Intelligently defined optical tunnel network system

Abstract

An intelligent defined optical tunnel network system includes a plurality of groups. Each group includes an optical plug-in subsystem. Each optical plug-in subsystem includes a first transmission module and a second transmission module. The first transmission modules in the optical plug-in subsystem are interconnected to form a first transmission ring. The second transmission modules in the optical plug-in subsystem are interconnected to form a second transmission ring. The first transmission module includes a multiplexer and a first optical signal amplifier. The multiplexer is connected to a top-mounted switch. The multiplexer is used to receive an uploaded optical signal from the top-mounted switch through an input end and integrate the uploaded optical signal into a synthesized optical signal. The uploaded optical signals have respective wavelengths. The first optical signal amplifier is coupled to the multiplexer to amplify the synthesized optical signal and output the amplified synthesized optical signal.

Description

Technical Field

[0001] The present disclosure relates to an optical tunnel network system, and more particularly to an optical tunnel network system comprising a plurality of groups. Background Art

[0002] Data Center Networks (DCNs) are designed to provide reliable and efficient network architecture in cloud / edge data centers to support a variety of cloud / edge or enterprise applications and services, such as cloud computing, edge computing, data storage, data mining or social networking.

[0003] In the existing DCNs architecture that uses electrical switches for data exchange, the transmission rate is still limited by the switching capacity of the electrical switches. In addition, a large amount of photoelectric and electro-optical conversions during data transmission cause huge power consumption. The electrical switches themselves also need to perform a large amount of calculations to determine packet routing, which not only consumes power, increases transmission delays, and increases heat dissipation costs. In addition, when the system architecture of the electrical switch is fixed, it is difficult to upgrade to support more cabinets or higher-performance servers. When increasing the system transmission rate, the original electrical switches need to be replaced, resulting in increased deployment costs. Summary of the invention

[0004] The present disclosure discloses an intelligently defined optical tunnel network system, comprising a plurality of groups, each of which comprises a plurality of optical plug-in subsystems, wherein each of the optical plug-in subsystems comprises a first transmission module and a second transmission module, the first transmission modules of the optical plug-in subsystems are interconnected to form a first transmission ring, and the second transmission modules of the optical plug-in subsystems are interconnected to form a second transmission ring. Each of the first transmission modules comprises a multiplexer and a first optical signal amplifier. The multiplexer is connected to a top-mounted switch, and the multiplexer is used to receive a plurality of uploaded optical signals from the top-mounted switch through a plurality of input ports, and integrate the uploaded optical signals into a synthetic optical signal, wherein the uploaded optical signal has a plurality of wavelengths. The first optical signal amplifier is coupled to the multiplexer, and the first optical signal amplifier is used to amplify the synthetic optical signal and output the amplified synthetic optical signal.

[0005] The present disclosure further discloses an intelligently defined optical tunnel network system, comprising a plurality of groups, each of which comprises a plurality of optical plug-in subsystems, wherein each of the optical plug-in subsystems comprises a first transmission module and a second transmission module, the first transmission modules of the optical plug-in subsystems are interconnected to form a first transmission ring, and the second transmission modules of the optical plug-in subsystems are interconnected to form a second transmission ring. Each of the first transmission modules comprises a multiplexer, a first optical splitter, and a first optical signal amplifier. The multiplexer is connected to a top-mounted switch, and the multiplexer is used to receive a plurality of uploaded optical signals from the top-mounted switch through a plurality of input ports, and integrate the uploaded optical signals into a synthesized optical signal, wherein the first output port of the multiplexer is used to transmit the synthesized optical signal to the first optical switching connection subsystem through the first longitudinal port, and the second output port of the multiplexer is used to output the synthesized optical signal. The first optical splitter is located on the first transmission ring and coupled to the second output port of the multiplexer, and the first optical splitter is used to receive the synthesized optical signal from the second output port of the multiplexer and transmit the first lateral transmission optical signal through the first transmission ring. The first optical signal amplifier is located on the first transmission ring and coupled to the first optical splitter. The first optical signal amplifier is used for amplifying the first side transmission optical signal and outputting the amplified first side transmission optical signal to the first transmission module of another optical plug-in subsystem in the same group. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The present disclosure is best understood through the following detailed description and accompanying drawings. It should be noted that, according to common industry practice, various components are not drawn to scale. In fact, the size of various components can be arbitrarily increased or reduced for the purpose of clear description.

[0007] Figure 1 It is a schematic diagram of an intelligently defined optical tunnel network system according to some embodiments of the present disclosure.

[0008] Figure 2 Schematic diagram of an optical extraction subsystem according to some embodiments of the present disclosure.

[0009] Figure 3 Schematic diagram of an optical extraction subsystem according to some embodiments of the present disclosure.

[0010] Figure 4 Schematic diagram of an optical extraction subsystem according to some embodiments of the present disclosure.

[0011] Figure 5 1 is a connection diagram of a first transmission module and a second transmission module of an optical plug-in subsystem in the same group according to some embodiments of the present disclosure.

[0012] Fig. 6A is a schematic diagram of a multiplexer according to some embodiments of the present disclosure.

[0013] Figure 6Bis a schematic diagram of a multiplexer according to some embodiments of the present disclosure.

[0014] Figure 6C is a schematic diagram of a multiplexer according to some embodiments of the present disclosure.

[0015] Description of reference numerals: 100: intelligently defined optical tunnel network system 200: optical plug-in subsystem

