Optical virtual-circuit-switching network system and optical switch thereof

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 an optical switch thereof, and more particularly to a virtual circuit type optical switching network system that selects a path and a wavelength when an optical signal is output or input. [Background technology]

[0002] High-performance computing (HPC) refers to the use of ultra-high-performance computer systems to process large-scale, complex data. HPC is widely applied in fields such as artificial intelligence (AI), machine learning (ML), large-scale natural language processing (e.g., ChatGPT), financial analysis, medical data analysis, and big data analysis. These systems require powerful computing power and extremely high data transmission rates. Current HPC systems are evolving toward higher performance, lower power consumption, and higher performance density, and employ advanced interconnection technologies to ensure high-speed data transmission and real-time processing between computing nodes. To meet these requirements, HPC systems rely on data center network infrastructure, which must flexibly provide high-bandwidth, ultra-low-latency interconnections between servers.

[0003] The well-known virtual circuit switching is a method of packet switching in the electrical domain. A path is established between the source and destination, along which packets are routed and switched. This path is a virtual circuit. This circuit designates a specific data flow, and all packets are transmitted along this specific path, 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, traditional electrical switching network architectures cannot meet the demands of the exponential growth in data volume and the demand for high-speed processing, and high-performance computing (HPC) systems face many challenges. Electrical switching network architectures are connected by optical transceivers and optical fibers, which require frequent optical-electrical-optical (O / E / O) signal conversion, which increases the power consumption of network switching equipment and optical-electrical conversion, resulting in increased costs. Furthermore, as data volume and processing demands increase, the electrical switching infrastructure encounters bottlenecks in expanding bandwidth, and high end-to-end latency also 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 delay, high cost, etc. that the conventional technology faces. Summary of the Invention

[0006] The present invention provides a virtual circuit-type optical switching network system and its optical switch. The virtual circuit-type optical switching network system includes multiple optical switches and multiple top-of-rack switches. Its unique feature is that the optical switches integrate amplifiers, spectrometers, couplers, and wavelength selective switches to form optical upload modules, optical transmission modules, optical download modules, and optical fiber connection modules. Multiple server racks are connected to the top-of-rack switches. Furthermore, horizontal and vertical optical switches form horizontal and vertical optical network subsystems, enabling interconnection between different server racks. Packet data received from a top-of-rack switch is transmitted entirely in the optical domain, and the data is finally transmitted to another top-of-rack switch. Furthermore, the uploading and downloading 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 multiple wavelength selective switches. In the prior art, optical signals were directly copied and transmitted to other optical switches without wavelength and path selection before horizontal or vertical transmission. In contrast, the virtual circuit-based optical switching network system of the present invention can accurately select the optical signal, the corresponding transmission port, and the wavelength of the optical signal before transmitting the optical signal to other optical switches, thereby realizing high-performance inter-rack data transmission with high flexibility, ultra-low latency, ultra-high bandwidth, and high energy efficiency in the optical signal transmission process.

