Virtual circuit type optical switching network system and its optical switch

Abstract

To provide an optical virtual-circuit-switching network system and an optical switch having scalable bandwidth and sharable paths.SOLUTION: An optical virtual-circuit-switching network system includes a plurality of optical switches 2000 and a plurality of top-of-rack switches. Each optical switch 2000 includes an optical upload module 2010, an optical download module 2030, an optical transmission module 2020, and an optical fiber connection module 2040. The optical upload module 2010 receives multiple wavelength optical signals from the top-of-rack switches, selects a route and wavelength, and then transmits them to a vertically connected optical switch 2000 or a horizontally connected optical switch 2000 via the optical fiber connection module 2040. The optical download module 2030 receives the multiple wavelength optical signals from the vertically connected optical switch 2000 and the horizontally connected optical switch 2000, and selectively combines the multiple wavelength optical signals to transmit them to the top-of-rack switches.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a virtual circuit type optical switching network system and its optical switch, and particularly to a virtual circuit type optical switching network system that selects a path and a wavelength when outputting and inputting an optical signal.

Background Art

[0002] High-Performance Computing (HPC) refers to performing large-scale and complex data processing using a super high-performance computer system. HPC is widely applied in fields such as artificial intelligence (AI), machine learning (ML), large-scale natural language processing (such as ChatGPT), financial analysis, medical data analysis, and big data analysis. These systems require powerful computing capabilities and extremely high data transmission speeds. Current HPC systems are developing in the direction of higher performance, lower power consumption, and higher performance density, and adopting advanced interconnection technologies to ensure high-speed transmission and real-time processing of data between computing nodes. To meet these requirements, HPC systems rely on a data center network infrastructure, which needs to flexibly provide high bandwidth and ultra-low latency inter-server connections.

[0003] Known virtual circuit switching is a method of performing packet switching in the electrical domain. A path is established between a source and a destination, and packets are routed and exchanged. This path is a virtual circuit. In this circuit, a specific data flow is specified, and all packets are transmitted along a specific path. Thereby providing a stable connection to the destination user. The term "virtual" means that this path is not actually dedicated to that data flow, but is shared with other data flows.

[0004] However, conventional electrical-switched network architectures are unable to meet the demands of rapidly increasing data volumes and high-speed processing, and high-performance computing (HPC) systems face many challenges. Electrical-switched network architectures are connected by optical transceivers and optical fibers, requiring frequent optical-electrical-optical (O / E / O) signal conversion, which necessitates high power consumption for network switching equipment and photoelectric conversion, increasing costs. Furthermore, as data volumes and processing demands increase, electrical-switched infrastructure encounters bottlenecks in bandwidth expansion, and high end-to-end latency degrades overall system performance.

[0005] In view of the above circumstances, the present invention proposes a virtual circuit type optical switching network system and its optical switch that can solve the problems of high power consumption, high latency, and high cost that are faced by the prior art. [Overview of the Initiative]

[0006] The object of the present invention is to provide a virtual circuit type optical switching network system and its optical switches. The virtual circuit type optical switching network system includes a plurality of optical switches and a plurality of top-of-rack switches. Its features include the integration of amplifiers, spectrometers, couplers, and wavelength-selective switches within the optical switches, and the configuration of optical upload modules, optical transmission modules, optical download modules, and optical fiber connection modules. Multiple server racks have connected top switches and optical switches. Furthermore, interconnection between different server racks is enabled through horizontal optical network subsystems and vertical optical network subsystems formed by horizontally connected and vertically connected optical switches. Packet data received from a top switch is transmitted entirely in the optical domain and finally transmitted to other top switches. Furthermore, the upload and download of wavelength optical signals is performed through power amplification by amplifiers, signal copying and merging by spectrometers and couplers, and wavelength and path selection by a plurality of wavelength-selective switches. In the prior art, optical signals were not selected for wavelength and path before horizontal or vertical transmission, but were directly copied and transmitted to other optical switches. In contrast, the virtual circuit type optical switching network system of the present invention can precisely select the optical signal, its corresponding transmission port, and the wavelength of the optical signal before transmitting the optical signal to other optical switches. As a result, this system has high flexibility, ultra-low latency, ultra-high bandwidth, and high energy efficiency in the optical signal transmission process, enabling high-performance inter-rack data transmission.

[0007] To achieve the above objective, the present invention discloses an optical switch connected to a top switch, which transmits a plurality of wavelength optical signals with at least one vertically connected optical switch and at least one horizontally connected optical switch. The optical switch includes an optical upload module, an optical download module, an optical transmission module, and an optical fiber connection module. The optical fiber connection module connects with the optical upload module, the optical download module, and the optical transmission module to transmit the plurality of wavelength optical signals. The optical upload module receives the plurality of wavelength upload optical signals from the top switch, selects a path and wavelengths, and then transmits them to the optical fiber connection module. The optical download module receives the plurality of wavelength optical signals from the at least one vertically connected optical switch and the at least one horizontally connected optical switch, selectively merges the plurality of wavelength optical signals, and downloads them to the top switch. The optical transmission module and the optical fiber connection module transmit the plurality of wavelength optical signals horizontally or vertically.

[0008] In an embodiment of the present invention, the optical upload module includes a multiplexer, a first amplifier, a first spectrometer, a first vertical wavelength selector switch, and a first horizontal wavelength selector switch. The multiplexer receives the plurality of wavelength upload optical signals from the top switch and merges the plurality of wavelength upload optical signals to output a merged optical signal. The first amplifier receives the merged optical signal from the multiplexer and amplifies it. The first spectrometer receives the amplified merged optical signal from the first amplifier and copies it into two merged optical signals to generate a first vertical optical signal and a first horizontal optical signal. The first vertical wavelength selector switch receives the first vertical optical signal from the first spectrometer and outputs at least one first vertical output optical signal to the at least one vertical connection optical switch. The first horizontal wavelength selector switch receives the first horizontal optical signal from the first spectrometer and outputs at least one first horizontal output optical signal to the at least one horizontal connection optical switch.

[0009] In an embodiment of the present invention, the optical transmission module includes a second vertical wavelength selector switch, a second amplifier, a second horizontal wavelength selector switch, a third horizontal wavelength selector switch, a third amplifier, and a third vertical wavelength selector switch. The second vertical wavelength selector switch receives a plurality of wavelength-selection-awaiting vertical optical signals from the optical fiber connection module and outputs a first direction-converting combined optical signal. The second amplifier receives the first direction-converting combined optical signal from the second vertical wavelength selector switch and amplifies it. The second horizontal wavelength selector switch receives the amplified first direction-converting combined optical signal from the second amplifier and outputs at least one second horizontal output optical signal to the at least one horizontal connection optical switch. The third horizontal wavelength selector switch receives a plurality of wavelength-selection-awaiting horizontal optical signals from the optical fiber connection module and outputs a second direction-converting combined optical signal. The third amplifier receives the second direction-converting combined optical signal from the third horizontal wavelength selector switch and amplifies it. The third vertical wavelength selector switch receives the amplified second direction-converting combined optical signal from the third amplifier and outputs at least one second vertical output optical signal to the at least one vertical connection optical switch.