[0016] 200a~200e:Optical plug-in subsystem

[0017] 210: First transmission module

[0018] 211: First longitudinal end

[0019] 212: Multiplexer

[0020] 214: Switching submodule

[0021] 216: Demultiplexer

[0022] 220: Second transmission module

[0023] 221: First longitudinal end

[0024] 222: Multiplexer

[0025] 224: Switching submodule

[0026] 226: Demultiplexer

[0027] 300: Optical plug-in subsystem

[0028] 310: First transmission module

[0029] 311: First longitudinal end

[0030] 312: Multiplexer

[0031] 314: Switching submodule

[0032] 316: Demultiplexer

[0033] 320: Second transmission module

[0034] 321: First longitudinal end

[0035] 322: Multiplexer

[0036] 324: Switching submodule

[0037] 326: Demultiplexer

[0038] 400: Optical plug-in subsystem

[0039] 410: First transmission module

[0040] 411: First output terminal

[0041] 412: Multiplexer

[0042] 413: Second output terminal

[0043] 414: Switching submodule

[0044] 415: first longitudinal end

[0045] 416: Demultiplexer

[0046] 420: Second transmission module

[0047] 421: First output terminal

[0048] 422: Multiplexer

[0049] 423: Second output terminal

[0050] 424: Switching submodule

[0051] 425: first longitudinal end

[0052] 426: Demultiplexer

[0053] 400a~400e: Optical switching connection subsystem

[0054] 500: Software Defined Network Controller

[0055] 900a, 900b: Rack

[0056] AP211~AP218: Input terminal

[0057] AP221~AP228: Input terminal

[0058] AP411~AP418: Input terminal

[0059] BMSP1: Beam Splitter

[0060] BMSP2: Beam Splitter

[0061] BMSP3: Beam Splitter

[0062] DL1~DL8: Downlink optical signal

[0063] DL9~DL16: Downward optical signal

[0064] Ds11: first downlink transmission optical signal

[0065] Ds12: Second downlink transmission optical signal

[0066] Ds13: The third downlink transmission optical signal

[0067] Ds14: the fourth downlink transmission optical signal

[0068] Ds15: fifth downlink transmission optical signal

[0069] Ds15': amplifies the fifth downlink transmission optical signal

[0070] Ds16: sixth downlink transmission optical signal

[0071] Ds16': amplifies the sixth downlink transmission optical signal

[0072] Ds21: first downlink transmission optical signal

[0073] Ds22: Second downlink transmission optical signal

[0074] Ds23: The third downlink transmission optical signal

[0075] Ds24: the fourth downlink transmission optical signal

[0076] Ds25: fifth downlink transmission optical signal

[0077] Ds25': amplifies the fifth downlink transmission optical signal

[0078] Ds26: sixth downlink transmission optical signal

[0079] Ds26': amplifies the sixth downlink transmission optical signal

[0080] Ds31: first downlink transmission optical signal

[0081] Ds32: Second downlink transmission optical signal

[0082] Ds32': amplifies the second downstream transmission optical signal

[0083] Ds33: The third downlink transmission optical signal

[0084] Ds34: the fourth downlink transmission optical signal

[0085] Ds34': amplifies the fourth downlink transmission optical signal

[0086] Ds35: fifth downlink transmission optical signal

[0087] Ds36: sixth downlink transmission optical signal

[0088] Ds41: first downlink transmission optical signal

[0089] Ds42: Second downlink transmission optical signal

[0090] Ds42': amplifies the second downstream transmission optical signal

[0091] Ds43: The third downlink transmission optical signal

[0092] Ds44: the fourth downlink transmission optical signal

[0093] Ds44': amplifies the fourth downstream transmission optical signal

[0094] Ds45: fifth downlink transmission optical signal

[0095] Ds46: sixth downlink transmission optical signal

[0096] Ds51: first downlink transmission optical signal

[0097] Ds52: Second downlink transmission optical signal

[0098] Ds53: The third downlink transmission optical signal

[0099] Ds54: the fourth downlink transmission optical signal

[0100] Ds54': amplifies the fourth downlink transmission optical signal

[0101] Ds55: fifth downlink transmission optical signal

[0102] Ds56: sixth downlink transmission optical signal

[0103] Ds61: first downlink transmission optical signal

[0104] Ds62: Second downlink transmission optical signal

[0105] Ds63: The third downlink transmission optical signal

[0106] Ds64: the fourth downlink transmission optical signal

[0107] Ds64': amplifies the fourth downstream transmission optical signal

[0108] Ds65: fifth downlink transmission optical signal

[0109] Ds66: sixth downlink transmission optical signal

[0110] ED211: The first optical signal amplifier

[0111] ED212: Second optical signal amplifier

[0112] ED213: The third optical signal amplifier

[0113] ED221: The first optical signal amplifier

[0114] ED222: Second optical signal amplifier

[0115] ED223: The third optical signal amplifier

[0116] ED311: The first optical signal amplifier

[0117] ED312: Second optical signal amplifier

[0118] ED313: The third optical signal amplifier

[0119] ED321: The first optical signal amplifier

[0120] ED322: Second optical signal amplifier

[0121] ED323: The third optical signal amplifier

[0122] ED411: The first optical signal amplifier

[0123] ED412: Second optical signal amplifier

[0124] ED421: The first optical signal amplifier

[0125] ED422: Second optical signal amplifier

[0126] Group1: wavelength group

[0127] Group2: wavelength group

[0128] Ls11: first side transmission optical signal

[0129] Ls12: Second side transmission optical signal

[0130] Ls12': amplifies the second side transmission optical signal

[0131] Ls13: The third side transmission optical signal

[0132] Ls14: fourth side transmission optical signal

[0133] Ls21: first side transmission optical signal

[0134] Ls22: Second side transmission optical signal

[0135] Ls22': amplifies the second side transmission optical signal

[0136] Ls23: The third side transmission optical signal

[0137] Ls24: fourth side transmission optical signal

[0138] Ls31: first side transmission optical signal

[0139] Ls32: Second side transmission optical signal

[0140] Ls32': amplifies the second side transmission optical signal

[0141] Ls33: The third side transmission optical signal

[0142] Ls34: fourth side transmission optical signal

[0143] Ls41: First side transmission optical signal

[0144] Ls42: Second side transmission optical signal

[0145] Ls42': amplifies the second side transmission optical signal

[0146] Ls43: The third side transmission optical signal

[0147] Ls44: Fourth side transmission optical signal

[0148] Ls51: First side transmission optical signal

[0149] Ls51': amplifies the first side-transmitted optical signal

[0150] Ls52: Second side transmission optical signal

[0151] Ls53: The third side transmission optical signal

[0152] Ls54: Fourth side transmission optical signal

[0153] Ls61: first side transmission optical signal

[0154] Ls61': amplifies the first side-transmitted optical signal

[0155] Ls62: Second side transmission optical signal

[0156] Ls63: The third side transmission optical signal

[0157] Ls64: Fourth side transmission optical signal

[0158] P1~P4:Group

[0159] R2: Ring Grid Structure

[0160] RING1: The first transmission ring

[0161] RING2: Second transmission ring

[0162] Sig11: Synthetic Optical Signals

[0163] Sig11': Amplifying synthetic optical signals

[0164] Sig21: Synthetic Optical Signals

[0165] Sig21': Amplifying synthetic optical signals

[0166] Sig31: Synthetic Optical Signals

[0167] Sig31': Amplifying synthetic optical signals

[0168] Sig41: Synthesizing Optical Signals

[0169] Sig41': Amplifying synthetic optical signals

[0170] Sig51: Synthesizing optical signals

[0171] Sig61: Synthetic light signal

[0172] SP211: The first optical splitter

[0173] SP212: Second beam splitter

[0174] SP213: Third beam splitter

[0175] SP221: The first optical splitter

[0176] SP222: Second beam splitter

[0177] SP223: The third beam splitter

[0178] SP311: The first optical splitter

[0179] SP312: Second beam splitter

[0180] SP313: The third beam splitter

[0181] SP321: The first optical splitter

[0182] SP322: Second beam splitter

[0183] SP323: The third beam splitter

[0184] SP411: The first optical splitter

[0185] SP412: Second beam splitter

[0186] SP413: Third beam splitter

[0187] SP421: First Splitter

[0188] SP422: Second beam splitter

[0189] SP423: Third beam splitter

[0190] T1, T2: Network

[0191] ToR: Top of Rack Switch

[0192] ToRa, ToRb: Top-mounted switches

[0193] UL1~UL8: Upload optical signal

[0194] UL9~UL16: Upload optical signal

[0195] Us11: first uplink transmission optical signal

[0196] Us12: Second uplink transmission optical signal

[0197] Us13: The third uplink transmission optical signal

[0198] Us21: first uplink transmission optical signal

[0199] Us22: Second uplink transmission optical signal

[0200] Us23: The third uplink transmission optical signal

[0201] Us31: First uplink transmission optical signal

[0202] Us32: Second uplink transmission optical signal

[0203] Us33: The third uplink transmission optical signal

[0204] Us41: first uplink transmission optical signal

[0205] Us42: Second uplink transmission optical signal

[0206] Us43: The third uplink transmission optical signal

[0207] WS211: The first wavelength selective switch

[0208] WS212: Second wavelength selective switch

[0209] WS213: Third Wavelength Selective Switch

[0210] WS214: The fourth wavelength selective switch

[0211] WS221: The first wavelength selective switch

[0212] WS222: Second wavelength selective switch

[0213] WS223: Third Wavelength Selective Switch

[0214] WS224: The fourth wavelength selective switch

[0215] WS311: The first wavelength selective switch

[0216] WS312: Second wavelength selective switch

[0217] WS313: Third Wavelength Selective Switch

[0218] WS314: The fourth wavelength selective switch

[0219] WS321: The first wavelength selective switch

[0220] WS322: Second wavelength selective switch

[0221] WS323: Third Wavelength Selective Switch

[0222] WS324: Fourth wavelength selective switch WS411: First wavelength selective switch

[0223] WS412: Second wavelength selective switch

[0224] WS413: Third Wavelength Selective Switch

[0225] WS421: The first wavelength selective switch

[0226] WS422: Second wavelength selective switch

[0227] WS423: Third Wavelength Selective Switch

[0228] λ1, λ2, λ6, λ7, λ11, λ12, λ16, λ17, λ21, λ22, λ26, λ27, λ31, λ32, λ36, λ47: wavelength DETAILED DESCRIPTION

[0229] The following is a detailed description of the embodiments with accompanying drawings to better understand the implementation methods of the present disclosure, but the provided embodiments are not intended to limit the scope of the present disclosure, and the description of the structural operation is not intended to limit the order of its execution. Any device with an equal technical effect produced by the recombined structure of the components is within the scope of the present disclosure. In addition, according to the standards and common practices of the industry, the drawings are only for the purpose of auxiliary explanation and are not drawn according to the original size. In fact, the sizes of various features can be arbitrarily increased or reduced for the convenience of explanation. The same elements in the following description will be described with the same symbols for easy understanding.

[0230] The terms used throughout the specification and claims generally have the ordinary meaning of each term used in the art, in the context of this disclosure, and in the specific context, unless otherwise noted. Certain terms used to describe the present disclosure will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art on the description of the present disclosure.

[0231] In addition, the words "include", "including", "have", "contain", etc. used in this article are all open terms, that is, they mean "including but not limited to". In addition, "and / or" used in this article includes any one or more items in the relevant enumerated items and all combinations thereof.

[0232] In this document, when an element is referred to as "connected" or "coupled", it may refer to "electrically connected", "connected with optical fiber" or "coupled". "Connected" or "coupled" can also be used to indicate that two or more elements cooperate with each other or interact with each other. In addition, although the terms "first", "second", etc. are used in this document to describe different elements, the terms are only used to distinguish elements or operations described by the same technical terms. Unless the context clearly indicates, the terms do not specifically refer to or imply an order or sequence, nor are they used to limit the present invention. In the present disclosure, the text descriptions such as 1x1, 1x2, 1x3, 2x1, 2x2, 5x1, 6x4 and NxM are mentioned to describe the number of input terminals and the number of output terminals of 1 in 1 out, 1 in 2 out, 1 in 3 out, 2 in 1 out, 2 in 2 out, 5 in 1 out, 6 in 4 out and N in M ​​out, respectively.

[0233] See also Figure 1 . Figure 1 Schematic diagram of an intelligent optical tunnel network system 100 according to some embodiments of the present disclosure. In some embodiments, the intelligent optical tunnel network system 100 is an intelligence-defined optical tunnel network system (OPTUNS) applicable to an edge data center to replace the complex, multi-layered, and power-switched network system of an existing data center.

[0234] like Figure 1 As shown, in some embodiments, the intelligent defined optical tunnel network system 100 includes a first layer network T1 and a second layer network T2. The first layer network T1 and the second layer network T2 are connected to each other by single mode optical fiber. In some embodiments, the first layer network T1 and the second layer network T2 are optical switching networks.

[0235] like Figure 1 As shown, in some embodiments, the first layer network T1 includes a plurality of groups, such as groups P1 to P4. Figure 1 In the embodiment shown, groups P1 to P4 are optical node groups. For ease of understanding and simplified description, not all groups of the first layer network T1 are shown. Figure 1 middle.

[0236] Each of the groups P1 to P4 in the first layer network T1 includes a plurality of optical add-drop sub-systems (OADSs) 200 as optical nodes. The optical add-drop sub-systems 200 are used to transmit data through a plurality of top switches (such as top switches ToRa and ToRb) and servers in a plurality of cabinets (such as cabinets 900a and 900b). Figure 1 As shown, in some embodiments, each of the groups P1-P4 includes five optical plug-in subsystems 200. For ease of illustration, only two sets of top switches and cabinets (i.e., top switch ToRa and cabinet 900a, top switch ToRb and cabinet 900b) are shown. Figure 1 middle.

[0237] In actual operation, all optical plug-in subsystems 200 are connected to corresponding servers through corresponding top switches to perform data transmission. Further, the number of optical plug-in subsystems 200 included in each of the groups P1-P4 can be adjusted according to actual needs. Figure 1 This is merely illustrative and does not limit the present disclosure.

[0238] Each optical plug-in subsystem 200 in groups P1 to P4 includes at least two transmission modules. Take optical plug-in subsystem 200a as an example. Optical plug-in subsystem 200a includes a first transmission module 210 and a second transmission module 220. The first transmission module 210 is used to perform data transmission through a group of wavelengths in the first wavelength group. The second transmission module 220 is used to perform data transmission through a group of wavelengths in the second wavelength group. In some embodiments, the first transmission module 210 and the second transmission module 220 are optical transmission modules. Figure 1 As shown, each first transmission module 210 of the optical plugging subsystem 200 in the same group is connected to the first transmission module 210 of the adjacent optical plugging subsystem 200 in the same group, thereby forming a first transmission ring. For example, in group P1, the first transmission module 210 of the optical plugging subsystem 200a is connected to the first transmission module 210 of the optical plugging subsystem 200b and the first transmission module 210 of the optical plugging subsystem 200e. Similarly, each second transmission module 220 of the optical plugging subsystem 200 in the same group is connected to the second transmission module 220 of the adjacent optical plugging subsystem 200 in the same group, thereby forming a second transmission ring. In some embodiments, the first transmission modules 210 in the first transmission ring are connected to each other through optical fibers, and the second transmission modules 220 in the second transmission ring are connected to each other through optical fibers.

[0239] like Figure 1As shown, in some embodiments, the second layer network T2 includes a plurality of optical switch interconnect subsystems (Optical Switch Interconnect Subsystem, OSIS) 400a~400e as optical nodes. Structurally, any two of the optical switch interconnect subsystems 400a~400e transmit corresponding transverse transmission optical signals through corresponding first lines to achieve communication between each optical switch interconnect subsystem 400a~400e. In other words, the optical switch interconnect subsystems 400a~400e are interconnected with optical fibers in a structure similar to a mesh network, so that the optical fiber network between any pair of optical switch interconnect subsystems 400a~400e and the optical fiber network between any other pair of optical switch interconnect subsystems 400a~400e operate independently of each other. In some embodiments, the optical fiber network between the optical switch interconnect subsystems 400a~400e can be implemented by ribbon fibers. Therefore, the connection between the optical switching connection subsystems 400a-400e also looks like a ring grid structure R2.

[0240] The optical switching connection subsystems 400a-400e are respectively used to receive optical signals from the optical plug-in subsystem 200 in the first layer network T1, and perform routing switching and optical wavelength switching before transmitting the optical signals to another optical plug-in subsystem 200 in the first layer network T1.

[0241] The software-defined network controller (SDN controller) 500 is used to output corresponding control signals to each top switch ToRa, ToRb, optical plug-in subsystem 200a~200e, optical switching connection subsystem 400a~400e to establish an optical tunnel network and schedule the optical tunnel. In this way, each server can use optical signals to realize data transmission in the system through the optical fiber network in the first layer network T1 and the second layer network T2.

[0242] It is worth noting that Figure 1 The number of optical switching connection subsystems 400a-400e and optical plug-in subsystems 200 shown in the figure is only an example and is not intended to limit the present disclosure. In different embodiments, the number of optical switching connection subsystems 400a-400e and optical plug-in subsystems 200a-200e in the intelligent defined optical tunnel network system 100 can be gradually increased and / or decreased according to actual needs, and the normal operation of the intelligent defined optical tunnel network system 100 can be maintained. Therefore, the intelligent defined optical tunnel network system 100 has a high degree of deployment flexibility.

