelength selection module filters K paths of second optical signals from the M paths of first optical signals through at least one optical filter.

Based on the first aspect, in an optional implementation manner, the network device includes a control unit connected to the wavelength selection module, and the transmitting, by the light source module, the M first optical signals to the wavelength selection module includes: the control unit controls the light source module to output a first light signal having a target wavelength.

Therefore, the light source module can transmit the first optical signal with the target wavelength to the wavelength selection module, and the routing requirement of the first optical transceiver can be effectively met.

Based on the first aspect, in an optional implementation manner, the first optical transceiver receives at least two second optical signals with different wavelengths from the K second optical signals.

In a second aspect, an embodiment of the present invention provides a network device, where the network device includes a light source module, the light source module is connected to a wavelength selection module, and the wavelength selection module is connected to multiple optical transceivers; the light source module is used for transmitting M paths of first optical signals to the wavelength selection module, and M is a positive integer greater than 1; the wavelength selection module is used for transmitting K paths of second optical signals to N first optical transceivers, K is a positive integer smaller than or equal to M, the N first optical transceivers are at least part of the optical transceivers, and K is a positive integer larger than or equal to N; the N first optical transceivers are used for modulating the service electric signals on each path of second optical signals to output K paths of service optical signals.

For a description of the beneficial effects of the present invention, please refer to the description of the first aspect, which is not repeated.

Based on the second aspect, in an optional implementation manner, the wavelength selection module includes at least one input port and a plurality of output ports, the at least one input port is connected to the light source module, and the plurality of output ports are connected to the plurality of first optical transceivers in a one-to-one correspondence manner, where the plurality of first optical transceivers are in a one-to-one correspondence manner with the plurality of output ports of the same optical switch module, and the first optical transceivers are configured to transmit traffic optical signals to the output ports corresponding to the optical switch module.

Based on the second aspect, in an optional implementation manner, the wavelength selection module is specifically configured to transmit the second optical signal with the target wavelength to a target output port of the wavelength selection module, where the target wavelength is determined according to a routing requirement of the service optical signal, and the target output port has a corresponding relationship with the target wavelength.

Based on the second aspect, in an optional implementation manner, the wavelength selection module is specifically configured to: acquiring a current distribution list, wherein the current distribution list comprises a target wavelength and a corresponding relation of target output ports, the target wavelength is a wavelength transmitted to a wavelength selection module, and the target output port is an output port which is included by the wavelength selection module and connected with a first optical transceiver; and transmitting the second optical signal with the target wavelength to the target output port according to the current allocation list.

Based on the second aspect, in an optional implementation manner, the network device includes a control unit connected to the wavelength selection module, and the control unit is configured to: acquiring a plurality of distribution lists; acquiring routing requirements, wherein the routing requirements comprise a source node and a sink node of a service optical signal, the source node is connected with a first optical transceiver, and the sink node is connected with a second optical transceiver; acquiring a current distribution list corresponding to the routing requirement, wherein a service optical signal with a target wavelength output by a first optical transceiver is used for being transmitted to a second optical transceiver through an optical switching module; and sending the current allocation list to the wavelength selection module.

Based on the second aspect, in an optional implementation manner, the wavelength selection module is specifically configured to: acquiring a plurality of distribution lists; acquiring routing requirements, wherein the routing requirements comprise a source node and a sink node of a service optical signal, the source node is connected with a first optical transceiver, and the sink node is connected with a second optical transceiver; and acquiring a current distribution list corresponding to the routing requirement, wherein the service optical signal with the target wavelength output by the first optical transceiver is used for being transmitted to the second optical transceiver through the optical switching module.

Based on the second aspect, in an optional implementation manner, the wavelength selection module is specifically configured to turn on an optical path between a target input port and a target output port of the wavelength selection module according to the current allocation list, where the target input port is an input port for inputting a first optical signal with a target wavelength.

Based on the second aspect, in an optional implementation manner, the wavelength selection module further includes at least one optical filter, and the wavelength selection module is specifically configured to filter out K paths of second optical signals from the M paths of first optical signals through the at least one optical filter.

Based on the second aspect, in an optional implementation manner, the network device includes a control unit connected to the wavelength selection module, and the control unit is configured to control the light source module to output the first optical signal with the target wavelength.

Based on the second aspect, in an optional implementation manner, the first optical transceiver receives at least two second optical signals with different wavelengths from the K second optical signals.

In a third aspect, an embodiment of the present invention provides an optical network, where the optical network includes a plurality of optical transceivers, where the plurality of optical transceivers includes N first optical transceivers and at least one second optical transceiver, the N first optical transceivers and the at least one second optical transceiver are connected through at least one optical switch module, the N first optical transceivers are located in a network device, and the network device is as shown in any one of the second aspects; the at least one optical switching module is used for transmitting the K service optical signals from the N first optical transceivers to the at least one second optical transceiver.

Therefore, data interaction is performed between the first optical transceiver and the second optical transceiver through the optical switching module, data interaction is directly performed between the first optical transceiver and the second optical transceiver through optical signals, electro-optical conversion is not needed, and time delay of data interaction between the two optical transceivers is effectively reduced. And the port of the optical switching module has no limit to the bandwidth, and the optical switching module can transmit optical signals with higher speed, so that the optical network can provide data interaction with large bandwidth and low time delay.

Based on the third aspect, in an optional implementation manner, the N first optical transceivers and the N second optical transceivers are located in the same network device, or the N first optical transceivers and the N second optical transceivers are located in different network devices.

Drawings

Fig. 1 is a diagram illustrating a structure of an optical network according to an embodiment of the present application;

fig. 2 is a diagram illustrating a first example of a network device provided in the present application;

FIG. 3 is a diagram illustrating a portion of a second exemplary embodiment of a network device;

fig. 4 is a diagram illustrating a structure of another embodiment of an optical network provided in the present application;

fig. 5 is a partial structural diagram of a third embodiment of a network device provided in the present application;

fig. 6 is a diagram illustrating a first exemplary structure of a filtering module provided in the present application;

FIG. 7 is a diagram illustrating a second exemplary structure of a filtering module provided in the present application;

fig. 8 is a diagram illustrating an application scenario of an optical network provided in the present application;

fig. 9 is a flowchart illustrating steps of a first embodiment of a method for transmitting a service optical signal provided in the present application;

fig. 10 is a diagram illustrating a partial structure of a fourth embodiment of a network device provided in the present application;

fig. 11 is a flowchart illustrating steps of a second embodiment of a transmission method of service optical signals provided in the present application;

fig. 12 is a flowchart illustrating steps of a third embodiment of a method for transmitting a service optical signal according to the present application.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example one

In this embodiment, a structure of an optical network applied in the present application is described with reference to fig. 1, where fig. 1 is a diagram illustrating a structure of an optical network according to an embodiment of the present application.

The optical network shown in this embodiment has the advantages of high switching speed, low optical power loss, low time delay, low cost, no wavelength competition, and the like. The optical network shown in this embodiment may be applied to a data center, a metropolitan area network, a Passive Optical Network (PON), long-haul transmission, and the like, and is not limited in this embodiment. In this embodiment, an optical network is applied to a data center, and the optical network may be a Data Center Network (DCN).

As shown in fig. 1, the optical network shown in this embodiment includes a plurality of network devices, and fig. 1 shows that the optical network includes a network device 101, a network device 102, a network device 103, and a network device 104 as an example. It should be clear that, the description of the number of network devices and the connection manner included in the optical network in this embodiment is an optional example and is not limited. The network device shown in this embodiment may also be referred to as a server.

For example, if the optical network shown in this embodiment is used to execute an Artificial Intelligence (AI) training service, it can be known that the AI training service is an intensive service, and in order to implement the AI training service, data interaction needs to be performed between a plurality of network devices included in the optical network device.

In order to implement data interaction among multiple network devices, as shown in fig. 1, any two of the network device 101, the network device 102, the network device 103, and the network device 104 are connected through an optical switch module. For example, the network device 101 has four ports, a first port of the network device 101 is connected to the optical switching module 111, a second port of the network device 101 is connected to the optical switching module 112, a third port of the network device 101 is connected to the optical switching module 113, and a fourth port of the network device 101 is connected to the optical switching module 114. Please refer to the description of the network device 101 for the description of the connection relationship between the network device 102, the network device 103, and the network device 104 and the optical switch module, which is not described in detail. It can be known that any two network devices can perform data interaction, for example, data output by the first port of the network device 101 can be transmitted to the first port of the network device 103 through the intersection of the optical switching module 111, so as to achieve the purpose that the network device 101 sends data to the network device 103, and for a description of data interaction between other network devices, please refer to a description of data interaction between the network device 101 and the network device 103, which is not described in detail.

