Distributed all-optical cross cluster system

Abstract

The invention relates to a distributed all-optical cross cluster system, which comprises a plurality of optical cross connection subsystems, each optical cross connection subsystem is provided with a transmitting side optical adapter and a receiving side optical adapter, the plurality of optical cross connection subsystems are mutually connected through the transmitting side optical adapters and the receiving side optical adapters, and the transmitting side optical adapters and the receiving side optical adapters are mutually connected through the transmitting side optical adapters and the receiving side optical adapters. And the transmitting side optical adapter of one optical cross connection subsystem is connected with the receiving side optical adapter of the other optical cross connection subsystem. Through simple and flexible configuration, the high-dimensional optical cross connection subsystem cluster is realized by using the low-dimensional optical cross connection subsystem in a distributed cluster mode, the expandability of the optical cross connection subsystem is enhanced, connection through a central cross sub-frame is not needed, the operation and maintenance cost can be reduced, the system utilization efficiency is improved, and the system performance is improved. And the expansion capability of the system is not limited by the capability of the central sub-frame.

Description

Technical Field

[0001] This application relates to the field of optical communication technologies, and particularly to a distributed all-optical cross-connect cluster system. Background Art

[0002] With the continuous upgrade of network scale and channel rate, and the increasing richness of service data types, supported by large-scale integrated circuit technologies with continuously improving performance, the single-device capacity of equipment for time-division multiplexing cross-scheduling has also reached more than 64 Tbit / s. In traditional optical communication networks based on optical transmission and electrical cross-connects, electrical cross-scheduling first converts optical signals into electrical signals, completes service grooming in the time domain through an electrical cross-processing chip, and then converts the electrical signals back into optical signals. With the rapid growth of wavelength channel rate and electrical cross-connect capacity, the above-mentioned opto-electro-opto conversion process increases the network construction cost, and the continuously increasing power consumption of electrical cross-connect equipment also brings great pressure to the power supply and heat dissipation of computer rooms. The industry hopes to introduce optical cross-connect nodes with network wavelength resource scheduling and management capabilities on the basis of the traditional electrical cross-scheduling capabilities of time-division multiplexing, and to realize an all-optical network on the basis of point-to-point WDM (Wavelength Division Multiplexing) optical transmission in the early stage, so as to reduce the cross-scheduling power consumption, cost and latency, and improve the system integration and flexibility.

[0003] In related technologies, due to the immaturity of optical logic, optical storage and wavelength conversion devices, it is impossible to perform all-optical cross-connect and scheduling on optical signals in the time domain and frequency domain. Most currently commercial all-optical cross-connect devices are space optical line switches, and their core unit is an optical switch device with wavelength selection capabilities. OXC (Optical Cross-connect) devices with wavelength selection cross-scheduling and add / drop channel functions generally use WSS (Wavelength Selective Switch) modules for all-optical cross-connect. However, limited by factors such as materials, processes, and performance, the number of ports of WSS devices is below 48 dimensions, which cannot meet the requirements of future network meshing for higher cross-scheduling dimensions.

[0004] In order to implement larger-scale OXC devices, most traditional implementation schemes use a central cross-connect sub-frame with a larger capacity and port specification to connect multiple OXC devices with smaller capacities and port specifications to achieve an expansion of the OXC cross-connect capacity and port specification. However, this cluster expansion method based on a central cross-connect sub-frame has high construction and operation and maintenance costs, low system utilization efficiency, and the system expansion ability is limited by the capabilities of the central sub-frame.

[0005] Therefore, it is necessary to design a new distributed all-optical cross-connect cluster system to overcome the above problems. Summary of the Invention

[0006] The present application provides a distributed all-optical cross-connect cluster system, which can solve the technical problems in the related art that the number of ports of the WSS device cannot meet the requirements of the future network meshing for higher cross-scheduling dimensions, and the cluster expansion method based on the central cross-connect sub-frame has high cost, low efficiency and the expansion ability is limited by the central sub-frame.

[0007] In a first aspect, an embodiment of the present application provides a distributed all-optical cross-connect cluster system, which includes: a plurality of optical cross-connect subsystems, each of the optical cross-connect subsystems has a transmitting-side optical adapter and a receiving-side optical adapter, and the plurality of optical cross-connect subsystems are interconnected through the transmitting-side optical adapter and the receiving-side optical adapter, and the transmitting-side optical adapter of one of the optical cross-connect subsystems is connected to the receiving-side optical adapter of another optical cross-connect subsystem.

[0008] In combination with the first aspect, in an implementation manner, each of the optical cross-connect subsystems has a plurality of transmitting-side optical waveguides, a plurality of receiving-side optical waveguides and a plurality of port mapping optical backplanes; in each of the optical cross-connect subsystems, the transmitting-side optical waveguides are connected to the corresponding transmitting-side optical adapters in the optical cross-connect subsystem, the receiving-side optical waveguides are connected to the corresponding receiving-side optical adapters in the optical cross-connect subsystem through the corresponding port mapping optical backplanes, and the transmitting-side optical waveguides are connected to the receiving-side optical waveguides through the port mapping optical backplanes.

[0009] In combination with the first aspect, in an implementation manner, the transmitting-side optical waveguides have a plurality of transmitting-side output optical ports, and the receiving-side optical waveguides have a plurality of receiving-side input optical ports; if S_x is the xth transmitting-side optical waveguide, T_y is the yth transmitting-side output optical port of the xth transmitting-side optical waveguide; S_y is the yth receiving-side optical waveguide, and T_x is the xth receiving-side input optical port of the yth receiving-side optical waveguide, then the yth transmitting-side output optical port T_y of the xth transmitting-side optical waveguide is connected to the xth receiving-side input optical port T_x of the yth receiving-side optical waveguide.

[0010] In combination with the first aspect, in an implementation manner, the kth transmitting-side optical adapter TC_ik in the ith optical cross-connect subsystem is connected to the ith receiving-side optical adapter RC_ki in the kth optical cross-connect subsystem; the ith transmitting-side optical adapter TC_ki in the kth optical cross-connect subsystem is connected to the kth receiving-side optical adapter RC_ik in the ith optical cross-connect subsystem; where i and k are both positive integers, and i≠k.

[0011] In combination with the first aspect, in one embodiment, the transmitting - side optical adapter includes an internal transmitting - side optical adapter and an external transmitting - side optical adapter, and the receiving - side optical adapter includes an internal receiving - side optical adapter and an external receiving - side optical adapter; the internal transmitting - side optical adapter and the internal receiving - side optical adapter within each optical cross - connection subsystem are interconnected; between multiple optical cross - connection subsystems, they are interconnected through the external transmitting - side optical adapter and the external receiving - side optical adapter.

[0012] In combination with the first aspect, in one embodiment, each optical cross - connection subsystem has a transmitting - side optical waveguide, a receiving - side optical waveguide, and a port - mapping optical backplane; in each optical cross - connection subsystem, the transmitting - side optical waveguide connects the external transmitting - side optical adapter and the internal transmitting - side optical adapter, the internal receiving - side optical adapter is connected to the receiving - side optical waveguide through the port - mapping optical backplane, and the receiving - side optical waveguide connects the external receiving - side optical adapter.

[0013] In combination with the first aspect, in one embodiment, the multiple optical cross - connection subsystems include a first optical cross - connection subsystem, a second optical cross - connection subsystem, and a third optical cross - connection subsystem. The external transmitting - side optical adapter includes an external transmitting - side input optical adapter and an external transmitting - side output optical adapter, and the external receiving - side optical adapter includes an external receiving - side input optical adapter and an external receiving - side output optical adapter; the external transmitting - side output optical adapter of the first optical cross - connection subsystem is connected to the external transmitting - side input optical adapter of the second optical cross - connection subsystem, and the external receiving - side input optical adapter of the first optical cross - connection subsystem is connected to the external receiving - side output optical adapter of the second optical cross - connection subsystem; the internal transmitting - side optical adapter of the second optical cross - connection subsystem is connected to the internal receiving - side optical adapter of the third optical cross - connection subsystem, and the internal receiving - side optical adapter of the second optical cross - connection subsystem is connected to the internal transmitting - side optical adapter of the third optical cross - connection subsystem.