[0243] In this way, in the intelligently defined optical tunnel network system 100, by selecting a specific optical switching connection subsystem 400a~400e and an optical plug-in subsystem 200a~200e and a wavelength combination of the optical signal, an optical tunnel (i.e., an optical path plus an optical wavelength combination) for data exchange between cabinets can be established to achieve ultra-low latency in data transmission.

[0244] In addition, in some embodiments, the intelligent defined optical tunnel network system 100 may use Dense Wavelength Division Multiplexing (DWDM) technology, and utilize a DWDM transceiver to allow multiple optical wavelengths to simultaneously transmit data in the intelligent defined optical tunnel network system 100. However, the intelligent defined optical tunnel network system 100 in the present disclosure is not limited to DWDM technology, and the intelligent defined optical tunnel network system 100 may also use other wavelength division multiplexing (Wavelength Division Multiplexing, WDM) or other equivalent multiplexed optical transmission technologies. In this way, the intelligent defined optical tunnel network system 100 can achieve low latency, high bandwidth, and low energy consumption, and has better performance than the electrical switching network system used in the existing traditional data center.

[0245] The following paragraphs illustrate the optical plug-in subsystems 200a-200e. Figure 2 , Figure 2 FIG. 2 is a schematic diagram of an optical plug-in subsystem 200 according to some embodiments of the present disclosure. The optical plug-in subsystem 200 is a core switching node for establishing a first layer network T1 inter-cabinet optical tunnel for transmitting data. Figure 2 As shown, the optical plug-in subsystem 200 includes more than two independent transmission modules, such as a first transmission module 210 and a second transmission module 220 .

[0246] like Figure 2As shown, the first transmission module 210 and the second transmission module 220 both include multiplexers 212 and 222 as input submodules, and include switching submodules 214 and 224, and include demultiplexers 216 and 226 as output submodules. In detail, the switching submodule 214 in the first transmission module 210 includes a first optical signal amplifier ED211, a first optical splitter SP211, a first wavelength selection switch WS211, a second wavelength selection switch WS212, a second optical signal amplifier ED212, a second optical splitter SP212, a third wavelength selection switch WS213, a fourth wavelength selection switch WS214, a third optical splitter SP213 and a third optical signal amplifier ED213. Similarly, the switching submodule 224 in the second transmission module 220 includes a first optical signal amplifier ED221, a first optical splitter SP221, a first wavelength selective switch WS221, a second wavelength selective switch WS222, a second optical signal amplifier ED222, a second optical splitter SP222, a third wavelength selective switch WS223, a fourth wavelength selective switch WS224, a third optical splitter SP223 and a third optical signal amplifier ED223.

[0247] The multiplexer 212 connected to the top-mounted switch ToR is used to receive a plurality of upload optical signals UL1-UL8 from the top-mounted switch ToR through a plurality of input ports and integrate the upload optical signals UL1-UL8 into a synthesized optical signal Sig11, wherein each of the upload optical signals UL1-UL8 has a respective wavelength. The first optical signal amplifier ED211 is coupled to the multiplexer 212 and is used to amplify the synthesized optical signal Sig11 and output the amplified synthesized optical signal Sig11'. The first optical splitter SP211 is located on the first transmission ring RING1 and is coupled to the first optical signal amplifier ED211. The first optical splitter SP211 is used to receive and replicate the amplified synthesized optical signal Sig11' into a first lateral transmission optical signal Ls11 and a first uplink transmission optical signal Us11, transmit the first lateral transmission optical signal Ls11 through the first transmission ring RING1, and output the first uplink transmission optical signal Us11. The first wavelength selective switch WS211 is coupled to the first optical splitter SP211. The first wavelength selective switch WS211 is used to receive the first uplink transmission optical signal Us11 from the first optical splitter SP211 and transmit the second uplink transmission optical signal Us12 to the optical switching connection subsystem 400a through the first longitudinal end 211. The second wavelength selective switch WS212 is located on the first transmission ring RING1 and coupled to the first optical splitter SP211. The second wavelength selective switch WS212 is used to receive the first lateral transmission optical signal Ls11 from the first optical splitter SP211 and output the second lateral transmission optical signal Ls12. The second optical signal amplifier ED212 is located on the first transmission ring RING1 and coupled to the second wavelength selective switch WS212. The second optical signal amplifier ED212 is used to receive and amplify the second lateral transmission optical signal Ls12 and output the amplified second lateral transmission optical signal Ls12' to the first transmission module 210 of another optical plug-in subsystem 200 in the same group.

[0248] The second optical splitter SP212 is located on the first transmission ring RING1. The second optical splitter SP212 is used to receive and replicate the amplified second lateral transmission optical signal Ls12' into the first downstream transmission optical signal Ds11 and the third lateral transmission optical signal Ls13, and transmit the third lateral transmission optical signal Ls13 to the first optical splitter S211. The amplified second lateral transmission optical signal Ls12' is received from the first transmission module 210 of another optical plug-in subsystem 200 in the same group. The third wavelength selection switch WS213 is coupled to the second optical splitter SP212. The third wavelength selection switch WS213 is used to receive the first downstream transmission optical signal Ds11 from the second optical splitter SP212 and output the second downstream transmission optical signal Ds12. The fourth wavelength selection switch WS214 is used to receive the third downstream transmission optical signal Ds13 from the optical switching connection subsystem 400a and output the fourth downstream transmission optical signal Ds14. The third optical splitter SP213 is coupled to the third wavelength selective switch WS213 and the fourth wavelength selective switch WS214. The third optical splitter SP213 is used to receive the second downstream transmission optical signal Ds12 from the third wavelength selective switch WS213, receive the fourth downstream transmission optical signal Ds14 from the fourth wavelength selective switch WS214, integrate the second downstream transmission optical signal Ds12 and the fourth downstream transmission optical signal Ds14 into the fifth downstream transmission optical signal Ds15, integrate the second downstream transmission optical signal Ds12 and the fourth downstream transmission optical signal Ds14 into the sixth downstream transmission optical signal Ds16, and output the fifth downstream transmission optical signal Ds15 and the sixth downstream transmission optical signal Ds16. The third optical signal amplifier ED213 is coupled to the third optical splitter SP213. The third optical signal amplifier ED213 is used to receive the fifth downstream transmission optical signal Ds15 and the sixth downstream transmission optical signal Ds16, amplify the fifth downstream transmission optical signal Ds15 and the sixth downstream transmission optical signal Ds16, and output the amplified fifth downstream transmission optical signal Ds15' and the amplified sixth downstream transmission optical signal Ds16'. The demultiplexer 213 is coupled to the third optical signal amplifier ED213 and connected to the top switch ToR. The demultiplexer 216 is used to receive and demultiplex the amplified fifth downstream transmission optical signal Ds15' and the amplified sixth downstream transmission optical signal Ds16' into a plurality of downlink optical signals DL1-DL8, and transmit the downlink optical signals DL1-DL8 to the top switch ToR.

[0249] Regarding the components in the switching submodule 224 of the second transmission module 220, their functions and operations may refer to their counterparts in the switching submodule 214. The functions and operations of the demultiplexer 222 of the second transmission module 220 may refer to the demultiplexer 212 of the first transmission module 210 in the embodiment described later. The functions and operations of the first optical signal amplifier ED221 of the switching submodule 224 may refer to the first optical signal amplifier ED211 of the switching submodule 214 in the embodiment described later. The functions and operations of the first optical splitter SP221 of the switching submodule 224 may refer to the first optical splitter SP211 of the switching submodule 214 in the embodiment described later. The functions and operations of the first wavelength selective switch WS221 of the switching submodule 224 may refer to the first wavelength selective switch WS211 of the switching submodule 214 in the embodiment described later. The functions and operations of the second wavelength selective switch WS222 of the switching submodule 224 may refer to the second wavelength selective switch WS212 of the switching submodule 214 in the embodiment described later. The function and operation of the second optical signal amplifier ED222 of the switching submodule 224 may refer to the second optical signal amplifier ED212 of the switching submodule 214 in the embodiment described later. The function and operation of the second optical splitter SP222 of the switching submodule 224 may refer to the second optical splitter SP212 of the switching submodule 214 in the embodiment described later. The third wavelength selection switch WS223 of the switching submodule 224 may refer to the third wavelength selection switch WS213 of the switching submodule 214 in the embodiment described later. The fourth wavelength selection switch WS224 of the switching submodule 224 may refer to the fourth wavelength selection switch WS214 of the switching submodule 214 in the embodiment described later. The function and operation of the third optical splitter SP223 of the switching submodule 224 may refer to the third optical splitter SP213 of the switching submodule 214 in the embodiment described later. The function and operation of the third optical signal amplifier ED223 of the switching submodule 224 may refer to the third optical signal amplifier ED213 of the switching submodule 214 in the embodiment described later. The function and operation of the demultiplexer 226 of the second transmission module 220 may refer to the demultiplexer 216 of the first transmission module 210 in the embodiments described below.

[0250] Each input end of the multiplexer 212, 222 is coupled to the transmission end of the different optical wave density division multiplexing optical transceiver modules (DWDM transceiver) on the upper connection end of the top switch ToR in the cabinet through an optical fiber. The main function of the switching submodule 214, 224 is to allow the synthesized optical signals Sig11, Sig21 transmitted from the input submodule (i.e., the multiplexer 212, 222) to continue to be uploaded to the optical switching connection subsystem 400a, 400e in the second layer network or to be transmitted eastward or westward to other optical plug-in subsystems 200 in the same group, and to allow the optical signals transmitted from other optical plug-in subsystems 200 in the same group to be exchanged to the receiving submodules 216, 226. For example, Figure 1 The optical plug-in subsystem 200 in group P2 can transmit optical signals to the other four optical plug-in subsystems 200 in group P2, and receive optical signals from these four optical plug-in subsystems 200. Figure 1 The optical plug-in subsystem 200 in each group can transmit optical signals to the other four optical plug-in subsystems 200 in the same group and receive optical signals from the four optical plug-in subsystems 200.

[0251] The following is a detailed description of the optical plugging subsystem 200. For simplicity, the first transmission module 210 of the optical plugging subsystem 200 will be used as an example in the following paragraphs to illustrate the operation of each component in the optical plugging subsystem 200. Each component and its operation in the second transmission module 220 is similar to its counterpart in the first transmission module 210.

[0252] like Figure 2 As shown, in terms of structure, the first optical signal amplifier ED211 is coupled to the multiplexer 212 and the first optical splitter SP211. The first optical signal amplifier ED211 is used to amplify the synthesized optical signal Sig11 and output the amplified synthesized optical signal Sig11' to the first optical splitter SP211. In some embodiments, the first optical signal amplifier ED211 can be implemented by an erbium doped fiber amplifier (EDFA).

[0253] like Figure 2As shown, in terms of structure, the first optical splitter SP211 is located on the first transmission ring RING1 and is coupled to the first optical signal amplifier ED211, the first wavelength selective switch WS211, the second wavelength selective switch WS212 and the second optical splitter SP212. The first optical splitter SP211 is used to receive and replicate the amplified composite optical signal Sig11' into a first lateral transmission optical signal Ls11 and a first uplink transmission optical signal Us11, transmit the first lateral transmission optical signal Ls11 to the second wavelength selective switch WS212 through the first transmission ring RING1, and output the first uplink transmission optical signal Us11 to the first wavelength selective switch WS211.