It should be further understood that, in this embodiment, the description of the number of the optical switch modules and the description of the connection relationship between the optical switch modules and the ports of each network device are optional examples and are not limited. The optical switch module shown in this embodiment may be referred to as a wavelength-sensitive optical switch (WS-OXC), a reconfigurable optical add/drop multiplexer (ROADM), a wavelength cross connector (WXC), an optical switch node, or a wavelength switch node, and is not limited in this embodiment. Each optical switching module can be implemented based on wavelength division technologies such as a Wavelength Selective Switch (WSS), an Arrayed Waveguide Grating (AWG), an Arrayed Waveguide Grating Router (AWGR), and the like. It can be known that, because the optical switching module is implemented based on the wavelength division technology, under the condition that the wavelengths of the optical signals received by the optical switching module are different, the optical signals with different wavelengths can be transmitted along different paths in the optical switching module, so that the optical signals with different wavelengths can be output through different output ports of the optical switching module.

Based on the optical network shown in fig. 1, the following describes structures of network devices included in the optical network shown in this application with reference to fig. 2, where fig. 2 is a diagram illustrating a structure of a first embodiment of a network device provided in this application.

The network device 200 shown in this embodiment includes a light source module 210, and a wavelength selection module 220 connected to the light source module 210, where the wavelength selection module 220 is connected to X transceiver modules, a value of X shown in this embodiment is any positive integer greater than or equal to 1, for example, the wavelength selection module 220 is connected to a transceiver module 231 and a transceiver module 23X.

The transceiver module may include one or more computing nodes, and in the embodiment, taking the transceiver module 231 as an example, the transceiver module 231 includes one computing node 241. The compute node 241 shown in this embodiment is a node capable of performing a computing task, for example, the compute node 241 may be a Graphics Processing Unit (GPU), a field-programmable gate array (FPGA), an Application Specific Integrated Circuit (ASIC), a system on chip (SoC), a Central Processing Unit (CPU), a Network Processor (NP), a digital signal processing circuit (DSP), or other integrated chips, or any combination of the above chips or processors.

In the transceiver module, one or more optical transceivers are connected to each computing node, in this embodiment, taking the transceiver module 231 as an example, the first optical transceiver 242 is connected to the computing node 241, and in the transceiver module 23X, the first optical transceiver 244 is connected to the computing node 243.

The above-mentioned "connection" may specifically refer to that two optical devices (for example, the optical source module 210 and the wavelength selection module 220, and also, the wavelength selection module 220 and the first optical transceiver) are connected through an optical fiber or an optical waveguide (optical waveguide) to realize transmission of an optical signal.

Each optical device included in the network device shown in this embodiment is explained below:

first, the structure of the light source module 210 will be explained:

the light source module 210 shown in this embodiment is configured to send M paths of first optical signals to the wavelength selection module 220, where a value of M is any positive integer greater than 1. The first optical signal of the M channels is Continuous Wave (CW) laser. The wavelengths of the M first optical signals are different from each other. It can be known that the wavelengths of the M first optical signals transmitted by the light source module 210 to the wavelength selection module 220 are λ 1, λ 2 to λ M, respectively. For another example, at least some of the M paths of first optical signals have the same wavelength, which is not limited in this embodiment. The implementation of the light source module 210 shown in the present embodiment can be seen as follows:

fig. 3 is a diagram illustrating a partial structure of a network device according to a second embodiment of the present invention. The light source module 210 includes a plurality of lasers with fixed wavelengths, and for example, the light source module 210 is configured to send M paths of first optical signals with different wavelengths to the wavelength selection module 220, then the light source module 210 may include M lasers for outputting different wavelengths. For example, the light source module 210 includes a first laser for outputting a first optical signal having a wavelength λ 1, and so on, the light source module 210 includes an mth laser for outputting a first optical signal having a wavelength λ M. The description of the type of the laser included in the light source module 210 in this embodiment is an optional example, and is not limited, for example, in other examples, the laser included in the light source module 210 may also be a wavelength tunable laser, a semiconductor mode-locked laser, a mode-locked diode laser, a distributed bragg reflector laser, a fiber-coupled semiconductor laser, a fiber laser, or the like. In a case where the laser included in the light source module 210 is a semiconductor mode-locked laser, the M first optical signals output by the light source module 210 are optical frequency combs, and it can be known that the M first optical signals output by the light source module 210 are a series of comb-shaped spectral lines that are uniformly distributed in a frequency domain, fixed in position, and extremely wide in spectral range.

It should be clear that, in this embodiment, the description of the optical device included in the light source module 210 is an optional example, in other examples, the light source module 210 may further include one or more multiplexers (multiplexers) for multiplexing the multiple first optical signals to form a multiplexed optical signal, where the multiplexed optical signal can be output via the same output port of the light source module. For example, the combiner receives a first optical signal with a wavelength λ 1 and a first optical signal with a wavelength λ 2, the combiner combines the first optical signal with the wavelength λ 1 and the first optical signal with the wavelength λ 2 to obtain a combined optical signal, and the combined optical signal with the wavelengths λ 1 and λ 2 can be output through the same output port of the light source module 210 to be transmitted to the wavelength selection module 220.

For another example, the optical source module may further include one or more splitters, which are configured to split the optical signal from the laser into multiple first optical signals, so as to output the multiple first optical signals after being split through different output ports of the optical source module 210. As another example, the light source module may further include one or more power dividers (power dividers) for dividing the optical power of the laser light from the laser into multiple first optical signals of equal or unequal optical power. For another example, the light source module may further include an optical power amplifier to amplify optical power of the first optical signal to be output.

The light source module 210 shown in this embodiment has one or more output ports, and the one or more output ports are connected to the input port of the wavelength selection module 220, and it can be known that the light source module 210 transmits M paths of first optical signals to the wavelength selection module 220 through the one or more output ports. And each output port of the light source module 210 can output a first optical signal having one wavelength, or each output port of the light source module 210 can output multiple first optical signals having multiple different wavelengths.

It can be known that the optical device included in the optical source module 210 can adjust the wavelength combination of the first optical signals output by each output port included in the optical source module 210, for example, one output port can output multiple first optical signals with multiple different wavelengths by using a combiner. As another example, implementing different output ports through a demultiplexer can output first optical signals having different wavelengths from the same laser. For another example, the power splitter can output the first optical signals with the same wavelength and the same or different optical powers at different output ports.

The following describes a specific structure of the wavelength selection module 220 shown in this embodiment:

the wavelength selection module 220 shown in this embodiment is configured to transmit the K channels of second optical signals to N first optical transceivers. Specifically, the wavelength selection module 220 has received M first optical signals from the optical source module 210, and the wavelength selection module 220 selects the M first optical signals to transmit K second optical signals included in the M first optical signals to the N first optical transceivers. It can be seen that the K channels of second optical signals output by the wavelength selection module 220 are at least part of the M channels of first optical signals. N first optical transceivers are at least part of all optical transceivers included in the network device, and the first optical transceivers are configured to transmit optical signals from the light source module 210 to the second optical transceivers. Also, the first optical transceiver and the second optical transceiver may be located within the same network device, or the first optical transceiver and the second optical transceiver may be located within two different network devices.

In this embodiment, any one of the N first optical transceivers receives one path of second optical signal from the K paths of second optical signals, or the first optical transceiver receives two or more paths of second optical signals with different wavelengths from the K paths of second optical signals.

It can be seen that, since the K channels of second optical signals output by the wavelength selection module 220 are at least part of the M channels of first optical signals, the value of K is any positive integer less than or equal to M. The wavelength selection module 220 may send one or more paths of second optical signals to each of the N first optical transceivers, and it is known that the value of K is any positive integer greater than or equal to N. Taking the first optical transceiver 244 shown in fig. 2 as an example, the wavelength selection module 220 may transmit one or more second optical signals to the first optical transceiver 244, and for a description that other first optical transceivers receive the second optical signals, please refer to the description of the first optical transceiver 244, which is not described in detail herein.

The first optical transceiver 244 receives one or more second optical signals, the first optical transceiver 244 is connected to the computing node 243, and the first optical transceiver 244 can modulate the traffic electrical signal from the computing node 243 on the one or more second optical signals to output one or more traffic optical signals. For example, if the first optical transceiver 244 receives a second optical signal from the wavelength selection module 220, the first optical transceiver 244 can modulate a service electrical signal from the computing node 243 on the second optical signal, and the first optical transceiver 244 outputs a service optical signal. For another example, if the first optical transceiver 244 receives the multiple second optical signals from the wavelength selection module 220, the first optical transceiver 244 can modulate the multiple traffic electrical signals from the computation node 243 on the multiple second optical signals, respectively, and the first optical transceiver 244 outputs the multiple traffic optical signals. The network device comprises N first optical transceivers capable of modulating the service electrical signals on the K paths of second optical signals respectively to output K paths of service optical signals.

