Optical cross interconnection equipment, system and communication method

Abstract

An optical cross interconnection device, system and communication method relate to the technical field of optical communication and are used for improving the application dimension of OXC. A wave band level optical switching module and a wavelength level optical switching module are deployed in optical cross interconnection equipment, the wave band optical switching module comprises a high-order port and a low-order port, the high-order port is used for connecting an input / output level optical module, and the low-order port is used for connecting the wavelength level optical switching module. According to the method, high-order and low-order hybrid scheduling of wave band signals is adopted, a high-order port is used for wave band level switching, and a low-order port is used for wavelength level switching. According to the invention, the optical scheduling of the wave band level can be realized, so that the problem that the number of optical fibers is large and the dimensionality cannot be improved due to wavelength connection is solved. In addition, wavelength-level exchange can be realized, and the method and the device can be suitable for large-dimension (or large-particle) exchange scenes.

Description

Technical Field

[0001] The present application relates to the field of optical communication technology, and in particular to an optical cross-connection device, system and communication method. Background Art

[0002] Optical networks are continuously developing and evolving towards large capacity, low latency, and intelligence. Optical switching technologies such as reconfigurable optical add-drop multiplexers (ROADM) and optical cross-connect (OXC) devices not only support the current commercial optical networks, but are also one of the key technologies for realizing the next generation of optical networks, and are gradually evolving from backbone networks to metropolitan area networks.

[0003] Currently, OXC equipment uses wavelength selective switches (WSS) as the basic unit to form a line board, and multiple line boards are interconnected through an optical backplane. The optical backplane controls the WSS to route according to wavelength-level particles, realizing wavelength-level all-optical scheduling between multiple lines.

[0004] However, due to the limitations of the optical complexity of WSS and the light switching angle, OXC cannot improve the application dimension. Summary of the invention

[0005] The embodiments of the present application provide an optical cross-connection device, system and communication method to improve the application dimension of OXC.

[0006] In a first aspect, an embodiment of the present application provides an optical cross-connection device. The optical switching interconnection device includes multiple input-level optical modules, multiple waveband-level optical switching modules, multiple wavelength-level optical switching modules, and multiple output-level optical modules. Multiple waveband-level optical switching modules include high-order input ports and high-order output ports. At least one waveband-level optical switching module among the multiple waveband-level optical switching modules also includes a low-order input port and a low-order output port. The high-order input port is used to connect the input-level optical module, and the high-order output port is used to connect the output-level optical module. Each input-level module is respectively connected to multiple waveband-level optical switching modules, and different input-level optical switching modules are connected to the high-order input ports of different waveband-level optical switching modules. Each output-level optical module is respectively connected to multiple waveband-level optical switching modules, and different output-level optical switching modules are connected to the high-order output ports of different waveband-level optical switching modules. The low-order port is used to connect the wavelength-level optical switching module, that is, the low-order output port is connected to the input port of the wavelength-level optical switching module, and the low-order input port is used to connect the output port of the wavelength optical switching module.

[0007] Each input-level optical module is used to demultiplex an input optical signal into multiple wavelength band signals, and different wavelength band signals are input to different high-order input ports of wavelength band-level optical switching modules. Each wavelength band signal of the multiple wavelength band signals demultiplexed by the input-level optical module includes at least one wavelength of a service optical signal. The wavelengths of service optical signals included in different wavelength band signals among the multiple wavelength band signals do not overlap. After receiving the wavelength band signal from the high-order input port, the wavelength band-level optical switching module switches the wavelength band signal to the corresponding high-order output port or the corresponding low-order output port.

[0008] The embodiment of the present application realizes wavelength-level optical switching through a wavelength-level optical switching module, sets a high-order channel and a low-order channel on the wavelength-level optical switching module, and realizes wavelength-level optical switching through the low-order channel. That is, a high- and low-order mixed scheduling of wavelength signals is adopted, the high order is used for wavelength-level switching, and the low order is used for wavelength-level switching. Compared with the current routing based on wavelength-level granularity, the present application can realize wavelength-level optical scheduling and wavelength-level switching, which is suitable for switching scenarios with larger dimensions (or larger particles).

[0009] In a possible implementation, the optical cross-connection device includes N h input-level optical modules, q waveband-level optical switching modules, q1 wavelength-level optical switching modules, and N h Output-level optical modules; N h , q and q1 are all positive integers, q1 is less than or equal to q; the first input-level optical module includes an input port and M output ports, and the first input-level optical module is the N h Any one of the input-level optical modules; the M is a positive integer greater than or equal to q; each of the q waveband-level optical switching modules includes N h high-order input ports and N h high-order output ports, each of the q1 waveband-level optical switching modules also includes N L low-order input ports and N L low-order input ports, each of the q1 wavelength-level optical switching modules includes N l ' input ports and N l 'output port; the first output stage optical module comprises M input ports and an output port, the first output stage optical module is the N h Any one of the output-level optical modules;

[0010] N of each of the q waveband-level optical switching modules h The N high-order input ports are connected to the h The output ports of the input-level optical modules are connected one by one; each of the wavelength-band-level optical switching modules has N hHigh-order output ports and N h The input ports of the output-level optical modules are connected one-to-one; the q1 wavelength-level switching modules correspond one-to-one to the q1 wavelength-band-level optical switching modules;

[0011] q1 wavelength-level optical switching modules N in each wavelength-level optical switching module l low-order input ports and N in a wavelength-level optical switching module l The output ports are connected one by one, and different wavelength-level optical switching modules are connected to different wavelength-level optical switching modules. l The low-order output ports and the N l The input ports are connected one by one; N l Less than or equal to N l ',N l Less than or equal to N L ;

[0012] The first input-level optical module is used to demultiplex the received optical signal into at least one wavelength band signal, and couple different wavelength band signals in the at least one wavelength band signal to high-order input ports of different wavelength band-level optical switching modules; each wavelength band signal in the at least one wavelength band signal includes a service optical signal of at least one wavelength; and the wavelengths of the service optical signals included in different wavelength band signals do not overlap;

[0013] A first waveband-level optical switching module, used for switching the waveband signal input from the first high-order input port to the first high-order output port or the first low-order output port; the first waveband-level optical switching module is any one of the q1 waveband-level optical switching modules; the first high-order input port is any high-order input port of the first waveband-level optical switching module; the first wavelength-level optical switching module is connected to the first waveband-level optical switching module;

[0014] The first wavelength-level optical switching module is used to switch the wavelength-band signal from the first low-order output port to at least two low-order input ports of the first wavelength-level optical switching module;

[0015] The first waveband-level optical switching module is further used to switch the waveband signal received from the first low-order input port to the second high-order output port; the first low-order input port is any one of the at least two low-order output ports;

[0016] The first output-level optical module is used to multiplex the received multiple wavelength band signals into one optical signal and then send it out. The multiple wavelength band signals received by the first output-level optical module include at least one wavelength band signal from at least one wavelength band level optical switching module.

[0017] In a possible implementation, each module may adopt an orthogonal architecture for port interconnection to achieve densely packed interfaces and high integration.

[0018] In a possible implementation, the optical cross-connection device in the embodiment of the present application includes multiple slots. Multiple input-level optical modules and / or multiple output-level optical modules can be deployed on a single board. Each waveband-level optical switching module corresponds to a single board, and different waveband-level optical switching modules can be inserted into different slots corresponding to different single boards. The embodiment of the present application can adjust or update the required switching dimensions by changing the dimensions of the modules inserted into different slots.

[0019] The optical signal interaction between different slots can be realized through the optical connection device. The slot and the optical connection device can be connected through a high-density optical connector. Optionally, the optical connection device can be an optical backplane, an optical fiber box, or other components, which are not specifically limited here.

[0020] In a possible implementation, the q wavelength-level optical switching modules correspond one-to-one to q wavelength planes; different wavelength-band signals belonging to the same wavelength plane come from different input-level optical modules, and the wavelengths of the service optical signals included in the different wavelength-band signals belonging to the same wavelength plane belong to the same wavelength band.

[0021] In the embodiment of the present application, a waveband-level optical switching module corresponds to a waveband plane. For different wavelength-level optical switching modules, it is only necessary to have the switching capability between the wavelengths included in the waveband corresponding to the waveband plane, which can improve the applicability. In addition, after the optical switching between the wavelength-level optical switching modules, the wavelengths of the multiple service optical signals included in the waveband signal output by each port are all different.

[0022] In a possible implementation, the first wavelength-level optical switching module includes t1 wavelength-level optical switching sub-modules, the first wavelength-level optical switching sub-module includes K1 input ports and K1 output ports, the t1 wavelength-level optical switching sub-modules in the first wavelength-level optical switching module are respectively connected to the first waveband-level optical switching module, t1 is a positive integer, t1*K1=N l '.

[0023] The above solution can reduce the performance requirements on the wavelength-level optical switching modules by configuring multiple wavelength-level optical switching submodules on each wavelength band plane.

[0024] In a possible implementation, t1*K1 is greater than N l, the p output ports in the first wavelength-level optical switching submodule are used as drop-wave ports, and the drop-wave ports are used to output service optical signals of a single wavelength, and the p input ports in the wavelength-level optical switching submodule are used as add-wave ports, and the add-wave ports are used to receive service optical signals of a single wavelength; p = K1-N l / t1.

[0025] This application supports wavelength-level wave addition and drop.

[0026] In a possible implementation, the second wavelength-level optical switching module includes t2 wavelength-level optical switching sub-modules, the second wavelength-level optical switching sub-module includes K2 input ports and K2 output ports, the second wavelength-level optical switching module is a wavelength-level optical switching module among the q1 wavelength-level optical switching modules that is connected to the second wavelength-level optical switching module; the second wavelength-level optical switching module is any wavelength-level optical switching module among the q1 wavelength-level optical switching modules except the first wavelength-level optical switching module, the t2 wavelength-level optical switching sub-modules in the second wavelength-level optical switching module are respectively connected to the second wavelength-level optical switching module, t2 is a positive integer, t2*K2=N l '.

[0027] In the present application, the specifications and quantities of wavelength-level optical switching submodules included in different wavelength-level optical switching modules may be different and may be flexibly configured according to requirements.

[0028] In a possible implementation manner, the wavelength-level optical switching submodule is a wavelength selective switch WSS.

[0029] In a possible implementation, the N L Greater than N l The device also includes: q*q2 wave dropping modules and q*q2 wave adding modules, q2=N L -N l ;

[0030] The q2 low-order input ports of each of the q1 waveband-level optical switching modules are connected to the q2 wave modules in a one-to-one correspondence, and different waveband-level optical switching modules are connected to different wave modules; the q2 low-order output ports of each of the q1 waveband-level optical switching modules are connected to the q2 wave modules in a one-to-one correspondence, and different waveband-level optical switching modules are connected to different wave modules;

[0031] The first waveband drop module among the q*q2 waveband drop modules is connected to the second low-order output port of the first waveband-level optical switching module, and is used to output the waveband signal from the second low-order output port including a service optical signal of at least one wavelength;

[0032] The first wavelet adder module among the q*q2 wavelet adder modules is connected to the second low-order input port of the first waveband-level optical switching module, and is used for multiplexing the received service optical signals of multiple wavelengths into one waveband signal and then outputting it to the second low-order input port;

[0033] The first waveband-level optical switching module is further used to switch the waveband signal received from the second low-order input port to a second high-order output port corresponding to the second low-order input port for output.

[0034] The embodiment of the present application can support up and down waves at the waveband level.

[0035] In a possible implementation, M is greater than q, and the device further includes N h *(Mq) wave module and N h *(Mq) wave modules;

[0036] The N h The Mq output ports of each input-level optical module in the N input-level optical modules are used as drop-wave ports, and the Mq drop-wave ports are connected to the Mq drop-wave modules in a one-to-one correspondence; the first input-level optical module is also used to output the first waveband signal in the at least one waveband signal to the second drop-wave module; the second drop-wave module is the N h *One of (Mq) down-wave modules;

[0037] The N h The Mq input ports of the first output-level optical module in the output-level optical modules are used as add-on ports, and the Mq add-on ports are connected to the Mq add-on modules in a one-to-one correspondence; the multiple waveband signals received by the first output-level optical module also include at least one waveband signal from at least one add-on module in the Mq add-on modules connected to the first output-level optical module.