[0010] In an embodiment of the present invention, the optical download module includes a fourth vertical wavelength selector switch, a fourth horizontal wavelength selector switch, a first coupler, a fourth amplifier, and a demultiplexer. The fourth vertical wavelength selector switch receives the plurality of wavelength-selection-awaited vertical optical signals from the optical fiber connection module and outputs a first vertical combined optical signal. The fourth horizontal wavelength selector switch receives the plurality of wavelength-selection-awaited horizontal optical signals from the optical fiber connection module and outputs a first horizontal combined optical signal. The first coupler receives the first vertical combined optical signal and the first horizontal combined optical signal from the fourth vertical wavelength selector switch and the fourth horizontal wavelength selector switch, respectively, and couples them to generate a download output optical signal. The fourth amplifier receives the download output optical signal from the first coupler and amplifies it. The demultiplexer receives the amplified download output optical signal from the fourth amplifier and decomposes the amplified download output optical signal into a plurality of wavelength download optical signals.

[0011] In an embodiment of the present invention, the optical fiber connection module includes a plurality of second spectrometers and a plurality of third spectrometers. The plurality of second spectrometers receive at least one second vertical optical signal from at least one vertical connection optical switch, copy it, and output the plurality of wavelength-selection-awaited vertical optical signals to the second vertical wavelength selector switch and the fourth vertical wavelength selector switch. The plurality of third spectrometers receive at least one second horizontal optical signal from at least one horizontal connection optical switch, copy it, and output the plurality of wavelength-selection-awaited horizontal optical signals to the third horizontal wavelength selector switch and the fourth horizontal wavelength selector switch.

[0012] In embodiments of the present invention, the optical fiber connection module includes a set of vertical optical fiber connection networks and a set of horizontal optical fiber connection networks. The set of vertical optical fiber connection networks is connected to the first vertical wavelength selector switch, the third vertical wavelength selector switch, and the second spectrometer, and transmits the plurality of wavelength optical signals toward the at least one vertical connection optical switch. The set of horizontal optical fiber connection networks is connected to the first horizontal wavelength selector switch, the second horizontal wavelength selector switch, and the third spectrometer, and transmits the plurality of wavelength optical signals toward the at least one horizontal connection optical switch.

[0013] In an embodiment of the present invention, the top switch includes a plurality of dense wavelength division multiplexing transceivers connected to the corresponding optical switch, and the plurality of dense wavelength division multiplexing transceivers perform optical-electrical and electrical-optical signal conversion.

[0014] Furthermore, the present invention discloses a virtual circuit type optical switching network system including a plurality of optical switches and a plurality of top switches. The plurality of optical switches form a plurality of optical network subsystems by connecting a plurality of optical fibers and transmit a plurality of wavelength optical signals. The plurality of optical network subsystems include at least one horizontal optical network subsystem formed by a plurality of interconnected horizontal optical switches and at least one vertical optical network subsystem formed by a plurality of interconnected vertical optical switches. The plurality of optical switches include an optical upload module, an optical download module, an optical transmission module, and an optical fiber connection module. The optical fiber connection module connects to the optical upload module, the optical download module, and the optical transmission module to transmit the plurality of wavelength optical signals. The plurality of top switches include a plurality of dense wavelength division multiplexing transceivers connected to the corresponding plurality of optical switches. The optical upload module receives a plurality of wavelength upload optical signals from the corresponding top switches, selects a path and wavelength, and transmits them to the optical fiber connection module, which then transmits them via the optical fiber connection module to at least one of the vertical optical switches in the at least one vertical optical network subsystem or at least one of the horizontal optical switches in the at least one horizontal optical network subsystem. The optical download module receives the plurality of wavelength optical signals from at least one of the vertically connected optical switches and at least one of the horizontally connected optical switches, selectively merges the plurality of wavelength optical signals, and downloads them to the top switch. The optical transmission module and the optical fiber connection module transmit the plurality of wavelength optical signals horizontally or vertically. The plurality of top switches perform optical-to-electrical and electrical-to-optical signal conversions using the plurality of dense wavelength division multiplexing transceivers.

[0015] In an embodiment of the present invention, the virtual circuit type optical switching network system includes a plurality of servers, the servers are connected to the corresponding plurality of top switches, and data transmission is performed through the plurality of optical switches.

[0016] In an embodiment of the present invention, the optical upload module includes a multiplexer, a first amplifier, a first spectrometer, a first vertical wavelength selector switch, and a first horizontal wavelength selector switch. The multiplexer receives the plurality of wavelength upload optical signals from the top switch and merges the plurality of wavelength upload optical signals to output a merged optical signal. The first amplifier receives the merged optical signal from the multiplexer and amplifies it. The first spectrometer receives the amplified merged optical signal from the first amplifier and copies it into two merged optical signals to generate a first vertical optical signal and a first horizontal optical signal. The first vertical wavelength selector switch receives the first vertical optical signal from the first spectrometer and outputs at least one first vertical output optical signal to at least one of the vertical connection optical switches. The first horizontal wavelength selector switch receives the first horizontal optical signal from the first spectrometer and outputs at least one first horizontal output optical signal to at least one of the horizontal connection optical switches.

[0017] In an embodiment of the present invention, the optical transmission module includes a second vertical wavelength selector switch, a second amplifier, a second horizontal wavelength selector switch, a third horizontal wavelength selector switch, a third amplifier, and a third vertical wavelength selector switch. The second vertical wavelength selector switch receives a plurality of wavelength-selection pending vertical optical signals from the optical fiber connection module and outputs a first direction-converting combined optical signal. The second amplifier receives the first direction-converting combined optical signal from the second vertical wavelength selector switch and amplifies it. The second horizontal wavelength selector switch receives the amplified first direction-converting combined optical signal from the second amplifier and outputs at least one second horizontal output optical signal to at least one of the horizontal connection optical switches. The third horizontal wavelength selector switch receives a plurality of wavelength-selection pending horizontal optical signals from the optical fiber connection module and outputs a second direction-converting combined optical signal. The third amplifier receives the second direction-converting combined optical signal from the third horizontal wavelength selector switch and amplifies it. The third vertical wavelength selector switch receives the amplified second direction-converting combined optical signal from the third amplifier and outputs at least one second vertical output optical signal to at least one of the vertical connection optical switches.

[0018] In an embodiment of the present invention, the optical download module includes a fourth vertical wavelength selector switch, a fourth horizontal wavelength selector switch, a first coupler, a fourth amplifier, and a demultiplexer. The fourth vertical wavelength selector switch receives the plurality of wavelength-selection-awaited vertical optical signals from the optical fiber connection module and outputs a first vertical combined optical signal. The fourth horizontal wavelength selector switch receives the plurality of wavelength-selection-awaited horizontal optical signals from the optical fiber connection module and outputs a first horizontal combined optical signal. The first coupler receives the first vertical combined optical signal and the first horizontal combined optical signal from the fourth vertical wavelength selector switch and the fourth horizontal wavelength selector switch, respectively, and couples them to generate a download output optical signal. The fourth amplifier receives the download output optical signal from the first coupler and amplifies it. The demultiplexer receives the amplified download output optical signal from the fourth amplifier and decomposes the amplified download output optical signal into a plurality of wavelength download optical signals.