For one transceiver module, the computing node included in the transceiver module sends multiple service electrical signals to the first optical transceiver module included in the transceiver module, which can effectively extend the bandwidth output by the computing node, for example, each path of service electrical signal is a 25 switched bandwidth (Gbps) signal, and when the computing node outputs 4 paths of service electrical signals to the first optical transceiver, data transmission with a bandwidth of 100Gbps can be achieved.

The first optical transceiver 244 shown in this embodiment includes an optical modulator for modulating the service electrical signal from the computing node 243 on the second optical signal to obtain the service optical signal, and the type of the optical modulator shown in this embodiment is not limited, for example, the optical modulator may be an acousto-optic modulator, a magneto-optic modulator, an electro-optic modulator, or an electro-absorption modulator.

The following description is made with reference to fig. 4, where fig. 4 is a diagram illustrating a structure of another embodiment of an optical network provided in the present application.

As shown in fig. 4, the plurality of optical transceivers include a first optical transceiver 401, a first optical transceiver 402, a first optical transceiver 403, and a first optical transceiver 404 as transmitting ends, and further include a second optical transceiver 405, a second optical transceiver 406, a second optical transceiver 407, and a second optical transceiver 408 as receiving ends. Each optical transceiver is connected to the optical switch module 410, and based on the optical switch module, data interaction between any first optical transceiver and any second optical transceiver shown in fig. 4 can be implemented. For example, the service optical signal output by the first optical transceiver 401 can be transmitted to the second optical transceiver 407 via the cross of the optical switch module 410, so as to implement data interaction between the first optical transceiver 401 and the second optical transceiver 407. As can be seen from the description of fig. 1, when the wavelengths of the service optical signals received by the same input port of the optical switch module 410 are different, the optical switch module 410 can transmit the service optical signals having different wavelengths to different second optical transceivers.

For example, the optical switching module 410 has four input ports, i.e., an input port 411, an input port 412, an input port 413 through an input port 414. The four input ports are connected to the first optical transceiver 401, the first optical transceiver 402, the first optical transceiver 403, and the first optical transceiver 404 in a one-to-one correspondence. The optical switch module 410 has four output ports, namely, an output port 421, an output port 422, an output port 423, and an output port 424. The four output ports are respectively connected to the second optical transceiver 405, the second optical transceiver 406, the second optical transceiver 407, and the second optical transceiver 408 in a one-to-one correspondence. It should be understood that the description of the connection relationship between the optical switch module 410 and the plurality of optical transceivers shown in fig. 4 is an optional example, and is not limited.

Optionally, different optical transceivers shown in fig. 4 may be located in different network devices, or all the optical transceivers shown in fig. 4 may be located in the same network device, or a part of the optical transceivers shown in fig. 4 is located in one network device, and another part of the optical transceivers is located in one or more other network devices, and it is known that the number of the network devices in which all the optical transceivers shown in fig. 4 are located is not limited in this embodiment.

Taking the optical switching module 410 as WS-OXC as an example, the optical switching module 410 configures a cross correspondence in advance, where the cross correspondence is used to indicate a correspondence between an input port of the optical switching module 410, a wavelength of a service optical signal, and an output port of the optical switching module 410. As can be seen, the cross correspondence establishes correspondence between the wavelength of the service optical signal output by the first optical transceiver, the input port of the optical switch module 410 connected to the first optical transceiver, and the output port of the optical switch module 410. In the cross-correlation, the output port of the same optical switch module 410 only corresponds to the traffic optical signal from one optical transceiver, so as to avoid congestion. Based on the cross correspondence, the optical switching module 410 can transmit the service optical signal input through the input port to the output port corresponding to the input port and the wavelength in the cross correspondence based on the wavelength of the input port and the service optical signal. For example, the optical switching module 410 may refer to the following table 1 for the configured cross correspondence relationship of the input port 411:

TABLE 1

Input port	Wavelength of service optical signal	Output port
				411	λ1	Output port	421
411	λ2	Output port	422
				411	λ3	Output port	423
411	λ4	Output port	424

It is noted that, in order to ensure that the service optical signal output by the first optical transceiver 401 can be transmitted to the second optical transceiver 407, the service optical signal output by the first optical transceiver 401 needs to have a wavelength λ 3. The optical switch module 410 receives a traffic optical signal having a wavelength λ 3 from the first optical transceiver 401 via the input port 411, and the optical switch module 410 crosses the traffic optical signal having the wavelength λ 3 to the output port 423, and the output port 423 is connected to the second optical transceiver 407. It can be seen that the traffic optical signal having the wavelength λ 3 from the first optical transceiver 401 can be transmitted to the second optical transceiver 407 via the output port 423. Similarly, in order to ensure that the service optical signal output by the optical transceiver 401 can be transmitted to the optical transceiver 405, the service optical signal output by the first optical transceiver 401 needs to have a wavelength λ 1. The optical switch module 410 receives the service optical signal with the wavelength λ 1 from the first optical transceiver 401 at the input port 411, and the optical switch module 410 crosses the service optical signal with the wavelength λ 1 to the output port 421, and the output port 421 is connected to the second optical transceiver 405. It is understood that the traffic optical signal having the wavelength λ 1 from the first optical transceiver 401 can be transmitted to the optical transceiver 405 via the output port 421, and so on, without limitation.

The optical switch module 410 may also configure a cross correspondence relationship for the input port 412, the input port 413, and the input port 414, for a specific description, refer to a description of the cross correspondence relationship configured for the input port 411, which is not described in detail.

As can be seen from the description shown in fig. 4, the first optical transceiver transmits the traffic optical signal to the second optical transceiver, and the wavelength of the second optical signal received by the first optical transceiver may be a predetermined wavelength (e.g., λ 1 to λ 4 in table 1). For example, if the service optical signal output by the first optical transceiver 401 is transmitted to the second optical transceiver 407, the wavelength of the second optical signal received by the first optical transceiver 401 is λ 3, so that the wavelength of the service optical signal output by the first optical transceiver 401 is λ 3, and further the service optical signal is guaranteed to be transmitted to the second optical transceiver 407 through the cross of the optical switch module 410, the following describes how to implement the manner in which the first optical transceiver can receive the second optical signal with a specific wavelength:

as shown in fig. 2, the wavelength selection module 220 is capable of transmitting a second optical signal having a target wavelength to each first optical transceiver according to a routing requirement of a service optical signal output by the first optical transceiver. The routing requirement of the service optical signal refers to a source node (i.e., a computing node) that sends out a service electrical signal carried by the service optical signal and a sink node (i.e., a computing node) that needs to receive the service electrical signal. As shown in fig. 4, the source node 431 connected to the first optical transceiver 401 is a computing node connected to the first optical transceiver 401. Similarly, the source node 432 connected to the first optical transceiver 402 is a computing node connected to the first optical transceiver 402. The source node 433 connected to the first optical transceiver 403 is a computing node connected to the first optical transceiver 403. The source node 434 connected to the first optical transceiver 404 is a computing node connected to the first optical transceiver 404. The sink node 441 connected to the second optical transceiver 405 is a computing node connected to the second optical transceiver 402. Similarly, the sink node 442 connected to the second optical transceiver 406 is a computing node connected to the second optical transceiver 406. The sink node 443 connected to the second optical transceiver 407 is a computing node connected to the second optical transceiver 407. The sink node 444 connected to the second optical transceiver 408 is a computing node connected to the second optical transceiver 408.

The first optical transceiver may be any optical transceiver included in the network device 200, and the routing requirement of the traffic optical signal output by the first optical transceiver means that the traffic electrical signal of the source node connected to the first optical transceiver needs to be transmitted to the corresponding sink node. The wavelength selection module transmits a second optical signal having a target wavelength to the first optical transceiver to satisfy the routing requirement. For example, taking the first optical transceiver as the first optical transceiver 401 as an example, the routing requirement of the traffic optical signal output by the first optical transceiver 401 may mean that the traffic electrical signal output by the source node 431 needs to be transmitted to the sink node 443. The wavelength selection module may transmit a second optical signal having a target wavelength λ 3 to the first optical transceiver 401 according to the routing requirement, as shown in table 1. The first optical transceiver 401 modulates the traffic electrical signal from the source node 431 on the second optical signal having the target wavelength λ 3 to input the traffic optical signal to the input port 411. The optical switching module 410 cross-transmits the traffic optical signal having the target wavelength λ 3 from the input port 411 to the output port 423. The second optical transceiver 407 receives the traffic optical signal via the output port 423, and the second optical transceiver 407 demodulates the traffic optical signal into a traffic electrical signal and transmits the traffic electrical signal to the sink node 443.