[0038] The embodiments of the present application can support up and down waves at the wavelength band level through input-level optical modules and output-level optical modules.

[0039] In a possible implementation, the device further includes a control module, the control module sending a first control signal to the q waveband-level optical switching modules, the first control signal being used to control the q waveband-level optical switching modules to be in a first optical switching mode;

[0040] The first waveband-level optical switching module is specifically configured to switch the waveband signal input from the first high-order input port to the first low-order output port in the first optical switching mode.

[0041] In a possible implementation, the control module is further used to send a second control signal to the q waveband-level optical switching modules, where the second control signal is used to control the q waveband-level optical switching modules to be in a second optical switching mode;

[0042] The first waveband-level optical switching module is specifically configured to switch the waveband signal input from the first high-order input port to the first high-order output port in the second optical switching mode.

[0043] The embodiment of the present application can control the switching of the module between band-level switching and wavelength-level switching.

[0044] In a possible implementation manner, the input-stage optical module is a wavelength selective switch WSS or an arrayed waveguide grating AWG.

[0045] In a possible implementation manner, the output-stage optical module is a wavelength selective switch WSS or an arrayed waveguide grating AWG.

[0046] In a possible implementation, the band-level optical switching module is a micro-electromechanical system MEMS.

[0047] In a second aspect, an embodiment of the present application provides a communication system, which at least includes the optical cross-connection device described in the first aspect or any implementation method of the first aspect.

[0048] In a third aspect, an embodiment of the present application provides a communication method, including: applying to an optical cross-connection device, the optical cross-connection device including N h input-level optical modules, q waveband-level optical switching modules, q1 wavelength-level optical switching modules, and N h Output-level optical modules; N h , q and q1 are all positive integers, q1 is less than or equal to q; the first input-level optical module includes an input port and M output ports, and the first input-level optical module is the N h Any one of the input-level optical modules; the M is a positive integer greater than or equal to q; each of the q waveband-level optical switching modules includes N h high-order input ports and N h high-order output ports, each of the q1 waveband-level optical switching modules also includes N L low-order input ports and N L low-order input ports, each of the q1 wavelength-level optical switching modules includes N l ' input ports and N l 'output port; the first output stage optical module comprises M input ports and an output port, the first output stage optical module is the Nh Any one of the output-level optical modules;

[0049] N of each of the q waveband-level optical switching modules h The N high-order input ports are connected to the h The output ports of the input-level optical modules are connected one by one; each of the wavelength-band-level optical switching modules has N h High-order output ports and N h The input ports of the output-level optical modules are connected one-to-one; the q1 wavelength-level switching modules correspond one-to-one to the q1 wavelength-band-level optical switching modules;

[0050] q1 wavelength-level optical switching modules N in each wavelength-level optical switching module l low-order input ports and N in a wavelength-level optical switching module l The output ports are connected one by one, and different wavelength-level optical switching modules are connected to different wavelength-level optical switching modules. l The low-order output ports and the N l The input ports are connected one by one; N l Less than or equal to N l ',N l Less than or equal to N L ;

[0051] The method comprises:

[0052] Demultiplexing the received optical signal into at least one wavelength band signal through a first input-level optical module, and coupling different wavelength band signals in the at least one wavelength band signal to high-order input ports of different wavelength band-level optical switching modules; each wavelength band signal in the at least one wavelength band signal includes a service optical signal of at least one wavelength; wavelengths of service optical signals included in different wavelength band signals do not overlap; the at least one wavelength band signal includes a first wavelength band signal;

[0053] Switching the first waveband signal input from the first high-order input port to the first high-order output port or the first low-order output port through the first waveband-level optical switching module among the q1 waveband-level optical switching modules;

[0054] When the first waveband-level optical switching module outputs the first waveband signal from the first high-order output port, the first output-level optical module multiplexes at least one received waveband signal into one optical signal and then sends it out, the first output-level optical module is connected to the first waveband-level optical switching module through the first high-order output port, and the at least one waveband signal received by the first output-level optical module includes the first waveband signal;

[0055] When the first wavelength-level optical switching module outputs the first wavelength-level optical switching module from the first low-order output port, the first wavelength-level optical switching module switches the first wavelength-level optical switching module to at least two low-order input ports of the first wavelength-level optical switching module; the first wavelength-level optical switching module switches the wavelength-level signal received from the first low-order input port to the second high-order output port, and outputs the signal through the second output-level optical module connected to the second high-order output port; the first low-order input port is any one of the at least two low-order output ports.

[0056] In a possible implementation, the q wavelength-level optical switching modules correspond one-to-one to q wavelength planes; different wavelength-band signals belonging to the same wavelength plane come from different input-level optical modules, and the wavelengths of the service optical signals included in the different wavelength-band signals belonging to the same wavelength plane belong to the same wavelength band.

[0057] In a possible implementation, the N L Greater than N l The device also includes: q*q2 wave dropping modules and q*q2 wave adding modules, q2=N L -N l ;

[0058] The q2 low-order input ports of each of the q1 waveband-level optical switching modules are connected to the q2 wave modules in a one-to-one correspondence, and different waveband-level optical switching modules are connected to different wave modules; the q2 low-order output ports of each of the q1 waveband-level optical switching modules are connected to the q2 wave modules in a one-to-one correspondence, and different waveband-level optical switching modules are connected to different wave modules;

[0059] The method further comprises:

[0060] Receive a second wavelength signal from a second low-order output port of the first wavelength-level optical switching module through a first drop-wave module, and output the second wavelength signal including a service optical signal of at least one wavelength; or,

[0061] A third waveband signal is received through a first waveband module, and the third waveband signal is input to a second low-order input port of the first waveband-level optical switching module; and the third waveband signal received from the second low-order input port is switched to a third output-level optical module for output through the first waveband-level optical switching module.

[0062] In a possible implementation, the N in the first wavelength-level optical switching module l '-N l Wavelength-adding ports and N l '-N l Wavelength drop ports;

[0063] The method further comprises:

[0064] A first service optical signal is received through a first upstream port of the first wavelength-level optical switching module, and the first service optical signal is exchanged to a third low-order input port of the first wavelength-level optical switching module; and a fourth wavelength-band signal input from the third low-order input port is exchanged to a fourth output-level optical module through the first wavelength-level optical switching module, and the fourth wavelength-band signal is output through the fourth output-level optical module; the fourth wavelength-band signal includes the first service optical signal; or

[0065] The second service optical signal in the fifth wavelength band signal from the third low-order output port is switched to the first drop wave port for output through the first wavelength level optical switching module.

[0066] In a possible implementation, M is greater than q, and the device further includes N h *(Mq) wave module and N h *(Mq) wave modules;

[0067] The N h The Mq output ports of each input-level optical module in the N input-level optical modules are used as drop-wave ports, and the Mq drop-wave ports are connected to the Mq drop-wave modules in a one-to-one correspondence; h The Mq input ports of the first output-stage optical module in the output-stage optical modules are used as add-on ports, and the Mq add-on ports are connected to the Mq add-on modules in a one-to-one correspondence;

[0068] The method further comprises:

[0069] The sixth waveband signal in the at least one waveband signal is output to the second drop wave module through the first input stage optical module, and the sixth waveband signal including at least one service optical signal is output through the second drop wave module. The second drop wave module is the N h *One of (Mq) wave modules; or,

[0070] The seventh wavelength band signal is received through the second add-wave module and sent to the first output-stage optical module, so as to be output through the first output-stage optical module, wherein the seventh wavelength band signal includes at least one service optical signal.

[0071] In a possible implementation, switching the waveband signal input from the first high-order input port to the first low-order output port by the first waveband-level optical switching module includes:

[0072] In the first optical switching mode, the first band-level optical switching module is controlled to switch the band signal input from the first high-order input port to the first low-order output port.

[0073] In a possible implementation, switching the waveband signal input from the first high-order input port to the first high-order output port by the first waveband-level optical switching module includes:

[0074] In the second optical switching mode, the first waveband-level optical switching module is controlled to switch the waveband signal input from the first high-order input port to the first high-order output port.

[0075] Based on the implementations provided in the above aspects, the present application can also be further combined to provide more implementations. BRIEF DESCRIPTION OF THE DRAWINGS

[0076] Figure 1 A schematic diagram of the structure of an optical cross-connection device provided in an embodiment of the present application;

[0077] Figure 2 A schematic diagram of the structure of another optical cross-connection device provided in an embodiment of the present application;

[0078] Figure 3 A schematic diagram of the exchange relationship between the wavelength-level optical switching module and the waveband-level optical switching module provided in the embodiment of the present application;

[0079] Figure 4 A schematic diagram of the exchange relationship between the wavelength-level optical switching submodule and the wavelength-band-level optical switching module provided in an embodiment of the present application;

[0080] Figure 5 A schematic diagram of the structure of another optical cross-connection device provided in an embodiment of the present application;

[0081] Figure 6 A schematic diagram of the waveband-level up-down wave structure in the optical cross-connection device provided in an embodiment of the present application;

[0082] Figure 7 A schematic diagram of a wavelength-level up / down wave structure in an optical cross-connection device provided in an embodiment of the present application;

[0083] Figure 8 A schematic diagram of the structure of an optical cross-connection device provided in Example 1 of an embodiment of the present application;

[0084] Fig. 9 A schematic diagram of the structure of an optical cross-connection device provided in Example 2 of an embodiment of the present application;

[0085] Fig.10A schematic diagram of the structure of an optical cross-connection device provided in Example 3 of the embodiment of the present application;

[0086] Fig.11 A flow chart of a communication method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0087] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0088] Among them, in the description of this application, unless otherwise specified, "multiple" means two or more than two. In addition, " / " indicates that the objects associated before and after are in an "or" relationship, for example, A / B can represent A or B; "and / or" in this application is only a kind of association relationship describing the associated objects, indicating that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone, where A and B can be singular or plural. In addition, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, in the embodiments of the present application, the words "first" and "second" are used to distinguish the same items or similar items with basically the same functions and effects. Those skilled in the art can understand that the words "first" and "second" do not limit the quantity and execution order, and the words "first" and "second" do not limit them to be different. It should also be noted that, unless otherwise specified, the specific description of some technical features in one embodiment can also be used to explain the corresponding technical features mentioned in other embodiments.

[0089] The optical switching interconnect (OXC) equipment involved in the embodiments of the present application can be applied to scenarios such as "East Data and West Computing", fiber spatial division multiplexing (FSDM) parallel fiber networks, and large-scale data center interconnects (DCI). The "data" in "East Data and West Computing" refers to data, and the "computing" refers to computing power, that is, the ability to process data. "East Data and West Computing" is to guide the computing power demand in the east to the west in an orderly manner by building a new computing power network system that integrates data centers, cloud computing, and big data, optimize the construction layout of data centers, and promote coordinated linkage between the east and the west.

[0090] In the current traditional OXC structure, WSS is used as the basic unit. The line board corresponding to the scheduling of one dimension, multiple line boards are interconnected through the optical backplane to form an overall optical cross-connection network. By controlling WSS to route the line optical signal according to the granularity of the wavelength level, multi-dimensional wavelength-level optical scheduling between lines is realized. However, with the requirements for the evolution of large dimensions, the traditional WSS is limited by the optical complexity and LCOS switching angle, and cannot meet the current demand for larger dimensions.

[0091] The embodiments of the present application provide an optical cross-connection device, device and communication method, which adopts high- and low-order mixed scheduling of waveband signals, where the high order is used for waveband-level switching and the low order is used for wavelength-level switching. Compared with the current routing based on wavelength-level granularity, the present application can realize waveband-level optical scheduling and wavelength-level switching, which is suitable for switching scenarios with larger dimensions (or larger particles).