[0254] like Figure 2 As shown, in structure, the first wavelength selective switch WS211 is coupled to the first optical splitter SP211 and the optical switching connection subsystem 400a. The first wavelength selective switch WS211 is used to receive the first uplink transmission optical signal Us11 from the first optical splitter SP211 and transmit the second uplink transmission optical signal Us12 to the optical switching connection subsystem 400a through the first longitudinal end 211.

[0255] In detail, the first WSS WS211 is a 1x1 (one input port and one output port) WSS that allows signals with a specific wavelength to pass through.

[0256] like Figure 2 As shown, in terms of structure, the second wavelength selective switch WS212 is located on the first transmission ring RING1 and coupled to the first optical splitter SP211 and the second optical signal amplifier ED212. The second wavelength selective switch WS212 is used to receive the first side transmission optical signal Ls11 from the first optical splitter SP211 and output the second side transmission optical signal Ls12 to the second optical signal amplifier ED212.

[0257] In detail, the second WSS WS212 is a 1x1 (one input port and one output port) WSS that allows signals with specific wavelengths to pass through.

[0258] like Figure 2 As shown, in terms of structure, the second optical signal amplifier ED212 is located on the first transmission ring RING1 and is coupled to the second wavelength selective switch WS212 and the second optical splitter SP212 of another optical plug-in subsystem 200. The second optical signal amplifier ED212 is used to receive the second side transmission optical signal Ls12 from the second wavelength selective switch WS212, amplify the second side transmission optical signal Ls12, and output the amplified second side transmission optical signal Ls12' to the first transmission module 210 of another optical plug-in subsystem 200 in the same group. In other words, in Figure 2In an embodiment, the second optical signal amplifier ED212 amplifies the power of the optical signal transmitted to the west to ensure that the optical signal has sufficient power to reach the destination. It should be noted that the present disclosure does not limit the transmission direction to the west. In practical applications, the transmission direction can be adjusted according to the network structure. In one embodiment, the second optical signal amplifier ED212 can be implemented by an erbium-doped fiber amplifier.

[0259] like Figure 2 As shown, in terms of structure, the second optical splitter SP212 is located on the first transmission ring RING1 and is coupled to the third wavelength selective switch WS213, the first optical splitter SP211 and the second optical signal amplifier ED212 of another optical plugging subsystem 200. The second optical splitter SP212 is used to receive and replicate and amplify the second side transmission optical signal Ls12' into the first downlink transmission optical signal Ds11 and the third side transmission optical signal Ls13, transmit the first downlink transmission optical signal Ds11 to the third wavelength selective switch WS213, and transmit the third side transmission optical signal Ls13 to the first optical splitter SP211 through the first transmission ring RING1. The amplified second side transmission optical signal Ls12' is received from the first transmission module 210 of another optical plugging subsystem 200 in the same group.

[0260] In detail, the second optical splitter SP212 is a 1x2 (one input port and two output ports) optical splitter, which replicates the second side-transmitted optical signal Ls12' and splits it into two light beams. Figure 2 In the embodiment of FIG. 1 , one of the two light beams continues to be transmitted westward to other light plug-in subsystems 200 in the same group, and the other of the two light beams is transmitted downward to the optical receiving module (i.e., the demultiplexer 216). It should be noted that the present disclosure does not limit the transmission direction to the west. In practical applications, the transmission direction can be adjusted according to the network structure.

[0261] like Figure 2 As shown, the third wavelength selective switch WS213 is coupled to the second optical splitter SP212 and the third optical splitter SP213. The third wavelength selective switch WS213 is used to receive the first downstream transmission optical signal Ds11 from the second optical splitter SP212 and output the second downstream transmission optical signal Ds12 to the third optical splitter SP213.

[0262] In detail, the third wavelength selective switch WS213 is a 1x1 (one input port and one output port) wavelength selective switch, which allows signals with specific wavelengths to pass through.

[0263] like Figure 2As shown, the fourth wavelength selective switch WS214 is coupled to the optical switching connection subsystem 400a and the third optical splitter SP213. The fourth wavelength selective switch WS214 is used to receive the third downstream transmission optical signal Ds13 from the optical switching connection subsystem 400a and output the fourth downstream transmission optical signal Ds14 to the third optical splitter SP213.

[0264] In detail, the fourth wavelength selective switch WS214 is a 1x1 (one input port and one output port) wavelength selective switch, which allows signals with specific wavelengths to pass through.

[0265] like Figure 2 As shown, in terms of structure, the third optical splitter SP213 is coupled to the third wavelength selective switch WS213, the fourth wavelength selective switch WS214 and the third optical signal amplifier ED213. The third optical splitter SP213 is used to receive the second downstream transmission optical signal Ds12 from the third wavelength selective switch WS213, receive the fourth downstream transmission optical signal Ds14 from the fourth wavelength selective switch WS214, integrate the second downstream transmission optical signal Ds12 and the fourth downstream transmission optical signal Ds14 into the fifth downstream transmission optical signal Ds15, integrate the second downstream transmission optical signal Ds12 and the fourth downstream transmission optical signal Ds14 into the sixth downstream transmission optical signal Ds16, and transmit the fifth downstream transmission optical signal Ds15 and the sixth downstream transmission optical signal Ds16 to the third optical signal amplifier ED213. Therefore, through the combination of the third wavelength selective switch WS213, the fourth wavelength selective switch WS214 and the third optical splitter SP213, a 2x2 (two input ports and two output ports) wavelength selective switch is realized.

[0266] like Figure 2 As shown, the third optical signal amplifier ED213 is coupled to the third optical splitter SP213 and the demultiplexer 216. The third optical signal amplifier ED213 is used for receiving the fifth downlink transmission optical signal Ds15 and the sixth downlink transmission optical signal Ds16 from the third optical splitter SP213, amplifying the fifth downlink transmission optical signal Ds15 and the sixth downlink transmission optical signal Ds16, and outputting the amplified fifth downlink transmission optical signal Ds15' and the amplified sixth downlink transmission optical signal Ds16' to the demultiplexer 216.

[0267] like Figure 2As shown, in terms of structure, the demultiplexer 216 is coupled to the third optical signal amplifier ED213 and connected to the top switch ToR. The demultiplexer 216 is used to receive the amplified fifth downlink transmission optical signal Ds15' and the amplified sixth downlink transmission optical signal Ds16' from the third optical signal amplifier ED213, demultiplex the amplified fifth downlink transmission optical signal Ds15' and the amplified sixth downlink transmission optical signal Ds16' into a plurality of downlink optical signals DL1-DL8, and transmit the downlink optical signals DL1-DL8 to the top switch ToR.

[0268] In addition, in some embodiments, the first splitter SP211 is further used to receive a third lateral transmission optical signal Ls13 from the second splitter SP212, copy the third lateral transmission optical signal Ls13 into a fourth lateral transmission optical signal Ls14 and a third uplink transmission optical signal Us13, transmit the fourth lateral transmission optical signal Ls14 through the first transmission ring RING1, and transmit the third uplink transmission optical signal Us13 to the optical switching connection subsystem 400a through the first longitudinal end 211.

[0269] In detail, the first optical splitter SP211 is a 2x2 (two input ends and two output ends) optical splitter. One of the two input ends is used to receive the amplified composite optical signal Sig11' from the first optical signal amplifier ED211, and the other of the two input ends is used to receive the third side transmission optical signal Ls13 from the second optical splitter SP212. One of the two output ends is used to output the first side transmission optical signal Ls11 or the fourth side transmission optical signal Ls14 to the second wavelength selection switch W212, and the other of the two output ends is used to output the first uplink transmission optical signal Us11 or the third uplink transmission optical signal Us13 to the first wavelength selection switch WS211.

[0270] The above is a detailed description of each component of the optical plug-in subsystem 200. However, in some embodiments, the third optical splitter SP213 and the third optical signal amplifier ED213 of the optical plug-in subsystem 200 can be swapped, and these changes will not affect the function and operation of the optical plug-in subsystem 200. Please refer to Figure 3 . Figure 3 FIG. 3 is a schematic diagram of an optical plug-in subsystem 300 according to some embodiments of the present disclosure. Figure 3As shown, the first transmission module 310 and the second transmission module 320 both include multiplexers 312, 322 as input submodules, include switching submodules 314, 324, and include demultiplexers 316, 326 as output submodules. In detail, the switching submodule 314 in the first transmission module 310 includes a first optical signal amplifier ED311, a first optical splitter SP311, a first wavelength selection switch WS311, a second wavelength selection switch WS312, a second optical signal amplifier ED312, a second optical splitter SP312, a third wavelength selection switch WS313, a fourth wavelength selection switch WS314, a third optical signal amplifier ED313, and a third optical splitter SP313. Similarly, the switching submodule 324 in the second transmission module 320 includes a first optical signal amplifier ED321, a first optical splitter SP321, a first wavelength selective switch WS321, a second wavelength selective switch WS322, a second optical signal amplifier ED322, a second optical splitter SP322, a third wavelength selective switch WS323, a fourth wavelength selective switch WS324, a third optical signal amplifier ED323 and a third optical splitter SP323.

[0271] The multiplexer 312 connected to the top switch ToR is used to receive a plurality of upload optical signals UL1-UL8 from the top switch ToR through a plurality of input ports, and integrate the upload optical signals UL1-UL8 into a synthesized optical signal Sig31, wherein each of the upload optical signals UL1-UL8 has its own wavelength. The first optical signal amplifier ED311 is coupled to the multiplexer 312 and is used to amplify the synthesized optical signal Sig31 and output the amplified synthesized optical signal Sig31'. The first optical splitter SP311 is located on the first transmission ring RING1 and is coupled to the first optical signal amplifier ED311. The first optical splitter SP311 is used to receive and copy the amplified synthesized optical signal Sig31' into a first lateral transmission optical signal Ls31 and a first uplink transmission optical signal Us31, transmit the first lateral transmission optical signal Ls31 through the first transmission ring RING1, and output the first uplink transmission optical signal Us31. The first wavelength selection switch WS311 is coupled to the first optical splitter SP311. The first wavelength selective switch WS311 is used to receive the first uplink transmission optical signal Us31 from the first optical splitter SP311 and transmit the second uplink transmission optical signal Us32 to the optical switching connection subsystem 400a through the first longitudinal end 311. The second wavelength selective switch WS312 is located on the first transmission ring RING1 and coupled to the first optical splitter S311. The second wavelength selective switch WS312 is used to receive the first lateral transmission optical signal Ls31 from the first optical splitter SP311 and output the second lateral transmission optical signal Ls32. The second optical signal amplifier ED312 is located on the first transmission ring RING1 and coupled to the second wavelength selective switch WS312. The second optical signal amplifier ED312 is used to receive and amplify the second lateral transmission optical signal Ls32 and output the amplified second lateral transmission optical signal Ls32' to the first transmission module 310 of another optical plug-in subsystem 300 in the same group.

[0272] The second optical splitter SP312 is located on the first transmission ring RING1. The second optical splitter SP312 is used to receive and replicate and amplify the second lateral transmission optical signal Ls32' into the first downstream transmission optical signal Ds31 and the third lateral transmission optical signal Ls33, output the first downstream transmission optical signal Ds31, and transmit the third lateral transmission optical signal Ls33 to the first optical splitter SP311. The amplified second lateral transmission optical signal Ls32' is received from the first transmission module 310 of another optical plug-in subsystem 300 in the same group. The third wavelength selection switch WS313 is coupled to the second optical splitter SP312. The third wavelength selection switch WS313 is used to receive the first downstream transmission optical signal Ds11 from the second optical splitter SP312 and output the second downstream transmission optical signal Ds32. The fourth wavelength selection switch WS314 is used to receive the third downstream transmission optical signal Ds33 from the optical switching connection subsystem 400a and output the fourth downstream transmission optical signal Ds34.