It can be seen that, the wavelength selection module 220 shown in this embodiment can send a second optical signal meeting a target wavelength corresponding to a routing requirement to each first optical transceiver according to the routing requirement of a service optical signal output by each first optical transceiver in the N first optical transceivers, and for a description of the routing requirement of the service optical signal output by each optical transceiver, please refer to the description of the routing requirement of the first optical transceiver 401, which is not repeated herein.

The following describes how the wavelength selection module 220 transmits the second optical signal with the target wavelength according to the routing requirement of the service optical signal output by each first optical transceiver:

the wavelength selection module 220 shown in this embodiment includes one or more input ports through which the wavelength selection module 220 receives the M first optical signals from the optical source module. The wavelength selection module 220 includes a plurality of output ports, and in the case that the network device includes X optical transceivers, the wavelength selection module 220 includes X output ports, and the X output ports of the wavelength selection module 220 are connected to the X optical transceivers in a one-to-one correspondence.

For example, as shown in fig. 4, the wavelength selection module transmits a second optical signal with a target wavelength λ 3 to the first optical transceiver 401 according to a routing requirement of the traffic optical signal output by the first optical transceiver 401, so as to ensure that the traffic optical signal with the target wavelength λ 3 output by the first optical transceiver 401 can be successfully transmitted to the second optical transceiver 407 through the cross of the optical switch module 410. For this reason, the structure of the wavelength selection module shown in this embodiment may be several optional structures as shown below:

alternative Structure 1

As shown in fig. 5, fig. 5 is a partial structural example diagram of a network device according to a third embodiment of the present application. The wavelength selection module 500 includes at least one optical switch and at least one filtering module, and this embodiment takes as an example that a plurality of optical switches included in the wavelength selection module 500 are connected to a plurality of filtering modules in a one-to-one correspondence manner, in other examples, a plurality of filtering modules may also be connected through the same optical switch, and in this embodiment, the present embodiment is not limited specifically. The optical switch shown in this embodiment is used to connect an optical path between a target input port and at least one target output port, where the target input port is an input port included in the wavelength selective module 500, and the target output port is an output port included in the wavelength selective module 500. The filtering module shown in this embodiment is capable of transmitting the filtered second optical signal to a plurality of target output ports. It should be clear that, in this embodiment, the description of the number and the connection manner of the optical switch and the filter module is an optional example and is not limited.

As shown in fig. 5, the filtering module 511 is capable of transmitting the filtered second optical signal to the output port 521, the output port 522, the output port 523 and the output port 524 of the wavelength selection module 500. For example, the

output ports

521, 522, 523, and 524 are connected to the first optical transceiver 531, 532, 533, and 534 in a one-to-one correspondence. It can be known that, if it is determined that a second optical signal with a target wavelength λ 1 needs to be sent to the first optical transceiver 531 according to a routing requirement of a service optical signal output by the first optical transceiver 531, the filtering module 511 needs to send the second optical signal with the target wavelength λ 1 to the output port 521, and so on, the filtering module 511 needs to send the second optical signal with the target wavelength λ 2 to the output port 522, the filtering module 511 needs to send the second optical signal with the target wavelength λ 3 to the output port 523, and the filtering module needs to send the second optical signal with the target wavelength λ 4 to the output port 524, it is clear that the description of the target wavelength of the second optical signal output by the filtering module to each output port in this embodiment is an optional example and is not limited.

The network device shown in this embodiment further includes a control unit 540, where a specific setting position of the control unit 540 is not limited in this embodiment, for example, the control unit 540 is located in the wavelength selection module 500, or for example, the control unit 540 is independently disposed in the network device and is respectively connected to the light source module, the wavelength selection module, and each transceiver module, or for example, the control unit 540 may be one or more computing nodes included in the network device, and the like, and is not limited in this embodiment. For a specific implementation manner of the control unit 540 in this embodiment, reference may be made to the description of the implementation manner of the computing node shown above, which is not described in detail specifically.

The control unit 540 shown in this embodiment is connected to the optical switch 501 and the optical switch 502 respectively, specifically, the wavelength selection module 500 has an input port 503 and an input port 505, the filter module 511 has an input port 504, and the filter module 512 has an input port 506. An optical switch 501 is provided between an input port 503 and an input port 504, and an optical switch 502 is provided between an input port 505 and an input port 506.

The optical switch 501 shown in this embodiment turns on or off the optical path between the input port 503 and the input port 504 under the control of the control unit 540. For example, the present embodiment takes as an example that the optical switch 501 turns on the optical path between the input port 503 and the input port 504. It is known that at least one first optical signal input via the input port 503 can be transmitted to the filtering module 511 via the input port 504. It can be seen that in this example, the target input port is input port 503, and the target output ports are

output ports

521, 522, 523, and 524. In this embodiment, taking the optical switch 502 disconnecting the optical path between the input port 505 and the input port 506 as an example, it can be seen that at least one path of the first optical signal input through the input port 505 cannot be transmitted to the filtering module 512.

The present embodiment does not limit the specific implementation manner of the optical switch, for example, the optical switch shown in the present embodiment may be a mechanical optical switch, a Micro Electro Mechanical System (MEMS) optical switch, a free space element (e.g., a prism), and the like, and the optical switch 501 in the present embodiment may be driven by the control unit 540 to move or change the position, the angle, and the like of the optical switch 501 so as to conduct the optical path between the input port 503 and the input port 504. The optical switch 502 in this example may be driven by the control unit 540 to disconnect the optical path between the input port 505 and the input port 506. As another example, the optical switch shown in the present embodiment may be a non-mechanical optical switch, for example, the optical switch 501 changes the refractive index of the optical path between the input port 503 and the input port 504 under the control of the control unit 540 to conduct the optical path between the input port 503 and the input port 504, wherein the control unit 540 may change the refractive index of the optical path between the input port 503 and the input port 504 through an electro-optical effect, a magneto-optical effect, an acousto-optical effect, a thermo-optical effect, and the like. As another example, the optical switch 502 in this example may change the refractive index of the optical path between the input port 505 and the input port 506 under the control of the control unit 540 to break the optical path between the input port 505 and the input port 506.

Taking the filtering module 511 as an example, the filtering module 511 shown in this embodiment includes a plurality of cascaded optical filters, and the structure of the filtering module 511 is described below with reference to fig. 6, where fig. 6 is an example of the structure of the filtering module according to the first embodiment of the present application.

The filter module shown in this embodiment includes a first optical filter 601, a second optical filter 602 connected to the first optical filter 601, and a third optical filter 603 and a fourth optical filter 604 connected to the second optical filter 602, respectively. This embodiment exemplifies that each optical filter is a mach-zehnder interferometer (MZI): to realize that each MZI can realize filtering, an electro-optical phase shifter having a response speed of Nanosecond (NS) is disposed on one interference arm included in each optical filter, and each electro-optical phase shifter is connected to the control unit 540. The two interference arms of the third optical filter 603 are connected to the output port 521 and the output port 522, respectively, and the two interference arms of the fourth optical filter 604 are connected to the output port 523 and the output port 524, respectively.

The control unit 540 shown in this embodiment may configure an allocation list, which may be shown in table 2 as follows:

TABLE 2

The allocation list is used to indicate that if the output port 521, the output port 522, the output port 523, and the output port 524 are required to output the second optical signals with the target wavelengths λ 1, λ 2, λ 3, and λ 4, respectively, the wavelength selection module needs to be controlled in the first control mode, and for better understanding, the following description is provided for a specific implementation process:

first, the control unit 540 turns on the optical path between the input port 503 and the input port 504 according to the instruction of the first control mode, so as to ensure that the multiple paths of first optical signals input by the input port 504 can be transmitted to the first optical filter 601.

Next, the control unit 540 loads a preset first voltage or a preset first current to the electro-optical phase shifter of the first optical filter 601 according to the indication of the first control mode. The first optical filter 601 filters out second optical signals having target wavelengths λ 1, λ 2, λ 3, and λ 4, respectively, from the plurality of first optical signals input via the input port 504. For example, the wavelengths of the multiple first optical signals input via the input port 504 are λ 1, λ 2, λ 3, λ 4 to λ M, and the first optical filter 601 obtains four second optical signals having the target wavelengths λ 1, λ 2, λ 3, and λ 4 from the M first optical signals. The first optical filter 601 is cascaded with the second optical filter 602, and then the first optical filter 601 can transmit the four paths of the second optical signals to the second optical filter 602.

Again, the control unit 540 loads a preset second voltage or a second current to the electro-optical phase shifter of the second optical filter 602 according to the indication of the first control mode. The second optical filter 602 can transmit the second optical signal having the target wavelengths λ 1 and λ 2 to the third optical filter 603, and the second optical filter 602 can also transmit the second optical signal having the target wavelengths λ 3 and λ 4 to the fourth optical filter 604.