[0007] To achieve the above object, the present invention discloses an optical switch connected to a top switch and transmitting multiple wavelength optical signals with at least one vertical connection optical switch and at least one horizontal connection 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 is connected to the optical upload module, the optical download module, and the optical transmission module to transmit the multiple wavelength optical signals. The optical upload module receives the multiple wavelength upload optical signals from the top switch, selects a route and wavelength, and transmits them to the optical fiber connection module. The optical download module receives the multiple wavelength optical signals from the at least one vertical connection optical switch and the at least one horizontal connection optical switch, selectively merges the multiple wavelength optical signals, and downloads them to the top switch. The optical transmission module and the optical fiber connection module transmit the multiple 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 splitter, a first vertical wavelength selective switch, and a first horizontal wavelength selective switch. The multiplexer receives the plurality of wavelength upload optical signals from the top switch and combines the plurality of wavelength upload optical signals to output a combined optical signal. The first amplifier receives the combined optical signal from the multiplexer and amplifies it. The first splitter 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. The first vertical wavelength selective switch receives the first vertical optical signal from the first splitter and outputs at least one first vertical output optical signal to the at least one vertical connection optical switch. The first horizontal wavelength selective switch receives the first horizontal optical signal from the first splitter 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 selective switch, a second amplifier, a second horizontal wavelength selective switch, a third horizontal wavelength selective switch, a third amplifier, and a third vertical wavelength selective switch. The second vertical wavelength selective switch receives a plurality of vertical optical signals to be wavelength selected from the optical fiber connection module and outputs a first direction-converted merged optical signal. The second amplifier receives and amplifies the first direction-converted merged optical signal from the second vertical wavelength selective switch. The second horizontal wavelength selective switch receives the amplified first direction-converted merged 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 selective switch receives a plurality of horizontal optical signals to be wavelength selected from the optical fiber connection module and outputs a second direction-converted merged optical signal. The third amplifier receives and amplifies the second direction-converted merged optical signal from the third horizontal wavelength selective switch. The third vertical wavelength selective switch receives the amplified second direction-converted merged 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 selective switch, a fourth horizontal wavelength selective switch, a first coupler, a fourth amplifier, and a demultiplexer. The fourth vertical wavelength selective switch receives the vertical optical signals to be wavelength selected from the optical fiber connection module and outputs a first vertical merged optical signal. The fourth horizontal wavelength selective switch receives the horizontal optical signals to be wavelength selected from the optical fiber connection module and outputs a first horizontal merged optical signal. The first coupler receives the first vertical merged optical signal and the first horizontal merged optical signal from the fourth vertical wavelength selective switch and the fourth horizontal wavelength selective 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 demultiplexers and a plurality of third demultiplexers. The plurality of second demultiplexers receive at least one second vertical optical signal from the at least one vertical connection optical switch, copy the plurality of vertical optical signals to be wavelength selected, and output the plurality of vertical optical signals to the second vertical wavelength selective switch and the fourth vertical wavelength selective switch. The plurality of third demultiplexers receive at least one second horizontal optical signal from the at least one horizontal connection optical switch, copy the plurality of horizontal optical signals to be wavelength selected, and output the plurality of horizontal optical signals to the third horizontal wavelength selective switch and the fourth horizontal wavelength selective switch.

[0012] In an embodiment 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 selective switch, the third vertical wavelength selective switch, and the second demultiplexer, 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 selective switch, the second horizontal wavelength selective switch, and the third demultiplexer, 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 switches, and the plurality of dense wavelength division multiplexing transceivers perform optical-to-electrical signal and electrical-to-optical signal conversion.