[0273] The third optical signal amplifier ED313 is coupled to the third wavelength selection switch WS313 and the fourth wavelength selection switch WS314. The third optical signal amplifier ED313 is used to receive the second downstream transmission optical signal Ds32 from the third wavelength selection switch WS313, receive the fourth downstream transmission optical signal Ds34 from the fourth wavelength selection switch WS314, amplify the second downstream transmission optical signal Ds32 and the fourth downstream transmission optical signal Ds34, and output the amplified second downstream transmission optical signal Ds32' and the amplified fourth downstream transmission optical signal Ds34'. The third optical splitter SP313 is coupled to the third optical signal amplifier ED313. The third optical splitter SP313 is used to receive the amplified second downstream transmission optical signal Ds32' and the amplified fourth downstream transmission optical signal Ds34' from the third optical signal amplifier ED313, integrate the amplified second downstream transmission optical signal Ds32' and the amplified fourth downstream transmission optical signal Ds34' into a fifth downstream transmission optical signal Ds35, integrate the amplified second downstream transmission optical signal Ds32' and the amplified fourth downstream transmission optical signal Ds34' into a sixth downstream transmission optical signal Ds36, and output the fifth downstream transmission optical signal Ds35 and the sixth downstream transmission optical signal Ds36. The demultiplexer 316 is coupled to the third optical splitter SP313 and connected to the top switch ToR. The demultiplexer 316 is used to receive and demultiplex the fifth downstream transmission optical signal Ds35 and the sixth downstream transmission optical signal Ds36 into a plurality of downlink optical signals DL1-DL8, and transmit the downlink optical signals DL1-DL8 to the top switch ToR.

[0274] Regarding the components in the switching submodule 324 of the second transmission module 320, their functions and operations can refer to their counterparts in the switching submodule 314. The functions and operations of the multiplexer 322 of the second transmission module 320 can refer to the multiplexer 312 of the first transmission module 310 in the embodiment described later. The functions and operations of the first optical signal amplifier ED312 of the switching submodule 324 can refer to the first optical signal amplifier ED311 of the switching submodule 314 in the embodiment described later. The functions and operations of the first optical splitter SP321 of the switching submodule 324 can refer to the first optical splitter SP311 of the switching submodule 314 in the embodiment described later. The functions and operations of the first wavelength selective switch WS321 of the switching submodule 324 can refer to the first wavelength selective switch WS311 of the switching submodule 314 in the embodiment described later. The functions and operations of the second wavelength selective switch WS322 of the switching submodule 324 can refer to the second wavelength selective switch WS312 of the switching submodule 314 in the embodiment described later. The function and operation of the second optical signal amplifier ED322 of the switching submodule 324 may refer to the second optical signal amplifier ED312 of the switching submodule 314 in the embodiment described later. The function and operation of the second optical splitter SP322 of the switching submodule 324 may refer to the second optical splitter SP312 of the switching submodule 314 in the embodiment described later. The function and operation of the third wavelength selection switch WS323 of the switching submodule 324 may refer to the third wavelength selection switch WS313 of the switching submodule 314 in the embodiment described later. The function and operation of the fourth wavelength selection switch WS324 of the switching submodule 324 may refer to the fourth wavelength selection switch WS314 of the switching submodule 314 in the embodiment described later. The function and operation of the third optical signal amplifier ED323 of the switching submodule 324 may refer to the third optical signal amplifier ED313 of the switching submodule 314 in the embodiment described later. The function and operation of the third optical splitter SP323 of the switching submodule 324 may refer to the third optical splitter SP313 of the switching submodule 314 in the embodiment described later. The function and operation of the demultiplexer 326 of the second transmission module 320 may refer to the demultiplexer 316 of the first transmission module 310 in the embodiments described below.

[0275] The following is a detailed description of the optical plugging subsystem 300. For the sake of brevity, the first transmission module 310 of the optical plugging subsystem 300 will be used as an example in the following paragraphs to illustrate the operation of each component in the optical plugging subsystem 300. The components and operations of the second transmission module 320 are similar to their counterparts in the first transmission module 310.

[0276] like Figure 3As shown, in terms of structure, the first optical signal amplifier ED311 is coupled to the multiplexer 312 and the first optical splitter SP311. The first optical signal amplifier ED311 is used to receive the synthesized optical signal Sig31 from the multiplexer 312, amplify the synthesized optical signal Sig31, and output the amplified synthesized optical signal Sig31' to the first optical splitter SP311. In some embodiments, the first optical signal amplifier ED311 can be implemented by an erbium-doped fiber amplifier.

[0277] like Figure 3 As shown, in terms of structure, the first optical splitter SP311 is located on the first transmission ring RING1 and is coupled to the first optical signal amplifier ED311, the first wavelength selective switch WS311, the second wavelength selective switch WS312 and the second optical splitter SP312. The first optical splitter SP311 is used to receive the amplified synthesized optical signal Sig31' from the first optical signal amplifier ED311, replicate the amplified synthesized optical signal Sig31' into a first lateral transmission optical signal Ls31 and a first uplink transmission optical signal Us31, transmit the first lateral transmission optical signal Ls31 to the second wavelength selective switch WS312 through the first transmission ring RING1, and output the first uplink transmission optical signal Us31 to the first wavelength selective switch WS311.

[0278] like Figure 3 As shown, in structure, the first wavelength selective switch WS311 is coupled to the first optical splitter SP311 and the optical switching connection subsystem 400a. The first wavelength selective switch WS311 is used to receive the first uplink transmission optical signal Us31 from the first optical splitter SP311 and transmit the second uplink transmission optical signal Us32 to the optical switching connection subsystem 400a through the first longitudinal end 311.

[0279] In detail, the first wavelength selective switch WS311 is a 1x1 (one input port and one output port) wavelength selective switch, which allows signals with specific wavelengths to pass through.

[0280] like Figure 3 As shown, in terms of structure, the second wavelength selective switch WS312 is located on the first transmission ring RING1 and coupled to the first optical splitter SP311 and the second optical signal amplifier ED312. The second wavelength selective switch WS312 is used to receive the first side transmission optical signal Ls31 from the first optical splitter SP311 and output the second side transmission optical signal Ls32 to the second optical signal amplifier ED312.

[0281] In detail, the second wavelength selective switch WS312 is a 1x1 (one input port and one output port) wavelength selective switch, which allows signals with specific wavelengths to pass through.

[0282] like Figure 3As shown, in terms of structure, the second optical signal amplifier ED312 is located on the first transmission ring RING1 and is coupled to the second wavelength selective switch WS312 and the second optical splitter SP312 of another optical plug-in subsystem 300. The second optical signal amplifier ED312 is used to receive the second side transmission optical signal Ls32 from the second wavelength selective switch WS312, amplify the second side transmission optical signal Ls32, and output the amplified second side transmission optical signal Ls32' to the first transmission module 310 of another optical plug-in subsystem 300 in the same group. In other words, in Figure 3 In the embodiment, the second optical signal amplifier ED312 amplifies the power of the optical signal transmitted to the west to ensure that the optical signal has sufficient power to reach the destination. It should be noted that the present disclosure does not limit the transmission direction to the west. In practical applications, the transmission direction can be adjusted according to the network structure. In one embodiment, the second optical signal amplifier ED312 can be implemented by an erbium-doped fiber amplifier.

[0283] like Figure 3 As shown, in terms of structure, the second optical splitter SP312 is located on the first transmission ring RING1 and is coupled to the third wavelength selective switch WS313, the first optical splitter SP311 and the second optical signal amplifier ED312 of another optical plug-in subsystem 300. The second optical splitter SP312 is used to receive and amplify the second lateral transmission optical signal Ls32' from the first transmission module 310 of another optical plug-in subsystem 300 in the same group, replicate and amplify the second lateral transmission optical signal Ls32' into the first downlink transmission optical signal Ds31 and the third lateral transmission optical signal Ls33, transmit the third lateral transmission optical signal Ls33 through the first transmission ring RING1, and output the first downlink transmission optical signal Ds31 to the third wavelength selective switch WS313.

[0284] In detail, the second optical splitter SP312 is a 1x2 (one input port and two output ports) optical splitter, which replicates the second side-transmitted optical signal Ls32' and splits it into two light beams. Figure 3 In the embodiment, one of the two light beams continues to transmit westward with a lower intensity to other light plug-in subsystems 300 in the same group P1, and the other of the two light beams transmits downward with a higher intensity to the optical receiving module (i.e., the demultiplexer 316). However, the present disclosure does not limit the transmission direction to the west. In practical applications, the transmission direction can be adjusted according to the network structure.

[0285] like Figure 3As shown, the third wavelength selective switch WS313 is coupled to the second optical splitter SP312 and the third optical signal amplifier ED313. The third wavelength selective switch WS313 is used to receive the first downstream transmission optical signal Ds31 from the second optical splitter SP312 and output the second downstream transmission optical signal Ds32 to the third optical signal amplifier ED313.

[0286] In detail, the third wavelength selective switch WS313 is a 1x1 (one input port and one output port) wavelength selective switch, which allows signals with specific wavelengths to pass through.

[0287] like Figure 3 As shown, the fourth wavelength selective switch WS314 is coupled to the third optical signal amplifier ED313 and the optical switching connection subsystem 400a. The fourth wavelength selective switch WS314 is used to receive the third downstream transmission optical signal Ds33 from the optical switching connection subsystem 400a and output the fourth downstream transmission optical signal Ds34 to the third optical signal amplifier ED313.

[0288] In detail, the fourth wavelength selective switch WS314 is a 1×1 (one input port and one output port) wavelength selective switch, which allows signals with specific wavelengths to pass through.

[0289] like Figure 3 As shown, in terms of structure, the third optical signal amplifier ED313 is coupled to the third wavelength selection switch WS313, the fourth wavelength selection switch WS314 and the third optical splitter SP313. The third optical signal amplifier ED313 is used to receive the second downstream transmission optical signal Ds32 from the third wavelength selection switch WS313, receive the fourth downstream transmission optical signal Ds34 from the fourth wavelength selection switch WS314, amplify the second downstream transmission optical signal Ds32 and the fourth downstream transmission optical signal Ds34, and output the amplified second downstream transmission optical signal Ds32' and the amplified fourth downstream transmission optical signal Ds34' to the third optical splitter SP313. In some embodiments, the third optical signal amplifier ED313 can be implemented by an erbium-doped fiber amplifier.

[0290] like Figure 3 As shown, in terms of structure, the third optical splitter SP313 is coupled to the third optical signal amplifier ED313 and the demultiplexer 316. The third optical splitter SP313 is used to receive the amplified second downstream transmission optical signal Ds32' and the amplified fourth downstream transmission optical signal Ds34' from the third optical signal amplifier ED313, integrate the amplified second downstream transmission optical signal Ds32' and the amplified fourth downstream transmission optical signal Ds34' into the fifth downstream transmission optical signal Ds35 and the sixth downstream transmission optical signal Ds36, and transmit the fifth downstream transmission optical signal Ds35 and the sixth downstream transmission optical signal Ds36 to the demultiplexer 316.