[0092] See also Figure 1As shown, it is a structural schematic diagram of an optical cross-connection device provided in an embodiment of the present application. The optical cross-connection device 100 includes multiple input-level optical modules, multiple waveband-level optical switching modules, multiple wavelength-level optical switching modules and multiple output-level optical modules. Multiple waveband-level optical switching modules include high-order ports, including high-order input ports and high-order output ports. At least one waveband-level optical switching module among the multiple waveband-level optical switching modules also includes a low-order port, and the low-order port includes a low-order input port and a low-order output port. The high-order input port is used to connect the input-level optical module, and the high-order output port is used to connect the output-level optical module. The low-order port is used to connect the wavelength-level optical switching module, that is, the low-order output port is connected to the input port of the wavelength-level optical switching module, and the low-order input port is used to connect the output port of the wavelength optical switching module. Each input-level optical module is respectively connected to multiple waveband-level optical switching modules, and different input-level optical switching modules are connected to the high-order input ports of different waveband-level optical switching modules. Each output-level optical module is respectively connected to multiple waveband-level optical switching modules, and different output-level optical switching modules are connected to the high-order output ports of different waveband-level optical switching modules. In other words, the multiple high-order input ports of each wavelength-band-level optical switching module are connected to the multiple input-level optical modules in a one-to-one correspondence. The multiple high-order output ports of each wavelength-band-level optical switching module are connected to the multiple output-level optical modules in a one-to-one correspondence. Each input-level optical module is used to demultiplex the input optical signal into multiple wavelength-band signals, and different wavelength-band signals are input to the high-order input ports of different wavelength-band-level optical switching modules. Each of the multiple wavelength-band signals demultiplexed by the input-level optical module includes a service optical signal of at least one wavelength. There is no overlap in the wavelengths of the service optical signals included in different wavelength-band signals among the multiple wavelength-band signals. After receiving the wavelength-band signal from the high-order input port, the wavelength-band-level optical switching module exchanges the wavelength-band signal to the corresponding high-order output port or the corresponding low-order output port. The exchange relationship between the high-order input port and the high-order output port, or the exchange relationship between the high-order input port and the low-order output port, can be obtained by pre-configuration, and of course can also be controlled and adjusted by the control module. The wavelength-level optical switching module is used to perform optical switching processing on at least two service optical signals included in at least one wavelength-band signal received from the corresponding wavelength-band-level optical switching module and input them to at least two low-order input ports. The wavelength-band-level optical switching module switches wavelength-band signals received from different low-order input ports to different high-order output ports.

[0093] For illustration purposes, see Figure 2 As shown, the number of input optical modules is N. h , respectively, are input-level optical modules 200_1 to 200_N h The number of waveband-level optical switching modules is q, which are waveband-level optical switching modules 300_1 to 300_q, the number of wavelength-level optical switching modules is q1, which are wavelength-level optical switching modules 400_1 to 400_q1, and the number of output-level optical modules is N.h , which are output-level optical modules 500_1 to 500_N respectively h For example. h , q and q1 are all positive integers, and q1 is less than or equal to q. The specification of each input-level optical module is 1×M, that is, it includes one input port and M output ports. Each output-level optical module includes M input ports and one output port. M is a positive integer greater than or equal to q. The specification of each of the q waveband-level optical switching modules is N×N. N=N h +N L Each wavelength-level optical switching module includes N h high-order input ports and N h Each of the q1 waveband-level optical switching modules also includes N L low-order input ports and N L low-order input ports, each of the q1 wavelength-level optical switching modules includes N l ' input ports and N l The first output-stage optical module includes M input ports and one output port, and the first output-stage optical module is the N h Any of the output stage optical modules. L is a positive integer, N l ' is a positive integer.

[0094] N of each of the q waveband-level optical switching modules h The N high-order input ports are connected to the h The output ports of the input-level optical modules are connected one by one. h Each waveband-level optical switching module has N h High-order output ports and N h The input ports of the output-level optical modules are connected one by one; the N h The input ports belong to different output-level optical modules respectively.

[0095] q1 wavelength-level optical switching modules N in each wavelength-level optical switching module l N low-order input ports and a wavelength-level optical switching module l The output ports are connected one by one, and the q1 waveband-level optical switching modules are connected one by one with the q1 wavelength-level optical switching modules. l The low-order output ports and the N l The input ports are connected one by one; N lLess than or equal to N l ',N l Less than or equal to N L The specification of wavelength-level optical switching module is N l '×N l '.

[0096] The functions of each module are explained below with examples.

[0097] Input level optical module:

[0098] N h Any input-level optical module selected from the input-level optical modules is called the first input-level optical module 200_i. The first input-level optical module 200_i demultiplexes the received optical signal into at least one wavelength band signal, and distributes the at least one wavelength band signal to at least one wavelength band-level optical switching module in a one-to-one correspondence. Each wavelength band signal in the at least one wavelength band signal includes a service optical signal of at least one wavelength. The wavelengths of the service optical signals included in different wavelength band signals in the at least one wavelength band signal do not overlap. The number of service optical signals included in different wavelength band signals can be the same or different. The wavelengths of the service optical signals included in the same wavelength band signal are all different. Taking the wavelength channel of the C+L spectrum as an example, in the configuration stage, the wavelength channel of the C+L spectrum can be evenly divided into q wavelength bands, each wavelength band includes d wavelengths, different wavelength bands correspond to different wavelength band planes, and different wavelength band planes correspond to different wavelength band-level optical switching modules. The wavelength channel can be 80 wavelengths @ 150GHz, or it can be 60 wavelengths @ 200GHz, etc.

[0099] In some possible scenarios, not all service optical signals corresponding to wavelengths need to be exchanged or generated at the same time. Therefore, at a certain time, the number of wavelength band signals of the optical signal received by the first input-level optical module can be one or more. And the number of service optical signals included in each wavelength band signal of the wavelength division is less than or equal to d.

[0100] As an example, the input-stage optical module may adopt a wavelength selective switch (WSS), or an array waveguide grating (AWG), or other optical devices capable of achieving wavelength demultiplexing.

[0101] Waveband-level optical switching module:

[0102] For example, one of the q waveband-level optical switching modules is selected as the first waveband-level optical switching module 300_i. The first waveband-level optical switching module 300_i among the q waveband-level optical switching modules is used to receive signals from N hInput-level optical modules 200_1 to 200_N h At least one input-level optical module N h Band signal, N h Different wavelength band signals in the plurality of wavelength band signals come from different input-level optical modules. The first wavelength band level optical switching module 300_i supports the use of N h The high-order input ports receive N h Input-level optical modules 200_1 to 200_N h band signal.

[0103] In some embodiments, each of the q waveband-level optical switching modules can be mounted with a wavelength-level optical switching module, in which case q=q1. In other embodiments, some of the q waveband-level optical switching modules may be mounted with a wavelength-level optical switching module, while other waveband-level optical switching modules may not be mounted with a wavelength-level optical switching module, in which case q>q1. The waveband-level optical switching module that is not mounted with a wavelength-level optical switching module is only used to realize waveband-level optical switching. The waveband-level optical switching module that is mounted with a wavelength-level optical switching module can realize optical switching of waveband signals and exchange of service optical signals of different wavelengths included in the waveband signals by combining the wavelength-level optical switching module with the waveband-level optical switching module. The waveband-level optical switching module supports the exchange of waveband signals received from a high-order input port to a high-order output port for output, and also supports the exchange to a low-order output port for output. The waveband-level optical switching module also supports the exchange of waveband signals received from a low-order input port to a high-order output port for output.

[0104] In a possible scenario, a wavelength-level optical switching module is mounted below the first waveband-level optical switching module 300i. The first waveband-level optical switching module 300_i is connected from N h For example, if all input-level optical modules receive the band signal, the first band-level optical switching module 300_i will receive the N h The high-order input ports receive the N h A portion of the wavelength band signals (hereinafter referred to as the first portion of the wavelength band signals) is directly exchanged and output from one or more high-order output ports, that is, output to one or more output-level optical modules through one or more high-order output ports. The number of output-level optical modules is related to the number of wavelength band signals that do not require wavelength-level optical switching. Another portion of the different wavelength band signals (referred to as the second portion of the wavelength band signals) includes multiple wavelengths of service optical signals that require wavelength-level optical switching, so the other portion can be output to the first wavelength-level optical switching module 400_i that is hung below for wavelength-level optical switching.

[0105] N h The N high-order input ports are input to the first waveband-level optical switching module 300_i. hThe first wavelength-band signal can be divided into a first wavelength-band signal and a second wavelength-band signal. The first wavelength-band-level optical switching module 300_i outputs the first wavelength-band signal from a high-order output port; different wavelength-band signals in the first wavelength-band signal are output through different high-order output ports. The first wavelength-band-level optical switching module 300_i outputs the second wavelength-band signal through a low-order output port.

[0106] In another possible scenario, take the first wavelength-level optical switching module 300_i as an example, and take the wavelength-level optical switching module under the first wavelength-level optical switching module 300_i as the first wavelength-level optical switching module 400_i. In a possible example, the N received by the first wavelength-level optical switching module 300_i h Each wavelength band signal may need to be switched at the wavelength level, then N h Each of the waveband signals is output through the low-order output port, and different waveband signals are output through different low-order output ports. In another possible example, the first waveband-level optical switching module 300_i receives N h Each wavelength band signal does not need to be switched at the wavelength level, so N h Each band signal is output through the high-order output port. h The waveband signal is sent to N h An optical module with an output stage.

[0107] In another possible scenario, take the example of some wavelength-level optical switching modules without wavelength-level optical switching modules. The ports of some wavelength-level optical switching modules without wavelength-level optical switching modules are all high-order ports, and do not include low-order ports. In this case, the high-order ports of some wavelength-level optical switching modules without wavelength-level optical switching modules can also be referred to as ports, including input ports and output ports. These wavelength-level optical switching modules receive the signals from the N h The wavelength band signal of at least one input-level optical module of the input-level optical module is optically exchanged at the wavelength band level and output to the corresponding output-level optical module through the corresponding high-order output port. Different wavelength band signals are output to different output-level optical modules through different high-order output ports.

[0108] As an example, see Figure 3As shown, taking the first waveband-level optical switching module 300_i with a wavelength-level optical switching module hung under it as an example, the wavelength-level optical switching module hung under the first waveband-level optical module 300_i is the first wavelength-level optical switching module 400_i. Taking the first high-order input port of the first waveband-level optical switching module 300_i as an example. The first high-order input port is any high-order input port of the first waveband-level optical switching module 300_i. The first waveband-level optical switching module 300_i exchanges the waveband signal received from the first high-order input port to the first high-order output port or the first low-order output port.

[0109] As an example, the wavelength-band optical switching module may adopt a micro-electro-mechanical system (MEMS) or other optical devices capable of switching wavelength-band signals.

[0110] Wavelength-level optical switching module:

[0111] The wavelength-level optical switching module is used to perform optical switching on the service optical signals of multiple wavelengths in the received wavelength band signal. According to the configuration requirements, the service optical signal of a certain wavelength in a certain wavelength band signal from a certain input-level optical module is switched to the required target low-order input port. Taking the first wavelength-level optical switching module 400_i as an example, the first wavelength-level optical switching module 400_i includes N l ' input ports and N l The first wavelength-level optical switching module 400_i supports N l'The business optical signals included in the waveband signals input by the input ports are exchanged to different output ports. It should be understood that after exchange, if the waveband signals output by different output ports include multiple business optical signals, the wavelengths of the multiple business optical signals are all different. The exchange relationship of the business optical signals included in the waveband signals input by each wavelength-level optical switching module can be configured in advance according to the needs. As an example, the wavelength-level optical switching module can exchange the waveband signals to which the business optical signals from different input-level optical modules with the same wavelength belong. For example, waveband signal 1 and waveband signal 2 both include business optical signals of wavelength 1, but the two business optical signals of wavelength 1 come from different input-level optical modules. After the wavelength-level optical switching module performs the exchange, the business optical signal of wavelength 1 included in waveband signal 1 is exchanged into waveband signal 2, and the business optical signal of wavelength 1 included in waveband signal 2 is exchanged into waveband signal 1. As another example, the wavelength-level optical switching module can exchange a business optical signal of a certain wavelength from one waveband signal to another waveband signal, and the other waveband signal does not include the business optical signal of the wavelength before the exchange is performed. For example, wavelength band signal 1 includes a service optical signal of wavelength 1, but wavelength band signal 2 does not include a service optical signal of wavelength 1. After the wavelength-level optical switching module performs switching, the service optical signal of wavelength 1 included in wavelength band signal 1 is switched to wavelength band signal 2.