[0014] The present invention further discloses a virtual circuit-type optical switching network system including a plurality of optical switches and a plurality of top-of-the-line 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 interconnecting a plurality of horizontal connection optical switches and at least one vertical optical network subsystem formed by interconnecting a plurality of vertical connection 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 is connected 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-of-the-line switches include a plurality of dense wavelength division multiplexing transceivers connected to corresponding ones of the plurality of optical switches. The optical upload module receives the plurality of wavelength upload optical signals from the corresponding top-of-the-line switches, selects a route and wavelength, and transmits the selected wavelength upload optical signals to the optical fiber connection module, and then transmits the selected wavelength upload optical signals to at least one vertical connection optical switch of the at least one vertical optical network subsystem or at least one horizontal connection optical switch of the at least one horizontal optical network subsystem via the optical fiber connection module. The optical download module receives the multiple wavelength optical signals from at least one of the vertical connection optical switches and at least one of the horizontal connection optical switches, and selectively merges the multiple wavelength optical signals and downloads them to the top switch. The optical transmission module and the optical fiber connection module transmit the multiple wavelength optical signals horizontally or vertically. The multiple top switches perform optical-to-electrical signal and electrical-to-optical signal conversion using the multiple 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, each connected to a corresponding one of the plurality of top switches, and transmitting data 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 splitter, a first vertical wavelength selective switch, and a first horizontal wavelength selective switch. The multiplexer receives the plurality of wavelength upload optical signals from the top switch and combines the plurality of wavelength upload optical signals to output a combined optical signal. The first amplifier receives the combined optical signal from the multiplexer and amplifies it. The first splitter 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. The first vertical wavelength selective switch receives the first vertical optical signal from the first splitter and outputs at least one first vertical output optical signal to at least one of the vertical connection optical switches. The first horizontal wavelength selective switch receives the first horizontal optical signal from the first splitter 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 selective switch, a second amplifier, a second horizontal wavelength selective switch, a third horizontal wavelength selective switch, a third amplifier, and a third vertical wavelength selective switch. The second vertical wavelength selective switch receives a plurality of vertical optical signals to be wavelength selected from the optical fiber connection module and outputs a first direction-converted merged optical signal. The second amplifier receives and amplifies the first direction-converted merged optical signal from the second vertical wavelength selective switch. The second horizontal wavelength selective switch receives the amplified first direction-converted merged 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 selective switch receives a plurality of horizontal optical signals to be wavelength selected from the optical fiber connection module and outputs a second direction-converted merged optical signal. The third amplifier receives and amplifies the second direction-converted merged optical signal from the third horizontal wavelength selective switch. The third vertical wavelength selective switch receives the amplified second direction-converted merged 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 selective switch, a fourth horizontal wavelength selective switch, a first coupler, a fourth amplifier, and a demultiplexer. The fourth vertical wavelength selective switch receives the vertical optical signals to be wavelength selected from the optical fiber connection module and outputs a first vertical merged optical signal. The fourth horizontal wavelength selective switch receives the horizontal optical signals to be wavelength selected from the optical fiber connection module and outputs a first horizontal merged optical signal. The first coupler receives the first vertical merged optical signal and the first horizontal merged optical signal from the fourth vertical wavelength selective switch and the fourth horizontal wavelength selective 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 demultiplexers and a plurality of third demultiplexers. The plurality of second demultiplexers receive at least one second vertical optical signal from at least one of the vertical connection optical switches, copy the plurality of vertical optical signals to be wavelength selected, and output the plurality of vertical optical signals to the second vertical wavelength selective switch and the fourth vertical wavelength selective switch. The plurality of third demultiplexers receive at least one second horizontal optical signal from at least one of the horizontal connection optical switches, copy the plurality of horizontal optical signals to be wavelength selected, and output the plurality of horizontal optical signals to the third horizontal wavelength selective switch and the fourth horizontal wavelength selective switch.

[0020] In an embodiment 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 selective switch, the third vertical wavelength selective switch, and the second demultiplexer, 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 selective switch, the second horizontal wavelength selective switch, and the third demultiplexer, 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 quantity of the optical switches in the optical network subsystems is a first quantity, the quantity of the optical network subsystems directly connected by the optical switches is a second quantity, and the total quantity of the optical switches is equal to the first quantity multiplied by 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 each 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 explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a schematic diagram showing a virtual circuit type optical switching network system of the present invention. [Figure 2] FIG. 1 is a schematic diagram showing the relationship between the horizontal optical network subsystem and the vertical optical network subsystem of the present invention. [Figure 3] 1 is a schematic diagram showing the configuration of an optical switch according to the present invention; [Figure 4] Schematic diagram showing the circuit of the optical switch of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] The present invention will be described below through examples. Note that the examples of the present invention are merely examples of embodiments and are not intended to limit the present invention to the environments, applications, or specific aspects described in the examples. Therefore, the explanation of the examples is intended to explain the present invention, but does not limit the present invention. Note that in the embodiments and drawings, components not directly related to the present invention are omitted and not shown. In the drawings, the dimensional relationship between the elements is intended to facilitate understanding and is not intended to limit the actual dimensional ratios.