[0014] In combination with the first aspect, in one embodiment, the multiple optical cross - connection subsystems further include a fourth optical cross - connection subsystem. The external transmitting - side output optical adapter of the fourth optical cross - connection subsystem is connected to the external transmitting - side input optical adapter of the third optical cross - connection subsystem, and the external receiving - side input optical adapter of the fourth optical cross - connection subsystem is connected to the external receiving - side output optical adapter of the third optical cross - connection subsystem.

[0015] In combination with the first aspect, in one embodiment, the distributed all - optical cross - connection cluster system further includes an optical cross - connection expansion subsystem, and the optical cross - connection expansion subsystem connects two optical cross - connection subsystems.

[0016] In combination with the first aspect, in one embodiment, the optical cross-connect expansion subsystem is provided with a plurality of transmitting-side expansion optical adapters and a plurality of receiving-side expansion optical adapters. The optical cross-connect expansion subsystem is connected to one of the optical cross-connect subsystems through some of the transmitting-side expansion optical adapters and some of the receiving-side expansion optical adapters; and the optical cross-connect expansion subsystem is connected to another optical cross-connect subsystem through another part of the transmitting-side expansion optical adapters and another part of the receiving-side expansion optical adapters.

[0017] The beneficial effects brought by the technical solutions provided in the embodiments of the present application include:

[0018] By providing a transmitting-side optical adapter and a receiving-side optical adapter in each optical cross-connect subsystem, multiple optical cross-connect subsystems can be directly interconnected through the transmitting-side optical adapters and receiving-side optical adapters thereon. Through simple and flexible configuration, low-dimensional optical cross-connect subsystems can be used to implement a high-dimensional optical cross-connect subsystem cluster in a distributed cluster manner, enhancing the scalability of the optical cross-connect subsystem. Moreover, it does not need to be connected through a central cross-connect sub-frame, which can reduce the operation and maintenance cost, improve the system utilization efficiency, and the expansion ability of the system is not limited by the ability of the central sub-frame, solving the technical problem in the related art that the number of ports of WSS devices cannot meet the demand for higher cross-scheduling dimensions for the future network meshing, and the cluster expansion method based on the central cross-connect sub-frame has high cost, low efficiency and the expansion ability is limited by the central sub-frame. Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 Among them, (a) is a schematic diagram of a distributed all-optical cross-connect cluster system including two subsystems provided by the embodiment of the present application, (b) is a schematic diagram of a distributed all-optical cross-connect cluster system including three subsystems provided by the embodiment of the present application, and (c) is a schematic diagram of a distributed all-optical cross-connect cluster system including four subsystems provided by the embodiment of the present application;

[0021] Figure 2 is an external interface schematic diagram of the optical cross-connect subsystem OXC_i provided by the embodiment of the present application;

[0022] Figure 3 is an internal structure schematic diagram of the optical cross-connect subsystem OXC_i provided by the embodiment of the present application;

[0023] Figure 4 Among them, (a) is a schematic diagram of four other optical cross-connect subsystems OXC_i provided by an embodiment of the present application, (b) is a schematic diagram of the structure of another distributed all-optical cross-connect cluster system provided by an embodiment of the present application, and (c) is a schematic diagram of the structure of yet another distributed all-optical cross-connect cluster system provided by an embodiment of the present application;

[0024] Figure 5 It is a schematic diagram of the structure of a distributed all-optical cross-connect cluster system adopting an optical cross-connect expansion subsystem OXE provided by an embodiment of the present application. Detailed implementation manners

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0026] An embodiment of the present application provides a distributed all-optical cross-connect cluster system, which can solve the technical problems in the related art that the number of ports of the WSS device cannot meet the demand for higher cross-scheduling dimensions for the future network meshing, and the cluster expansion method based on the central cross-subframe has high cost, low efficiency and the expansion ability is limited by the central subframe.

[0027] See Figure 1 As shown, a distributed all-optical cross-connect cluster system provided by an embodiment of the present application may include: a plurality of optical cross-connect subsystems, each of the optical cross-connect subsystems has a transmitting-side optical adapter and a receiving-side optical adapter, and the plurality of optical cross-connect subsystems are interconnected through the transmitting-side optical adapter and the receiving-side optical adapter, and the transmitting-side optical adapter of one of the optical cross-connect subsystems is connected to the receiving-side optical adapter of another optical cross-connect subsystem.

[0028] In this embodiment, an N×N distributed all-optical cross-connect cluster system may be composed of m distributed clusters of N_i×N_i optical cross-connect subsystems (i.e., OXC_i subsystems), where OXC_i supports all-optical cross-connection with an N_i×N_i line specification, and m is a positive integer greater than 1. See Figure 2 As shown, an optical cross-connect subsystem (i.e., an OXC_i subsystem) includes N_i transmitting-side optical adapters TC_ij (j = 1…i - 1, i + 1…m) and N_i receiving-side optical adapters RC_ij (j = 1…i - 1, i + 1…m).

[0029] See Figure 1 As shown, the transmitting optical adapter of the transmitting side of an optical cross-connect subsystem is connected to the receiving optical adapter of the receiving side of another optical cross-connect subsystem, and the receiving optical adapter of the previous optical cross-connect subsystem is also connected to the transmitting optical adapter of another optical cross-connect subsystem. See Figure 1 (a) As shown, for a distributed all-optical cross-connect cluster system composed of two optical cross-connect subsystems OXC_1 and OXC_2, TC_12 is the transmitting optical adapter of the transmitting side of the optical cross-connect subsystem OXC_1, and RC_12 is the receiving optical adapter of the receiving side of the optical cross-connect subsystem OXC_1; TC_21 is the transmitting optical adapter of the transmitting side of the optical cross-connect subsystem OXC_2, and RC_21 is the receiving optical adapter of the receiving side of the optical cross-connect subsystem OXC_2; in this distributed all-optical cross-connect cluster system, the connection relationship between the optical cross-connect subsystem OXC_1 and the optical cross-connect subsystem OXC_2 is: the transmitting optical adapter TC_12 of the optical cross-connect subsystem OXC_1 is connected to the receiving optical adapter RC_21 of the optical cross-connect subsystem OXC_2; the transmitting optical adapter TC_21 of the optical cross-connect subsystem OXC_2 is connected to the receiving optical adapter RC_12 of the optical cross-connect subsystem OXC_1.