[0112] It should be noted that the exchange required by the embodiment of the present application is related to the target input signal and the target output signal, and the exchange relationship between the ports can be pre-configured according to the input signal corresponding to the port and the required output signal.

[0113] For example, the first wavelength-level optical switching module 400i is optically connected to the first wavelength-level optical switching module 300_i. The first wavelength-level optical switching module 400_i receives a wavelength signal from the first wavelength-level optical switching module 300_i from the first low-order output port. The first wavelength-level optical switching module 400_i switches the wavelength signal from the first low-order output port to at least two low-order input ports of the first wavelength-level optical switching module 300_i. In some possible scenarios, the wavelength signal includes only one service optical signal, and the service optical signal is output to a low-order input port of the first wavelength-level optical switching module 300_i through an output port after the wavelength-level optical switching of the first wavelength-level optical switching module 400_i. The first low-order input port is included in the at least two low-order output ports, and further, the first wavelength-level optical switching module 300_i switches the wavelength signal received from the first low-order input port to the corresponding high-order output port, such as the second high-order output port.

[0114] In one possible implementation, see Figure 4As shown, each of the q1 wavelength-level optical switching modules includes t wavelength-level optical switching sub-modules. Each wavelength-level optical switching sub-module includes K input ports and K output ports. Taking the first wavelength-level optical switching module 400_i as an example, N of the t wavelength-level optical switching sub-modules in the first wavelength-level optical switching module 400_i are l The input ports and the N of the first waveband-level optical switching module 300_i l The low-order output ports are connected one by one, and N of the t wavelength-level optical switching sub-modules in the first wavelength-level optical switching module 400_i are connected. l The output ports are connected to the N of the first waveband-level optical switching module 300_i. l The low-order input ports are connected one by one. Both t and K are positive integers, t*K=N l In this embodiment, each wavelength-level optical switching module is connected to t wavelength-level optical switching submodules, and each wavelength-level optical switching submodule has a switching capacity of K input ports and K output ports. Therefore, it can be understood that each wavelength-level optical switching module can realize N l Flexible switching of t wavelength partitions in each direction. If q1 wavelength-level optical switching modules are one device, such as WSS or B-WSS, with N l input ports and N l output ports, then N l Flexible exchange of wavelengths in all directions.

[0115] In addition, in the embodiment of the present application, the number and specifications of different wavelength-level optical switching submodules included in different wavelength-level optical switching modules can be the same or different. The number and specifications of the wavelength-level optical switching submodules connected to each wavelength-level optical switching module can be independently configured. For example, the first wavelength-level optical switching module includes t1 wavelength-level optical switching submodules, each of which includes K1 input ports and K1 output ports, and t1*K1=N l The second wavelength-level optical switching module includes t2 wavelength-level optical switching sub-modules, each wavelength-level optical switching sub-module includes K2 input ports and K2 output ports, t2*K2=N l '.

[0116] As an example, the wavelength-level optical switching module may adopt WSS or band-WSS (B-WSS), or other optical devices capable of implementing wavelength-level port signal switching. B-WSS is a WSS that processes bands.

[0117] Output stage optical module:

[0118] N hAny one of the output-level optical modules is called a first output-level optical module 500_i. The first output-level optical module 500_i is used to multiplex the received multiple wavelength band signals into one optical signal and then send it out. The multiple wavelength band signals received by the first output-level optical module include at least one wavelength band signal from at least one wavelength band level optical switching module.

[0119] As an example, the output-stage optical module may adopt WSS, or AWG, or an optical device capable of realizing wavelength band signal multiplexing.

[0120] In a possible implementation manner of the present application, the optical cross-connection device may further support wavelength addition and subtraction at the wavelength band level and / or wavelength addition and subtraction at the wavelength level.

[0121] In the first possible way, the band-level up and down waves are realized through input stage modules and output stage modules.

[0122] In this case, the number of output ports M included in each input-level optical module is greater than q. The q output ports of each input-level optical module are used to connect to q wavelength-band-level optical switching modules in a one-to-one correspondence. The remaining Mq output ports of each input-level optical module serve as drop ports for connecting to drop modules (DM). The number of input ports M included in each output-level optical module is greater than q. The q input ports of each output-level optical module are used to connect to q wavelength-band-level optical switching modules in a one-to-one correspondence. The remaining Mq input ports of each output-level optical module serve as add ports for connecting to add modules (AM). Drop modules and add modules can be deployed within optical cross-connect devices, and can also be deployed outside optical cross-connect devices. For example, see Figure 5 As shown, the drop wave module and the add wave module are deployed in the optical cross-connection device, and the optical cross-connection device also includes N h *(Mq) wave modules and N h *(Mq) wave module. Then, N h The Mq output ports of each input-level optical module in the input-level optical modules are used as drop-wave ports, and the Mq drop-wave ports are connected to the Mq drop-wave modules in a one-to-one correspondence. The input-level optical module is also used to output a waveband signal to the connected drop-wave module through the drop-wave port. Taking the first input-level optical module 200_i as an example, the first input-level optical module 200_i is also used to output a first waveband signal in at least one waveband signal obtained by wave splitting to a second drop-wave module. The second drop-wave module is the N h *One of (Mq) wave modules. N hThe Mq input ports of each output-level optical module in the output-level optical modules are used as the add-on ports, and the Mq add-on ports are connected to the Mq add-on modules in a one-to-one correspondence. The output-level optical module is also used to input a waveband signal to the main optical path through the add-on port. Taking the first output-level optical module 500_i as an example, the first output-level optical module 500_i is also used to multiplex the waveband signals received from the Mq add-on ports with the waveband signals received from the high-order output port of the first waveband-level optical switching module 300_i into one optical signal for output.

[0123] In some possible scenarios, the waveband signal of the dropped wave does not enter the waveband-level optical switching module, that is, the waveband signal of the dropped wave does not continue to be transmitted on the main optical path. The first input-level optical module 200_i supports splitting the input optical signal into N waves. h The first input stage optical module 200_i converts N h The waveband signal passes through N h output ports. If N h Some of the band signals need to be processed, then N h The output ports include the waveband drop port. In this case, the waveband signal of this part of the waveband processed by the waveband drop will not be sent to the waveband-level optical switching module.

[0124] In some other possible scenarios, the waveband signal of the next wave can also enter the waveband level optical switching module, that is, the waveband signal of the next wave can continue to be transmitted on the main optical path. This solution can be applied to broadcast or multicast scenarios. The first input level optical module 200_i supports splitting the input optical signal into N waves. h The first input stage optical module 200_i converts N h The band signal passes through at least N h Output ports output. At least N h Among the output ports, N h Output ports for outputting N h If N h If some of the band signals need to be processed, then at least N h Each output port also includes a waveband drop port. In this case, the waveband signal of the waveband drop processing is also sent to the waveband level optical switching module.

[0125] In the second possible manner, the wavelength adding and dropping is realized by using a wavelength-level optical switching module. l The low-order input / output ports are used to connect wavelength-level optical switching modules, and the remaining q2=N L -N lThe low-order input ports are used as add-in ports, and the remaining q2 low-order output ports are used as drop-in ports. The add-in ports are used to connect to the add-in module (AM), and the drop-in ports are used to connect to the drop-in module (DM). The drop-in module and the add-in module can be deployed in the optical cross-connection device or outside the optical cross-connection device.

[0126] For example, see Figure 6 As shown, the drop-wave module and the add-wave module are deployed in the optical cross-connection device, and the optical cross-connection device also includes q*q2 drop-wave modules and q*q2 add-wave modules. The q2 low-order input ports of each of the q1 waveband-level optical switching modules are connected to the q2 add-wave modules in a one-to-one correspondence, and different waveband-level optical switching modules are connected to different add-wave modules. The q2 output ports of each of the q1 waveband-level optical switching modules are connected to the q2 drop-wave modules in a one-to-one correspondence, and different waveband-level optical switching modules are connected to different drop-wave modules.

[0127] In one possible application scenario, the dropped waveband signal does not enter the output-level optical module, that is, the dropped waveband signal will not continue to be transmitted on the main optical path. When some waveband signals need to be dropped, the waveband-level optical switching module can switch the waveband signals that need to be dropped to the corresponding low-order output port for output. These waveband signals that need to be dropped will not be switched to the high-order output port for output.

[0128] In another possible application scenario, the waveband signal that has been dropped can also enter the output-level optical module, that is, the waveband signal that has been dropped can continue to be transmitted on the main optical path as required. This solution can be applied to broadcast or multicast scenarios. When some waveband signals need to be dropped, the waveband-level optical switching module can switch the waveband signals that need to be dropped to the corresponding low-order output port for output. If these waveband signals that need to be dropped need to be sent to other target devices, these dropped waveband signals can continue to be switched to the target's high-order output port for output.

[0129] Taking the first drop-wave module among the q*q2 drop-wave modules as an example, the first drop-wave module is connected to the second low-order output port of the first waveband-level optical switching module, and is used to output the waveband signal from the second low-order output port including the service optical signal of at least one wavelength. The first add-wave module among the q*q2 add-wave modules is connected to the second low-order input port of the first waveband-level optical switching module, and is used to multiplex the received service optical signals of multiple wavelengths into one waveband signal and then output it to the second low-order input port. Furthermore, the first waveband-level optical switching module is also used to switch the waveband signal received from the second low-order input port to the second high-order output port corresponding to the second low-order input port for output.

[0130] In a third possible implementation, wavelength-level optical switching modules are used to implement wavelength-level addition and subtraction. Each wavelength-level optical switching module includes N l ' input ports and N l ' output ports. Among them, N in each wavelength-level optical switching module l The input ports are used to communicate with the corresponding waveband-level optical switching modules. l The low-order output ports are connected one by one, and the N l The output ports are used to communicate with the corresponding waveband-level optical switching modules. l The remaining N low-order input ports in each wavelength-level optical switching module are connected one by one. l '-N l The remaining N input ports in each wavelength-level optical switching module are used as add-wave ports. l '-N l The output ports are used as drop-wave ports.

[0131] In one possible implementation, see Figure 7 As shown, each of the q1 wavelength-level optical switching modules includes t wavelength-level optical switching sub-modules, and each wavelength-level optical switching sub-module includes K input ports and K output ports. t*K=N l '. In this case, t*K is greater than N l , p output ports in each wavelength-level optical switching submodule in the q1*t wavelength-level optical switching submodule are used as drop-wave ports, and the drop-wave ports are used to output service optical signals of a single wavelength, and p input ports in each wavelength-level optical switching submodule in the q1*t wavelength-level optical switching submodule are used as add-wave ports, and the add-wave ports are used to receive service optical signals of a single wavelength; p = KN l / t.

[0132] In the embodiment of the present application, only the waveband-level add / drop waveports may be provided, only the wavelength-level add / drop waveports may be provided, or both the waveband-level add / drop waveports and the waveband-level add / drop waveports may be provided. In addition, both implementations of the two waveband-level add / drop waveports may be configured, or only one may be configured.

[0133] In a possible implementation, the waveband-level optical switching module can be switched in a plurality of optical switching modes. Different optical switching modes correspond to optical switching relationships between different input ports and output ports of the waveband-level optical switching module.

[0134] In one possible scenario, the wavelength-level optical switching module is in the first optical switching mode, and a switching relationship is established between some or all of the high-order input ports and low-order output ports in the wavelength-level optical switching module. Some received wavelength-level signals do not need to be optically switched at the wavelength level, and can be switched out through the corresponding high-order output ports of the wavelength-level optical switching module. Other received wavelength-level signals need to be optically switched at the wavelength level, and can be switched to the wavelength-level optical switching module through the corresponding low-order output ports through the wavelength-level optical switching module, and then the wavelength-level optical switching module performs optical switching between the service optical signals of each wavelength included in the wavelength-level optical switching module. Taking the first wavelength-level optical switching module 300_i as an example, the first wavelength-level optical switching module 300_i switches the wavelength-level signal input from the first high-order input port to the first low-order output port in the first optical switching mode.