Again, the control unit loads a preset third voltage or third current to the electro-optical phase shifter of the third optical filter 603 according to the indication of the first control mode. One interference arm of the third optical filter 603 transmits the second optical signal having the target wavelength λ 1 to the output port 521, and the other interference arm of the third optical filter 603 transmits the second optical signal having the target wavelength λ 2 to the output port 522.

Again, the control unit loads a preset fourth voltage or a preset fourth current to the electro-optical phase shifter of the fourth optical filter 604 according to the indication of the first control mode. One interference arm of the fourth optical filter 604 transmits the second optical signal having the target wavelength λ 3 to the output port 523, and the other interference arm of the fourth optical filter 604 transmits the second optical signal having the target wavelength λ 4 to the output port 524.

It should be clear that, in this embodiment, for convenience of understanding, an example is given by taking an example that each target output port outputs one second optical signal, in other examples, each output port may also output multiple second optical signals with different target wavelengths, and the number of wavelengths of the second optical signals output by the output ports of the wavelength selection module is not limited in this embodiment.

It can be seen that, in order to implement different combinations of wavelengths of the second optical signals output by different output ports, the filtering module shown in this embodiment may be implemented by configuring different control modes. The different control modes shown in this embodiment may indicate the on/off of the optical switch, and for example, may also indicate the magnitude of the voltage or current loaded by each optical filter. The control unit controls the wavelength selection module through different control modes to ensure that the same target output port outputs second optical signals with different wavelengths under the control of different control modes, so as to meet different routing requirements of service optical signals output by the optical transceiver connected with the target output port.

In other examples, the wavelength selection module may also control the filtering of the filtering module first and then control the on/off of the optical switch, so that the multiple paths of second optical signals output by the filtering module may be transmitted to the corresponding output ports via the optical paths conducted by the optical switches.

Alternatively, in other examples, the wavelength selection module may also include only the filtering module, and the second optical signal is transmitted to the target output port only through the filtering module.

Alternative Structure 2

The difference between the alternative structure 2 and the alternative structure 1 is that the structure of the filtering module shown in this structure is different, and the structure of the filtering module shown in this structure can be seen in fig. 7, where fig. 7 is a diagram illustrating a second embodiment structure of the filtering module provided in this application. The filtering module shown in this embodiment includes four optical filters, where the first optical filter includes a first micro-ring resonator waveguide 701 and a first transmission waveguide 702, the second optical filter includes a second micro-ring resonator waveguide 703 and a second transmission waveguide 704, the third optical filter includes a third micro-ring resonator waveguide 705 and a third transmission waveguide 706, and the fourth optical filter includes a fourth micro-ring resonator waveguide 707 and a fourth transmission waveguide 708. The first micro-ring resonator waveguide 701, the second micro-ring resonator waveguide 703, the third micro-ring resonator waveguide 705, and the fourth micro-ring resonator waveguide 707 are respectively connected to the control unit 540, and it should be clear that the description of the number of the optical filters included in the filtering module in this embodiment is an optional example and is not limited.

The first transmission waveguide 702 is shown in this example as being connected to a first output port 524, the second transmission waveguide 704 is connected to a second output port 523, the third transmission waveguide 706 is connected to the first output port 522, and the fourth transmission waveguide 708 is connected to the first output port 521.

The control unit 540 shown in this embodiment may configure an allocation list, which may be shown in table 3 as follows:

TABLE 3

The allocation list is used to indicate that if the output port 521, the output port 522, the output port 523, and the output port 524 are required to output the second optical signals with the target wavelengths λ K1, λ K2, λ K3, and λ K4, respectively, a second control mode needs to be performed on the wavelength selection module, and for better understanding, the following specific implementation process is described below:

first, a first micro-ring resonator waveguide 701, a second micro-ring resonator waveguide 703, a third micro-ring resonator waveguide 705, and a fourth micro-ring resonator waveguide 707 are arranged near a position where a plurality of first optical signals are input via the input port 504. A plurality of first optical signals input through the input port 504 can be coupled into the first micro-ring resonator waveguide 701, the second micro-ring resonator waveguide 703, the third micro-ring resonator waveguide 705, and the fourth micro-ring resonator waveguide 707, respectively.

Next, the control unit 540 loads a preset fifth voltage or a preset fifth current on the first micro-ring resonator waveguide 701 according to the instruction of the second control mode, so that an optical interference effect occurs on the first optical signal with the target wavelength λ k4, and when an optical path of the first optical signal with the wavelength λ k4 back and forth in the first micro-ring resonator waveguide 701 is equal to an integral multiple of the wavelength λ k4, a resonance phenomenon occurs, so that the second optical signal with the target wavelength λ 4 is coupled into the first transmission waveguide 702 during transmission of the first micro-ring resonator waveguide 701, and the second optical signal with the wavelength λ k4 is transmitted to the output port 524. By analogy, the control unit 540 loads a preset sixth voltage or a preset sixth current to the second micro-ring resonator waveguide 703 according to an instruction of the second control mode, so that the first optical signal with the target wavelength λ k3 is transmitted to the output port 523. The control unit loads a preset seventh voltage or a preset seventh current to the third micro-ring resonator waveguide 705 according to the indication of the second control mode, so that the first optical signal with the target wavelength λ k2 is transmitted to the output port 522. The control unit loads a preset eighth voltage or eighth current to the fourth micro-ring resonator waveguide 707 according to an instruction of the second control mode, so that the first optical signal having the target wavelength λ K1 is transmitted to the output port 521.

It should be clear that, in this embodiment, for convenience of understanding, an example is given by taking an example that each target output port outputs one second optical signal, in other examples, each output port may also output multiple second optical signals with different wavelengths, and the number of wavelengths of the second optical signals output by the output ports of the wavelength selection module is not limited in this embodiment.

It can be seen that, in order to implement different combinations of wavelengths of the second optical signals output by different output ports, the filtering module shown in this embodiment may be implemented by configuring different control modes, where the different control modes shown in this embodiment may indicate the magnitude of the voltage or the current loaded on each micro-ring resonator waveguide. The control unit controls the wavelength selection module through different control modes to ensure that the same target output port outputs second optical signals with different target wavelengths under the control of different control modes, so as to meet different routing requirements of service optical signals output by the optical transceiver connected with the target output port.

Optional Structure 3

The difference between the optional structure 3 and the above optional structure is that the structure of the filtering module shown in this structure is different, and the filtering module shown in this example includes a filtering module and an optical distribution module, and the description of the filtering module shown in this example is please refer to structure 2 in detail, which is not described in detail specifically, it is known that the filtering module can filter a second optical signal with a target wavelength from multiple paths of first optical signals input from the input port. For example, the filtering module can filter out the second optical signals having the target wavelengths λ 1, λ 2, λ 3, and λ 4 from the M first optical signals from the input port. The optical distribution module is used for enabling the multiple paths of second optical signals filtered by the filtering module to be respectively transmitted to the corresponding target output ports. For example, the optical distribution module can transmit the second optical signals of the target wavelengths λ 1, λ 2, λ 3, and λ 4 to the output port 521, the output port 522, the output port 523, and the output port 524, respectively. For another example, the optical distribution module can transmit the second optical signals with the target wavelengths λ 1, λ 2, λ 3, and λ 4 to the output port 524, the output port 523, the output port 522, and the output port 521, respectively, and the specific distribution manner of the optical distribution module is determined according to the routing requirement of the traffic optical signal output by the first optical transceiver connected to each output port. The optical distribution module shown in this example may include one or more MZIs, and as for a description of an implementation process of the MZIs, as shown in the above optional structure 1, it can be known that, based on the MZIs included in the optical distribution module, each second optical signal can be transmitted to a corresponding target output port according to a routing requirement.

The following describes an application scenario of the optical network shown in this embodiment:

if the optical network shown in this embodiment is applied to an AI training scenario, performing AI training requires iterative operations of multiple calculation steps, for example, as shown in fig. 8, where fig. 8 is an exemplary diagram of an application scenario of the optical network provided in the present application. P0 to P7 shown in fig. 8 represent 8 computing nodes for executing a computing task. Step one, step two and step three represent three steps that need to be executed to execute the computing task. FIG. 8 is a diagram illustrating the communication relationships between different computing nodes in performing different steps. Taking the computing node P0 as an example, the following table 4 can be referred to as a routing table for implementing the present scenario:

TABLE 4

The first optical transceiver P0 shown in table 4 is the first optical transceiver connected to the computing node P0. The second optical transceiver P1 is the second optical transceiver connected to the computing node P1, and so on, and the second optical transceiver P4 is the second optical transceiver connected to the computing node P4.