[0030] See Figure 1As shown in (b), for a distributed all-optical cross-connect cluster system composed of three optical cross-connect subsystems OXC_1, OXC_2, and OXC_3. TC_12 and TC_13 are the transmitting-side optical adapters of the optical cross-connect subsystem OXC_1, and RC_12 and RC_13 are the receiving-side optical adapters of the optical cross-connect subsystem OXC_1; TC_21 and TC_23 are the transmitting-side optical adapters of the optical cross-connect subsystem OXC_2, and RC_21 and RC_23 are the receiving-side optical adapters of the optical cross-connect subsystem OXC_2; TC_31 and TC_32 are the transmitting-side optical adapters of the optical cross-connect subsystem OXC_3, and RC_31 and RC_32 are the receiving-side optical adapters of the optical cross-connect subsystem OXC_3; in this distributed all-optical cross-connect cluster system, the connection relationships of the optical cross-connect subsystems OXC_1, OXC_2, and OXC_3 are as follows: the transmitting-side optical adapter TC_12 of the optical cross-connect subsystem OXC_1 is connected to the receiving-side optical adapter RC_21 of the optical cross-connect subsystem OXC_2; the transmitting-side optical adapter TC_13 of the optical cross-connect subsystem OXC_1 is connected to the receiving-side optical adapter RC_31 of the optical cross-connect subsystem OXC_3; the transmitting-side optical adapter TC_21 of the optical cross-connect subsystem OXC_2 is connected to the receiving-side optical adapter RC_12 of the optical cross-connect subsystem OXC_1; the transmitting-side optical adapter TC_23 of the optical cross-connect subsystem OXC_2 is connected to the receiving-side optical adapter RC_32 of the optical cross-connect subsystem OXC_3; the transmitting-side optical adapter TC_31 of the optical cross-connect subsystem OXC_3 is connected to the receiving-side optical adapter RC_13 of the optical cross-connect subsystem OXC_1; the transmitting-side optical adapter TC_32 of the optical cross-connect subsystem OXC_3 is connected to the receiving-side optical adapter RC_23 of the optical cross-connect subsystem OXC_2.

[0031] See Figure 1(c) As shown, for a distributed all-optical cross-connect cluster system composed of four optical cross-connect subsystems OXC_1, OXC_2, OXC_3, and OXC_4. TC_12, TC_13, and TC_14 are the transmitting-side optical adapters of the optical cross-connect subsystem OXC_1, and RC_12, RC_13, and RC_14 are the receiving-side optical adapters of the optical cross-connect subsystem OXC_1; TC_21, TC_23, and TC_24 are the transmitting-side optical adapters of the optical cross-connect subsystem OXC_2, and RC_21, RC_23, and RC_24 are the receiving-side optical adapters of the optical cross-connect subsystem OXC_2; TC_31, TC_32, and TC_34 are the transmitting-side optical adapters of the optical cross-connect subsystem OXC_3, and RC_31, RC_32, and RC_34 are the receiving-side optical adapters of the optical cross-connect subsystem OXC_3; TC_41, TC_42, and TC_43 are the transmitting-side optical adapters of the optical cross-connect subsystem OXC_4, and RC_41, RC_42, and RC_43 are the receiving-side optical adapters of the optical cross-connect subsystem OXC_4; in this distributed all-optical cross-connect cluster system, the connection relationships of the optical cross-connect subsystems OXC_1, OXC_2, OXC_3, and OXC_4 are as follows: the transmitting-side optical adapter TC_12 of the optical cross-connect subsystem OXC_1 is connected to the receiving-side optical adapter RC_21 of the optical cross-connect subsystem OXC_2; the transmitting-side optical adapter TC_13 of the optical cross-connect subsystem OXC_1 is connected to the receiving-side optical adapter RC_31 of the optical cross-connect subsystem OXC_3; the transmitting-side optical adapter TC_14 of the optical cross-connect subsystem OXC_1 is connected to the receiving-side optical adapter RC_41 of the optical cross-connect subsystem OXC_4; the transmitting-side optical adapter TC_21 of the optical cross-connect subsystem OXC_2 is connected to the receiving-side optical adapter RC_12 of the optical cross-connect subsystem OXC_1; the transmitting-side optical adapter TC_23 of the optical cross-connect subsystem OXC_2 is connected to the receiving-side optical adapter RC_32 of the optical cross-connect subsystem OXC_3; the transmitting-side optical adapter TC_24 of the optical cross-connect subsystem OXC_2 is connected to the receiving-side optical adapter RC_42 of the optical cross-connect subsystem OXC_4; the transmitting-side optical adapter TC_31 of the optical cross-connect subsystem OXC_3 is connected to the receiving-side optical adapter RC_13 of the optical cross-connect subsystem OXC_1; the transmitting-side optical adapter TC_32 of the optical cross-connect subsystem OXC_3 is connected to the receiving-side optical adapter RC_23 of the optical cross-connect subsystem OXC_2; the transmitting-side optical adapter TC_34 of the optical cross-connect subsystem OXC_3 is connected to the receiving-side optical adapter RC_43 of the optical cross-connect subsystem OXC_4; the transmitting-side optical adapter TC_41 of the optical cross-connect subsystem OXC_4 is connected to the receiving-side optical adapter RC_14 of the optical cross-connect subsystem OXC_1;The transmitting optical adapter TC_42 of the optical cross-connect subsystem OXC_4 is connected to the receiving optical adapter RC_24 of the optical cross-connect subsystem OXC_2; the transmitting optical adapter TC_43 of the optical cross-connect subsystem OXC_4 is connected to the receiving optical adapter RC_34 of the optical cross-connect subsystem OXC_3.

[0032] In this embodiment, by setting a transmitting optical adapter and a receiving optical adapter in each optical cross-connect subsystem, multiple optical cross-connect subsystems can be directly interconnected through the transmitting optical adapter and the receiving optical adapter thereon. Through simple and flexible configuration, a high-dimensional optical cross-connect subsystem cluster can be realized by using low-dimensional optical cross-connect subsystems in a distributed cluster manner, which enhances the scalability of the optical cross-connect subsystem, and does not require connection through a central cross-frame, can reduce the operation and maintenance cost, improve the system utilization efficiency, and the expansion ability of the system is not limited by the ability of the central frame, solving the technical problem in the related art that the number of ports of the WSS device cannot meet the demand for higher cross-scheduling dimensions in the future network meshing, and the cluster expansion method based on the central cross-frame has high cost, low efficiency and the expansion ability is limited by the central frame. This distributed all-optical cross-connect cluster system not only enhances the scalability of the OXC device, but also reduces the use of the central cross-frame, and the use of a single low-dimensional optical cross-connect subsystem at each position can break through the limitations of the size specifications, power supply and heat dissipation of the computer room equipment and boards.

[0033] Further, in one embodiment, each of the optical cross-connect subsystems has a plurality of transmitting optical waveguides, a plurality of receiving optical waveguides and a plurality of port mapping optical backplanes; in each of the optical cross-connect subsystems, the transmitting optical waveguides are connected to the corresponding transmitting optical adapters in the optical cross-connect subsystem, the receiving optical waveguides are connected to the corresponding receiving optical adapters in the optical cross-connect subsystem through the corresponding port mapping optical backplanes, and the transmitting optical waveguides are connected to the receiving optical waveguides through the port mapping optical backplanes.

[0034] In this embodiment, as Figure 2 shown, an optical cross-connect subsystem (i.e., an OXC_i subsystem) also includes N_i transmitting optical waveguides, N_i receiving optical waveguides and a port mapping optical backplane OB_ij (j = 1... m). Among them, the optical waveguides can be optical switches or multiplexers. For example, in this embodiment, an optical cross-connect subsystem includes N_i 1×N transmitting optical switches, N_i N×1 receiving optical switches (or multiplexers), transmitting optical adapters TC_ij (j = 1... i - 1, i + 1... m), receiving optical adapters RC_ij (j = 1... i - 1, i + 1... m) and a port mapping optical backplane OB_ij (j = 1... m).