[0019] In an embodiment of the present invention, the optical fiber connection module includes a plurality of second spectrometers and a plurality of third spectrometers. The plurality of second spectrometers receive at least one second vertical optical signal from at least one of the vertical connection optical switches, copy it, and output the plurality of wavelength-selection-awaited vertical optical signals to the second vertical wavelength selector switch and the fourth vertical wavelength selector switch. The plurality of third spectrometers receive at least one second horizontal optical signal from at least one of the horizontal connection optical switches, copy it, and output the plurality of wavelength-selection-awaited horizontal optical signals to the third horizontal wavelength selector switch and the fourth horizontal wavelength selector switch.

[0020] In embodiments of the present invention, the optical fiber connection module includes a set of vertical optical fiber connection networks and a set of horizontal optical fiber connection networks. The set of vertical optical fiber connection networks is connected to the first vertical wavelength selector switch, the third vertical wavelength selector switch, and the second spectrometer, and transmits the plurality of wavelength optical signals toward at least one of the vertical connection optical switches. The set of horizontal optical fiber connection networks is connected to the first horizontal wavelength selector switch, the second horizontal wavelength selector switch, and the third spectrometer, and transmits the plurality of wavelength optical signals toward at least one of the horizontal connection optical switches.

[0021] In an embodiment of the present invention, the number of optical switches in the plurality of optical network subsystems is a first quantity, the number of optical network subsystems to which the plurality of optical switches are directly connected is a second quantity, and the total number of optical switches is equal to the first quantity raised to the power of the second quantity.

[0022] In an embodiment of the present invention, the plurality of optical fibers are ribbon fibers, and the plurality of optical switches of the at least one horizontal optical network subsystem and the plurality of optical switches of the at least one vertical optical network subsystem are interconnected in a full-mesh manner by ribbon fibers.

[0023] Those skilled in the art can understand other objects of the present invention, as well as the technical means and embodiments of the present invention, by referring to the drawings and the embodiments described below.

Brief Description of the Drawings

[0024] [Figure 1] Schematic diagram showing the virtual circuit type optical switching network system of the present invention [Figure 2] Schematic diagram showing the relationship between the horizontal optical network subsystem and the vertical optical network subsystem of the present invention [Figure 3] Schematic diagram showing the configuration of the optical switch of the present invention [Figure 4] Schematic diagram showing the circuit of the optical switch of the present invention

Embodiments for Carrying Out the Invention

[0025] Hereinafter, the content of the present invention will be described through examples. Note that the examples of the present invention show examples of embodiments and are not intended to be limited to the environments, applications, or specific aspects as described in the examples. Therefore, the description of the examples is for explaining the present invention, but does not limit the present invention. In the embodiments and the drawings, components not directly related to the present invention are omitted and not shown. In the drawings, the dimensional relationships of each element are for facilitating understanding and do not limit the actual dimensional ratios.

[0026] The explanation will be given with reference to Figures 1 to 4. Figure 1 is a schematic diagram showing the virtual circuit type optical switching network system 1000 of the present invention. Figure 2 is a schematic diagram showing the relationship between the horizontal optical network subsystem and the vertical optical network subsystem of the virtual circuit type optical switching network system of the present invention. Figures 3 and 4 are schematic diagrams showing the configuration and circuit of an optical switch 2000, respectively. The virtual circuit type optical switching network system 1000 includes a plurality of optical switches 2000 and a plurality of top switches 3000. The optical switches 2000 form a plurality of optical network subsystems 1010 by connecting a plurality of optical fibers. The plurality of optical fibers connecting the plurality of optical switches are ribbon fibers. Each optical switch 2000 is connected to a corresponding top-of-rack switch 3000. The plurality of top switches 3000 are connected to a corresponding plurality of servers 4000. The plurality of top switches 3000 include a plurality of dense wavelength division multiplexing transceivers 3010 connected to the corresponding optical switches 2000. In other words, in the virtual circuit type optical switching network system 1000, the number of optical switches 2000 is the same as the number of corresponding servers 4000 and the number of corresponding top switches 3000, and the servers 4000 are interconnected by the arrangement of the optical switches 2000 and the multiple top switches 3000. Multiple wavelength optical signals are transmitted through the optical switches 2000.

[0027] Each of the multiple optical network subsystems 1010 includes at least one horizontal optical network subsystem 1020 and at least one vertical optical network subsystem 1030. Each horizontal optical network subsystem 1020 is formed by a plurality of interconnected horizontal optical switches 2000 and interconnected in a full mesh manner by a first ribbon fiber (not shown). On the other hand, each vertical optical network subsystem 1030 is formed by a plurality of interconnected vertical optical switches 2000 and interconnected in a full mesh manner by a second ribbon fiber (not shown). In other words, the optical switches 2000 are interconnected by the horizontal optical network subsystems 1020 and vertical optical network subsystems 1030, respectively, with other adjacent horizontal optical switches 2000 and other vertical optical switches 2000.

[0028] In this embodiment, the number of optical switches in multiple optical network subsystems is the first quantity. The number of optical network subsystems to which the multiple optical switches are directly connected is the second quantity. The total number of optical switches is equal to the first quantity raised to the power of the second quantity. In detail, the virtual circuit type optical switching network system 1000 is N S It is composed of 5 optical switches 2000. The first quantity (N) is the number of optical switches 2000 in the horizontal optical network subsystem 1020 and the vertical optical network subsystem 1030 of each optical network subsystem 1010, and the second quantity (S) is the number of horizontal optical network subsystems 1020 and the vertical optical network subsystem 1030 of the optical network subsystem 1010 to which the optical switches 2000 are directly connected. For example, as shown in Figure 1, in the virtual circuit type optical switching network system 1000 of the present invention, each optical switch 2000 is directly connected to the horizontal optical network subsystem 1020 and the vertical optical network subsystem 1030 (i.e., S=2). The horizontal optical network subsystem 1020 and the vertical optical network subsystem 1030 each have 5 optical switches 2000 (i.e., N=5). Therefore, the virtual circuit type optical switching network system 1000 of the present invention has 5 2= It is composed of 25 optical switches 2000. In other words, the virtual circuit type optical switching network system 1000 has five horizontal optical network subsystems 1020 and five vertical optical network subsystems 1030. The present invention may also increase the number (N) of optical switches 2000 included in the horizontal optical network subsystem 1020 and vertical optical network subsystem 1030 of each optical network subsystem 1010 and / or the total number (S) of horizontal optical network subsystems 1020 and vertical optical network subsystems 1030 of the optical network subsystem 1010 to which the optical switches 2000 are directly connected. This adjustment can expand the scale of the virtual circuit type optical switching network system 1000 to meet the requirements of various transmission conditions, and the number is not limited herein.