[0026] The following description will be given with reference to FIGS. 1 to 4. FIG. 1 is a schematic diagram showing a virtual circuit-type optical switching network system 1000 of the present invention. FIG. 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. FIGS. 3 and 4 are a schematic diagram showing the configuration of an optical switch 2000 and a schematic diagram showing a circuit, respectively. The virtual circuit-type optical switching network system 1000 includes a plurality of optical switches 2000 and a plurality of top-of-rack switches 3000. The optical switches 2000 form a plurality of optical network subsystems 1010 by connecting a plurality of optical fibers. The multiple optical fibers connecting the multiple optical switches are ribbon fibers. The optical switches 2000 are each connected to a corresponding top-of-rack switch 3000. The multiple top-of-rack switches 3000 are each connected to a corresponding plurality of servers 4000. The multiple top-of-rack switches 3000 include a plurality of dense wavelength division multiplexing transceivers 3010 connected to the corresponding optical switches 2000. That is, 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 multiple servers 4000 are connected to each other 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] The plurality of optical network subsystems 1010 include 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 connection optical switches 2000, which are interconnected in a full-mesh manner by a first ribbon fiber (not shown). Meanwhile, each vertical optical network subsystem 1030 is formed by a plurality of interconnected vertical connection optical switches 2000, which are interconnected in a full-mesh manner by a second ribbon fiber (not shown). In other words, an optical switch 2000 is interconnected with another adjacent horizontal connection optical switch 2000 and another adjacent vertical connection optical switch 2000 by the horizontal optical network subsystem 1020 and the vertical optical network subsystem 1030, respectively.

[0028] In this embodiment, the number of optical switches in the optical network subsystems is a first quantity. The number of optical network subsystems directly connected by the optical switches is a second quantity. The total number of optical switches is equal to the first quantity multiplied by the second quantity. In detail, the virtual circuit type optical switching network system 1000 has N S The virtual circuit-type optical switching network system 1000 of the present invention is configured by 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 vertical optical network subsystems 1030 of the optical network subsystem 1010 to which the optical switch 2000 is directly connected. For example, as shown in FIG. 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). Each of the horizontal optical network subsystem 1020 and the vertical optical network subsystem 1030 has five optical switches 2000 (i.e., N=5). Therefore, the virtual circuit-type optical switching network system 1000 of the present invention is configured by five 225 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. Furthermore, the present invention may increase the number (N) of optical switches 2000 included in the horizontal optical network subsystems 1020 and vertical optical network subsystems 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 makes it possible to expand the scale of the virtual circuit-type optical switching network system 1000 and respond to various transmission condition requirements, and the number is not limited here.

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

[0030] This will be described in detail with reference to Figures 1 and 2. Each optical switch 2000 is connected to two sets of optical switches 2000 through a horizontal optical network subsystem 1020 and a vertical optical network subsystem 1030. The optical switch 2000 is connected to four adjacent optical switches 2000 in a full-mesh manner by the horizontal optical network subsystem 1020. On the other hand, the optical switch 2000 is connected to four adjacent optical switches 2000 in a full-mesh manner by the vertical optical network subsystem 1030. When the virtual circuit-type optical switching network system 1000 transports packets, the optical switch 2000 transmits or receives data within the connected horizontal optical network subsystem 1020 or vertical optical network subsystem 1030. Another feature of the optical switch 2000 is that it can efficiently transmit data between the horizontal optical network subsystem 1020 and the vertical optical network subsystem 1030. That is, the optical switch 2000 can transmit data not only within the optical network subsystem to which it belongs, but also 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. Also, only one set of horizontal optical network subsystems 1020 and one set of vertical optical network subsystems 1030 are shown in FIG. 2 as an example. In the virtual circuit-type optical switching network system 1000 of the present invention, all the optical switches 2000 in each horizontal optical network subsystem 1020 and vertical optical network subsystem 1030 are interconnected. That is, the optical switch 2000 provides bidirectional connection and bidirectional transmission.