For example, in the process of executing step one, the routing requirement corresponding to the computing node P0 is that the service electrical signal output by the computing node P0 needs to be transmitted to the computing node P1. To this end, the computing node P0 transmits the traffic electrical signal to the first optical transceiver P0. The first optical transceiver P0 modulates the service electrical signal on a second optical signal having a first wavelength to transmit the service optical signal having the first wavelength to the optical switching module. The optical switch module transmits the service optical signal to the second optical transceiver P1, the second optical transceiver P1 demodulates the service optical signal to generate a service electrical signal, and the service electrical signal is transmitted to the computing node P1 by the second optical transceiver P1, so that the communication between the computing node P0 and the computing node P1 is realized in the first step.

In the process of executing step two, the routing requirement corresponding to the computing node P0 is that the service electrical signal output by the computing node P0 needs to be transmitted to the computing node P2. To this end, the computing node P0 transmits the traffic electrical signal to the first optical transceiver P0. The first optical transceiver P0 modulates the service electrical signal on a second optical signal having a second wavelength to transmit the service optical signal having the second wavelength to the optical switching module. The optical switch module transmits the service optical signal to the second optical transceiver P2, the second optical transceiver P2 demodulates the service optical signal to obtain a service electrical signal, and the service electrical signal is transmitted to the computing node P2 by the second optical transceiver P2, so as to implement the communication between the computing node P0 and the computing node P2 in the step one.

Therefore, when a computing task is executed, if two different computing nodes need to perform interactive communication, the interactive communication can be realized only by changing the wavelength of the optical signal without changing the architecture of the optical network and the architecture of any optical device included in the optical network. If the wavelength of the second optical signal is changed from the first wavelength to the second wavelength, the service optical signal from the first optical transceiver P0 can be changed from being transmitted to the second optical transceiver P1 to being transmitted to the second optical transceiver P2.

In the optical network shown in this embodiment, data interaction is performed between the first optical transceiver and the second optical transceiver through the optical switch module, and thus, data interaction is directly performed between the first optical transceiver and the second optical transceiver through optical signals without performing electro-optical conversion, and the time delay of data interaction between the two optical transceivers is effectively reduced. Moreover, the port of the optical switching module has no limit on the bandwidth, and the optical switching module can transmit an optical signal with a higher rate, so that the optical network shown in this embodiment can provide data interaction with a large bandwidth and a low time delay.

When the optical network performs different computing tasks, the first optical transceiver may be caused to transmit the traffic optical signal to a different second optical transceiver by merely requiring the wavelength selection module to change the wavelength of the second optical signal transmitted to the first optical transceiver. Based on different calculation tasks, the first optical transceiver does not need to change the network architecture of the optical network in the process of carrying out data interaction with different second optical transceivers, and networking cost is reduced.

The optical network can uniformly send M paths of first optical signals to the wavelength selection module through the light source module, the wavelength selection module is responsible for transmitting second optical signals with corresponding target wavelengths according to routing requirements of the service optical signals, wavelength combinations of the M paths of first optical signals output by the light source module are not required to be changed when calculation tasks are executed every time, the light source module is not required to be changed, networking cost and time delay are reduced, and the use efficiency of wavelength resources of the M paths of first optical signals output by the light source module is improved.

The optical network does not need to independently configure a laser with adjustable wavelength at each first optical transceiver, and the cost of the first optical transceivers is reduced. The first optical transceiver directly modulates according to the second optical signal from the wavelength selection module, wavelength tuning by the first optical transceiver is not needed, and network time delay is reduced.

The wavelength selection module allocates wavelengths to the first optical transceivers, so that the same output port of the same optical switch module can be ensured, and only service optical signals from one first optical transceiver are received. Then, the service optical signals from different first optical transceivers will not be transmitted to the same output port of the optical switch module, thereby avoiding network congestion.

Example two

Based on the description of the structure of the network device shown in the first embodiment, this embodiment is described with reference to fig. 9, where fig. 9 is a flowchart of steps of a first embodiment of a transmission method for a service optical signal provided in the present application:

step 901, the light source module transmits M first optical signals to the wavelength selection module.

For a description of the structures of the light source module and the wavelength selection module, please refer to embodiment one in detail, which is not described in detail in this embodiment. In this embodiment, a specific manner of outputting M paths of first optical signals by the light source module may be shown in the following optional manner:

mode 1

In the light source module shown in this example, the wavelength of each of the M first optical signals that have been configured to be output in advance, and the output port of the light source module through which each of the first optical signals passes. For example, the wavelengths of the M first optical signals are λ 1, λ 2, λ 3, λ 4 to λ M, respectively, and then the wavelengths of the M first optical signals transmitted to the wavelength selection module by the light source module each time are λ 1, λ 2, λ 3, λ 4 to λ M. The M paths of first optical signals shown in this embodiment may be output through M different output ports of the light source module, or the M paths of first optical signals may be output through i different output ports of the light source module, where i is any positive integer greater than or equal to 1 and smaller than M, and a specific value is not limited in this embodiment.

Mode 2

The light source module determines the wavelengths of the M paths of output first optical signals under the control of the first control unit, where the first control unit shown in this embodiment may be independently disposed inside the network device, or the first control unit is one or more computing nodes included in the network device, for a specific description, refer to the description in the first embodiment, and details are not repeated. As shown in fig. 10, wherein fig. 10 is a diagram illustrating a partial structure of a fourth embodiment of a network device provided in the present application. In this embodiment, the first control unit 1001 is disposed inside the network device independently.

The first control unit shown in this example may determine the wavelengths of the M first optical signals according to the routing requirements of the traffic optical signals output by the respective first optical transceivers. For example, if a target wavelength required by a routing requirement of a service optical signal output by one first transceiver is λ K, the first control unit controls the M first optical signals output by the light source module to include a first optical signal having the target wavelength λ K. For a detailed description of the routing requirement, please refer to the embodiment one, which is not described herein.

Step 902, the first control unit obtains a plurality of allocation lists.

The first control unit shown in this embodiment may configure a plurality of allocation lists in advance, where different allocation lists are used to indicate different combinations of the wavelengths of the second optical signals output by the output ports of the wavelength selection modules. It is appreciated that different allocation lists are used to satisfy different routing requirements of the first optical transceiver. For example, referring to two different allocation lists shown in table 2 and table 3 of the first embodiment, in the allocation list shown in table 2, the output port 521, the output port 522, the output port 523, and the output port 524 included in the wavelength selection module output the second optical signal having the target wavelengths λ 1, λ 2, λ 3, and λ 4, respectively. In the allocation list shown in table 3, the output port 521, the output port 522, the output port 523, and the output port 524 included in the wavelength selection module respectively output the second optical signals with the target wavelengths λ K1, λ K2, λ K3, and λ K4, and specific descriptions may be referred to in the first embodiment and are not repeated herein.

The present embodiment does not limit the execution sequence between step 901 and step 902.

Step 903, the first control unit obtains the routing requirement.

The first control unit shown in this embodiment obtains the routing requirement of the optical signal output by each first optical transceiver, and for the description of the routing requirement, please refer to the description of the first embodiment, which is not described herein.

The execution timing between step 902 and step 903 is not limited in this embodiment.

Step 904, the first control unit obtains a current allocation list corresponding to the routing requirement.

The first control unit shown in this embodiment acquires a current allocation list from a plurality of allocation lists that have been configured. The current distribution list can satisfy the routing requirement of the optical signals output by each first optical transceiver. For example, as shown in fig. 5, the routing requirements of the service optical signals of the first optical transceiver 531, the first optical transceiver 532, the first optical transceiver 533, and the first optical transceiver 534 require the second optical signals with the wavelengths λ 1, λ 2, λ 3, and λ 4, respectively. The first control unit determines that a current allocation list satisfying the routing requirement can be acquired. The current allocation list includes a target output port connected to each first optical transceiver and a corresponding target wavelength. It can be seen that the current distribution list corresponding to the routing requirement is table 2 shown in the first embodiment, and for specific description, reference is made to the description of the first embodiment, which is not described in detail. Under the condition that the wavelength selection module controls the control mode indicated by the current allocation list, the wavelength selection module can ensure that the target output port (i.e., the output port 521, the output port 522, the output port 523, and the output port 524) of the wavelength selection module outputs the second optical signal with the wavelengths λ 1, λ 2, λ 3, and λ 4, respectively, so as to meet the routing requirement of each first optical transceiver, thereby ensuring that each first optical transceiver can successfully transmit the service optical signal to the corresponding second optical transceiver.

Step 905, the first control unit sends the current allocation list to the wavelength selection module.