[0135] In another possible scenario, the wavelength-level optical switching module is in the second optical switching mode, and a switching relationship is established between all high-order input ports and high-order output ports in the wavelength-level optical switching module. In this scenario, all wavelength-level signals do not need to perform wavelength-level optical switching. Taking the first wavelength-level optical switching module 300_i as an example, the first wavelength-level optical switching module 300_i switches the wavelength signal input from the first high-order input port to the first high-order output port in the second optical switching mode.

[0136] In some embodiments, a plurality of exchange modes can be set for the exchange relationship between the high-order input port and the low-order output port, and different exchange modes correspond to different exchange relationships between the high-order input port and the low-order output port. For example, in the first optical exchange mode, the first waveband-level optical exchange module 300_i exchanges the waveband signal input from the first high-order input port to the first low-order output port. In the third optical exchange mode, the first waveband-level optical exchange module 300_i exchanges the waveband signal input from the first high-order input port to the third low-order output port. The first low-order output port and the third low-order output port are two different low-order output ports of the first waveband-level optical exchange module 300_i.

[0137] In some embodiments, the wavelength-level optical switching module may also have a switching relationship between the service optical signal of the input port and different output ports in different optical switching modes.

[0138] In some possible implementations, switching between the above-mentioned different optical switching modes can be performed by a control module or a control device. The control device can be deployed inside the optical cross-connection device or outside the optical cross-connection device. The control device is used to send a control signal to the wavelength-level optical switching module to control the optical switching mode of the wavelength-level optical switching module. Taking the first wavelength-level optical switching module 300_i as an example, the control device sends a first control signal to the first wavelength-level optical switching module 300_i, and the first control signal is used to control the first wavelength-level optical switching module 300_i to be in the first optical switching mode; further, the first wavelength-level optical switching module 300_i exchanges the wavelength signal input from the first high-order input port to the first low-order output port in the first optical switching mode. The control device sends a second control signal to the first band-level optical switching module 300_i, and the second control signal is used to control the first band-level optical switching module 300_i to be in the second optical switching mode; further, the first band-level optical switching module 300_i switches the band signal input from the first high-order input port to the first high-order output port in the second optical switching mode.

[0139] The above control device can be understood as a centralized controller for controlling the switching and exchange of each module.

[0140] The control device may include one or more processors. The processor may be a general-purpose processor or a dedicated processor, etc. For example, it may be a baseband processor or a central processing unit. The baseband processor may be used to process the communication protocol and communication data, and the central processing unit may execute the software program and process the data of the software program. The control device may include a transceiver to realize the input (reception) and output (transmission) of the signal.

[0141] The control device may include one or more processors, and the one or more processors may implement control or configuration of the optical cross-connect network (such as switching of the exchange mode, etc.). Optionally, in addition to implementing the solutions of the embodiments shown above, the processor may also implement other functions. Optionally, in one design, the processor may execute instructions so that the control device performs resource scheduling, control or configuration of the optical cross-connect network. The instructions may be stored in whole or in part in the processor, or in whole or in part in a memory coupled to the processor. In another possible design, the control device may also include a circuit, and the circuit may implement control or configuration of the optical cross-connect network.

[0142] In another possible design, the control device may include one or more memories on which instructions are stored, and the instructions can be executed on the processor so that the control device performs control or configuration of the optical cross-connect network. Optionally, data can also be stored in the memory. The optional processor can also store instructions and / or data. The processor and the memory can be provided separately or integrated together.

[0143] It should be noted that the processor in the embodiment of the present application can be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method embodiment can be completed by the hardware integrated logic circuit or software instructions in the processor. The above processor can be a general processor, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (application specific integrated circuit, ASIC), a field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed. The general processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor can be combined to perform. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.

[0144] It is understood that the memory in the embodiment of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memory. Among them, the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (programmable ROM, PROM), an erasable programmable read-only memory (erasable PROM, EPROM), an electrically erasable programmable read-only memory (electrically EPROM, EEPROM) or a flash memory. The volatile memory can be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM). It should be noted that memory of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

[0145] Exemplarily, the optical cross-connection device in the embodiment of the present application has multiple slots, and OXC boards with the same or different characteristics are inserted in the multiple slots, and the optical signal interaction between different slots can be realized through optical connection devices. The slots and the optical connection devices can be connected through high-density optical connectors. Optionally, the optical connection device can be an optical backplane, the optical connection device can be an optical fiber box, and the optical connection device can also be other components, which are not limited here. Boards with different characteristics in the embodiment of the present application can be inserted into different slots. For example, multiple input-level optical modules and / or multiple output-level optical modules can be deployed on a single board. For another example, each waveband-level optical switching module corresponds to a single board, and different waveband-level optical switching modules can be inserted into different slots corresponding to different single boards. The embodiment of the present application can adjust or update the required switching dimensions by changing the dimensions of the modules inserted in different slots.

[0146] In a possible implementation, in order to reduce configuration complexity and reduce performance requirements for devices, the embodiments of the present application can be exchanged according to the wavelength plane. That is, one wavelength-level optical switching module corresponds to one wavelength plane, and one wavelength plane corresponds to one wavelength, that is, one wavelength range. It can be understood that different wavelength-level optical switching modules need to process different wavelengths. The q wavelength-level optical switching modules correspond one to one with the q wavelength planes; wherein different wavelength signals belonging to the same wavelength plane come from different input-level optical modules, and the wavelengths of the service optical signals included in the different wavelength signals belonging to the same wavelength plane belong to the same wavelength band. Based on this, the wavelength ranges processed by different wavelength-level optical switching modules correspond to only one wavelength band, and the switching performance requirements for the wavelength-level optical switching modules are relatively low. When the wavelength-level optical switching module performs wavelength-level optical switching, it is necessary to satisfy that the wavelengths of the service optical signals included in the wavelength signals output by each output port are all different.

[0147] In some embodiments, the input-level optical module, the output-level optical module, the waveband-level optical switching module, the wavelength-level optical switching module, and the upper and lower wave modules can be directly connected by interfaces through an orthogonal architecture to achieve close-packed interfaces and high integration, thereby reducing the volume of optical cross-connection equipment. In one example, the waveband-level optical switching module can also adopt a twin integration method.

[0148] The optical cross-connection device provided in the embodiment of the present application can be flexibly configured, for example, the ports for adding and subtracting waves in the waveband can be flexibly configured, and can be configured on the input or output level optical module, or can be configured through the waveband-level optical switching module. In addition, the wavelength-level adding and subtracting waves and / or the waveband-level adding and subtracting waves can be flexibly configured according to demand. In addition, various modules of different specifications can be deployed in the slots of the optical cross-connection device according to demand. For example, when the number of waveband planes remains unchanged, the slots of the MEMS remain unchanged, and the expansion dimension only needs to be achieved by replacing the MEMS OXC. For example, by replacing the specifications of the waveband-level optical switching module to support the expansion and upgrading of the optical switching interconnection device, the dimensional expansion can be achieved by replacing each module, such as 128 dimensions (i.e., 128 directions), 256 dimensions, 384 dimensions, 512 dimensions, and the like.

[0149] In some embodiments, the wavelength-level optical switching module may adopt a quadruple (Quad) / octuple (Octuple, Oct) integration method.

[0150] The solution provided in the embodiments of the present application is described in detail below in conjunction with specific application scenarios.

[0151] Example 1:

[0152] See also Figure 8As shown, it is a structural schematic diagram of an optical cross-interconnection device provided in an embodiment of the present application. In Example 1, an optical cross-interconnection device that supports both wavelength-level up and down waves and wavelength-band-level up and down waves is taken as an example. Take the wavelength-band-level up and down wave ports located on the wavelength-band-level optical switching module as an example. In Example 1, the wavelength channels with a switching demand of C+L spectrum are exchanged in 128 directions as an example. The number of wavelength channels is 80 wavelengths @ 150GHz. Example 1 takes the high- and low-order mixed scheduling of the wavelength band plane as an example, and evenly divides the C+L wavelength into 20 wavelength bands, namely wavelength bands B1, B2, ... B20, that is, corresponding to 20 wavelength band planes, each of which contains 4 wavelengths, forming a super channel (SuperChannel). Figure 8 In the example, both the input-level optical module and the output-level optical module use AWG.

[0153] See also Figure 8 As shown, the optical cross-connect device includes 128 input-level AWGs and 128 output-level AWGs, namely N h =128. The specification of the AWG at the input stage is 1×20, and the specification of the AWG at the output stage is 20×1, that is, M=20. The AWG at the input stage is used to distribute each wavelength band. The AWG at the output stage is used to collect each wavelength band. The optical cross-connection device also includes 20 wavelength-level optical switching modules with a specification of 256×256. The wavelength-level optical switching module can be called a switching matrix. In Example 1, the use of MEMS in the wavelength-level optical switching module is taken as an example. The optical cross-connection device also includes 20*6 wavelength-level optical switching modules, that is, t=6, M=q=q1=20. Figure 8 In the example, a wavelength-level optical switching module B-WSS is used. The specification of B-WSS is 18×18, that is, K=18.

[0154] For each band plane: it contains 1 MEMS, and 128 ports are allocated as high-order ports for high-order scheduling. The 128 ports include 128 input ports as high-order input ports, and 128 output ports as high-order output ports. The other 128 ports are used as low-order ports for low-order scheduling, that is, N L = 128. Among them, 108 low-order ports of the 128 low-order ports are connected to 6 wavelength-level optical switching modules for wavelength-level optical switching, that is, N l =108. The remaining 20 ports of the 128 low-order ports are used as add / drop ports, connected to AM / DM for adding / dropping waves at the waveband level, that is, q2 = N L -N l = 20. For each 18x18 B-WSS, 16 ports are used for low-order scheduling, and the other 2 ports are used as wavelength-level add / drop ports for wavelength-level add / drop.

[0155] For example, MEMS can be directly interfaced with AWG at the input stage and AWG, B-WSS, AM / DM, etc. at the output stage through an orthogonal architecture.

[0156] For each input-level AWG, different output ports correspond to different wavelength planes, that is, they are connected to different MEMS. Each input-level AWG demultiplexes the received optical signal according to the wavelength corresponding to each configured output port, and the service optical signals belonging to different wavelengths are output through different output ports to be sent to different MEMS. For example, the 128 input-level AWGs are input-level AWG1 to input-level AWG128. Each AWG includes 20 output ports, namely output port 1 to output port 20, corresponding to wavelengths B1 to B20, respectively. The 20 MEMS are MEMS1 to MEMS20. The output port 1 of each input-level AWG of the 20 input-level AWGs is connected to MEMS1, and the output port 2 of each input-level AWG is connected to MEMS2, and so on. The output port 20 of each input-level AWG is connected to MEMS20.

[0157] For each MEMS, it supports receiving signals from 128 input-level AWGs, that is, 128 directional wavebands B1. The 128 high-order output ports of each of the 20 MEMS are connected to different output-level AWGs, corresponding to 128 output directions. When each MEMS performs optical switching, the waveband signal of the high-order input port is switched to the corresponding high-order output port output according to the configuration relationship between the input direction and the output direction, that is, the switching relationship between the high-order input port and the high-order output port. In some other scenarios, the service optical signal of the waveband from one direction needs to be sent to at least two output directions. In this case, B-WSS is required to perform wavelength-level optical switching. In this case, the control device can control the MEMS to switch the optical switching mode. Taking MEMS1 as an example, for the four service optical signals λ1, λ2, λ3 and λ4 from the input stage AWG1 belonging to the band B1-1, and for the four service optical signals λ1′, λ2′, λ3′ and λ4′ from the input stage AWG2 belonging to the band B1-2, the wavelength-level service optical signals need to be exchanged. After the exchange, the band B1-1 includes λ1', λ2, λ3 and λ4, and the band B1-2 includes λ1, λ2′, λ3′ and λ4′. It can be understood that the above exchange is only used as an example, and it can be configured according to the needs.