[0031] 3 and 4, the configuration of the optical switch 2000 will be described in detail. 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 the optical upload module 2010, the optical transmission module 2020, and the optical download module 2030, thereby transmitting optical signals of multiple wavelengths. When the optical signals of multiple wavelengths 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 then further transmitted to the top switch 3000 of the other optical switch 2000 via the optical download module 2030 of the other optical switch 2000. Meanwhile, transmission continues from the optical transmission module 2020 of another optical switch 2000 to the next optical switch 2000 through 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] Specifically, the optical upload module 2010 receives multiple wavelength upload optical signals from one of the top switches 3000, performs route selection and wavelength selection, and then transmits them to the optical fiber connection module 2040. The multiple wavelength upload optical signals then enter the optical switch 2000 from the top switch 3000, are converted into multiple wavelength optical signals, transmitted, and 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 the multiple wavelength optical signals, and downloads them to the top switch 3000 connected to the optical download module 2030 of another optical switch 2000. If it is selected to continue transmission, the multiple wavelength optical signals are transmitted to the optical transmission module 2020 of the next optical switch 2000 via the optical fiber connection module 2040, 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 are 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 demultiplexer 2120 , a first vertical wavelength selective switch 2130 , and a first horizontal wavelength selective switch 2140 .

[0034] First, multiple wavelength upload optical signals are transmitted from a server 4000 to another server 4000 as local traffic. Along the transmission path, electrical signals are sent from multiple top switches 3000 connected to the corresponding servers 4000 to multiple dense wavelength division multiplexing transceivers 3010. The multiple dense wavelength division multiplexing transceivers 3010 then convert the electrical signals into multiple wavelength upload optical signals and send the multiple wavelength upload optical signals to the multiplexer 2100. The multiple wavelength upload optical signals each have a different wavelength. After the multiple wavelength upload optical signals enter the optical switch 2000, no optical-electrical or electrical-optical conversion is required during the entire signal processing process, thereby avoiding energy loss during signal conversion.

[0035] Following the above, the multiplexer 2100 combines the multiple wavelength upload optical signals and outputs a combined optical signal. The first amplifier 2110 receives and amplifies the combined optical signal from the multiplexer 2100. The first demultiplexer 2120 receives the amplified combined optical signal from the first amplifier 2110 and copies it into two combined optical signals to generate a first vertical optical signal and a first horizontal optical signal. The first vertical wavelength selective switch 2130 receives the first vertical optical signal from the first demultiplexer 2120 and outputs at least one first vertical output optical signal to at least one vertical connection optical switch 2000. The first horizontal wavelength selective switch 2140 receives the first horizontal optical signal from the first demultiplexer 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 the merged optical signal. Optical signals are gradually attenuated or interfered with during optical fiber transmission. However, using an EDFA can directly increase the power of the optical signal during optical signal transmission without undergoing optical-electrical signal conversion, thereby compensating for power attenuation during the uploading of horizontal or vertical optical signals.

[0037] For example, the virtual circuit-type optical switching network system 1000 of the present invention simultaneously transmits 16 or 32 optical signals with multiple wavelengths. The number of wavelength upload optical signals is 16, representing optical signals with 16 different wavelengths. Each channel uses optical signals with different wavelengths. Specifically, a demultiplexer typically splits an optical signal into two or more optical signals for signal distribution. A demultiplexer typically has one input port and two or more output ports, and distributes the input optical signal to different output ports according to a specific split ratio. In the present invention, the first demultiplexer 2120 is a one-input, two-output demultiplexer that copies the amplified merged optical signal into two identical merged 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 contain optical signals with 16 different wavelengths. These optical signals enter the first vertical wavelength selective switch 2130 and the first horizontal wavelength selective switch 2140, respectively, for wavelength selection and routing. This allows the optical fiber connection module 2040 to transmit multiple wavelength optical signals to the vertical connection optical switches 2000 or the horizontal connection optical switches 2000 with high efficiency and multi-selectivity. Of the first horizontal output optical signals after wavelength selection, two of the first horizontal optical signals are transmitted to the two east horizontal connection optical switches 2000, and the other two first horizontal output optical signals are transmitted to the other two west horizontal connection optical switches 2000. On the other hand, of the first vertical output optical signals after wavelength selection, two of the first vertical output optical signals are transmitted to the two north vertical connection optical switches 2000, and the other two first vertical output optical signals are transmitted to the other two south vertical connection optical switches 2000.