[0291] like Figure 3 As shown, in terms of structure, the demultiplexer 316 is coupled to the third optical splitter SP313 and connected to the top switch ToR. The demultiplexer 316 is used to receive the fifth downlink transmission optical signal Ds35 and the sixth downlink transmission optical signal Ds36 from the third optical splitter SP313, demultiplex the fifth downlink transmission optical signal Ds35 and the sixth downlink transmission optical signal Ds36 into a plurality of downlink optical signals DL1-DL8, and transmit the downlink optical signals DL1-DL8 to the top switch ToR.

[0292] In addition, in some embodiments, the first splitter SP311 is further used to receive a third lateral transmission optical signal Ls33 from the second splitter SP312, copy the third lateral transmission optical signal Ls33 into a fourth lateral transmission optical signal Ls34 and a third uplink transmission optical signal Us33, transmit the fourth lateral transmission optical signal Ls34 through the first transmission ring RING1, and transmit the third uplink transmission optical signal Us33 to the optical switching connection subsystem 400a through the first longitudinal end 311.

[0293] In detail, the first optical splitter SP311 is a 2x2 (two input ends and two output ends) optical splitter. One of the two input ends is used to receive the amplified composite optical signal Sig31' from the first optical signal amplifier ED311, and the other of the two input ends is used to receive the third side transmission optical signal Ls33 from the second optical splitter SP312. One of the two output ends is used to output the first side transmission optical signal Ls31 or the fourth side transmission optical signal Ls34 to the second wavelength selection switch W312, and the other of the two output ends is used to output the first uplink transmission optical signal Us31 or the third uplink transmission optical signal Us33 to the first wavelength selection switch WS311.

[0294] The above is a description of the optical plug-in subsystem 300. The present disclosure also discloses another embodiment of the optical plug-in subsystem switch module of the first layer network T1. Figure 4 . Figure 4 FIG. 4 is a schematic diagram of an optical plug-in subsystem 400 according to some embodiments of the present disclosure. The optical plug-in subsystem 400 is a core switching node for establishing an inter-cabinet optical tunnel of a first layer network T1 for transmitting data. Figure 4 As shown, the optical plug-in subsystem 400 includes more than two independent transmission modules, such as a first transmission module 410 and a second transmission module 420 .

[0295] like Figure 4As shown, the first transmission module 410 and the second transmission module 420 both include multiplexers 412, 422 as input submodules, include switching submodules 414, 424, and include demultiplexers 416, 426 as output submodules. In detail, the switching submodule 414 in the first transmission module 410 includes a first optical splitter SP411, a first optical signal amplifier ED411, a second optical splitter SP412, a first wavelength selection switch WS411, a second wavelength selection switch WS412, a second optical signal amplifier ED412, a third optical splitter SP413, and a third wavelength selection switch WS413. Similarly, the switching submodule 424 in the second transmission module 420 includes a first optical splitter SP421, a first optical signal amplifier ED421, a second optical splitter SP422, a first wavelength selective switch WS421, a second wavelength selective switch WS422, a second optical signal amplifier ED422, a third optical splitter SP423 and a third wavelength selective switch WS423.

[0296] The multiplexer 412 connected to the top-mounted switch ToR is used to receive a plurality of uplink optical signals UL1-UL8 from the top-mounted switch ToR through a plurality of input terminals, and integrate the uplink optical signals UL1-UL8 into a synthesized optical signal Sig51, wherein the first output terminal 411 of the multiplexer 412 is used to transmit the synthesized optical signal Sig51 to the optical switching connection subsystem 400a through the first longitudinal terminal 415, and the second output terminal 413 of the multiplexer 412 is used to output the synthesized optical signal Sig51. Each of the uplink optical signals UL1-UL8 has a respective corresponding wavelength. The first optical splitter SP411 is located on the first transmission ring RING1 and coupled to the multiplexer 412. The first optical splitter SP411 is used to receive the synthesized optical signal Sig51 from the second output terminal 413 of the multiplexer 412 and transmit the first side transmission optical signal Ls51 through the first transmission ring RING1. The first optical signal amplifier ED411 is located on the first transmission ring RING1 and coupled to the first optical splitter SP411. The first optical signal amplifier ED411 is used to amplify the first side transmission optical signal Ls51 and output the amplified first side transmission optical signal Ls51' to the first transmission module 410 of another optical plug-in subsystem 400 in the same group.

[0297] The second optical splitter SP412 is located on the first transmission ring RING1 and is used to receive and replicate the amplified first lateral transmission optical signal Ls51' into a first downstream transmission optical signal Ds51 and a second lateral transmission optical signal Ls52, and transmit the second lateral transmission optical signal Ls52 through the first transmission ring RING1. The amplified first lateral transmission optical signal Ls51' is received from the first transmission module 410 of another optical plug-in subsystem 400 in the same group. The first wavelength selection switch WS411 is used to receive the first downstream transmission optical signal Ds51 from the second optical splitter SP412 and output the second downstream transmission optical signal Ds52. The second wavelength selection switch WS412 is used to receive the third downstream transmission optical signal Ds53 from the optical switching connection subsystem 400a and output the fourth downstream transmission optical signal Ds54. The second optical signal amplifier ED412 is coupled to the second wavelength selection switch WS412. The second optical signal amplifier ED412 is used to amplify the fourth downstream transmission optical signal Ds54 and output the amplified fourth downstream transmission optical signal Ds54'. The third optical splitter SP413 is coupled to the first wavelength selection switch WS411 and the second optical signal amplifier ED412. The third optical splitter SP413 is used to receive the second downstream transmission optical signal Ds52 and amplify the fourth downstream transmission optical signal Ds54', integrate the second downstream transmission optical signal Ds52 and the amplified fourth downstream transmission optical signal Ds54' into the fifth downstream transmission optical signal Ds55 and the sixth downstream transmission optical signal Ds56, and output the fifth downstream transmission optical signal Ds55 and the sixth downstream transmission optical signal Ds56. The demultiplexer 416 is coupled to the third optical splitter SP413 and connected to the top switch ToR. The demultiplexer 416 is used for receiving and demultiplexing the fifth downlink transmission optical signal Ds55 and the sixth downlink transmission optical signal Ds56 into a plurality of downlink optical signals DL1 ˜ DL8 , and transmitting the downlink optical signals DL1 ˜ DL8 to the top-of-the-line switch ToR.

[0298] The third wavelength selective switch WS413 is located on the first transmission ring RING1 and coupled to the second optical splitter SP412. The third wavelength selective switch WS413 is used to receive the second side transmission optical signal Ls52 and output a third side transmission optical signal Ls53.

[0299] Regarding the components in the switching submodule 424 of the second transmission module 420, their functions and operations may refer to their counterparts in the switching submodule 414. The functions and operations of the multiplexer 422 of the second transmission module 420 may refer to the multiplexer 412 of the first transmission module 410 in the embodiment described later. The functions and operations of the first optical splitter SP421 of the switching submodule 424 may refer to the first optical splitter SP411 of the switching submodule 414 in the embodiment described later. The functions and operations of the first optical signal amplifier ED421 of the switching submodule 424 may refer to the first optical signal amplifier ED411 of the switching submodule 414 in the embodiment described later. The functions and operations of the second optical splitter SP422 of the switching submodule 424 may refer to the second optical splitter SP412 of the switching submodule 414 in the embodiment described later. The first wavelength selection switch WS421 of the switching submodule 424 may refer to the first wavelength selection switch WS411 of the switching submodule 414 in the embodiment described later. The second wavelength selection switch WS422 of the switching submodule 424 may refer to the second wavelength selection switch WS412 of the switching submodule 414 in the embodiment described later. The function and operation of the second optical signal amplifier ED422 of the switching submodule 424 may refer to the second optical signal amplifier ED412 of the switching submodule 414 in the embodiment described later. The function and operation of the third optical splitter SP423 of the switching submodule 424 may refer to the third optical splitter SP413 of the switching submodule 414 in the embodiment described later. The function and operation of the third wavelength selection switch WS423 of the switching submodule 424 may refer to the third wavelength selection switch WS413 of the switching submodule 414 in the embodiment described later. The function and operation of the demultiplexer 426 of the second transmission module 420 may refer to the demultiplexer 416 of the first transmission module 410 in the embodiment described later.

[0300] Each input end of the multiplexer 412, 422 is coupled to the transmission end of the different optical wave density division multiplexing optical transceiver modules (DWDM transceiver) on the upper connection end of the top switch ToR in the cabinet through an optical fiber. The main function of the switching submodule 414, 424 is to allow the synthesized optical signals Sig51, Sig61 transmitted from the input submodule (i.e., the multiplexer 412, 422) to continue to be uploaded to the optical switching connection subsystem 400a, 400e in the second layer network or to be transmitted eastward or westward to other optical plug-in subsystems 400 in the same group, and to allow the optical signals transmitted from other optical plug-in subsystems 400 in the same group to be exchanged to the receiving submodules 416, 426. For example, Figure 1 The optical plug-in subsystem 400 in group P2 can transmit optical signals to the other four optical plug-in subsystems 400 in group P2, and receive optical signals from these four optical plug-in subsystems 400. Figure 1The optical plug-in subsystem 400 in each group can transmit optical signals to the other four optical plug-in subsystems 400 in the same group and receive optical signals from the four optical plug-in subsystems 400.

[0301] The following is a detailed description of the light plugging subsystem 400. For simplicity, the first transmission module 410 of the light plugging subsystem 400 will be used as an example in the following paragraphs to illustrate the operation of each component in the light plugging subsystem 400. Each component and its operation in the second transmission module 420 is similar to its counterpart in the first transmission module 410.

[0302] like Figure 4 As shown, in terms of structure, the first optical splitter SP411 is located on the first transmission ring RING1 and is coupled to the multiplexer 412 (specifically, the second output terminal 413 of the multiplexer 412), the first optical signal amplifier ED411 and the third wavelength selection switch WS413. The first optical splitter SP411 is used to receive the synthesized optical signal Sig51 from the second output terminal 413 of the multiplexer 412 and transmit the first side transmission optical signal Ls51 to the first optical signal amplifier ED411 through the first transmission ring RING1.

[0303] like Figure 4 As shown, in terms of structure, the first optical signal amplifier ED411 is located on the first transmission ring RING1 and is coupled to the first optical splitter SP411 and the second optical splitter SP412 of another optical plug-in subsystem 400 in the same group. The first optical signal amplifier ED411 is used to receive the first side transmission optical signal Ls51 from the first optical splitter SP411, amplify the first side transmission optical signal Ls51, and output the amplified first side transmission optical signal Ls51' to the first transmission module 410 of another optical plug-in subsystem 400 in the same group. In some embodiments, the first optical signal amplifier ED411 can be implemented by an erbium-doped fiber amplifier.

[0304] like Figure 4 As shown, in terms of structure, the second optical splitter SP412 is located on the first transmission ring RING1 and is coupled to the first wavelength selective switch WS411, the third wavelength selective switch WS413 and the first optical signal amplifier ED411 of another optical plug-in subsystem 400 in the same group. The second optical splitter SP412 is used to receive and amplify the first lateral transmission optical signal Ls51' from the first transmission module 410 of another optical plug-in subsystem 400 in the same group, replicate and amplify the first lateral transmission optical signal Ls51' into a first downlink transmission optical signal Ds51 and a second lateral transmission optical signal Ls52, transmit the first downlink transmission optical signal Ds51 to the first wavelength selective switch WS411, and transmit the second lateral transmission optical signal Ls52 to the third wavelength selective switch WS413 through the first transmission ring RING1.