[0035] As Figure 3 shown, in the i-th optical cross-connect subsystem OXC_i, the output optical ports of the N_i 1×N optical switches on the transmitting side are divided into fixed m groups, where the number of output optical ports in the j-th group is N_j (j = 1...m), denoted as XT_ij, and are connected to the optical adapter TC_ij on the transmitting side; correspondingly, the input optical ports of the N_i N×1 optical switches on the receiving side are also divided into fixed m groups, where the number of input optical ports in the j-th group is N_j (j = 1...m), taken out and arranged in sequence, denoted as XR_ij, and are connected to the optical adapter RC_ij on the receiving side through the port mapping optical backplane OB_ij (j = 1...m). Among them, the optical adapter TC_ij (j = 1…i-1,i+1…m) on the transmitting side is connected to the j-th group of output optical ports XT_ij (j = 1…i-1,i+1…m) of the 1×N optical switch on the transmitting side; the optical adapter RC_ij (j = 1…,i-1,i+1…m) on the receiving side is connected to the j-th group of input optical ports XR_ij (j = 1……m) of the N×1 optical switch (or multiplexer) on the receiving side through the port mapping optical backplane OB_ij (j = 1…i-1,i+1…m); the i-th group of output optical ports XT_ii of the 1×N optical switch on the transmitting side is connected to the i-th group of input optical ports XR_ii of the N×1 optical switch (or multiplexer) on the receiving side through the port mapping optical backplane OB_ii. In the i-th optical cross-connect subsystem OXC_i, the port mapping optical backplane OB_ij (j = 1……m) realizes the full-shuffle optical interconnection between the i-th group of output optical ports of the N_j 1×N optical switches on the transmitting side and the j-th group of input optical ports of the N_i N×1 optical switches (or multiplexers) on the receiving side.

[0036] Further, in an embodiment, the optical waveguide on the transmitting side has a plurality of output optical ports on the transmitting side, and the optical waveguide on the receiving side has a plurality of input optical ports on the receiving side; if S_x is the x-th optical waveguide on the transmitting side, T_y is the y-th output optical port on the transmitting side of the x-th optical waveguide on the transmitting side; S_y is the y-th optical waveguide on the receiving side, and T_x is the x-th input optical port on the receiving side of the y-th optical waveguide on the receiving side, then the y-th output optical port T_y of the x-th optical waveguide on the transmitting side is connected to the x-th input optical port T_x of the y-th optical waveguide on the receiving side.

[0037] See Figure 3As shown in the figure, in this embodiment, if from top to bottom, S_x is the x-th 1×N optical switch on the transmitting side (x = 1... N_j), T_y is the y-th output optical port on the transmitting side of the 1×N optical switch S_x on the transmitting side (y = 1... N_i); S_y is the y-th N×1 optical switch on the receiving side (y = 1... N_i), and T_x is the x-th input optical port on the receiving side of the N×1 optical switch S_y on the receiving side (x = 1... N_j), then the output optical port T_y on the transmitting side in the 1×N optical switch S_x on the transmitting side is connected to the input optical port T_x on the receiving side in the N×1 optical switch S_y on the receiving side. Connecting according to this rule is the simplest shuffle full-interconnection mode.

[0038] Further, in an embodiment of the distributed all-optical cross-connect cluster system, for the i-th optical cross-connect subsystem OXC_i and the k-th optical cross-connect subsystem OXC_k that are interconnected, the k-th transmitting-side optical adapter TC_ik in the i-th optical cross-connect subsystem is connected to the i-th receiving-side optical adapter RC_ki in the k-th optical cross-connect subsystem; the i-th transmitting-side optical adapter TC_ki in the k-th optical cross-connect subsystem is connected to the k-th receiving-side optical adapter RC_ik in the i-th optical cross-connect subsystem; where i and k are both positive integers and i ≠ k. In this embodiment, an optical cross-connect subsystem includes a plurality of transmitting-side optical adapters, a plurality of receiving-side optical adapters, and a plurality of port mapping optical backplanes. The transmitting-side optical adapter TC_ik of the optical cross-connect subsystem OXC_i is connected to the receiving-side optical adapter RC_ki of the optical cross-connect subsystem OXC_k through the port mapping optical backplane OB_ki; the transmitting-side optical adapter TC_ki of the optical cross-connect subsystem OXC_k is connected to the receiving-side optical adapter RC_ik of the optical cross-connect subsystem OXC_i through the port mapping optical backplane OB_ik (i = 1... m, k = 1... m, i ≠ k).

[0039] Further, in some alternative embodiments, a distributed all-optical cross-connect cluster system with a port specification of m*N×m*N can be composed of m^2 N×N optical cross-connect subsystems OXC_ij (i = 1... m, j = 1... m). Among them, an N×N optical cross-connect subsystem OXC_ij (i = 1... m, j = 1... m) includes N 1×(N + 1) optical switches on the transmitting side, N (N + 1)×1 optical switches (or multiplexers) on the receiving side, transmitting-side optical adapters TC_ij, TCI_ij, and TCO_ij, receiving-side optical adapters RC_ij, RCO_ij, and RCI_ij, and a port mapping optical backplane OB_ij.

[0040] In the N×N optical cross-connect subsystem OXC_ij (i = 1...m, j = 1...m), the input ports of N 1×(N + 1) optical switches on the transmitting side are connected to the optical adapter TCI_ij, the first N output ports of N 1×(N + 1) optical switches on the transmitting side are connected to the optical adapter TC_ij, and the (N + 1)-th output port of N 1×(N + 1) optical switches on the transmitting side is connected to the optical adapter TCO_ij; the output ports of N (N + 1)×1 optical switches on the receiving side are connected to the optical adapter RCO_ij, the first N input ports of N (N + 1)×1 optical switches on the receiving side are connected to the optical adapter RC_ij through the port-mapping optical backplane OB_ij, and the (N + 1)-th input port of N (N + 1)×1 optical switches on the receiving side is connected to the optical adapter RCI_ij. In the N×N optical cross-connect subsystem OXC_ij (i = 1...m, j = 1...m), the port-mapping optical backplane OB_ij realizes the full-shuffle optical interconnection between the first N optical ports of N 1×(N + 1) optical switches and the first N optical ports of N (N + 1)×1 optical switches (or multiplexers). Preferably, if from top to bottom, S_x is the x-th 1×(N + 1) optical switch on the transmitting side (x = 1...N), T_y is the y-th optical port of the 1×(N + 1) optical switch S_x on the transmitting side (y = 1...N), S_y is the y-th (N + 1)×1 optical switch on the receiving side (y = 1...N), and T_x is the x-th optical port of the (N + 1)×1 optical switch S_y on the receiving side (x = 1...N), then the optical port T_y in the 1×(N + 1) optical switch S_x on the transmitting side is connected to the optical port T_x in the (N + 1)×1 optical switch S_y on the receiving side.

[0041] When the N×N optical cross-connect subsystem OXC_ij (i = 1...m, j = 1...m) is used as an independent N×N OXC system, the optical adapter TC_ij is connected to the optical adapter RC_ij, TCI_ij serves as the optical input adapter of the N×N OXC, and RCO_ij serves as the optical output adapter of the N×N OXC.

[0042] ① Combine m N×N optical cross-connect subsystems OXC_ij (i = 1...m, j = 1...m) to form the N×N optical cross-connect subsystem OXC_i (i = 1...m): The optical adapter TCO_ij of OXC_ij is connected to the optical adapter TCI_i(j + 1) of OXC_i(j + 1), and the optical adapter RCI_ij of OXC_ij is connected to the optical adapter RCO_i(j + 1) of OXC_i(j + 1), j = 1...m - 1; The optical adapter TC_i1 of OXC_i1 is connected to the optical adapter RC_i1; TCI_i1 serves as the optical input adapter of OXC_i, and RCO_i1 serves as the optical output adapter of OXC_i;

[0043] ② Combine m N×N optical cross-connect subsystems OXC_i (i = 1... m) to form an m*N×m*N OXC: (For ease of description, swap the labels of OXC_ij (i = 1... m, j = 1... m and i = j) with the label of OXC_i1) Connect the optical adapter TC_ij of OXC_ij to the optical adapter RC_ji of OXC_ji (i = 1... m, j = 1... m and i ≠ j).