In this embodiment, when the first control unit acquires the current allocation list, the first control unit sends the acquired current allocation list to the wavelength selection module, and specifically, as shown in fig. 10, the first control unit 1001 sends the current allocation list to the second control unit 1002 included in the wavelength selection module.

Step 906, the wavelength selection module transmits the second optical signal to the first optical transceiver

Specifically, the wavelength selection module shown in this embodiment controls the wavelength selection module according to the current allocation list, so as to transmit the second optical signal with the target wavelength to the first optical transceiver via the target output port.

It can be seen that, if the second optical signal indicated by the current distribution list is K channels and the number of the first optical transceivers is N, the second control unit controls the second optical signal according to the current distribution list to be able to transmit the K channels of second optical signals to the N first optical transceivers. The K paths of second optical signals are part or all of the M paths of first optical signals, and the N first optical transceivers are part or all of a plurality of optical transceivers included in the network device. And K is a positive integer greater than or equal to N, for example, if K is equal to N, it indicates that each first optical transceiver receives only one path of second optical signal, and if K is greater than N, it indicates that at least one first optical transceiver can receive two or more paths of second optical signals.

How the second control unit included in the wavelength selection module performs control according to the current allocation list shown in table 2, for example, refer to the control process of the control unit shown in the first embodiment, which is not described in detail herein. It can be seen that the second control unit shown in this embodiment controls the wavelength selection module according to the current allocation list shown in table 2 to ensure that the wavelengths of the second optical signals respectively output by the target output ports (i.e., the

output ports

521, 522, 523, and 524) are λ 1, λ 2, λ 3, and λ 4. Further, the first optical transceivers (i.e., the first optical transceiver 531, the first optical transceiver 532, the first optical transceiver 533, and the first optical transceiver 534) connected to the target output ports receive the second optical signals having the target wavelengths λ 1, λ 2, λ 3, and λ 4, respectively.

In this embodiment, the second control unit 1002 located in the wavelength selection module is used to control the wavelength selection module as an example, in other examples, the first control unit may also directly control the wavelength selection module, and is not limited in this embodiment.

Step 907, the first optical transceiver modulates the service electrical signal on each path of the second optical signal to output a service optical signal.

It can be known that N first optical transceivers included in the network device can modulate the K paths of second optical signals with the service electrical signal to output the K paths of service optical signals, and for a description of a specific process of modulating the K paths of second optical signals by the first optical transceivers, please refer to embodiment one for details, which is not described in detail in this embodiment.

Step 908, the first optical transceiver transmits the service optical signal to the optical switch component.

The optical switching assembly shown in this embodiment may include one or more optical switching modules, and for specific description of the optical switching modules, please refer to the description in the first embodiment, which is not repeated herein. For example, as shown in fig. 1, the optical switching assembly includes

optical switching modules

111, 112, 113, and 114. The optical switch module can receive K paths of service optical signals from the N first optical transceivers, and then the optical switch module can transmit the K paths of service optical signals to the corresponding second optical transceivers according to the wavelength of each path of service optical signal. It can be known that each second optical transceiver can receive one or multiple service optical signals, and for a specific description of the second optical transceiver, please refer to the description in the first embodiment, which is not repeated herein.

The optical switching component transmits the service optical signal to the second optical transceiver in step 909.

As shown in the first embodiment, the optical switch modules are wavelength sensitive optical devices, that is, each optical switch module crosses according to the wavelength of the second optical signal to transmit to the corresponding second optical transceiver.

In this embodiment, when the second optical transceiver receives the service optical signal, the second optical transceiver may demodulate the service optical signal to obtain a service electrical signal, and transmit the service electrical signal to a computing node connected to the second optical transceiver, where the computing node may perform corresponding processing according to the service electrical signal.

For a description of the beneficial effects shown in this embodiment, please refer to embodiment one, which will not be described in detail.

EXAMPLE III

The difference between the present embodiment and the second embodiment is that the main body of acquiring the current allocation list is different, and an execution process of the transmission method of the service optical signal shown in the present embodiment can be seen in fig. 11, where fig. 11 is a flowchart of steps of the second embodiment of the transmission method of the service optical signal provided in the present application.

Step 1101, the light source module transmits M paths of first optical signals to the wavelength selection module.

For a description of the execution process of step 1101 shown in this embodiment, please refer to step 901 shown in embodiment two, and details of the execution process are not repeated.

Step 1102, wavelength selection module obtains a plurality of allocation lists.

The third control unit included in the wavelength selection module shown in this embodiment obtains a plurality of allocation lists, where please refer to the description of the position of the second control unit shown in the second embodiment for the description of the specific position of the third control unit, which is not described in detail herein. Please refer to the description of the process of acquiring the multiple allocation lists by the first control unit in step 902 in the second embodiment, which is not described in detail in this embodiment.

Step 1103, the wavelength selection module obtains the routing requirement.

Please refer to the description of the process of acquiring the routing requirement by the first control unit in step 903 in embodiment two, which is not described in detail herein.

Step 1104, the wavelength selection module obtains a current allocation list corresponding to the routing requirement.

For details, please refer to the description of the process of the first control unit obtaining the current allocation list corresponding to the routing requirement in step 904 in the second embodiment, which is not described in detail herein.

Step 1105, the wavelength selection module transmits a second optical signal to the first optical transceiver.

Specifically, the wavelength selection module controls the wavelength selection module according to the current allocation list to transmit the second optical signal with the target wavelength to the first transceiver via the target output port.

For a description of a process of controlling the wavelength selection module by the wavelength selection module according to the current allocation list, please refer to the description of the process of controlling the wavelength selection module shown in step 906 of embodiment two, which is not described in detail herein.

In step 1106, the first optical transceiver modulates the service electrical signal on each of the second optical signals to output a service optical signal.

Step 1107, the first optical transceiver transmits the service optical signal to the optical switch component.

Step 1108, the optical switch component transmits the service optical signal to the second optical transceiver.

For the description of the execution process of steps 1106 to 1108 shown in this embodiment, please refer to the description of the execution process of steps 907 to 909 shown in embodiment two, which is not repeated herein.

For a description of the beneficial effects shown in this embodiment, please refer to embodiment one, which is not repeated herein.

Example four

In both the second embodiment and the third embodiment, the network device needs to dynamically control the wavelength selection module according to the routing requirements of the first optical transceiver, and thus, if the routing requirements of the first optical transceiver are different, the wavelength selection module is controlled based on different allocation lists. The wavelength selection module shown in this embodiment performs preset control, and the wavelength selection module can transmit a second optical signal with the same wavelength to the same first optical transceiver each time, and an implementation process of the transmission method for the service optical signal shown in this embodiment is described below with reference to fig. 12, where fig. 12 is a flowchart of a third embodiment step of the transmission method for the service optical signal provided in this application.

Step 1201, the light source module transmits M paths of first optical signals to the wavelength selection module.

For a specific execution process of step 1201 shown in this embodiment, please refer to step 901 shown in embodiment two, which is not described in detail.

Step 1202, the wavelength selection module obtains a preset allocation list.

The third control unit included in the wavelength selection module shown in this embodiment has configured a preset allocation list in advance, where the preset allocation list can meet the routing requirement of the service optical signal of each first optical transceiver. For a description of the third control unit included in the wavelength selection module, please refer to the description shown in the third embodiment, which is not described in detail. For a description of the preset allocation list, please refer to the description of the allocation list shown in the first embodiment, which is not repeated herein. The wavelength selection module shown in this embodiment can perform fixed control on the wavelength selection module based on the preset allocation list, so as to ensure that the same target output port of the wavelength selection module always outputs the second optical signal with the same target wavelength. And further ensuring that the first optical transceiver connected with the target output port in the network equipment can always receive the second optical signal with the same wavelength. For example, the target wavelength of the second optical signal received by the same first optical transceiver is always λ K.

Step 1203, the wavelength selection module transmits a second optical signal to the first optical transceiver.

Specifically, the wavelength selection module controls the wavelength selection module according to a preset allocation list so as to transmit the second optical signal with the target wavelength to the first optical transceiver through the target output port.

Please refer to the process of controlling the wavelength selection module according to the current allocation list by the wavelength selection module in step 1005 in the third embodiment in the execution process of step 1203 in this embodiment, which is not described in detail herein.

In step 1204, the first optical transceiver modulates the service electrical signal on each path of the second optical signal to output a service optical signal.

Step 1205, the first optical transceiver transmits the service optical signal to the optical switch component.

In step 1206, the optical switching component transmits the service optical signal to the second optical transceiver.

For a description of the execution process from step 1204 to step 1206 shown in this embodiment, please refer to the description of the process from step 1006 to step 1008 shown in the third embodiment in detail, which is not repeated herein.