[0158] For each MEMS, the waveband signal from a certain direction that needs to be dropped can be output to the drop module through the corresponding low-order output port, so that the drop module can send it to the corresponding local receiving module. For each MEMS, the waveband signal from a certain direction that needs to be uploaded is collected by the corresponding upload module and input to the MEMS through the corresponding low-order input port.

[0159] For each B-WSS, the wavelength band signal received from the input port can be split. After splitting, the service optical signal that needs to be dropped is sent out through the drop port. The split service optical signal and the service optical signal received through the add port are then multiplexed. After multiplexing, each wavelength band signal includes at most 4 service optical signals, and the wavelengths of the 4 service optical signals are different.

[0160] In the above example 1, high- and low-order mixed scheduling of the sub-band plane is adopted to realize 128D (dimensional) switching (i.e. switching in 128 directions). In example 1, from the perspective of insertion loss, the insertion loss (IL) of the high-order scheduling with a high proportion has obvious advantages. For example, the IL of AWG is ~3dB, the IL of MEMS is ~4dB, and the IL of the orthogonal interface is ~1dB. It can be estimated that the IL of high-order scheduling is ~12dB; for example, the IL of 16×16B-WSS (4 waves) is ~6dB. After MEMS scheduling twice, it can be estimated that the IL of low-order scheduling is ~24dB. In some scenarios, selecting a port with better performance of MEMS can further reduce the insertion loss. According to the IL~4dB of AM / DM, it can be estimated that the IL of up and down waves at the wavelength level is ~16dB; the IL of up and down waves at the wavelength level is ~18dB. From the perspective of flexibility, the optical cross-connection equipment can configure the specifications and quantity of wavelength-level optical switching modules as needed through the number of ports scheduled by low-order scheduling, and different waveband planes can be configured separately. For example, the specifications of B-WSS can be selected as 2×2, ..., 16×16, ..., 128×128, etc. From the perspective of scalability, the above can expand the implementation dimension of the optical cross-connection equipment by improving the specifications of each module. For example, from 64D to 128 dimensions, or to 256 dimensions, or to 512 dimensions, etc. When the number of waveband planes remains unchanged, the slots of the MEMS remain unchanged, and the expansion dimension only needs to be achieved by replacing the MEMS.

[0161] Example 2:

[0162] See also Fig. 9As shown, it is a structural schematic diagram of an optical cross-interconnection device provided in an embodiment of the present application. In Example 2, an optical cross-interconnection device that supports both wavelength-level up and down waves and wavelength-band-level up and down waves is taken as an example. Take the wavelength-band-level up and down wave ports located on the wavelength-band-level optical switching module as an example. In Example 2, the wavelength channels with a switching demand of C+L spectrum are exchanged in 128 directions as an example. The number of wavelength channels is 60 wavelengths @ 200GHz. Example 2 takes the high- and low-order mixed scheduling of the wavelength band plane as an example, and evenly divides the C+L wavelength into 15 wavelength bands, namely wavelength bands B1, B2, ... B15, that is, corresponding to 15 wavelength band planes, each of which contains 4 wavelengths, forming a super channel (SuperChannel). Fig. 9 In the example, both the input-level optical module and the output-level optical module adopt WSS.

[0163] See also Fig. 9 As shown, the optical cross-connect device includes 128 input-level WSSs and 128 output-level WSSs, namely N h =128. The specification of the WSS at the input level is 1×15, and the specification of the WSS at the output level is 15×1, that is, M=15. The WSS at the input level is used to allocate each wavelength band. The WSS at the output level is used to collect each wavelength band. The optical cross-connection device also includes 15 wavelength-level optical switching modules with a specification of 256×256. The wavelength-level optical switching module can be called a switching matrix. In Example 2, the use of MEMS in the wavelength-level optical switching module is taken as an example. The optical cross-connection device also includes 15*6 wavelength-level optical switching modules, that is, t=6, M=q=q1=15. Fig. 9 In the example, a wavelength-level optical switching module B-WSS is used. The specification of B-WSS is 18×18, that is, K=18.

[0164] For each band plane: it contains 1 MEMS, and 128 ports are allocated as high-order ports for high-order scheduling. The 128 ports include 128 input ports as high-order input ports, and 128 output ports as high-order output ports. The other 128 ports are used as low-order ports for low-order scheduling, that is, N L = 128. Among them, 108 low-order ports of the 128 low-order ports are connected to 6 wavelength-level optical switching modules for wavelength-level optical switching, that is, N l =108. The remaining 20 ports of the 128 low-order ports are used as add / drop ports, connected to AM / DM for adding / dropping waves at the waveband level, that is, q2 = N L -N l = 20. For each 18x18 B-WSS, 16 ports are used for low-order scheduling, and the other 2 ports are used as wavelength-level add / drop ports for wavelength-level add / drop.

[0165] For example, MEMS can be directly interfaced with the input-stage WSS and output-stage WSS, B-WSS, AM / DM, etc. through an orthogonal architecture.

[0166] For each input-level WSS, different output ports correspond to different waveband planes, that is, they are connected to different MEMS. Each input-level WSS demultiplexes the received optical signal according to the waveband corresponding to each configured output port, and the service optical signals belonging to different wavebands are output through different output ports to be sent to different MEMS. For example, the 128 input-level WSSs are input-level WSS1 to input-level WSS128. Each WSS includes 15 output ports, namely output port 1 to output port 15, corresponding to waveband B1 to waveband B15, respectively. The 15 MEMSs are MEMS1 to MEMS15. The output port 1 of each of the 15 input-level WSSs is connected to MEMS1, and the output port 2 of each input-level WSS is connected to MEMS2, and so on. The output port 15 of each input-level WSS is connected to MEMS15.

[0167] For each MEMS, it supports receiving signals from 128 input-level WSSs, that is, 128 directional wavebands B1. The 128 high-order output ports of each of the 15 MEMS are connected to different output-level WSSs, that is, corresponding to 128 output directions. When each MEMS performs optical switching, the waveband signal of the high-order input port is switched to the corresponding high-order output port output according to the configuration relationship between the input direction and the output direction, that is, the switching relationship between the high-order input port and the high-order output port. In some other scenarios, the service optical signal of the waveband from one direction needs to be sent to at least two output directions. In this case, B-WSS is required to perform wavelength-level optical switching. In this case, the control device can control the MEMS to switch the optical switching mode. Taking MEMS1 as an example, for the four service optical signals λ1, λ2, λ3 and λ4 from the input stage WSS1 belonging to the band B1-1, and for the four service optical signals λ1′, λ2′, λ3′ and λ4′ from the input stage WSS2 belonging to the band B1-2, the wavelength-level service optical signals need to be exchanged. After the exchange, the band B1-1 includes λ1', λ2, λ3 and λ4, and the band B1-2 includes λ1, λ2′, λ3′ and λ4′. It can be understood that the above exchange is only used as an example, and it can be configured according to the needs.

[0168] For each MEMS, the waveband signal from a certain direction that needs to be dropped can be output to the drop module through the corresponding low-order output port, so that the drop module can send it to the corresponding local receiving module. For each MEMS, the waveband signal from a certain direction that needs to be uploaded is collected by the corresponding upload module and input to the MEMS through the corresponding low-order input port.

[0169] For each B-WSS, the wavelength band signal received from the input port can be split. After splitting, the service optical signal that needs to be dropped is sent out through the drop port. The split service optical signal and the service optical signal received through the add port are then multiplexed. After multiplexing, each wavelength band signal includes at most 4 service optical signals, and the wavelengths of the 4 service optical signals are different.

[0170] Compared with Example 1, Example 2 above adopts WSS as the optical module at the input and output stages, which can realize a flexible layout of the waveband (flex Grid).

[0171] Example 3:

[0172] See also Fig.10 As shown, it is a structural schematic diagram of an optical cross-interconnection device provided in an embodiment of the present application. In Example 1, an optical cross-interconnection device that supports both wavelength-level up and down waves and wavelength-band-level up and down waves is taken as an example. Take the wavelength-band-level up and down wave ports located on the wavelength-band-level optical switching module as an example. In Example 1, the wavelength channels with a switching demand of C+L spectrum are exchanged in 128 directions as an example. The number of wavelength channels is 80 wavelengths @ 150GHz. Example 1 takes the high- and low-order mixed scheduling of the wavelength band plane as an example, and evenly divides the C+L wavelength into 20 wavelength bands, namely wavelength bands B1, B2, ... B20, that is, corresponding to 20 wavelength band planes, each of which contains 4 wavelengths, forming a super channel (Super Channel). Fig.10 In the example, both the input-level optical module and the output-level optical module adopt WSS.

[0173] See also Fig.10 As shown, the optical cross-connect device includes 128 input-level WSSs and 128 output-level WSSs, namely N h=128. The specification of the WSS at the input level is 1×32, and the specification of the WSS at the output level is 32×1, that is, M=32. The WSS at the input level is used to allocate each wavelength band. The WSS at the output level is used to collect each wavelength band. The optical cross-connection device also includes 20 wavelength-level optical switching modules with a specification of 256×256. The wavelength-level optical switching module can be called a switching matrix. In Example 1, the use of MEMS in the wavelength-level optical switching module is taken as an example. The optical cross-connection device also includes 20*8 wavelength-level optical switching modules, that is, t=8, M>q. q=q1=20. Fig.10 In the figure, the wavelength-level optical switching module B-WSS is taken as an example. The specification of B-WSS is 18×18, that is, K=18. Of the 32 output ports of the input-level WSS, 20 output ports are used to connect with 20 MEMS in a one-to-one correspondence, and the remaining 12 ports are used as waveband-level drop-wave ports. Of the 32 input ports of the output-level WSS, 20 input ports are used to connect with 20 MEMS in a one-to-one correspondence, and the remaining 12 ports are used as waveband-level add-wave ports.

[0174] For each band plane: it contains 1 MEMS, and 128 ports are allocated as high-order ports for high-order scheduling. The 128 ports include 128 input ports as high-order input ports, and 128 output ports as high-order output ports. The other 128 ports are used as low-order ports for low-order scheduling, that is, N L = 128. Among them, 128 low-order ports are connected to 8 wavelength-level optical switching modules for wavelength-level optical switching, that is, N l = 128. For each 18×18B-WSS, 16 ports are used for low-order scheduling, and the other 2 ports are used as wavelength-level add / drop ports for wavelength-level add / drop.

[0175] For example, MEMS can be directly interfaced with the input-stage WSS and output-stage WSS, B-WSS, AM / DM, etc. through an orthogonal architecture.

[0176] For each input-level WSS, different output ports among the 20 output ports correspond to different waveband planes, that is, they are connected to different MEMS. The remaining 12 ports are used as waveband-level wavedrop ports. In some embodiments, each waveband-level wavedrop port supports any waveband of the 20 wavebands. In other embodiments, each waveband-level wavedrop port supports a waveband consisting of no more than 4 wavelengths. Each input-level WSS splits the received optical signal according to the waveband corresponding to each of the 20 configured output ports, and the service optical signals belonging to different wavebands are output through different output ports to be sent to different MEMS. For example, the 128 input-level WSSs are input-level WSS1 to input-level WSS128. The 20 output ports in each WSS are output port 1 to output port 20, corresponding to band B1 to band B20 respectively. The 20 MEMS are MEMS1 to MEMS20. Output port 1 of each of the 20 input-level WSSs is connected to MEMS1, output port 2 of each input-level WSS is connected to MEMS2, and so on. Output port 20 of each input-level WSS is connected to MEMS20.