[0038] The wavelength selective switch selects the wavelength of the optical signal to be transmitted and dynamically allocates any wavelength. In the present invention, as shown in FIG. 4, the first vertical wavelength selective switch 2130 and the first horizontal wavelength selective switch 2140 are both 1x4 wavelength selective switches, each having one input optical fiber port and four output optical fiber ports. The input optical fiber port of the first vertical wavelength selective switch 2130 receives first vertical optical signals having 16 different wavelengths. The first vertical wavelength selective switch 2130 selects at least one arbitrary output optical fiber port from the optical signals having 16 wavelengths for vertical transmission of the first vertical output optical signals. Similarly, the input optical fiber port of the first horizontal wavelength selective switch 2140 receives first horizontal optical signals having 16 different wavelengths. The first horizontal wavelength selective switch 2140 selects at least one arbitrary output optical fiber port from the optical signals having 16 wavelengths for horizontal transmission of the first horizontal output optical signals. In addition, the first vertical optical signal having 16 different wavelengths and the first horizontal optical signal having 16 different wavelengths are transmitted by arbitrarily selecting one to four output optical fiber ports according to the actual transmission situation, but this is not limited here.

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

[0040] For example, the second vertical wavelength selective switch 2210 receives multiple vertical optical signals awaiting wavelength selection from the optical fiber connection module 2040 and outputs a first direction-converted merged optical signal. The second amplifier 2220 receives and amplifies the first direction-converted merged optical signal from the second vertical wavelength selective switch 2210. Finally, the second horizontal wavelength selective switch 2230 receives the amplified first direction-converted merged 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. This transmission path converts multiple wavelength optical signals transmitted in the vertical optical network subsystem 1030 to those transmitted in the horizontal optical network subsystem 1020. Similarly, the third horizontal wavelength selective switch 2240 receives multiple horizontal optical signals awaiting wavelength selection from the optical fiber connection module 2040 and outputs a second direction-converted merged optical signal. The third amplifier 2250 receives and amplifies the second direction-converted merged optical signal from the third horizontal wavelength selective switch 2240. Finally, the third vertical wavelength selective switch 2260 receives the amplified second direction-converted merged 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. This transmission path converts the multiple wavelength optical signals transmitted in the horizontal optical network subsystem 1020 to those transmitted in the vertical optical network subsystem 1030. The second amplifier 2220 and the third amplifier 2250 are also erbium-doped optical fiber amplifiers, which boost the power of the first direction-converted merged optical signal and the second direction-converted merged optical signal, respectively, thereby compensating for power attenuation during the optical signal transmission process when converting from horizontal to vertical or from vertical to horizontal.

[0041] 4, the second vertical wavelength selective switch 2210 and the third horizontal wavelength selective switch 2240 are both 8×1 wavelength selective switches, each having eight input optical fiber ports and one output optical fiber port. The input optical fiber port of the second vertical wavelength selective switch 2210 receives a plurality of vertical optical signals to be selected from the optical fiber connection module 2040. The input optical fiber port of the third horizontal wavelength selective switch 2240 receives a plurality of horizontal optical signals to be selected from the optical fiber connection module 2040.

[0042] In this embodiment, the second horizontal wavelength selective switch 2230 and the third vertical wavelength selective switch 2260 are both 1x4 wavelength selective 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 selective switch 2230 receives a first direction-converted merged optical signal having 16 different wavelengths. The second horizontal wavelength selective switch 2230 selects at least one output optical fiber port for the optical signal having 16 wavelengths, resulting in horizontal transmission of the second horizontal output optical signal. Similarly, the input optical fiber port of the third vertical wavelength selective switch 2260 receives a second direction-converted merged optical signal having 16 different wavelengths. The third vertical wavelength selective switch 2260 selects at least one output optical fiber port for the optical signal having 16 wavelengths, resulting in vertical transmission of the second vertical output optical signal. The second horizontal wavelength selective switch 2230 and the third vertical wavelength selective switch 2260 also have wavelength selection and route selection functions, and transmit multiple wavelength optical signals to the vertical connection optical switches 2000 or the horizontal connection optical switches 2000 efficiently and multi-selectively through the optical fiber connection module 2040. Of the second horizontal output optical signals after wavelength selection, two of the second horizontal output optical signals are transmitted to the two east horizontal connection optical switches 2000, and the other two second horizontal output optical signals are transmitted to the other two west horizontal connection optical switches 2000. On the other hand, of the second vertical output optical signals after wavelength selection, two of the second vertical output optical signals are transmitted to the two north vertical connection optical switches 2000, and the other two second vertical output optical signals are transmitted to the other two south vertical connection optical switches 2000.