[0305] In detail, the second optical splitter SP412 is a 1x2 (one input port and two output ports) optical splitter, which replicates the second side-transmitted optical signal Ls32' and splits it into two light beams. When the second optical splitter SP412 replicates and optically amplifies the first side-transmitted optical signal Ls51', the second optical splitter SP412 transmits one light beam with a higher intensity to the first wavelength selective switch WS411, and transmits the other light beam with a lower intensity to the third wavelength selective switch WS413. Figure 4 In the embodiment of FIG. 4 , one of the two light beams continues to be transmitted westward to other light extraction subsystems 400 in the same group, and the other of the two light beams is transmitted downward to the optical receiving module (i.e., the demultiplexer 416). However, the present disclosure does not limit the transmission direction to the west. In practical applications, the transmission direction can be adjusted according to the network structure.

[0306] like Figure 4 As shown, in terms of structure, the first wavelength selective switch WS411 is coupled to the second optical splitter SP412 and the third optical splitter SP413. The first wavelength selective switch WS411 is used to receive the first downstream transmission optical signal Ds51 from the second optical splitter SP412 and output the second downstream transmission optical signal Ds52 to the third optical splitter SP413.

[0307] In detail, the first wavelength selective switch WS411 is a 1x1 (one input port and one output port) wavelength selective switch, which allows signals with specific wavelengths to pass through.

[0308] like Figure 4 As shown, the second wavelength selective switch WS412 is coupled to the second optical signal amplifier ED412 and the optical switching connection subsystem 400a. The second wavelength selective switch WS412 is used to receive the third downstream transmission optical signal Ds53 from the optical switching connection subsystem 400a and output the fourth downstream transmission optical signal Ds54 to the second optical signal amplifier ED412.

[0309] In detail, the second WSS WS412 is a 1x1 (one input port and one output port) WSS that allows signals with specific wavelengths to pass through.

[0310] like Figure 4As shown, in terms of structure, the second optical signal amplifier ED412 is coupled to the second wavelength selective switch WS412 and the third optical splitter SP413. The second optical signal amplifier ED412 is used to receive the fourth downlink transmission optical signal Ds54 from the second wavelength selective switch WS412, amplify the fourth downlink transmission optical signal Ds54, and output the amplified fourth downlink transmission optical signal Ds54' to the third optical splitter SP413. In some embodiments, the second optical signal amplifier ED412 can be implemented by an erbium-doped fiber amplifier.

[0311] like Figure 4 As shown, in terms of structure, the third optical splitter SP413 is coupled to the first wavelength selective switch WS411, the second optical signal amplifier ED412 and the demultiplexer 416. The third optical splitter SP413 is used to receive the second downstream transmission optical signal Ds52 from the first wavelength selective switch WS411, receive the amplified fourth downstream transmission optical signal Ds54' from the second optical signal amplifier ED412, integrate the second downstream transmission optical signal Ds52 and the amplified fourth downstream transmission optical signal Ds54' into the fifth downstream transmission optical signal Ds55 and the sixth downstream transmission optical signal Ds56, and transmit the fifth downstream transmission optical signal Ds55 and the sixth downstream transmission optical signal Ds56 to the demultiplexer 416.

[0312] In detail, the third optical splitter SP413 is a 2x2 (two input ends and two output ends) optical splitter. One of the two input ends is used to receive the second downstream transmission optical signal Ds52 from the first wavelength selection switch WS411, and the other of the two input ends is used to receive the amplified fourth downstream transmission optical signal Ds54' from the second optical signal amplifier ED412. One of the two output ends is used to output the fifth downstream transmission optical signal Ds55, and the other of the two output ends is used to output the sixth downstream transmission optical signal Ds56.

[0313] like Figure 4 As shown, in terms of structure, the demultiplexer 416 is coupled to the third optical splitter SP413 and connected to the top switch ToR. The demultiplexer 416 is used to receive the fifth downlink transmission optical signal Ds55 and the sixth downlink transmission optical signal Ds56 from the third optical splitter SP413, demultiplex the fifth downlink transmission optical signal Ds55 and the sixth downlink transmission optical signal Ds56 into a plurality of downlink optical signals DL1-DL8, and transmit the downlink optical signals DL1-DL8 to the top switch ToR.

[0314] like Figure 4As shown, in terms of structure, the third wavelength selective switch WS413 is located on the first transmission ring RING1 and coupled to the second optical splitter SP412 and the first optical splitter SP411. The third wavelength selective switch WS413 is used to receive the second side transmission optical signal Ls52 from the second optical splitter SP412 and output the third side transmission optical signal Ls53 to the first optical splitter SP411.

[0315] In detail, the third wavelength selective switch WS413 is a 1x1 (one input port and one output port) wavelength selective switch, which allows signals with specific wavelengths to pass through.

[0316] In addition, in some embodiments, the first optical splitter SP411 is further used to receive the third side transmission optical signal Ls53 from the third wavelength selective switch WS413, replicate the third side transmission optical signal Ls53 into a fourth side transmission optical signal Ls54, and transmit the fourth side transmission optical signal Ls54 through the first transmission ring RING1.

[0317] In detail, the first optical splitter SP411 is a 2x1 (two input ends and one output end) optical splitter. One of its two input ends is used to receive the synthesized optical signal Sig51 from the second output end 413, and the other of the two input ends is used to receive the third side-transmitted optical signal Ls53 from the third wavelength selective switch WS413. The output end of the first optical splitter SP411 is used to output the first side-transmitted optical signal Ls51 or the fourth side-transmitted optical signal Ls54. When the first optical splitter SP411 replicates and splits the synthesized optical signal Sig51, the first optical splitter SP411 combines the two input signals (i.e., the synthesized optical signal Sig51 and the third side-transmitted optical signal Ls53) with the same weight to generate an output light beam.

[0318] The second side-transmitted optical signal Ls52 passes through the 1x1 third wavelength selection switch WS413, and the third wavelength selection switch WS413 selects the signal with a specific wavelength in the second side-transmitted optical signal Ls52 as the third side-transmitted optical signal Ls53. Then, the fourth side-transmitted optical signal Ls54 is copied and split by the first optical splitter SP411, and continues to be transmitted westward to another optical plug-in subsystem 400 in the same optical node group. However, the present disclosure does not limit the transmission direction to the west. In practical applications, the transmission direction can be adjusted according to the network structure.

[0319] The following describes the connection relationship between the first transmission module and the second transmission module of the optical plug-in subsystem in the same group. For the sake of simplicity, the optical plug-in subsystem 200a-200e is used as an example. However, Figure 3 The optical plug-in subsystem 300 or Figure 4The light plug-in subsystem 400 in FIG. 4 may have similar connections. Figure 5 . Figure 5 FIG. 2 is a connection diagram of the first transmission module 210 and the second transmission module 220 of the optical plug-in subsystems 200 a - 200 e in the same group according to some embodiments of the present disclosure.

[0320] It should be noted that if Figure 5 As shown, in some embodiments, the first transmission module 210 and the second transmission module 220 of the optical plug-in subsystem 200a-200e transmit the side transmission optical signals Ls11, Ls12, Ls12', Ls13, Ls14, Ls21, Ls22, Ls22', Ls23 and Ls24 through the first transmission ring RING1 and the second transmission ring RING2 respectively. The optical transmission directions of the first transmission ring RING1 and the second transmission ring RING2 are opposite. For example, each first transmission module 210 transmits a signal to the west (i.e., in a clockwise direction) through the first transmission ring RING1, and each second transmission module 220 transmits a signal to the east (i.e., in a counterclockwise direction) through the second transmission ring RING2. However, the present disclosure is not limited to such a transmission direction. In other embodiments, the first transmission ring RING1 and the second transmission ring RING2 may transmit optical signals Ls11, Ls12, Ls12', Ls13, Ls14, Ls21, Ls22, Ls22', Ls23 and Ls24 in the same direction.

[0321] In addition, if Figure 5 As shown, the first transmission modules 210 of the optical plug-in subsystems 200a-200e are respectively coupled to the optical switching connection subsystem 400a (ie, Figure 5 The second transmission modules 220 of the optical plug-in subsystems 200a-200e are respectively coupled to the optical switching connection subsystem 400e (ie, the optical switching connection subsystem 400a) adjacent to the optical switching connection subsystem 400a through the corresponding second longitudinal ends 221. Figure 5 dashed arrow in the figure).

[0322] Please refer to Figures 2 to 4. The first transmission modules 210, 310, 410 and the second transmission modules 220, 320, 420 all include band multiplexers (Band MUX), namely multiplexers 212, 222, 312, 322, 412 and 422, and each band multiplexer corresponds to a specific wavelength group. Each band multiplexer integrates the optical signals received from the input end into a synthetic optical signal, and transmits the synthetic optical signal to the switching submodule of the optical plug-in subsystem through an optical fiber. Each input end of the multiplexer 212, 222 is connected to the transmission end of the different optical wave density wavelength division multiplexing optical transceiver module on the upper connection end of the top-mounted switch ToR in the cabinet by an optical fiber, and the transmission end corresponds to the wavelength group used by the corresponding input end. In detail, the band multiplexer includes eight input ends, and each input end can receive five wavelengths (i.e., a group of wavelength groups). Therefore, a band multiplexer can receive a total of forty wavelengths.

[0323] The first transmission modules 210, 310, 410 and the second transmission modules 220, 320, 420 all include a band demultiplexer (Band DEMUX), namely, demultiplexers 216, 226, 316, 326, 416 and 426. The band demultiplexer receives signals with various wavelengths and filters these signals to allow only signals with specific wavelengths to enter the corresponding drop-port. The specific wavelength must correspond to a specific wavelength group. Assuming that the intelligent defined optical tunnel system uses forty wavelengths (which can be arranged from small to large as λ1 to λ40), and each wavelength group includes eight wavelengths, each of the first transmission module and the second transmission module includes eight drop-ports. Each band demultiplexer selects eight signals with different wavelengths from the forty wavelengths (a band demultiplexer can only receive a maximum of forty wavelengths) according to a wavelength configuration and enters eight drop-ports respectively, wherein each drop-port corresponds to a wavelength group and can only receive one wavelength signal at a time. In one embodiment, the wavelength configuration of the frequency band demultiplexer may be as shown in Table 1 below:

[0324] Lower end Group1 Group2 Group3 Group4 Group5 1 λ1 λ2 λ3 λ4 λ5 2 λ6 λ7 λ8 λ9 λ10 3 λ11 λ12 λ13 λ14 λ15 4 λ16 λ17 λ18 λ19 λ20 5 λ21 λ22 λ23 λ24 λ25 6 λ26 λ27 λ28 λ29 λ30 7 λ31 λ32 λ33 λ34 λ35 8 λ36 λ37 λ38 λ39 λ40

[0325] Table 1

[0326] As shown in Table 1, when the band demultiplexer receives an optical signal, the first wavelength in each wavelength group (i.e., λ1, λ2, λ3, λ4, and λ5) enters the first drop-down end of the band demultiplexer, and the second wavelength in each wavelength group (i.e., λ6, λ7, λ8, λ9, and λ10) enters the second drop-down end of the band demultiplexer, and so on.

[0327] Each downlink end is connected to the transmission end of the different optical wave density wavelength division multiplexing optical transceiver module on the upper connection end of the top switch ToR in the cabinet by optical fiber, and the transmission end corresponds to the wavelength group used by the corresponding input end.