[0029] In this embodiment, the horizontal optical network subsystem 1020 and the vertical optical network subsystem 1030 each include the same number of optical switches 2000. In the virtual circuit type optical switching network system 1000, all optical switches 2000 are normally enabled, but some optical switches 2000 can be enabled according to actual usage requirements. Furthermore, if some optical switches 2000 fail and a particular transmission path becomes unavailable, the software control function of the software-defined network (SDN) can reroute packet data to other available paths.

[0030] This will be explained in detail with reference to Figures 1 and 2. Each optical switch 2000 is connected to two sets of optical switches 2000 via the horizontal optical network subsystem 1020 and the vertical optical network subsystem 1030. The optical switches 2000 are connected to four adjacent optical switches 2000 in a full-mesh configuration via the horizontal optical network subsystem 1020. On the other hand, the optical switches 2000 are connected to four adjacent optical switches 2000 in a full-mesh configuration via the vertical optical network subsystem 1030. When the virtual circuit type optical switching network system 1000 transmits packets, the optical switches 2000 transmit or receive data within the connected horizontal optical network subsystem 1020 or vertical optical network subsystem 1030. Another feature of the optical switches 2000 is that they can efficiently transmit data between the horizontal optical network subsystem 1020 and the vertical optical network subsystem 1030. In other words, the optical switch 2000 can not only transmit data within the optical network subsystem to which it belongs, but can also transmit data from the horizontal optical network subsystem 1020 to the vertical optical network subsystem 1030, or from the vertical optical network subsystem 1030 to the horizontal optical network subsystem 1020. Furthermore, Figure 2 shows only one set of horizontal optical network subsystems 1020 and one set of vertical optical network subsystems 1030 as an example. In the virtual circuit type optical switching network system 1000 of the present invention, all optical switches 2000 within each horizontal optical network subsystem 1020 and vertical optical network subsystem 1030 are interconnected. That is, the optical switches 2000 are bidirectionally connected and transmit bidirectionally.

[0031] Next, the configuration of the optical switch 2000 will be described in detail with reference to Figures 3 and 4. The optical switch 2000 includes an optical upload module 2010, an optical transmission module 2020, an optical download module 2030, and an optical fiber connection module 2040. The optical fiber connection module 2040 connects to the optical upload module 2010, the optical transmission module 2020, and the optical download module 2030, thereby transmitting multiple wavelength optical signals. When multiple wavelength optical signals are transmitted to the optical switch 2000 via the top switch 3000, they are transmitted via the optical upload module 2010 to another optical switch 2000 through the horizontal optical network subsystem 1020 or the vertical optical network subsystem 1030, and further transmitted to the top switch 3000 of another optical switch 2000 via the optical download module 2030 of that other optical switch 2000. Meanwhile, transmission continues from the optical transmission module 2020 of another optical switch 2000 to the next optical switch 2000 via the horizontal optical network subsystem 1020 or the vertical optical network subsystem 1030, and is transmitted to the corresponding top switch 3000 via the optical download module 2030.

[0032] More specifically, the optical upload module 2010 receives multiple wavelength upload optical signals from one of the top switches 3000, performs path selection and wavelength selection, and then transmits them to the optical fiber connection module 2040. Next, the multiple wavelength upload optical signals enter the optical switch 2000 from the top switch 3000, where they are converted into multiple wavelength optical signals and transmitted, and then transmitted through the optical fiber connection module 2040 to the corresponding optical download module 2030 of another optical switch 2000. The optical download module 2030 receives the multiple wavelength optical signals, selectively merges them, and downloads them to the top switch 3000 connected to the optical download module 2030 of another optical switch 2000. If transmission is to continue, the multiple wavelength optical signals are transmitted via the optical fiber connection module 2040 to the optical transmission module 2020 of the next optical switch 2000, and then transmitted from the optical download module 2030 of the optical switch 2000 to the corresponding top switch 3000. The optical transmission module 2020 and the optical fiber connection module 2040 transmit multiple wavelength optical signals horizontally or vertically. The multiple wavelength optical signals originate from at least one horizontal connection optical switch 2000 and at least one vertical connection optical switch 2000.

[0033] The optical upload module 2010 includes a multiplexer 2100, a first amplifier 2110, a first spectrometer 2120, a first vertical wavelength selector switch 2130, and a first horizontal wavelength selector switch 2140.

[0034] First, multiple wavelength upload optical signals are transmitted as local traffic from server 4000 to other server 4000. In the transmission path, multiple top switches 3000 connected to the corresponding server 4000 transmit electrical signals to multiple dense wavelength division multiplexing transceivers 3010. Next, the multiple dense wavelength division multiplexing transceivers 3010 convert the electrical signals into multiple wavelength upload optical signals and transmit the multiple wavelength upload optical signals to a multiplexer 2100. Each of the multiple wavelength upload optical signals has a different wavelength. Furthermore, after the multiple wavelength upload optical signals enter the optical switch 2000, no conversion between optical-electrical and electrical-optical signals is required throughout the entire signal processing process, thus avoiding energy loss during signal conversion.

[0035] Following the above, the multiplexer 2100 merges multiple wavelength upload optical signals and then outputs the merged optical signal. The first amplifier 2110 receives the merged optical signal from the multiplexer 2100 and amplifies it. The first spectrometer 2120 receives the amplified merged optical signal from the first amplifier 2110, copies it into two merged optical signals, and generates a first vertical optical signal and a first horizontal optical signal. The first vertical wavelength selector switch 2130 receives the first vertical optical signal from the first spectrometer 2120 and outputs at least one first vertical output optical signal to at least one vertical connection optical switch 2000. The first horizontal wavelength selector switch 2140 receives the first horizontal optical signal from the first spectrometer 2120 and outputs at least one first horizontal output optical signal to at least one horizontal connection optical switch 2000.

[0036] The first amplifier 2110 is an erbium-doped optical fiber amplifier (EDFA) that can increase the power of combined optical signals. Although optical signals are gradually attenuated or interfered with during optical fiber transmission, when using an EDFA, the power of the optical signal can be directly increased without going through optical-to-electrical signal conversion during the transmission process, and thus it can compensate for power attenuation during the horizontal or vertical optical signal upload process.