[0044] Furthermore, in some alternative embodiments, a distributed all-optical cross-connect cluster system with a port specification of m*N×m*N can also be composed of m^2 + m N×N optical cross-connect subsystems OXC_ij (i = 1... m, j = 1... m, m ≤ N). Among them, one N×N optical cross-connect subsystem OXC_ij (i = 1... m, j = 0... m) includes N 1×N optical switches on the transmitting side, N N×1 optical switches (or multiplexers) on the receiving side, optical adapters TC_ij, TCI_ij, and TCO_ij on the transmitting side, optical adapters RC_ij, RCO_ij, and RCI_ij on the receiving side, and a port mapping optical backplane OB_ij.

[0045] In the N×N optical cross-connect subsystem OXC_ij (i = 1... m, j = 1... m), the input ports of the N 1×N optical switches on the transmitting side are connected to the optical adapter TCI_ij, and the N output ports of the N 1×N optical switches on the transmitting side are connected to the optical adapter TC_ij; the output ports of the N N×1 optical switches on the receiving side are connected to the optical adapter RCO_ij, and the N input ports of the N N×1 optical switches on the receiving side are connected to the optical adapter RC_ij through the port mapping optical backplane OB_ij.

[0046] In the N×N optical cross-connect subsystem OXC_i0 (i = 1... m), the input ports of the N 1×N optical switches on the transmitting side are connected to the optical adapter TCI_ij, and the j-th output port of the N 1×N optical switches on the transmitting side is connected to the optical adapter TCO_ij; the output ports of the N N×1 optical switches on the receiving side are connected to the optical adapter RCO_ij, and the j-th input port of the N N×1 optical switches on the receiving side is connected to the optical adapter RCI_ij, j = 1... m.

[0047] In the N×N optical cross-connect subsystem OXC_ij (i = 1...m, j = 1...m), the port-mapped optical backplane OB_ij realizes full-shuffle optical interconnection between the N output optical ports in N 1×N optical switches and the N input optical ports in N N×1 optical switches (multiplexers). Preferably, if from top to bottom, S_x is the x-th transmitting-side 1×N optical switch (x = 1...N), T_y is the y-th optical port of the transmitting-side 1×N optical switch S_x (y = 1...N); S_y is the y-th receiving-side N×1 optical switch (y = 1...N), T_x is the x-th optical port of the receiving-side N×1 optical switch S_y (x = 1...N), then the optical port T_y in the transmitting-side 1×N optical switch S_x is connected to the optical port T_x in the receiving-side N×1 optical switch S_y.

[0048] When the N×N optical cross-connect subsystem OXC_ij (i = 1...m, j = 1...m) is used as an independent N×N OXC system, the optical adapter TC_ij is connected to the optical adapter RC_ij, TCI_ij serves as the optical input adapter of the N×N OXC, and RCO_ij serves as the optical output adapter of the N×N OXC.

[0049] ① Combine m N×N optical cross-connect subsystems OXC_ij (i = 1...m, j = 1...m) to form an N×N optical cross-connect subsystem OXC_i (i = 1...m): The optical adapter TCO_ij of OXC_i0 is connected to the optical adapter TCI_ij of OXC_ij, and the optical adapter RCI_ij of OXC_i0 is connected to the optical adapter RCO_ij of OXC_ij, j = 1...m; when j = i, the optical adapter TC_ij of OXC_ij is connected to the optical adapter RC_ij; TCI_i0 serves as the optical input adapter of OXC_i, and RCO_i0 serves as the optical output adapter of OXC_i;

[0050] ② Combine m N×N optical cross-connect subsystems OXC_i (i = 1...m) to form an m*N×m*N OXC: Connect the optical adapter TC_ij of OXC_ij to the optical adapter RC_ji of OXC_ji (i = 1...m, j = 1...m and i ≠ j).

[0051] Furthermore, in one embodiment, the transmitting-side optical adapter includes a transmitting-side internal optical adapter and a transmitting-side external optical adapter, and the receiving-side optical adapter includes a receiving-side internal optical adapter and a receiving-side external optical adapter; the transmitting-side internal optical adapter and the receiving-side internal optical adapter inside each optical cross-connect subsystem are interconnected; between multiple optical cross-connect subsystems, they are interconnected through the transmitting-side external optical adapter and the receiving-side external optical adapter.

[0052] See Figure 4As shown in the figure, a specific optical cross-connect subsystem structure diagram is shown. In this embodiment, the distributed all-optical cross-connect cluster system can be composed of multiple N×N optical cross-connect subsystems OXC_k (k = 1, 2,...) stacked and expanded. An N×N optical cross-connect subsystem OXC_k (k = 1, 2,...) includes N 1×(N + 1) optical switches on the transmitting side, N (N + 1)×1 optical switches (or multiplexers) on the receiving side, transmitting-side optical adapters TC_k, TCI_k, and TCO_k, receiving-side optical adapters RC_k, RCO_k, and RCI_k, and a port mapping optical backplane OB_k. Among them, the input ports of the N 1×(N + 1) optical switches on the transmitting side are connected to the transmitting-side optical adapter TCI_k, the first N output ports of the N 1×(N + 1) optical switches on the transmitting side are connected to the transmitting-side optical adapter TC_k, and the (N + 1)-th output port of the N 1×(N + 1) optical switches on the transmitting side is connected to the transmitting-side optical adapter TCO_k; the output ports of the N (N + 1)×1 optical switches on the receiving side are connected to the receiving-side optical adapter RCO_k, the first N input ports of the N (N + 1)×1 optical switches on the receiving side are connected to the receiving-side optical adapter RC_k through the port mapping optical backplane OB, and the (N + 1)-th input port of the N (N + 1)×1 optical switches on the receiving side is connected to the receiving-side optical adapter RCI_k. In this embodiment, TC_k is an internal optical adapter on the transmitting side, TCI_k and TCO_k are external optical adapters on the transmitting side; RC_k is an internal optical adapter on the receiving side, RCO_k and RCI_k are external optical adapters on the receiving side, and the internal optical adapter TC_k on the transmitting side and the internal optical adapter RC_k on the receiving side within each optical cross-connect subsystem are interconnected; multiple optical cross-connect subsystems are interconnected through the external optical adapter TCI_k or TCO_k on the transmitting side and the external optical adapter RCO_k or RCI_k on the receiving side.

[0053] Further, in one embodiment, each of the optical cross-connect subsystems has a transmitting-side optical waveguide, a receiving-side optical waveguide, and a port mapping optical backplane; in each optical cross-connect subsystem, the transmitting-side optical waveguide connects the external optical adapter on the transmitting side and the internal optical adapter on the transmitting side, the internal optical adapter on the receiving side is connected to the receiving-side optical waveguide through the port mapping optical backplane, and the receiving-side optical waveguide connects the external optical adapter on the receiving side.

[0054] See Figure 4As shown, in this embodiment, the optical waveguide on the transmitting side uses a 1×(N + 1) optical switch on the transmitting side, and the optical waveguide on the receiving side uses an (N + 1)×1 optical switch (or multiplexer). A N×N optical cross-connect subsystem OXC_k (k = 1, 2,...) includes N 1×(N + 1) optical switches on the transmitting side, N (N + 1)×1 optical switches (or multiplexers) on the receiving side, and a port mapping optical backplane OB_k. The port mapping optical backplane OB realizes a full shuffle optical interconnection between the first N optical ports of the N 1×(N + 1) optical switches on the transmitting side and the first N optical ports of the N (N + 1)×1 optical switches (multiplexers) on the receiving side. Preferably, if from top to bottom, S_x is the x-th 1×(N + 1) optical switch on the transmitting side (x = 1...N), T_y is the y-th optical port of the 1×(N + 1) optical switch S_x on the transmitting side (y = 1...N), S_y is the y-th (N + 1)×1 optical switch on the receiving side (y = 1...N), and T_x is the x-th optical port of the (N + 1)×1 optical switch S_y on the receiving side (x = 1...N), then the optical port T_y in the 1×(N + 1) optical switch S_x on the transmitting side is connected to the optical port T_x in the (N + 1)×1 optical switch S_y on the receiving side.