[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 selective switch 2310, a fourth horizontal wavelength selective switch 2320, a first coupler 2330, a fourth amplifier 2340, and a demultiplexer 2350.

[0044] For example, the fourth vertical wavelength selective switch 2310 receives multiple vertical optical signals to be wavelength-selected from the optical fiber connection module 2040 and outputs a first vertical merged optical signal. At the same time, the fourth horizontal wavelength selective switch 2320 receives multiple horizontal optical signals to be wavelength-selected from the optical fiber connection module 2040 and outputs a first horizontal merged optical signal. The first coupler 2330 is a two-input, one-output coupler. The first coupler 2330 receives the first vertical merged optical signal and the first horizontal merged optical signal from the fourth vertical wavelength selective switch 2310 and the fourth horizontal wavelength selective switch 2320, respectively, and couples them to generate a download output optical signal. The fourth amplifier 2340 further receives and amplifies the download output optical signal from the first coupler. The demultiplexer 2350 finally 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. The multiple wavelength download optical signals are then transmitted to multiple dense wavelength division multiplexing transceivers 3010. The dense wavelength division multiplexing transceivers 3010 then convert the wavelength download optical signals into electrical signals, which are then transmitted to other top switches 3000 and then to the corresponding connected servers 4000. In this way, packet data is transmitted between different servers 4000. The fourth amplifier 2340 is also an erbium-doped optical fiber amplifier, which amplifies the power of the download output optical signal, thereby compensating for power attenuation during the optical signal download process.

[0045] Specifically, the fourth vertical wavelength selective switch 2310 and the fourth horizontal wavelength selective switch 2320 are both 8x1 wavelength selective switches, each having eight input optical fiber ports and one output optical fiber port. The input optical fiber port of the fourth vertical wavelength selective switch 2310 receives a plurality of vertical optical signals to be selected from the optical fiber connection module 2040. The input optical fiber port of the fourth horizontal wavelength selective switch 2320 receives a plurality of horizontal optical signals to be selected from the optical fiber connection module 2040.

[0046] 3 and 4, the optical fiber connection module 2040 includes a plurality of second splitters 2410, a plurality of third splitters 2420, a set of vertical optical fiber connection networks 2430, and a set of horizontal optical fiber connection networks 2440.

[0047] For example, the plurality of second demultiplexers 2410 receive at least one second vertical optical signal from at least one vertical connection optical switch 2000, copy the signal, and output a plurality of vertical optical signals awaiting wavelength selection to the second vertical wavelength selective switch 2210 and the fourth vertical wavelength selective switch 2310. The plurality of third demultiplexers 2420 receive at least one second horizontal optical signal from at least one horizontal connection optical switch 2000, copy the signal, and output a plurality of horizontal optical signals awaiting wavelength selection to the third horizontal wavelength selective switch 2240 and the fourth horizontal wavelength selective switch 2320.

[0048] In this embodiment, there are eight second splitters 2410. Each of the second splitters 2410 is a one-input, two-output splitter. Specifically, the input signal of each of the four second splitters 2410 in the optical download module 2030 is at least one second vertical optical signal received from the north vertical connection optical switch 2000, including a first vertical output optical signal and a second vertical output optical signal. Each second splitter 2410 copies the input signal into two identical vertical optical signals to be wavelength-selected and outputs the two identical vertical optical signals. The input signal of each of the other four second splitters 2410 is at least one second vertical optical signal received from the south vertical connection optical switch 2000, including a first vertical output optical signal and a second vertical output optical signal. Each second splitter 2410 copies the input signal into two identical vertical optical signals to be wavelength-selected and outputs the two identical vertical optical signals. Therefore, the multiple second splitters 2410 output a total of sixteen vertical optical signals to be wavelength-selected. In this case, the second vertical wavelength selective switch 2210 of the optical transmission module 2020 can select and pass a specific optical wavelength signal of the plurality of vertical optical signals. As a result, the vertical transmission optical signal is converted into a horizontal transmission optical signal via the optical transmission module 2020. Alternatively, the fourth vertical wavelength selective switch 2310 of the optical download module 2030 can select and pass a specific optical wavelength signal of the plurality of vertical optical signals. As a result, the vertical transmission optical signal is downloaded to the connected top switch 3000 via the optical download module 2030.