[0037] For example, the virtual circuit type optical switching network system 1000 of the present invention simultaneously transmits 16 or 32 multiple wavelength optical signals. Assuming a number of wavelength upload optical signals is 16, this represents 16 optical signals of different wavelengths. Each channel uses an optical signal of a different wavelength. More specifically, a spectrometer typically divides one optical signal into two or more optical signals and distributes the signal. A spectrometer typically has one input port and two or more output ports, distributing the input optical signal to different output ports according to a specific spectral ratio. In the present invention, the first spectrometer 2120 is a 1-input, 2-output spectrometer that copies the amplified combined optical signal into two identical combined optical signals, namely one first vertical optical signal and one first horizontal optical signal. The first vertical optical signal and the first horizontal optical signal each have 16 combined optical signals of different wavelengths. These optical signals enter the first vertical wavelength selection switch 2130 and the first horizontal wavelength selection switch 2140, respectively, for wavelength selection and path selection. As a result, the optical fiber connection module 2040 can efficiently and selectively transmit multiple wavelength optical signals to the vertical or horizontal optical switches 2000. In the first horizontal output optical signals after wavelength selection, two of the first horizontal optical signals are transmitted to the two horizontal optical switches 2000 to the east, and the other two first horizontal output optical signals are transmitted to the other two horizontal optical switches 2000 to the west. On the other hand, in the first vertical output optical signals after wavelength selection, two of the first vertical output optical signals are transmitted to the two vertical optical switches 2000 to the north, and the other two first vertical output optical signals are transmitted to the other two vertical optical switches 2000 to the south.

[0038] A wavelength selector switch selects the wavelength of the optical signal to be transmitted and dynamically arranges any wavelength. In this invention, as shown in Figure 4, the first vertical wavelength selector switch 2130 and the first horizontal wavelength selector switch 2140 are both 1x4 wavelength selector switches, each having one input optical fiber port and four output optical fiber ports. The input optical fiber port of the first vertical wavelength selector switch 2130 receives a first vertical optical signal with 16 different wavelengths. The first vertical wavelength selector switch 2130 selects at least one output optical fiber port from which the 16 wavelengths of the optical signal are transmitted vertically as a first vertical output optical signal. Similarly, the input optical fiber port of the first horizontal wavelength selector switch 2140 receives a first horizontal optical signal with 16 different wavelengths. The first horizontal wavelength selector switch 2140 selects at least one output optical fiber port from which the 16 wavelengths of the optical signal are transmitted horizontally as a first horizontal output optical signal. Furthermore, the first vertical optical signal and the first horizontal optical signal, each having 16 different wavelengths, are transmitted using one to four output optical fiber ports, as arbitrarily selected depending on the actual transmission conditions, but this is not limited to these ports.

[0039] Next, the optical transmission module 2020 will be described with reference to Figure 4. The optical transmission module 2020 includes a second vertical wavelength selector switch 2210, a second amplifier 2220, a second horizontal wavelength selector switch 2230, a third horizontal wavelength selector switch 2240, a third amplifier 2250, and a third vertical wavelength selector switch 2260.

[0040] For example, the second vertical wavelength selector switch 2210 receives multiple wavelength-selection-awaited vertical optical signals from the optical fiber connection module 2040 and outputs a first direction-converted combined optical signal. The second amplifier 2220 receives and amplifies the first direction-converted combined optical signal from the second vertical wavelength selector switch 2210. Finally, the second horizontal wavelength selector switch 2230 receives the amplified first direction-converted combined optical signal from the second amplifier 2220 and outputs at least one second horizontal output optical signal to at least one horizontal connection optical switch 2000. In this transmission path, multiple wavelength optical signals transmitted in the vertical optical network subsystem 1030 are converted to be transmitted in the horizontal optical network subsystem 1020. Similarly, the third horizontal wavelength selector switch 2240 receives multiple wavelength-selection-awaited horizontal optical signals from the optical fiber connection module 2040 and outputs a second direction-converted combined optical signal. The third amplifier 2250 receives and amplifies the second direction-converted combined optical signal from the third horizontal wavelength selector switch 2240. Finally, the third vertical wavelength selector switch 2260 receives the amplified second direction-converted combined optical signal from the third amplifier 2250 and outputs at least one second vertical output optical signal to at least one vertical connection optical switch 2000. In this transmission path, multiple wavelength optical signals transmitted in the horizontal optical network subsystem 1020 are converted to be transmitted in the vertical optical network subsystem 1030. Similarly, the second amplifier 2220 and the third amplifier 2250 are also erbium-doped optical fiber amplifiers, which enhance the power of the first direction-converted combined optical signal and the second direction-converted combined optical signal, respectively, thereby compensating for power attenuation during the transmission process of the optical signals when converting from horizontal to vertical or vertical to horizontal.

[0041] More specifically, as shown in Figure 4, the second vertical wavelength selector switch 2210 and the third horizontal wavelength selector switch 2240 are both 8x1 wavelength selector switches, each having eight input optical fiber ports and one output optical fiber port. The input optical fiber ports of the second vertical wavelength selector switch 2210 receive multiple wavelength selector pending vertical optical signals from the optical fiber connection module 2040. The input optical fiber ports of the third horizontal wavelength selector switch 2240 receive multiple wavelength selector pending horizontal optical signals from the optical fiber connection module 2040.

[0042] Furthermore, in this embodiment, both the second horizontal wavelength selector switch 2230 and the third vertical wavelength selector switch 2260 are 1x4 wavelength selector switches, each having one input optical fiber port and four output optical fiber ports. Similarly, the input optical fiber port of the second horizontal wavelength selector switch 2230 receives a first direction-converted combined optical signal having 16 different wavelengths. The second horizontal wavelength selector switch 2230 selects at least one output optical fiber port to perform horizontal transmission of the second horizontal output optical signal. Similarly, the input optical fiber port of the third vertical wavelength selector switch 2260 receives a second direction-converted combined optical signal having 16 different wavelengths. The third vertical wavelength selector switch 2260 selects at least one arbitrary output optical fiber port to perform vertical transmission of the second vertical output optical signal. The second horizontal wavelength selector switch 2230 and the third vertical wavelength selector switch 2260 also have wavelength selector and path selector functions, and transmit multiple wavelength optical signals through the optical fiber connection module 2040 to the vertical connection optical switch 2000 or the horizontal connection optical switch 2000 with high efficiency and multi-selectivity. Of the second horizontal output optical signals after wavelength selector, two of them are transmitted to the two horizontal connection optical switches 2000 to the east, and the other two are transmitted to the other two horizontal connection optical switches 2000 to the west. On the other hand, of the second vertical output optical signals after wavelength selector, two of them are transmitted to the two vertical connection optical switches 2000 to the north, and the other two are transmitted to the other two vertical connection optical switches 2000 to the south.

[0043] Next, the optical download module 2030 will be described with reference to Figure 4. The optical download module 2030 includes a fourth vertical wavelength selector switch 2310, a fourth horizontal wavelength selector switch 2320, a first coupler 2330, a fourth amplifier 2340, and a demultiplexer 2350.