[0055] See Figure 4 (a) As shown, when a single optical cross-connect subsystem OXC_k is used as an independent N×N OXC system, the internal optical adapter TC_k on the transmitting side is connected to the internal optical adapter RC_k on the receiving side. The external optical adapter TCI_k on the transmitting side serves as the optical input adapter of the N×N OXC, and the external optical adapter RCO_k on the receiving side serves as the optical output adapter of the N×N OXC.

[0056] As Figure 4 (a) As shown, when OXC_1, OXC_2, OXC_3, and OXC_4 are respectively used as an independent N×N OXC system (denoted as OXC1), the optical adapter TC_1 is connected to the optical adapter RC_1, the optical adapter TC_2 is connected to the optical adapter RC_2, the optical adapter TC_3 is connected to the optical adapter RC_3, and the optical adapter TC_4 is connected to the optical adapter RC_4. TCI_1, TCI_2, TCI_3, and TCI_4 respectively serve as the optical input adapters of OXC_1, OXC_2, OXC_3, and OXC_4, and RCO_1, RCO_2, RCO_3, and RCO_4 respectively serve as the optical output adapters of OXC_1, OXC_2, OXC_3, and OXC_4.

[0057] Further, in one embodiment, the multiple optical cross-connect subsystems include a first optical cross-connect subsystem, a second optical cross-connect subsystem, and a third optical cross-connect subsystem. The external optical adapter on the transmitting side includes an external input optical adapter on the transmitting side and an external output optical adapter on the transmitting side. The external optical adapter on the receiving side includes an external input optical adapter on the receiving side and an external output optical adapter on the receiving side. The external output optical adapter on the transmitting side of the first optical cross-connect subsystem is connected to the external input optical adapter on the transmitting side of the second optical cross-connect subsystem, and the external input optical adapter on the receiving side of the first optical cross-connect subsystem is connected to the external output optical adapter on the receiving side of the second optical cross-connect subsystem. The internal optical adapter on the transmitting side of the second optical cross-connect subsystem is connected to the internal optical adapter on the receiving side of the third optical cross-connect subsystem, and the internal optical adapter on the receiving side of the second optical cross-connect subsystem is connected to the internal optical adapter on the transmitting side of the third optical cross-connect subsystem.

[0058] As Figure 4 (b) shows that in this embodiment, the distributed all-optical cross-connect cluster system includes a first optical cross-connect subsystem OXC_1, a second optical cross-connect subsystem OXC_2, and a third optical cross-connect subsystem OXC_3. For each optical cross-connect subsystem, the external optical adapter on the transmitting side includes an external input optical adapter TCI_k on the transmitting side and an external output optical adapter TCO_k on the transmitting side, and the external optical adapter on the receiving side includes an external input optical adapter RCI_k on the receiving side and an external output optical adapter RCO_k on the receiving side. Based on the N×N OXC system OXC1 of OXC_1, the subsystem OXC_2 and OXC_3 are introduced into this distributed all-optical cross-connect cluster system, and the external output optical adapter TCO_1 on the transmitting side of OXC_1 is connected to the external input optical adapter TCI_2 on the transmitting side of OXC_2, and the external input optical adapter RCI_1 on the receiving side of OXC_1 is connected to the external output optical adapter RCO_2 on the receiving side of OXC_2. The internal optical adapter TC_2 on the transmitting side of OXC_2 is connected to the internal optical adapter RC_3 on the receiving side of OXC_3, and the internal optical adapter TC_3 on the transmitting side of OXC_3 is connected to the internal optical adapter RC_2 on the receiving side of OXC_2. At this time, OXC_2 is used for port expansion of OXC1, and OXC_3 can be used for optical channel add / drop of the OXC1 system.

[0059] Further, in one embodiment, the multiple optical cross-connect subsystems further include a fourth optical cross-connect subsystem. The external output optical adapter on the transmitting side of the fourth optical cross-connect subsystem is connected to the external input optical adapter on the transmitting side of the third optical cross-connect subsystem, and the external input optical adapter on the receiving side of the fourth optical cross-connect subsystem is connected to the external output optical adapter on the receiving side of the third optical cross-connect subsystem.

[0060] As Figure 4 (c) shows that, based on the above embodiment, a fourth optical cross-connect subsystem OXC_4 is introduced, and the external output optical adapter TCO_4 on the transmitting side of OXC_4 is connected to the external input optical adapter TCI_3 on the transmitting side of OXC_3, and the external input optical adapter RCI_4 on the receiving side of OXC_4 is connected to the external output optical adapter RCO_3 on the receiving side of OXC_3; at this time, the 4 N×N optical cross-connect subsystems OXC_1, OXC_2, OXC_3, and OXC_4 form a port-specification 2N×2N OXC system (denoted as OXC2). Among them, TCI_1 and TCI_4 serve as the optical input adapters of the 2N×2N OXC2, and RCO_1 and RCO_4 serve as the optical output adapters of the 2N×2N OXC2.

[0061] By analogy, based on the above, 2 N×N optical cross-connect subsystems OXC_5 and OXC_6 can also be introduced, and the optical adapter TCO_2 of OXC_2 is connected to the optical adapter TCI_5 of OXC_5, and the optical adapter RCI_2 of OXC_2 is connected to the optical adapter RCO_5 of OXC_5; the optical adapter TC_5 of OXC_5 is connected to the optical adapter RC_6 of OXC_6, and the optical adapter TC_6 of OXC_6 is connected to the optical adapter RC_5 of OXC_5; at this time, OXC_5 is used for the port expansion of OXC2, and OXC_6 can be used for the optical channel add-drop of the OXC2 system.

[0062] Based on the above, 2 N×N optical cross-connect subsystems OXC_7 and OXC_8 can also be introduced, and the optical adapter TCO_3 of OXC_3 is connected to the optical adapter TCI_7 of OXC_7, and the optical adapter RCI_3 of OXC_3 is connected to the optical adapter RCO_7 of OXC_7; the optical adapter TC_7 of OXC_7 is connected to the optical adapter RC_8 of OXC_8, and the optical adapter TC_8 of OXC_8 is connected to the optical adapter RC_7 of OXC_7; at this time, OXC_7 is used for the port expansion of OXC2, and OXC_8 can be used for the optical channel add-drop of the OXC2 system.

[0063] On the basis described above, one N×N optical cross-connect subsystem OXC_9 can be further introduced. The optical adapter TCO_9 of OXC_9 is connected to the optical adapter TCI_8 of OXC_8, and the optical adapter RCI_9 of OXC_9 is connected to the optical adapter RCO_8 of OXC_8. The optical adapter TCO_8 of OXC_8 is connected to the optical adapter TCI_6 of OXC_6, and the optical adapter RCI_8 of OXC_8 is connected to the optical adapter RCO_6 of OXC_6. At this time, nine N×N optical cross-connect subsystems OXC_1, OXC_2, OXC_3, OXC_4, OXC_5, OXC_6, OXC_7, OXC_8, and OXC_9 form an OXC system with a port specification of 3N×3N (denoted as OXC3). Among them, TCI_1, TCI_4, and TCI_9 serve as the optical input adapters of the 3N×3N OXC3, and RCO_1, RCO_4, and RCO_9 serve as the optical output adapters of the 3N×3N OXC3.

[0064] According to the above method, a large-scale distributed all-optical cross-connect cluster system can be formed by stacking and expanding multiple N×N optical cross-connect subsystems OXC_k (k = 1, 2,...).