[0177] For each MEMS, it supports receiving signals from 128 input-level WSSs, that is, 128 directional wavebands B1. The 128 high-order output ports of each of the 20 MEMS are connected to different output-level WSSs, corresponding to 128 output directions. When each MEMS performs optical switching, the waveband signal of the high-order input port is switched to the corresponding high-order output port output according to the configuration relationship between the input direction and the output direction, that is, the switching relationship between the high-order input port and the high-order output port. In some other scenarios, the service optical signal of the waveband from one direction needs to be sent to at least two output directions. In this case, B-WSS is required to perform wavelength-level optical switching. In this case, the control device can control the MEMS to switch the optical switching mode. Taking MEMS1 as an example, for the four service optical signals λ1, λ2, λ3 and λ4 from the input stage WSS1 belonging to the band B1-1, and for the four service optical signals λ1′, λ2′, λ3′ and λ4′ from the input stage WSS2 belonging to the band B1-2, the wavelength-level service optical signals need to be exchanged. After the exchange, the band B1-1 includes λ1', λ2, λ3 and λ4, and the band B1-2 includes λ1, λ2′, λ3′ and λ4′. It can be understood that the above exchange is only used as an example, and it can be configured according to the needs.

[0178] For each B-WSS, the wavelength band signal received from the input port can be split. After splitting, the service optical signal that needs to be dropped is sent out through the drop port. The split service optical signal and the service optical signal received through the add port are then multiplexed. After multiplexing, each wavelength band signal includes at most 4 service optical signals, and the wavelengths of the 4 service optical signals are different.

[0179] For each output level WSS, different input ports among the 20 input ports correspond to different waveband planes, that is, they are connected to different MEMS. The remaining 12 ports are used as waveband-level waveband ports. Each waveband-level waveband port supports any waveband of the 20 wavebands. Each output level WSS receives 20 configured input ports, and the wavebands corresponding to each input port belong to different service optical signals of the wavebands and are input through different input ports. For example, the 128 output level WSSs are output level WSS1 to output level WSS128. The 20 input ports in each WSS are input port 1 to input port 20, corresponding to waveband B1 to waveband B20 respectively. The 20 MEMSs are MEMS1 to MEMS20. The input port 1 of each output level WSS of the 20 output level WSSs is connected to MEMS1, the input port 2 of each output level WSS is connected to MEMS2, and so on. The input port 20 of each output level WSS is connected to MEMS20. The remaining 12 ports are used as waveband-level waveband ports. In some scenarios, the wavelength band of the upper wave corresponding to the wavelength band-level upper wave port corresponds to the wavelength band of the lower wave corresponding to the wavelength band-level lower wave port. In the same direction, the wavelength band of the upper wave is the same as the wavelength band of the lower wave to ensure that there is no conflict between the wavelengths of the service optical signals transmitted on the main optical path in one direction. In the optical cross-connection equipment, the 32 input ports in the output-level WSS only support the simultaneous reception of 20 wavelength band signals. The wavelengths of the service optical signals included in the 20 wavelength band signals do not overlap.

[0180] In the above example three, the WSS of the input stage and the output stage are configured with 12 ports for adding and dropping waves, which can realize flexible adding and dropping waves at the band level / cross-band. It does not need to go through B-WSS and MEMS, which reduces one link and can reduce the insertion loss of adding and dropping waves.

[0181] Based on the above embodiments, the present application also provides a communication method, which is applied to an optical cross-connection device, wherein the optical cross-connection device includes N h input-level optical modules, q waveband-level optical switching modules, q1 wavelength-level optical switching modules, and N h Output-level optical modules; N h , q and q1 are all positive integers, q1 is less than or equal to q; the first input-level optical module includes an input port and M output ports, and the first input-level optical module is the Nh Any one of the input-level optical modules; the M is a positive integer greater than or equal to q; each of the q waveband-level optical switching modules includes N h high-order input ports and N h high-order output ports, each of the q1 waveband-level optical switching modules also includes N L low-order input ports and N L low-order input ports, each of the q1 wavelength-level optical switching modules includes N l ' input ports and N l 'output port; the first output stage optical module comprises M input ports and an output port, the first output stage optical module is the N h Any one of the output-level optical modules;

[0182] N of each of the q waveband-level optical switching modules h The N high-order input ports are connected to the h The output ports of the input-level optical modules are connected one by one; each of the wavelength-band-level optical switching modules has N h High-order output ports and N h The input ports of the output-level optical modules are connected one-to-one; the q1 wavelength-level switching modules correspond one-to-one to the q1 wavelength-band-level optical switching modules;

[0183] q1 wavelength-level optical switching modules N in each wavelength-level optical switching module l low-order input ports and N in a wavelength-level optical switching module l The output ports are connected one by one, and different wavelength-level optical switching modules are connected to different wavelength-level optical switching modules. l The low-order output ports and the N l The input ports are connected one by one; N l Less than or equal to N l ',N l Less than or equal to N L .

[0184] See also Fig.11 FIG. 1 is a flow chart of a communication method. The method comprises:

[0185] 1101. Demultiplex a received optical signal into at least one wavelength band signal through a first input-level optical module, and couple different wavelength band signals in the at least one wavelength band signal to high-order input ports of different wavelength band-level optical switching modules; each wavelength band signal in the at least one wavelength band signal includes a service optical signal of at least one wavelength; wavelengths of service optical signals included in different wavelength band signals do not overlap; and the at least one wavelength band signal includes a first wavelength band signal.

[0186] 1102, switching a first waveband signal input from a first high-order input port to a first high-order output port or a first low-order output port through a first waveband-level optical switching module among the q1 waveband-level optical switching modules;

[0187] 1103. When the first wavelength-level optical switching module outputs the first wavelength-band signal from the first high-order output port, at least one wavelength-band signal received is multiplexed into one optical signal through the first output-level optical module and then sent out. The first output-level optical module is connected to the first wavelength-level optical switching module through the first high-order output port, and at least one wavelength-band signal received by the first output-level optical module includes the first wavelength-band signal.

[0188] 1104. When the first waveband-level optical switching module outputs the first waveband signal from a first low-order output port, the first waveband signal is switched to at least two low-order input ports of the first waveband-level optical switching module through the first wavelength-level optical switching module.

[0189] 1105. The wavelength signal received from the first low-order input port is exchanged to the second high-order output port through the first wavelength-level optical switching module, and outputted by connecting the second output-level optical module to the second high-order output port; the first low-order input port is any one of the at least two low-order output ports.

[0190] In a possible implementation, the q wavelength-level optical switching modules correspond one-to-one to q wavelength planes; wherein different wavelength-band signals belonging to the same wavelength-band plane come from different input-level optical modules, and the wavelengths of the service optical signals included in the different wavelength-band signals belonging to the same wavelength-band are the same.

[0191] In a possible implementation manner, the N L Greater than N l The device also includes: q*q2 wave dropping modules and q*q2 wave adding modules, q2=N L -N l ;

[0192] The q2 low-order input ports of each of the q1 waveband-level optical switching modules are connected to the q2 wave modules in a one-to-one correspondence, and different waveband-level optical switching modules are connected to different wave modules; the q2 low-order output ports of each of the q1 waveband-level optical switching modules are connected to the q2 wave modules in a one-to-one correspondence, and different waveband-level optical switching modules are connected to different wave modules;

[0193] The method further comprises:

[0194] Receive a second wavelength signal from a second low-order output port of the first wavelength-level optical switching module through a first drop-wave module, and output the second wavelength signal including a service optical signal of at least one wavelength; or,

[0195] A third waveband signal is received through a first waveband module, and the third waveband signal is input to a second low-order input port of the first waveband-level optical switching module; and the third waveband signal received from the second low-order input port is switched to a third output-level optical module for output through the first waveband-level optical switching module.

[0196] In a possible implementation manner, N in the first wavelength level optical switching module l '-N l Wavelength-adding ports and N l '-N l Wavelength drop ports;

[0197] The method further comprises:

[0198] A first service optical signal is received through a first upstream port of the first wavelength-level optical switching module, and the first service optical signal is exchanged to a third low-order input port of the first wavelength-level optical switching module; and a fourth wavelength-band signal input from the third low-order input port is exchanged to a fourth output-level optical module through the first wavelength-level optical switching module, and the fourth wavelength-band signal is output through the fourth output-level optical module; the fourth wavelength-band signal includes the first service optical signal; or

[0199] The second service optical signal in the fifth wavelength band signal from the third low-order output port is switched to the first drop wave port for output through the first wavelength level optical switching module.

[0200] In a possible implementation manner, M is greater than q, and the device further includes N h *(Mq) wave module and N h *(Mq) wave modules;

[0201] The N hThe Mq output ports of each input-level optical module in the N input-level optical modules are used as drop-wave ports, and the Mq drop-wave ports are connected to the Mq drop-wave modules in a one-to-one correspondence; h The Mq input ports of the first output-stage optical module in the output-stage optical modules are used as add-on ports, and the Mq add-on ports are connected to the Mq add-on modules in a one-to-one correspondence;

[0202] The method further comprises:

[0203] The sixth waveband signal in the at least one waveband signal is output to the second drop wave module through the first input stage optical module, and the sixth waveband signal including at least one service optical signal is output through the second drop wave module. The second drop wave module is the N h *One of (Mq) wave modules; or,

[0204] The seventh wavelength band signal is received through the second add-wave module and sent to the first output-stage optical module, so as to be output through the first output-stage optical module, wherein the seventh wavelength band signal includes at least one service optical signal.

[0205] In a possible implementation manner, switching the waveband signal input from the first high-order input port to the first low-order output port by using the first waveband-level optical switching module includes:

[0206] In the first optical switching mode, the first band-level optical switching module is controlled to switch the band signal input from the first high-order input port to the first low-order output port.

[0207] In a possible implementation manner, switching the waveband signal input from the first high-order input port to the first high-order output port by using the first waveband-level optical switching module includes:

[0208] In the second optical switching mode, the first waveband-level optical switching module is controlled to switch the waveband signal input from the first high-order input port to the first high-order output port.

[0209] One embodiment of the present application provides a computer readable medium for storing a computer program, the computer program comprising a computer program for executing Fig.11 Instructions of the method steps in the corresponding method embodiment.

[0210] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, optical storage, etc.) that contain computer-usable program code.

[0211] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0212] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. An optical cross-connection device, characterized in that: include: N h input-level optical modules, q waveband-level optical switching modules, q1 wavelength-level optical switching modules, and N h Output-level optical modules; N h , q and q1 are all positive integers, q1 is less than or equal to q; the first input-level optical module includes an input port and M output ports, and the first input-level optical module is the N h Any one of the input-level optical modules; the M is a positive integer greater than or equal to q; each of the q waveband-level optical switching modules includes N h high-order input ports and N h high-order output ports, each of the q1 waveband-level optical switching modules also includes N L low-order input ports and N L low-order input ports, each of the q1 wavelength-level optical switching modules includes N l ' input ports and N l 'output port; the first output stage optical module comprises M input ports and an output port, the first output stage optical module is the N h Any one of the output-level optical modules; N of each of the q waveband-level optical switching modules h The N high-order input ports are connected to the h The output ports of the input-level optical modules are connected one by one; each of the wavelength-band-level optical switching modules has N h High-order output ports and N h The input ports of the output-level optical modules are connected one-to-one; the q1 wavelength-level switching modules correspond one-to-one to the q1 wavelength-band-level optical switching modules; q1 wavelength-level optical switching modules N in each wavelength-level optical switching module l low-order input ports and N in a wavelength-level optical switching module l The output ports are connected one by one, and different wavelength-level optical switching modules are connected to different wavelength-level optical switching modules. l The low-order output ports and the N l The input ports are connected one by one; N l Less than or equal to N l ',N l Less than or equal to N L ; The first input-level optical module is used to demultiplex the received optical signal into at least one wavelength band signal, and couple different wavelength band signals in the at least one wavelength band signal to high-order input ports of different wavelength band-level optical switching modules; each wavelength band signal in the at least one wavelength band signal includes a service optical signal of at least one wavelength; and the wavelengths of the service optical signals included in different wavelength band signals do not overlap; A first waveband-level optical switching module, used for switching the waveband signal input from the first high-order input port to the first high-order output port or the first low-order output port; the first waveband-level optical switching module is any one of the q1 waveband-level optical switching modules; the first high-order input port is any high-order input port of the first waveband-level optical switching module; the first wavelength-level optical switching module is connected to the first waveband-level optical switching module; The first wavelength-level optical switching module is used to switch the wavelength-band signal from the first low-order output port to at least two low-order input ports of the first wavelength-level optical switching module; The first waveband-level optical switching module is further used to switch the waveband signal received from the first low-order input port to the second high-order output port; the first low-order input port is any one of the at least two low-order output ports; The first output-level optical module is used to multiplex the received multiple wavelength band signals into one optical signal and then send it out. The multiple wavelength band signals received by the first output-level optical module include at least one wavelength band signal from at least one wavelength band level optical switching module.