[0044] For example, the fourth vertical wavelength selector switch 2310 receives multiple wavelength-selection-awaited vertical optical signals from the optical fiber connection module 2040 and outputs a first vertical combined optical signal. Simultaneously, the fourth horizontal wavelength selector switch 2320 receives multiple wavelength-selection-awaited horizontal optical signals from the optical fiber connection module 2040 and outputs a first horizontal combined optical signal. The first coupler 2330 is a two-input, one-output coupler. The first coupler 2330 receives the first vertical combined optical signal and the first horizontal combined optical signal from the fourth vertical wavelength selector switch 2310 and the fourth horizontal wavelength selector switch 2320, respectively, and couples them to generate a download output optical signal. Furthermore, the fourth amplifier 2340 receives the download output optical signal from the first coupler and amplifies it. Finally, the demultiplexer 2350 receives the amplified download output optical signal from the fourth amplifier 2340 and decomposes the amplified download output optical signal into multiple wavelength download optical signals. Furthermore, the multiple wavelength download optical signals are transmitted to multiple dense wavelength division multiplexing transceivers 3010. Next, multiple dense wavelength division multiplexer transceivers 3010 convert multiple wavelength download optical signals into electrical signals and transmit them to other multiple top switches 3000, and further to the corresponding connected servers 4000. This allows packet data to be transmitted between different servers 4000. Similarly, a fourth amplifier 2340 is an erbium-doped optical fiber amplifier, which enhances the power of the download output optical signal, thereby compensating for power attenuation during the optical signal download process.

[0045] More specifically, both the fourth vertical wavelength selector switch 2310 and the fourth horizontal wavelength selector switch 2320 are 8x1 wavelength selector switches, each having wavelength selector switches for eight input optical fiber ports and one output optical fiber port. The input optical fiber ports of the fourth vertical wavelength selector switch 2310 receive multiple wavelength selector pending vertical optical signals from the optical fiber connection module 2040. The input optical fiber ports of the fourth horizontal wavelength selector switch 2320 receive multiple wavelength selector pending horizontal optical signals from the optical fiber connection module 2040.

[0046] The details will be explained with reference to Figures 3 and 4. The optical fiber connection module 2040 includes a plurality of second spectrometers 2410, a plurality of third spectrometers 2420, a set of vertical optical fiber connection networks 2430, and a set of horizontal optical fiber connection networks 2440.

[0047] For example, multiple second spectrometers 2410 receive at least one second vertical optical signal from at least one vertical connection optical switch 2000, copy it, and output multiple wavelength-selection-awaited vertical optical signals to the second vertical wavelength selector switch 2210 and the fourth vertical wavelength selector switch 2310. Multiple third spectrometers 2420 receive at least one second horizontal optical signal from at least one horizontal connection optical switch 2000, copy it, and output multiple wavelength-selection-awaited horizontal optical signals to the third horizontal wavelength selector switch 2240 and the fourth horizontal wavelength selector switch 2320.

[0048] In this embodiment, there are eight second spectrometers 2410. Each of the second spectrometers 2410 is a 1-input, 2-output spectrometer. Specifically, the input signals for the four second spectrometers 2410 of the optical download module 2030 are at least one second vertical optical signal received from the north-side vertical connection optical switch 2000, and include a first vertical output optical signal and a second vertical output optical signal. Each second spectrometer 2410 outputs this signal by copying it into two identical wavelength-selectable waiting vertical optical signals. The input signals for the other four second spectrometers 2410 are at least one second vertical optical signal received from the south-side vertical connection optical switch 2000, and similarly include a first vertical output optical signal and a second vertical output optical signal. Each second spectrometer 2410 outputs this signal by copying it into two identical wavelength-selectable waiting vertical optical signals. Therefore, the multiple second spectrometers 2410 output a total of sixteen wavelength-selectable waiting vertical optical signals. In this case, the second vertical wavelength selector switch 2210 of the optical transmission module 2020 can selectively pass through specific optical wavelength signals of multiple vertical optical signals. This allows the vertically transmitted optical signals to be converted to horizontally transmitted optical signals via the optical transmission module 2020. Alternatively, the fourth vertical wavelength selector switch 2310 of the optical download module 2030 can selectively pass through specific optical wavelength signals of multiple vertical optical signals. This allows the vertically transmitted optical signals to be downloaded to the connected top switch 3000 via the optical download module 2030.

[0049] In this embodiment, there are eight third spectrometers 2420. Each of the multiple third spectrometers 2420 is a 1-input, 2-output spectrometer. Specifically, the input signals for the four third spectrometers 2420 of the optical download module 2030 are at least one second horizontal optical signal received from the eastern horizontal connection optical switch 2000, and include a first horizontal output optical signal and a second horizontal output optical signal. Each third spectrometer 2420 outputs this signal by copying it into two identical wavelength-selectable waiting horizontal optical signals. The input signals for the other four third spectrometers 2420 are at least one second horizontal optical signal received from the western vertical connection optical switch 2000, and similarly include a first horizontal output optical signal and a second horizontal output optical signal. Each third spectrometer 2420 outputs this signal by copying it into two identical wavelength-selectable waiting horizontal optical signals. Therefore, the multiple third spectrometers 2420 output a total of sixteen wavelength-selectable horizontal optical signals to the third horizontal wavelength selector switch 2240 of the optical transmission module 2020 and the fourth horizontal wavelength selector switch 2320 of the optical download module 2030. The wavelength selector switch 2240 can selectively pass through specific optical wavelength signals of multiple horizontal optical signals. Thereafter, the horizontally transmitted optical signals are converted to vertically transmitted optical signals via the optical transmission module 2020. The wavelength selector switch 2320 can also selectively pass through specific optical wavelength signals of multiple horizontal optical signals. Thereafter, the horizontally transmitted optical signals are downloaded to the connected top switch 3000 via the optical download module 2030.

[0050] For example, the vertical optical fiber connection network 2430 is connected to the first vertical wavelength selector switch 2130, the third vertical wavelength selector switch 2260, and the second spectrometer 2410, and transmits multiple wavelength optical signals toward at least one vertical optical switch 2000. The horizontal optical fiber connection network 2440 is connected to the first horizontal wavelength selector switch 2140, the second horizontal wavelength selector switch 2230, and the third spectrometer 2420, and transmits multiple wavelength optical signals toward at least one horizontal optical switch 2000. Furthermore, the vertical optical fiber connection network 2430 and the horizontal optical fiber connection network 2440 include multiple transverse optical fibers. The multiple transverse optical fibers are bundles of two 12-core ribbon fibers. The other vertical optical switches 2000 are fully meshed to form the vertical optical network subsystem 1030. The other horizontal optical switches 2000 are fully meshed to form the horizontal optical network subsystem 1020.

[0051] In the virtual circuit type optical switching network system 1000 shown in Figure 1, the horizontal optical network subsystem 1020 and vertical optical network subsystem 1030 shown in Figure 2, and the optical switch 2000 shown in Figure 4, the virtual circuit type optical switching network system 1000 is shown as an example, consisting of 25 optical switches 2000. The number of optical switches 2000 can also be adjusted according to the actual data transmission conditions. Similarly, the number of elements and the number of ports of each element of the optical switch 2000 may also be changed according to the number of optical switches 2000 included in the virtual circuit type optical switching network system 1000, and are not limited thereto.

[0052] On the other hand, the quantities of amplifiers, spectrometers, wavelength-selective switches, and ribbon fibers may also be adjusted according to the quantity of optical switches 2000 included in the virtual circuit type optical switching network system 1000, and are not limited thereto.