[0065] Furthermore, in one embodiment, the distributed all-optical cross-connect cluster system may further include an optical cross-connect expansion subsystem, which connects two of the optical cross-connect subsystems. See Figure 5 As shown, in this embodiment, the optical cross-connect expansion subsystem is denoted as OXE. A distributed all-optical cross-connect cluster system with a specification of (m + 1)*N×(m + 1)*N can be composed of (m + 1) N×N optical cross-connect subsystems OXC and m*(m + 1) / 2 N×N optical cross-connect expansion subsystems OXE. By using an optical cross-connect expansion subsystem similar in structure to the optical cross-connect subsystem to connect two optical cross-connect subsystems in this embodiment, higher-dimensional OXC cluster expansion can be further achieved.

[0066] Furthermore, in one embodiment, the optical cross-connect expansion subsystem is provided with a plurality of transmitting-side expansion optical adapters and a plurality of receiving-side expansion optical adapters. The optical cross-connect expansion subsystem is connected to one of the optical cross-connect subsystems through some of the transmitting-side expansion optical adapters and some of the receiving-side expansion optical adapters; and the optical cross-connect expansion subsystem is connected to another optical cross-connect subsystem through another part of the transmitting-side expansion optical adapters and another part of the receiving-side expansion optical adapters.

[0067] See Figure 5As shown in the figure, in this embodiment, an N×N optical cross-connect subsystem OXC_i (k = 1, 2, …… m, m + 1) includes N transmit-side 1×(N + m) optical switches, N receive-side (N + m)×1 optical switches (or multiplexers), transmit-side optical adapters TC_i, TCI_i, and TCO_in (n = 1, 2, …… i - 1, i + 1 …… m, m + 1), receive-side optical adapters RC_i, RCO_i, and RCI_in (n = 1, 2, …… i - 1, i + 1 …… m, m + 1), and a port mapping optical backplane OB_i. Among them, the input ports of the N transmit-side 1×(N + m) optical switches are connected to the optical adapter TCI_i, the first N output ports of the N transmit-side 1×(N + m) optical switches are connected to the optical adapter TC_i, and the (N + n)-th output ports of the N transmit-side 1×(N + m) optical switches are connected to the optical adapter TCO_in (n = 1, 2, …… i - 1, i + 1 …… m, m + 1); the output ports of the N receive-side (N + m)×1 optical switches are connected to the optical adapter RCO_i, the first N input ports of the N receive-side (N + m)×1 optical switches are connected to the optical adapter RC_i through the port mapping optical backplane OB_i, and the (N + n)-th input ports of the N receive-side (N + m)×1 optical switches are connected to the optical adapter RCI_in (n = 1, 2, …… i - 1, i + 1 …… m, m + 1). The port mapping optical backplane OB_i realizes the full-shuffle optical interconnection between the first N optical ports of the N 1×(N + m) optical switches and the first N optical ports of the N (N + m)×1 optical switches (multiplexers). Preferably, if from top to bottom, S_x is the x-th transmit-side 1×(N + m) optical switch (x = 1 …… N), T_y is the y-th optical port of the transmit-side 1×(N + m) optical switch S_x (y = 1 …… N); S_y is the y-th receive-side (N + m)×1 optical switch (y = 1 …… N), T_x is the x-th optical port of the receive-side (N + m)×1 optical switch S_y (x = 1 …… N), then the optical port T_y in the transmit-side 1×(N + m) optical switch S_x is connected to the optical port T_x in the receive-side (N + m)×1 optical switch S_y. The optical adapter TC_i is connected to the optical adapter RC_i, TCI_i serves as the optical input connector of the N×N optical cross-connect subsystem OXC_i, and RCO_i serves as the optical output connector of the N×N optical cross-connect subsystem OXC_i.

[0068] Figure 5Among them, an N×N optical cross-connect subsystem OXC_j (k = 1, 2, …… m, m + 1) includes N transmitting-side 1×(N + m) optical switches, N receiving-side (N + m)×1 optical switches (or multiplexers), transmitting-side optical adapters TC_j, TCI_j, and TCO_jn (n = 1, 2, …… j - 1, j + 1, …… m, m + 1), receiving-side optical adapters RC_j, RCO_j, and RCI_jn (n = 1, 2, …… j - 1, j + 1, …… m, m + 1), and a port-mapping optical backplane OB_j. Among them, the input ports of the N transmitting-side 1×(N + m) optical switches are connected to the optical adapter TCI_j, the first N output ports of the N transmitting-side 1×(N + m) optical switches are connected to the optical adapter TC_j, and the (N + n)-th output ports of the N transmitting-side 1×(N + m) optical switches are connected to the optical adapter TCO_jn (n = 1, 2, …… j - 1, j + 1, …… m, m + 1); the output ports of the N receiving-side (N + m)×1 optical switches are connected to the optical adapter RCO_j, the first N input ports of the N receiving-side (N + m)×1 optical switches are connected to the optical adapter RC_j through the port-mapping optical backplane OB_j, and the (N + n)-th input ports of the N receiving-side (N + m)×1 optical switches are connected to the optical adapter RCI_jn (n = 1, 2, …… j - 1, j + 1, …… m, m + 1). The port-mapping optical backplane OB_j realizes the full-shuffle optical interconnection between the first N optical ports of the N transmitting-side 1×(N + m) optical switches and the first N optical ports of the N receiving-side (N + m)×1 optical switches (multiplexers). Preferably, if from top to bottom, S_x is the x-th transmitting-side 1×(N + m) optical switch (x = 1, …… N), T_y is the y-th optical port of the transmitting-side 1×(N + m) optical switch S_x (y = 1, …… N); S_y is the y-th receiving-side (N + m)×1 optical switch (y = 1, …… N), T_x is the x-th optical port of the receiving-side (N + m)×1 optical switch S_y (x = 1, …… N), then the optical port T_y in the transmitting-side 1×(N + m) optical switch S_x is connected to the optical port T_x in the receiving-side (N + m)×1 optical switch S_y. The optical adapter TC_j is connected to the optical adapter RC_j, TCI_j serves as the optical input connector of the N×N optical cross-connect subsystem OXC_j, and RCO_j serves as the optical output connector of the N×N optical cross-connect subsystem OXC_j.

[0069] Figure 5Among them, the optical cross-connect expansion subsystem OXE_ij (i = 1, 2, …… m, m + 1, j = 1, 2, …… m, m + 1, and i ≠ j) used to connect the N×N optical cross-connect subsystem OXC_i and OXC_j includes 2*N 1×N optical switches on the transmitting side, 2*N N×1 optical switches (or multiplexers) on the receiving side, the transmitting-side extended optical adapter TE_i, TE_j and TEI_i, TEI_j, the receiving-side extended optical adapter RE_i, RE_j and REO_i, REO_j, and the port mapping optical backplane OE_i, OE_j. Among them, the input ports of the first group of N 1×N optical switches on the transmitting side are connected to the transmitting-side extended optical adapter TEI_i, and the input ports of the second group of N 1×N optical switches on the transmitting side are connected to the transmitting-side extended optical adapter TEI_j; the N output ports of the first group of N 1×N optical switches on the transmitting side are connected to the transmitting-side extended optical adapter TE_i, and the N output ports of the second group of N 1×N optical switches on the transmitting side are connected to the transmitting-side extended optical adapter TE_j. The output ports of the first group of N N×1 optical switches on the receiving side are connected to the receiving-side extended optical adapter REO_i, and the output ports of the second group of N N×1 optical switches on the receiving side are connected to the receiving-side extended optical adapter REO_j; the N input ports of the first group of N N×1 optical switches on the receiving side are connected to the receiving-side extended optical adapter RE_i through the port mapping optical backplane OE_i, and the N input ports of the second group of N N×1 optical switches on the receiving side are connected to the receiving-side extended optical adapter RE_j through the port mapping optical backplane OE_j. The port mapping optical backplanes OE_i and OE_j realize full-shuffle optical interconnection between the N output optical ports in the N 1×N optical switches on the transmitting side and the N input optical ports in the N N×1 optical switches (multiplexers) on the receiving side. Preferably, if from top to bottom, S_x is the x-th 1×N optical switch on the transmitting side (x = 1……N), T_y is the y-th optical port of the 1×N optical switch S_x on the transmitting side (y = 1……N), S_y is the y-th N×1 optical switch on the receiving side (y = 1……N), and T_x is the x-th optical port of the N×1 optical switch S_y on the receiving side (x = 1……N), then the optical port T_y in the 1×N optical switch S_x on the transmitting side is connected to the optical port T_x in the N×1 optical switch S_y on the receiving side.