[0328] The following paragraphs will describe the network architecture design for interconnecting the optical plug-in subsystems 200a-200e to form a group P1. Figure 5 .like Figure 5 As shown, the optical plug-in subsystems 200a-200e are connected in series with optical fibers to form a group P1. As mentioned above, the number of optical plug-in subsystems 200a-200e that can be connected in series in a group depends on the number of wavelengths configured by each independent first transmission module 210 and second transmission module 220 and the total number of wavelength types supported by the intelligent optical tunnel network system 100. The first transmission module 210 and the second transmission module 220 in each optical plug-in subsystem 200a-200e are connected in series with the corresponding first transmission module 210 and the second transmission module 220 in the adjacent optical plug-in subsystems 200a-200e to form a ring network. Therefore, a group will include a plurality of independent ring networks.

[0329] The wavelengths of the frequency bands used by the transmission modules (such as the first transmission module 210) on the same transmission ring (such as the first transmission ring RING1) are not repeated, and are arranged in a counterclockwise direction from small to large according to their wavelength frequencies. In addition, since the transmission rings are independent of each other, the same wavelength can be reused on different rings. In other words, in some embodiments, the types and numbers of wavelengths used on the first transmission ring RING1 and the second transmission ring RING2 are the same.

[0330] The following describes the design of a multiplexer in an intelligently defined optical tunnel network system. In some embodiments, the band multiplexers 212, 222, 312, 322, 412, and 422 all include M input ports, each of which is used to receive an uploaded optical signal, wherein one uploaded optical signal corresponds to a group of N designated wavelengths, and a group of N designated wavelengths is selected from M*N different wavelengths. M and N are both positive integers. Therefore, each band multiplexer is used to receive an uploaded optical signal having N designated wavelengths, and the N designated wavelengths are selected from M*N different wavelengths. A band multiplexer includes eight input ports (i.e., M is eight), each of which is used to receive a wavelength group, and a wavelength group includes five wavelengths (i.e., N is five), so the band multiplexer can receive optical signals having forty different wavelengths.

[0331] Since the frequency band multiplexer can be used to receive a wide variety of wavelengths, the same frequency band multiplexer can be used in all first and second transmission modules of the intelligent defined optical tunnel network system. Figure 1Although the frequency band multiplexers used in the optical plugging subsystems 200a to 200e are used to receive optical signals of different wavelength groups, they are the same in design and structure. For example, in the optical plugging subsystem 200a, the multiplexer 212 is used to receive signals with wavelengths λ1, λ6, λ11, λ16, λ21, λ26, λ31, and λ36 (i.e., wavelengths included in wavelength group Group1), and the multiplexer 222 is used to receive signals with wavelengths λ2, λ7, λ12, λ17, λ22, λ27, λ32, and λ37 (i.e., wavelengths included in wavelength group Group2). In the optical plug-in subsystem 200b, the multiplexer 212 is used to receive signals with wavelengths λ2, λ7, λ12, λ17, λ22, λ27, λ32, λ37 (i.e., wavelengths included in wavelength group Group2), and the multiplexer 222 is used to receive signals with wavelengths λ3, λ8, λ13, λ18, λ23, λ28, λ33, λ38 (i.e., wavelengths included in wavelength group Group3). And so on. Therefore, although the band multiplexers are used to receive signals of different wavelength groups, their designs are the same. From this point of view, the band multiplexers of the present disclosure are universal.

[0332] The following describes the design of multiplexers in the present disclosure. Multiplexers 212, 222, and 412 are used as examples. Other multiplexers have similar designs. Figure 2 and Fig. 6A . Fig. 6A FIG. 2 is a schematic diagram of a multiplexer 212 according to some embodiments of the present disclosure. Fig. 6A As shown, the multiplexer 212 includes eight input terminals AP211-AP218 and a splitter BMSP1. Assuming that the multiplexer 212 is used to receive the signal in the wavelength group Group1 in Table 1, the input terminal AP211 is used to receive the signal with a wavelength of λ1, the input terminal AP212 is used to receive the signal with a wavelength of λ6, the input terminal AP213 is used to receive the signal with a wavelength of λ11, and so on. Fig. 6A As shown, when the input terminals AP211-AP218 receive corresponding signals from the top switch ToR, the input terminals AP211-AP218 transmit the signals to the optical splitter BMSP1, and the optical splitter BMSP1 integrates the received signals into a synthetic optical signal Sig11. Figure 2 As shown, the multiplexer 212 transmits the combined optical signal Sig11 to the first optical signal amplifier ED211 of the optical plug-in subsystem 200 .

[0333] Please also refer to Figure 2 and Figure 6B . Figure 6B FIG. 2 is a schematic diagram of a multiplexer 222 according to some embodiments of the present disclosure. Figure 6B As shown, the multiplexer 222 includes eight input terminals AP221-AP228 and a splitter BMSP2. Assuming that the multiplexer 222 is used to receive the signal in the wavelength group Group2 in Table 1, the input terminal AP221 is used to receive the signal with a wavelength of λ2, the input terminal AP222 is used to receive the signal with a wavelength of λ7, the input terminal AP223 is used to receive the signal with a wavelength of λ12, and so on. Figure 6B As shown, when the input terminals AP221-AP228 receive corresponding signals from the top switch ToR, the input terminals AP221-AP228 transmit the signals to the optical splitter BMSP2, and the optical splitter BMSP2 integrates the received signals into a synthetic optical signal Sig21. Figure 2 As shown, the multiplexer 222 transmits the synthesized optical signal Sig21 to the first optical signal amplifier ED221 of the optical plug-in subsystem 200 .

[0334] Please also refer to Figure 4 and Figure 6C . Figure 6C FIG. 4 is a schematic diagram of a multiplexer 412 according to some embodiments of the present disclosure. Figure 6C As shown, the multiplexer 412 includes eight input ports AP411-AP418 and a splitter BMSP3. Assuming that the multiplexer 412 is used to receive the signal in the wavelength group Group1 in Table 1, the input port AP411 is used to receive the signal with a wavelength of λ1, the input port AP412 is used to receive the signal with a wavelength of λ6, the input port AP413 is used to receive the signal with a wavelength of λ11, and so on. Figure 6C As shown, when the input terminals AP411-AP418 receive corresponding signals from the top switch ToR, the input terminals AP411-AP418 transmit the signals to the optical splitter BMSP3, and the optical splitter BMSP3 integrates the received signals into a synthetic optical signal Sig51. Figure 4 As shown, the first output terminal 411 of the multiplexer 412 transmits the synthesized optical signal Sig51 to the first optical splitter SP411.

[0335] Although the present disclosure has been disclosed in the above-mentioned embodiments, it is not intended to limit the present disclosure. Any person skilled in the art may make various changes and modifications without departing from the concept and scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be determined by the claims.

Claims

1. An intelligently defined optical tunnel network system, comprising: A plurality of groups, each of the plurality of groups comprises a plurality of optical plugging subsystems, wherein each of the plurality of optical plugging subsystems comprises a first transmission module and a second transmission module, the plurality of first transmission modules of the plurality of optical plugging subsystems are connected to each other to form a first transmission ring, the plurality of second transmission modules of the plurality of optical plugging subsystems are connected to each other to form a second transmission ring, and each of the plurality of first transmission modules comprises; a multiplexer connected to the top switch, the multiplexer being used to receive a plurality of uplink optical signals from the top switch through a plurality of input ports and to integrate the plurality of uplink optical signals into a composite optical signal, wherein a first output port of the multiplexer is used to transmit the composite optical signal to the first optical switching connection subsystem through a first longitudinal port, and a second output port of the multiplexer is used to output the composite optical signal; A first optical splitter, located on the first transmission ring and coupled to the second output end of the multiplexer, the first optical splitter is used to receive the combined optical signal from the second output end of the multiplexer and transmit the first side transmission optical signal through the first transmission ring; as well as a first optical signal amplifier, located on the first transmission ring and coupled to the first optical splitter, the first optical signal amplifier being used to amplify the first side-transmitted optical signal and output the amplified first side-transmitted optical signal to the first transmission module of another optical plug-in subsystem in the same group, The first transmission module further comprises: a second optical splitter, located on the first transmission ring, for receiving and duplicating the amplified first side transmission optical signal into a first downlink transmission optical signal and a second side transmission optical signal, and transmitting the second side transmission optical signal through the first transmission ring, wherein the amplified first side transmission optical signal is received from the first transmission module of another optical plug-in subsystem in the same group; A first wavelength selective switch, coupled to the second optical splitter, the first wavelength selective switch is used to receive the first downlink transmission optical signal from the second optical splitter and output a second downlink transmission optical signal; A second wavelength selective switch, for receiving a third downstream transmission optical signal from the first optical switching connection subsystem and outputting a fourth downstream transmission optical signal; A second optical signal amplifier, coupled to the second wavelength selective switch, the second optical signal amplifier being used to amplify the fourth downlink transmission optical signal and output the amplified fourth downlink transmission optical signal; a third optical splitter coupled to the first wavelength selective switch and the second optical signal amplifier, the third optical splitter being used to receive the second downstream transmission optical signal from the first wavelength selective switch, receive the amplified fourth downstream transmission optical signal from the second optical signal amplifier, integrate the second downstream transmission optical signal and the amplified fourth downstream transmission optical signal into a fifth downstream transmission optical signal, and integrate the second downstream transmission optical signal and the amplified fourth downstream transmission optical signal into a sixth downstream transmission optical signal; and A demultiplexer is coupled to the third optical splitter and connected to the top switch, and is used for receiving and demultiplexing the fifth downlink transmission optical signal and the sixth downlink transmission optical signal into a plurality of downlink optical signals, and transmitting the plurality of downlink optical signals to the top switch.

2. The intelligent defined optical tunnel network system as described in claim 1, wherein each of the multiple first transmission modules of the multiple optical plug-in subsystems is coupled to the first optical switching connection subsystem through the first longitudinal end, and each of the multiple second transmission modules of the multiple optical plug-in subsystems is coupled to the second optical switching connection subsystem adjacent to the first optical switching connection subsystem through the second longitudinal end.

3. The intelligent defined optical tunnel network system as described in claim 1, wherein each of the multiple first transmission modules of the first group among the multiple groups is coupled to the first optical switching connection subsystem through the first longitudinal end, and each of the multiple second transmission modules of the second group among the multiple groups is coupled to the first optical switching connection subsystem through a second longitudinal end.

4. The intelligently defined optical tunnel network system as claimed in claim 1, wherein the first transmission module further comprises: The third wavelength selection switch is located on the first transmission ring and coupled to the second optical splitter. The third wavelength selection switch is used for receiving the second side transmission optical signal from the second optical splitter and outputting a third side transmission optical signal to the first optical splitter.

5. The intelligently defined optical tunnel network system as claimed in claim 4, wherein the first optical splitter is further configured to receive the third side-transmitted optical signal from the third wavelength selective switch and transmit a fourth side-transmitted optical signal through the first transmission ring.

6. The intelligently defined optical tunnel network system as described in claim 1, wherein the optical transmission direction of the multiple optical plug-in subsystems in the first transmission ring is opposite to the optical transmission direction of the multiple optical plug-in subsystems in the second transmission ring.

7. The intelligently defined optical tunnel network system as described in claim 1, wherein the multiplexer comprises M input ports, each of the multiple input ports is used to receive an uplink optical signal corresponding to a set of N specified wavelengths, the N specified wavelengths are selected from M*N different wavelengths, and M and N are positive integers.

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