[0053] In summary, the virtual circuit type optical switching network system of the present invention is a distributed network architecture. Its main technical feature is that multiple server racks are interconnected by multiple optical switches, packet data is transmitted in the optical domain, and multiple optical-to-electrical and electrical-to-optical signal conversions are not required. Interconnection between different server racks is achieved by a horizontal optical network subsystem and a vertical optical network subsystem, each consisting of one top switch and one optical switch located in each server rack, and horizontally and vertically connected optical switches. Important elements such as amplifiers, spectrometers / couplers, and wavelength selector switches are integrated inside the optical switches. Optical upload modules, optical transmission modules, and optical download modules, each consisting of these elements, enable bidirectional transmission of wavelength optical signals between the horizontal optical network subsystem and the vertical optical network subsystem, thereby achieving efficient packet data transmission.

[0054] Furthermore, before the wavelength optical signal is transmitted from the optical upload module or optical transmission module to the optical fiber connection module for vertical or horizontal transmission, the wavelength optical signal can select the appropriate wavelength and path through a 1-input, 4-output wavelength selector switch according to the path requirements of the target optical switch. By utilizing this wavelength selector switch and the newly designed transmission path, the present invention can accurately select the transmission port of the wavelength optical signal and adjust the wavelength of the wavelength optical signal to be transmitted, thereby effectively eliminating signal interference and improving transmission performance.

[0055] The above-described embodiments illustrate embodiments of the present invention and describe the characteristic configuration of the present invention. The present invention is not limited to the above embodiments. Modifications or equivalent arrangements that can be easily made by those skilled in the art are also within the scope of the present invention. The scope of protection of the rights of the present invention shall be based on the claims. [Explanation of Symbols]

[0056] 1000 Virtual Circuit Type Optical Switching Network System 1010 Optical Network Subsystem 1020 Horizontal Optical Network Subsystem 1030 Vertical Optical Network Subsystem 2000 Optical switch 2010 Optical Upload Module 2020 Optical Transmission Module 2030 Optical Download Module 2040 Fiber Optic Connection Module 2100 Multiplexer 2110 First Amplifier 2120 1st spectrometer 2130 First Vertical Wavelength Selective Switch 2140 First horizontal wavelength selector switch 2210 Second Vertical Wavelength Selective Switch 2220 Second Amplifier 2230 Second Horizontal Wavelength Selector Switch 2240 Third Horizontal Wavelength Selector Switch 2250 Third Amplifier 2260 Third Vertical Wavelength Selective Switch 2310 Fourth Vertical Wavelength Selective Switch 2320 4th Horizontal Wavelength Selector Switch 2330 First coupler 2340 Amplifier No. 4 2350 Demultiplexer 2410 2nd spectrometer 2420 3rd spectrometer 2430 Vertical Fiber Optic Network 2440 Horizontal Fiber Optic Network 3000 Top Switch 3010 Dense Wavelength Division Multiplexing Transceiver 4000 Servers

Claims

1. An optical switch connected to a top switch, comprising at least one vertically connected optical switch and at least one horizontally connected optical switch, and an optical switch for transmitting multiple wavelength optical signals, Optical upload module and Optical download module and Optical transmission module and The optical upload module, the optical download module, and the optical transmission module are connected to an optical fiber connection module that transmits the plurality of wavelength optical signals, The optical upload module receives multiple wavelength upload optical signals from the top switch, selects a path and wavelength, and then transmits them to the optical fiber connection module. The optical download module receives the plurality of wavelength optical signals from the at least one vertically connected optical switch and the at least one horizontally connected optical switch, selectively merges the plurality of wavelength optical signals, and downloads them to the top switch. The optical transmission module and the optical fiber connection module are an optical switch that transmits the plurality of wavelength optical signals horizontally or vertically.

2. The aforementioned optical upload module is A multiplexer that receives the multiple wavelength upload optical signals from the top switch and merges the multiple wavelength upload optical signals to output a combined optical signal, A first amplifier that receives and amplifies the combined optical signal from the multiplexer, A first spectrometer receives the amplified combined optical signal from the first amplifier and copies it into two combined optical signals to generate a first vertical optical signal and a first horizontal optical signal. A first vertical wavelength selector switch that receives the first vertical optical signal from the first spectrometer and outputs at least one first vertical output optical signal to the at least one vertical connection optical switch, The optical switch according to claim 1, further comprising: a first horizontal wavelength selector switch that receives the first horizontal optical signal from the first spectrometer and outputs at least one first horizontal output optical signal to the at least one horizontal connection optical switch.

3. The optical transmission module is A second vertical wavelength selector switch receives multiple wavelength selector waiting vertical optical signals from the optical fiber connection module and outputs a first direction conversion combined optical signal, A second amplifier that receives and amplifies the first direction-converted combined optical signal from the second vertical wavelength selector switch, A second horizontal wavelength selector switch receives the first direction-changing combined optical signal amplified from the second amplifier and outputs at least one second horizontal output optical signal to the at least one horizontal connection optical switch, A third horizontal wavelength selector switch receives multiple wavelength selector waiting horizontal optical signals from the optical fiber connection module and outputs a second direction conversion combined optical signal, A third amplifier that receives and amplifies the second direction-converting combined optical signal from the third horizontal wavelength selector switch, The optical switch according to claim 2, further comprising: a third vertical wavelength selector switch that receives the amplified second direction-changing combined optical signal from the third amplifier and outputs at least one second vertical output optical signal to the at least one vertical connection optical switch.

4. The aforementioned optical download module is A fourth vertical wavelength selector switch receives the plurality of wavelength selector waiting vertical optical signals from the optical fiber connection module and outputs a first vertical combined optical signal, A fourth horizontal wavelength selector switch receives the plurality of wavelength selector waiting horizontal optical signals from the optical fiber connection module and outputs a first horizontal combined optical signal, A first coupler receives the first vertical combined optical signal and the first horizontal combined optical signal from the fourth vertical wavelength selector switch and the fourth horizontal wavelength selector switch, respectively, and couples them to generate a download output optical signal. A fourth amplifier that receives and amplifies the download output optical signal from the first coupler, The optical switch according to claim 3, further comprising a demultiplexer that receives the amplified download output optical signal from the fourth amplifier and decomposes the amplified download output optical signal into a plurality of wavelength download optical signals.

5. The optical fiber connection module includes a plurality of second spectrometers and a plurality of third spectrometers, The plurality of second spectrometers receive at least one second vertical optical signal from at least one vertical connection optical switch, copy it, and output the plurality of wavelength-selection-waiting vertical optical signals to the second vertical wavelength selector switch and the fourth vertical wavelength selector switch. The optical switch according to claim 4, characterized in that the plurality of third spectrometers receive at least one second horizontal optical signal from at least one horizontal connection optical switch, copy it, and output the plurality of wavelength-selection-waiting horizontal optical signals to the third horizontal wavelength selection switch and the fourth horizontal wavelength selection switch.