[0070] Specifically, Figure 5In it, the connection relationship between the optical cross-connect expansion subsystem OXE_ij (i = 1, 2, …… m, m + 1, j = 1, 2, …… m, m + 1, and i ≠ j) and the N×N optical cross-connect subsystems OXC_i and OXC_j is as follows: The optical transfer adapter TEI_j of OXE_ij is connected to the optical transfer adapter TCO_ij of OXC_i, and the optical transfer adapter TEI_i of OXE_ij is connected to the optical transfer adapter TCO_ji of OXC_j; The optical receive adapter REO_j of OXE_ij is connected to the optical receive adapter RCI_ij of OXC_i, and the optical receive adapter REO_i of OXE_ij is connected to the optical receive adapter RCI_ji of OXC_j; The optical transmit adapter TE_i of OXE_ij is connected to the optical receive adapter RE_j of OXE_ij, and the optical transmit adapter TE_j of OXE_ij is connected to the optical receive adapter RE_i of OXE_ij.

[0071] In the above-mentioned distributed all-optical cross-connect cluster system, the dimensions of the optical switch for cross-scheduling optical signals include but are not limited to the spatial dimension, the time dimension, the frequency (wavelength) dimension, or a combination of the above dimensions. Optical equalization compensation devices such as optical amplifiers can also be used to equalize and compensate for the damage and distortion of optical signals.

[0072] In the description of this application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to this application. Unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0073] It should be noted that in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0074] The above are only specific embodiments of the present application, enabling those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A distributed all-optical cross-connect cluster system, characterized in that: It includes: A plurality of optical cross-connection subsystems, each of which has a transmitting side optical adapter and a receiving side optical adapter, the plurality of optical cross-connection subsystems are interconnected via the transmitting side optical adapter and the receiving side optical adapter, and the transmitting side optical adapter of one of the optical cross-connection subsystems is connected to the receiving side optical adapter of another optical cross-connection subsystem.

2. The distributed all-optical cross-connect cluster system according to claim 1, characterized in that: Each of the optical cross-connect subsystems has a plurality of transmitting-side optical waveguides, a plurality of receiving-side optical waveguides and a plurality of port mapping optical backplanes; In each of the optical cross-connection subsystems, the transmitting side optical waveguide is connected to the corresponding transmitting side optical adapter in the optical cross-connection subsystem, the receiving side optical waveguide is connected to the corresponding receiving side optical adapter in the optical cross-connection subsystem through the corresponding port mapping optical backplane, and the transmitting side optical waveguide is connected to the receiving side optical waveguide through the port mapping optical backplane.

3. The distributed all-optical cross-connect cluster system according to claim 2, characterized in that: The transmitting side optical waveguide has a plurality of transmitting side output optical ports, and the receiving side optical waveguide has a plurality of receiving side input optical ports; If S_x is the x-th transmitting side optical waveguide, T_y is the y-th transmitting side output optical port of the x-th transmitting side optical waveguide; S_y is the y-th receiving side optical waveguide, and T_x is the x-th receiving side input optical port of the y-th receiving side optical waveguide, then the y-th transmitting side output optical port T_y of the x-th transmitting side optical waveguide is connected to the x-th receiving side input optical port T_x of the y-th receiving side optical waveguide.

4. The distributed all-optical cross-connect cluster system according to claim 1, characterized in that: The kth transmitting side optical adapter TC_ik in the i-th optical cross-connection subsystem is connected to the i-th receiving side optical adapter RC_ki in the k-th optical cross-connection subsystem; the i-th transmitting side optical adapter TC_ki in the k-th optical cross-connection subsystem is connected to the k-th receiving side optical adapter RC_ik in the i-th optical cross-connection subsystem; Wherein, i and k are both positive integers, and i≠k.

5. The distributed all-optical cross-connect cluster system according to claim 1, characterized in that: The transmitting side optical adapter includes an transmitting side internal optical adapter and an transmitting side external optical adapter, and the receiving side optical adapter includes a receiving side internal optical adapter and a receiving side external optical adapter; The transmitting-side internal optical adapter and the receiving-side internal optical adapter in each of the optical cross-connect subsystems are interconnected; The plurality of optical cross-connect subsystems are interconnected through the transmitting-side external optical adapter and the receiving-side external optical adapter.

6. The distributed all-optical cross-connect cluster system according to claim 5, characterized in that: Each of the optical cross-connection subsystems has a transmitting side optical waveguide, a receiving side optical waveguide and a port mapping optical backplane; In each of the optical cross-connection subsystems, the transmitting side optical waveguide connects the transmitting side external optical adapter and the transmitting side internal optical adapter, the receiving side internal optical adapter is connected to the receiving side optical waveguide through the port mapping optical backplane, and the receiving side optical waveguide is connected to the receiving side external optical adapter.

7. The distributed all-optical cross-connect cluster system according to claim 5, characterized in that: The multiple optical cross-connection subsystems include a first optical cross-connection subsystem, a second optical cross-connection subsystem and a third optical cross-connection subsystem, the transmitting side external optical adapter includes a transmitting side external input optical adapter and a transmitting side external output optical adapter, and the receiving side external optical adapter includes a receiving side external input optical adapter and a receiving side external output optical adapter; The external output optical adapter on the transmitting side of the first optical cross-connection subsystem is connected to the external input optical adapter on the transmitting side of the second optical cross-connection subsystem, and the external input optical adapter on the receiving side of the first optical cross-connection subsystem is connected to the external output optical adapter on the receiving side of the second optical cross-connection subsystem; The internal optical adapter on the transmitting side of the second optical cross-connection subsystem is connected to the internal optical adapter on the receiving side of the third optical cross-connection subsystem, and the internal optical adapter on the receiving side of the second optical cross-connection subsystem is connected to the internal optical adapter on the transmitting side of the third optical cross-connection subsystem.

8. The distributed all-optical cross-connect cluster system according to claim 7, characterized in that: The multiple optical cross-connection subsystems also include a fourth optical cross-connection subsystem, wherein the transmission side external output optical adapter of the fourth optical cross-connection subsystem is connected to the transmission side external input optical adapter of the third optical cross-connection subsystem, and the reception side external input optical adapter of the fourth optical cross-connection subsystem is connected to the reception side external output optical adapter of the third optical cross-connection subsystem.

9. The distributed all-optical cross-connect cluster system according to claim 1, characterized in that: The distributed all-optical cross-connection cluster system further comprises an optical cross-connection extension subsystem, and the optical cross-connection extension subsystem connects two optical cross-connection subsystems.

10. The distributed all-optical cross-connect cluster system according to claim 9, characterized in that: The optical cross-connection extension subsystem is provided with a plurality of transmission side extension optical adapters and a plurality of reception side extension optical adapters. The optical cross-connection extension subsystem is connected to one of the optical cross-connection subsystems through a portion of the transmission side extension optical adapters and a portion of the reception side extension optical adapters; and the optical cross-connection extension subsystem is connected to another optical cross-connection subsystem through another portion of the transmission side extension optical adapters and another portion of the reception side extension optical adapters.

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