2. The device according to claim 1, characterized in that The q waveband-level optical switching modules correspond one-to-one to the q waveband planes; different waveband signals belonging to the same waveband plane come from different input-level optical modules, and the wavelengths of the service optical signals included in the different waveband signals belonging to the same waveband plane belong to the same waveband.

3. The device according to claim 1 or 2, characterized in that The first wavelength-level optical switching module includes t1 wavelength-level optical switching sub-modules, the first wavelength-level optical switching sub-module includes K1 input ports and K1 output ports, the t1 wavelength-level optical switching sub-modules in the first wavelength-level optical switching module are respectively connected to the first waveband-level optical switching module, t1 is a positive integer, t1*K1=N l '.

4. The device according to claim 3, characterized in that The t1*K1 is greater than N l , the p output ports in the first wavelength-level optical switching submodule are used as drop-wave ports, and the drop-wave ports are used to output service optical signals of a single wavelength, and the p input ports in the wavelength-level optical switching submodule are used as add-wave ports, and the add-wave ports are used to receive service optical signals of a single wavelength; p = K1-N l / t1.

5. The device according to claim 3 or 4, characterized in that The second wavelength-level optical switching module includes t2 wavelength-level optical switching sub-modules, the second wavelength-level optical switching sub-module includes K2 input ports and K2 output ports, the second wavelength-level optical switching module is a wavelength-level optical switching module connected to the second wavelength-level optical switching module among the q1 wavelength-level optical switching modules; the second wavelength-level optical switching module is any wavelength-level optical switching module among the q1 wavelength-level optical switching modules except the first wavelength-level optical switching module, the t2 wavelength-level optical switching sub-modules in the second wavelength-level optical switching module are respectively connected to the second wavelength-level optical switching module, t2 is a positive integer, t2*K2=N l '.

6. The device according to any one of claims 3 to 5, characterized in that: The wavelength-level optical switching submodule is a wavelength selective switch WSS.

7. The device according to any one of claims 1 to 6, characterized in that: The N L Greater than N l The device also includes: q*q2 wave dropping modules and q*q2 wave adding modules, q2=N L -N l ; The q2 low-order input ports of each of the q1 waveband-level optical switching modules are connected to the q2 wave modules in a one-to-one correspondence, and different waveband-level optical switching modules are connected to different wave modules; the q2 low-order output ports of each of the q1 waveband-level optical switching modules are connected to the q2 wave modules in a one-to-one correspondence, and different waveband-level optical switching modules are connected to different wave modules; The first waveband drop module among the q*q2 waveband drop modules is connected to the second low-order output port of the first waveband-level optical switching module, and is used to output the waveband signal from the second low-order output port including a service optical signal of at least one wavelength; The first wavelet adder module among the q*q2 wavelet adder modules is connected to the second low-order input port of the first waveband-level optical switching module, and is used for multiplexing the received service optical signals of multiple wavelengths into one waveband signal and then outputting it to the second low-order input port; The first waveband-level optical switching module is further used to switch the waveband signal received from the second low-order input port to a second high-order output port corresponding to the second low-order input port for output.

8. The device according to any one of claims 1 to 6, characterized in that: M is greater than q, the device further comprises N h *(Mq) wave module and N h *(Mq) wave modules; The N h The Mq output ports of each input-level optical module in the N input-level optical modules are used as drop-wave ports, and the Mq drop-wave ports are connected to the Mq drop-wave modules in a one-to-one correspondence; the first input-level optical module is also used to output the first waveband signal in the at least one waveband signal to the second drop-wave module; the second drop-wave module is the N h *One of (Mq) down-wave modules; The N h The Mq input ports of the first output-level optical module in the output-level optical modules are used as add-on ports, and the Mq add-on ports are connected to the Mq add-on modules in a one-to-one correspondence; the multiple waveband signals received by the first output-level optical module also include at least one waveband signal from at least one add-on module in the Mq add-on modules connected to the first output-level optical module.

9. The device according to any one of claims 1 to 8, characterized in that The device further comprises a control module, wherein the control module sends a first control signal to the q waveband-level optical switching modules, wherein the first control signal is used to control the q waveband-level optical switching modules to be in a first optical switching mode; The first waveband-level optical switching module is specifically configured to switch the waveband signal input from the first high-order input port to the first low-order output port in the first optical switching mode.

10. The device according to claim 9, characterized in that The control module is further used to send a second control signal to the q waveband-level optical switching modules, wherein the second control signal is used to control the q waveband-level optical switching modules to be in a second optical switching mode; The first waveband-level optical switching module is specifically configured to switch the waveband signal input from the first high-order input port to the first high-order output port in the second optical switching mode.

11. The device according to any one of claims 1 to 10, characterized in that The input-stage optical module is a wavelength selective switch WSS or an arrayed waveguide grating AWG.

12. The device according to any one of claims 1 to 11, characterized in that The output-stage optical module is a wavelength selective switch WSS or an arrayed waveguide grating AWG.

13. The device according to any one of claims 1 to 12, characterized in that The band-level optical switching module is a micro-electromechanical system MEMS.

14. A communication system, characterized in that: The communication system at least includes the optical cross-connection device according to any one of claims 1-13.

15. A communication method, characterized in that: include: Applicable to an optical cross-connection device, the optical cross-connection device includes N h input-level optical modules, q waveband-level optical switching modules, q1 wavelength-level optical switching modules, and N h Output-level optical modules; N h , q and q1 are all positive integers, q1 is less than or equal to q; the first input-level optical module includes an input port and M output ports, and the first input-level optical module is the N h Any one of the input-level optical modules; the M is a positive integer greater than or equal to q; each of the q waveband-level optical switching modules includes N h high-order input ports and N h high-order output ports, each of the q1 waveband-level optical switching modules also includes N L low-order input ports and N L low-order input ports, each of the q1 wavelength-level optical switching modules includes N l ' input ports and N l 'output port; the first output stage optical module comprises M input ports and an output port, the first output stage optical module is the N h Any one of the output-level optical modules; N of each of the q waveband-level optical switching modules h The N high-order input ports are connected to the h The output ports of the input-level optical modules are connected one by one; each of the wavelength-band-level optical switching modules has N h High-order output ports and N h The input ports of the output-level optical modules are connected one-to-one; the q1 wavelength-level switching modules correspond one-to-one to the q1 wavelength-band-level optical switching modules; q1 wavelength-level optical switching modules N in each wavelength-level optical switching module l low-order input ports and N in a wavelength-level optical switching module l The output ports are connected one by one, and different wavelength-level optical switching modules are connected to different wavelength-level optical switching modules. l The low-order output ports and the N l The input ports are connected one by one; N l Less than or equal to N l ',N l Less than or equal to N L ; The method comprises: Demultiplexing the received optical signal into at least one wavelength band signal through a first input-level optical module, and coupling different wavelength band signals in the at least one wavelength band signal to high-order input ports of different wavelength band-level optical switching modules; each wavelength band signal in the at least one wavelength band signal includes a service optical signal of at least one wavelength; wavelengths of service optical signals included in different wavelength band signals do not overlap; the at least one wavelength band signal includes a first wavelength band signal; Switching the first waveband signal input from the first high-order input port to the first high-order output port or the first low-order output port through the first waveband-level optical switching module among the q1 waveband-level optical switching modules; When the first waveband-level optical switching module outputs the first waveband signal from the first high-order output port, the first output-level optical module multiplexes at least one received waveband signal into one optical signal and then sends it out, the first output-level optical module is connected to the first waveband-level optical switching module through the first high-order output port, and the at least one waveband signal received by the first output-level optical module includes the first waveband signal; When the first wavelength-level optical switching module outputs the first wavelength-level optical switching module from the first low-order output port, the first wavelength-level optical switching module switches the first wavelength-level optical switching module to at least two low-order input ports of the first wavelength-level optical switching module; the first wavelength-level optical switching module switches the wavelength-level signal received from the first low-order input port to the second high-order output port, and outputs the signal through the second output-level optical module connected to the second high-order output port; the first low-order input port is any one of the at least two low-order output ports.

16. The method according to claim 15, characterized in that The q waveband-level optical switching modules correspond one-to-one to the q waveband planes; different waveband signals belonging to the same waveband plane come from different input-level optical modules, and the wavelengths of the service optical signals included in the different waveband signals belonging to the same waveband plane belong to the same waveband.

17. The method according to claim 15 or 16, characterized in that The N L Greater than N l The device also includes: q*q2 wave dropping modules and q*q2 wave adding modules, q2=N L -N l ; The q2 low-order input ports of each of the q1 waveband-level optical switching modules are connected to the q2 wave modules in a one-to-one correspondence, and different waveband-level optical switching modules are connected to different wave modules; the q2 low-order output ports of each of the q1 waveband-level optical switching modules are connected to the q2 wave modules in a one-to-one correspondence, and different waveband-level optical switching modules are connected to different wave modules; The method further comprises: Receive a second wavelength signal from a second low-order output port of the first wavelength-level optical switching module through a first drop-wave module, and output the second wavelength signal including a service optical signal of at least one wavelength; or, A third waveband signal is received through a first waveband module, and the third waveband signal is input to a second low-order input port of the first waveband-level optical switching module; and the third waveband signal received from the second low-order input port is switched to a third output-level optical module for output through the first waveband-level optical switching module.

18. The method according to any one of claims 15 to 17, characterized in that: The N of the first wavelength-level optical switching modules l '-N l Wavelength-adding ports and N l '-N l Wavelength drop ports; The method further comprises: A first service optical signal is received through a first upstream port of the first wavelength-level optical switching module, and the first service optical signal is exchanged to a third low-order input port of the first wavelength-level optical switching module; and a fourth wavelength-band signal input from the third low-order input port is exchanged to a fourth output-level optical module through the first wavelength-level optical switching module, and the fourth wavelength-band signal is output through the fourth output-level optical module; the fourth wavelength-band signal includes the first service optical signal; or The second service optical signal in the fifth wavelength band signal from the third low-order output port is switched to the first drop wave port for output through the first wavelength level optical switching module.

19. The method according to any one of claims 15 to 17, characterized in that: M is greater than q, the device further comprises N h *(Mq) wave module and N h *(Mq) wave modules; The N h The Mq output ports of each input-level optical module in the N input-level optical modules are used as drop-wave ports, and the Mq drop-wave ports are connected to the Mq drop-wave modules in a one-to-one correspondence; h The Mq input ports of the first output-stage optical module in the output-stage optical modules are used as add-on ports, and the Mq add-on ports are connected to the Mq add-on modules in a one-to-one correspondence; The method further comprises: The sixth waveband signal in the at least one waveband signal is output to the second drop wave module through the first input stage optical module, and the sixth waveband signal including at least one service optical signal is output through the second drop wave module. The second drop wave module is the N h *One of (Mq) wave modules; or, The seventh wavelength band signal is received through the second add-wave module and sent to the first output-stage optical module, so as to be output through the first output-stage optical module, wherein the seventh wavelength band signal includes at least one service optical signal.

20. The method according to any one of claims 15 to 19, characterized in that: Switching the waveband signal input from the first high-order input port to the first low-order output port through the first waveband-level optical switching module includes: In the first optical switching mode, the first band-level optical switching module is controlled to switch the band signal input from the first high-order input port to the first low-order output port.

21. The method of claim 20, wherein: Switching the waveband signal input from the first high-order input port to the first high-order output port through the first waveband-level optical switching module includes: In the second optical switching mode, the first band-level optical switching module is controlled to switch the band signal input from the first high-order input port to the first high-order output port.

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