6. The optical fiber connection module includes a set of vertical optical fiber connection networks and a set of horizontal optical fiber connection networks. The set of vertical optical fiber connection networks is connected to the first vertical wavelength selector switch, the third vertical wavelength selector switch, and the second spectrometer, and transmits the plurality of wavelength optical signals toward at least one vertical connection optical switch. The optical switch according to claim 5, characterized in that the set of horizontal optical fiber connection networks is connected to the first horizontal wavelength selector switch, the second horizontal wavelength selector switch, and the third spectrometer, and transmits the plurality of wavelength optical signals toward at least one horizontal connection optical switch.

7. The optical switch according to claim 1, wherein the top switch includes a plurality of dense wavelength division multiplexing transceivers connected to the corresponding optical switch, and the plurality of dense wavelength division multiplexing transceivers perform optical-electrical and electrical-optical signal conversion.

8. A virtual circuit type optical switching network system including multiple optical switches and multiple top switches, The aforementioned multiple optical switches form multiple optical network subsystems by connecting multiple optical fibers and transmit multiple wavelength optical signals. The plurality of optical network subsystems include at least one horizontal optical network subsystem formed by a plurality of interconnected horizontal optical switches, and at least one vertical optical network subsystem formed by a plurality of interconnected vertical optical switches. The plurality of optical switches include an optical upload module, an optical download module, an optical transmission module, and an optical fiber connection module. The optical fiber connection module connects to the optical upload module, the optical download module, and the optical transmission module to transmit the plurality of wavelength optical signals. The plurality of top switches include a plurality of dense wavelength division multiplexing transceivers connected to the corresponding plurality of optical switches, The optical upload module receives multiple wavelength upload optical signals from the corresponding top switch, selects a path and wavelength, and transmits them to the optical fiber connection module, which then transmits them through the optical fiber connection module to at least one of the vertical connection optical switches of the at least one vertical optical network subsystem or at least one of the horizontal connection optical switches of the at least one horizontal optical network subsystem. The optical download module receives the plurality of wavelength optical signals from at least one of the vertically connected optical switches and at least one of the horizontally connected optical switches, selectively merges the plurality of wavelength optical signals, and downloads them to the top switch. The optical transmission module and the optical fiber connection module transmit the plurality of wavelength optical signals horizontally or vertically. The aforementioned multiple top switches constitute a virtual circuit type optical switching network system that performs optical-to-electrical and electrical-to-optical signal conversion using the aforementioned multiple dense wavelength division multiplex transceivers.

9. The virtual circuit type optical switching network system according to claim 8, characterized in that it includes a plurality of servers connected to the corresponding plurality of top switches and performing data transmission through the plurality of optical switches.

10. The aforementioned optical upload module is A multiplexer that receives the multiple wavelength upload optical signals from the top switch and merges the multiple wavelength upload optical signals to output a combined optical signal, A first amplifier that receives and amplifies the combined optical signal from the multiplexer, A first spectrometer receives the amplified combined optical signal from the first amplifier and copies it into two combined optical signals to generate a first vertical optical signal and a first horizontal optical signal. A first vertical wavelength selector switch that receives the first vertical optical signal from the first spectrometer and outputs at least one first vertical output optical signal to at least one of the vertical connection optical switches, The virtual circuit type optical switching network system according to claim 8, further comprising: a first horizontal wavelength selector switch that receives the first horizontal optical signal from the first spectrometer and outputs at least one first horizontal output optical signal to at least one of the horizontal connection optical switches.

11. The optical transmission module is A second vertical wavelength selector switch receives multiple wavelength selector waiting vertical optical signals from the optical fiber connection module and outputs a first direction conversion combined optical signal, A second amplifier that receives and amplifies the first direction-converted combined optical signal from the second vertical wavelength selector switch, A second horizontal wavelength selector switch receives the first direction-changing combined optical signal amplified from the second amplifier and outputs at least one second horizontal output optical signal to at least one of the horizontal connection optical switches, A third horizontal wavelength selector switch receives multiple wavelength selector waiting horizontal optical signals from the optical fiber connection module and outputs a second direction conversion combined optical signal, A third amplifier that receives and amplifies the second direction-converting combined optical signal from the third horizontal wavelength selector switch, The virtual circuit type optical switching network system according to claim 10, further comprising: a third vertical wavelength selector switch that receives the amplified second direction-changing combined optical signal from the third amplifier and outputs at least one second vertical output optical signal to at least one of the vertical connection optical switches.

12. The aforementioned optical download module is A fourth vertical wavelength selector switch receives the plurality of wavelength selector waiting vertical optical signals from the optical fiber connection module and outputs a first vertical combined optical signal, A fourth horizontal wavelength selector switch receives the plurality of wavelength selector waiting horizontal optical signals from the optical fiber connection module and outputs a first horizontal combined optical signal, A first coupler receives the first vertical combined optical signal and the first horizontal combined optical signal from the fourth vertical wavelength selector switch and the fourth horizontal wavelength selector switch, respectively, and couples them to generate a download output optical signal. A fourth amplifier that receives and amplifies the download output optical signal from the first coupler, The virtual circuit type optical switching network system according to claim 11, further comprising a demultiplexer that receives the amplified download output optical signal from the fourth amplifier and decomposes the amplified download output optical signal into a plurality of wavelength download optical signals.

13. The optical fiber connection module includes a plurality of second spectrometers and a plurality of third spectrometers, The plurality of second spectrometers receive at least one second vertical optical signal from at least one vertical connection optical switch, copy it, and output the plurality of wavelength-selection-waiting vertical optical signals to the second vertical wavelength selector switch and the fourth vertical wavelength selector switch. The virtual circuit type optical switching network system according to claim 12, characterized in that the plurality of third spectrometers receive at least one second horizontal optical signal from at least one horizontal connection optical switch, copy it, and output the plurality of wavelength-selection-waiting horizontal optical signals to the third horizontal wavelength selection switch and the fourth horizontal wavelength selection switch.

14. The optical fiber connection module includes a set of vertical optical fiber connection networks and a set of horizontal optical fiber connection networks. The set of vertical optical fiber connection networks is connected to the first vertical wavelength selector switch, the third vertical wavelength selector switch, and the second spectrometer, and transmits the plurality of wavelength optical signals toward at least one vertical connection optical switch. The virtual circuit type optical switching network system according to claim 13, characterized in that the set of horizontal optical fiber connection networks is connected to the first horizontal wavelength selector switch, the second horizontal wavelength selector switch, and the third spectrometer, and transmits the plurality of wavelength optical signals toward at least one horizontal connection optical switch.

15. The virtual circuit type optical switching network system according to claim 8, characterized in that the number of optical switches in the plurality of optical network subsystems is a first quantity, the number of optical network subsystems to which the plurality of optical switches are directly connected is a second quantity, and the total number of optical switches is equal to the first quantity raised to the power of the second quantity.

16. The aforementioned plurality of optical fibers are ribbon fibers, The virtual circuit type optical switching network system according to claim 8, characterized in that the plurality of optical switches of the at least one horizontal optical network subsystem and the plurality of optical switches of the at least one vertical optical network subsystem are interconnected in a full mesh manner by ribbon fibers.

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