It can be known that, in the transmission method shown in this embodiment, data interaction is performed between the first optical transceiver and the second optical transceiver through the optical switch module, and thus, data interaction is directly performed between the first optical transceiver and the second optical transceiver through optical signals without performing electro-optical conversion, and time delay of data interaction between the two optical transceivers is effectively reduced. Moreover, the port of the optical switching module has no limit on bandwidth, and the optical switching module can transmit an optical signal with a higher rate, so that the optical network shown in this embodiment can provide data interaction with large bandwidth and low time delay.

The optical network can uniformly send M paths of first optical signals to the wavelength selection module through the light source module, the wavelength selection module is responsible for transmitting second optical signals with corresponding target wavelengths according to the preset distribution list, the action of inquiring the current distribution list is not required to be executed when a calculation task is executed every time, and the efficiency of optical signal transmission is improved.

The above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The transmission method of the business optical signal is applied to network equipment, and the network equipment comprises a light source module, wherein the light source module is connected with a wavelength selection module, and the wavelength selection module is connected with a plurality of optical transceivers;

the light source module transmits M paths of first optical signals to the wavelength selection module, wherein M is a positive integer greater than 1;

the wavelength selection module transmits K paths of second optical signals to N first optical transceivers, wherein K is a positive integer smaller than or equal to M, the N first optical transceivers are at least part of the plurality of optical transceivers, and K is a positive integer larger than or equal to N;

the N first optical transceivers modulate a service electrical signal on each path of the second optical signal to output K paths of service optical signals.

2. The transmission method according to claim 1, wherein the wavelength selection module includes at least one input port connected to the light source module and a plurality of output ports connected to the first optical transceivers in a one-to-one correspondence.

3. The transmission method according to claim 1 or 2, wherein the wavelength selection module transmitting the K second optical signals to the N first optical transceivers comprises:

the wavelength selection module transmits the second optical signal with a target wavelength to a target output port of the wavelength selection module, the target wavelength is determined according to a routing requirement of the service optical signal, and the target output port and the target wavelength have a corresponding relationship.

4. The transmission method according to claim 1 or 2, wherein the wavelength selection module transmitting the K second optical signals to the N first optical transceivers includes:

the wavelength selection module acquires a current distribution list, wherein the current distribution list comprises a corresponding relation between a target wavelength and a target output port, the target wavelength is a wavelength transmitted to the wavelength selection module, and the target output port is an output port which is included in the wavelength selection module and is connected with the first optical transceiver;

the wavelength selection module transmits the second optical signal having the target wavelength to the target output port according to the current allocation list.

5. The transmission method according to claim 4, wherein the network device comprises a control unit connected to the wavelength selection module, the method further comprising:

the control unit acquires a plurality of allocation lists;

the control unit acquires routing requirements, wherein the routing requirements comprise a source node and a sink node of the service optical signal, the source node is connected with the first optical transceiver, and the sink node is connected with the second optical transceiver;

the control unit acquires the current distribution list corresponding to the routing requirement, wherein the service optical signal with the target wavelength output by the first optical transceiver is used for being transmitted to the second optical transceiver through an optical switching module;

the control unit sends the current allocation list to the wavelength selection module.

6. The transmission method according to claim 4, wherein the wavelength selection module obtaining the current allocation list comprises:

the wavelength selection module acquires a plurality of distribution lists;

the wavelength selection module acquires routing requirements, wherein the routing requirements comprise a source node and a sink node of the service optical signal, the source node is connected with the first optical transceiver, and the sink node is connected with a second optical transceiver;

the wavelength selection module obtains the current distribution list corresponding to the routing requirement, wherein the service optical signal with the target wavelength output by the first optical transceiver is used for being transmitted to the second optical transceiver through an optical switch module.

7. The transmission method according to any one of claims 4 to 6, wherein the wavelength selection module transmitting the second optical signal having the target wavelength to the target output port according to the current allocation list comprises:

and the wavelength selection module switches on an optical path between a target input port and the target output port of the wavelength selection module according to the current allocation list, wherein the target input port is an input port for inputting the first optical signal with the target wavelength.

8. The transmission method according to any one of claims 1 to 7, wherein the wavelength selection module further includes at least one optical filter, and the wavelength selection module transmitting the K second optical signals to the N first optical transceivers includes:

the wavelength selection module filters the K paths of second optical signals from the M paths of first optical signals through the at least one optical filter.

9. The transmission method according to any one of claims 3 to 7, wherein the network device includes a control unit connected to the wavelength selection module, and the transmitting, by the light source module, the M first optical signals to the wavelength selection module includes:

the control unit controls the light source module to output the first optical signal having the target wavelength.

10. The transmission method according to any one of claims 1 to 9, wherein the first optical transceiver receives at least two paths of second optical signals having different wavelengths from each other from the K paths of second optical signals.

11. A network device, comprising a light source module, wherein the light source module is connected to a wavelength selection module, and the wavelength selection module is connected to a plurality of optical transceivers;

the light source module is used for transmitting M paths of first optical signals to the wavelength selection module, wherein M is a positive integer greater than 1;

the wavelength selection module is configured to transmit K second optical signals to N first optical transceivers, where K is a positive integer smaller than or equal to M, the N first optical transceivers are at least some of the optical transceivers, and K is a positive integer greater than or equal to N;

the N first optical transceivers are used for modulating a service electrical signal on each path of the second optical signal to output K paths of service optical signals.

12. The network device of claim 11, wherein the wavelength selection module comprises at least one input port and a plurality of output ports, the at least one input port is connected to the light source module, and the plurality of output ports are connected to the plurality of first optical transceivers in a one-to-one correspondence.

13. The network device according to claim 11 or 12, wherein the wavelength selection module is specifically configured to transmit the second optical signal with a target wavelength to a target output port of the wavelength selection module, the target wavelength is determined according to a routing requirement of the traffic optical signal, and the target output port and the target wavelength have a corresponding relationship.

14. The network device according to claim 11 or 12, wherein the wavelength selection module is specifically configured to:

obtaining a current distribution list, where the current distribution list includes a target wavelength and a corresponding relationship between target output ports, the target wavelength is a wavelength transmitted to the wavelength selection module, and the target output port is an output port included in the wavelength selection module and connected to the first optical transceiver;

transmitting the second optical signal having the target wavelength to the target output port according to the current allocation list.

15. The network device of claim 14, wherein the network device comprises a control unit coupled to the wavelength selection module, the control unit configured to:

acquiring a plurality of distribution lists;

obtaining routing requirements, where the routing requirements include a source node and a sink node of the service optical signal, the source node is connected to the first optical transceiver, and the sink node is connected to a second optical transceiver;

obtaining the current distribution list corresponding to the routing requirement, wherein the service optical signal with the target wavelength output by the first optical transceiver is used for being transmitted to the second optical transceiver through an optical switching module;

and sending the current allocation list to the wavelength selection module.

16. The network device of claim 14, wherein the wavelength selection module is specifically configured to:

acquiring a plurality of distribution lists;

obtaining routing requirements, wherein the routing requirements include a source node and a sink node of the service optical signal, the source node is connected with the first optical transceiver, and the sink node is connected with a second optical transceiver;

obtaining the current distribution list corresponding to the routing requirement, wherein the service optical signal with the target wavelength output by the first optical transceiver is used for being transmitted to the second optical transceiver through an optical switch module.

17. The network device according to any one of claims 14 to 16, wherein the wavelength selection module is specifically configured to turn on an optical path between a target input port of the wavelength selection module and the target output port according to the current allocation list, where the target input port is an input port for inputting the first optical signal having the target wavelength.

18. The network device according to any one of claims 11 to 17, wherein the wavelength selection module further comprises at least one optical filter, and the wavelength selection module is specifically configured to filter the K second optical signals from the M first optical signals through the at least one optical filter.

19. The network device according to any of claims 13 to 17, wherein the network device comprises a control unit connected to the wavelength selection module, the control unit being configured to control the light source module to output the first optical signal having the target wavelength.

20. The network device according to any one of claims 11 to 19, wherein the first optical transceiver receives at least two paths of second optical signals with different wavelengths from each other from the K paths of second optical signals.

21. An optical network, characterized in that the optical network comprises a plurality of optical transceivers, wherein the plurality of optical transceivers comprises N first optical transceivers and at least one second optical transceiver, the N first optical transceivers and the at least one second optical transceiver are connected through at least one optical switch module, the N first optical transceivers are located in a network device, and the network device is as claimed in any one of claims 11 to 20;

the at least one optical switch module is configured to transmit the K traffic optical signals from the N first optical transceivers to the at least one second optical transceiver.

22. The optical network of claim 21, wherein the N first optical transceivers and the second optical transceiver are located in a same network device, or wherein the N first optical transceivers and the second optical transceiver are located in different network devices.