[0049] In this embodiment, there are eight third splitters 2420. Each of the multiple third splitters 2420 is a one-input, two-output splitter. Specifically, the input signal of the four third splitters 2420 in the optical download module 2030 is at least one second horizontal optical signal received from the east-side horizontal connection optical switch 2000, including a first horizontal output optical signal and a second horizontal output optical signal. Each third splitter 2420 copies the input signal into two identical horizontal optical signals to be wavelength-selected and outputs them. The input signal of the other four third splitters 2420 is at least one second horizontal optical signal received from the west-side vertical connection optical switch 2000, including a first horizontal output optical signal and a second horizontal output optical signal. Each third splitter 2420 copies the input signal into two identical horizontal optical signals to be wavelength-selected and outputs them. Therefore, the multiple third demultiplexers 2420 output a total of 16 horizontal optical signals awaiting wavelength selection to the third horizontal wavelength selective switch 2240 of the optical transmission module 2020 and the fourth horizontal wavelength selective switch 2320 of the optical download module 2030. The wavelength selective switch 2240 can select and pass specific optical wavelength signals of the multiple horizontal optical signals. As a result, the horizontal transmission optical signals are converted into vertical transmission optical signals via the optical transmission module 2020. The wavelength selective switch 2320 can also select and pass specific optical wavelength signals of the multiple horizontal optical signals. As a result, the horizontal transmission 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 selective switch 2130, the third vertical wavelength selective switch 2260, and the second demultiplexer 2410, and transmits a plurality of wavelength optical signals toward at least one vertical connection optical switch 2000. The horizontal optical fiber connection network 2440 is connected to the first horizontal wavelength selective switch 2140, the second horizontal wavelength selective switch 2230, and the third demultiplexer 2420, and transmits a plurality of wavelength optical signals toward at least one horizontal connection optical switch 2000. Furthermore, the vertical optical fiber connection network 2430 and the horizontal optical fiber connection network 2440 include a plurality of transverse optical fibers. The plurality of transverse optical fibers are two 12-core ribbon fiber bundles. Other vertical connection optical switches 2000 are fully meshed to form the vertical optical network subsystem 1030. Note that other horizontal connection 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 Fig. 1, the horizontal optical network subsystem 1020 and the vertical optical network subsystem 1030 shown in Fig. 2, and the optical switch 2000 shown in Fig. 4, each of the virtual circuit-type optical switching network systems 1000 is shown as an example, configured with 25 optical switches 2000. The number of optical switches 2000 can also be adjusted depending on the actual data transmission situation. The number of each element of the optical switch 2000 and the number of ports of each element can also be changed depending on the number of optical switches 2000 included in the virtual circuit-type optical switching network system 1000, and is not limited here.

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

[0053] To summarize, 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 using multiple optical switches, and packet data is transmitted in the optical domain, eliminating the need for multiple optical-to-electrical and electrical-to-optical signal conversions. The interconnection between different server racks is achieved by a horizontal optical network subsystem and a vertical optical network subsystem, each consisting of a top switch and an optical switch, and horizontally and vertically connected optical switches. The optical switches integrate key components such as amplifiers, spectrometers / couplers, and wavelength selective switches. The optical upload module, optical transmission module, and optical download module, which are composed of these components, 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 a 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 an appropriate wavelength and route through a 1-input, 4-output wavelength selective switch according to the route requirements of the target optical switch. By using this wavelength selective switch and the newly designed transmission route, 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 examples are intended to explain embodiments of the present invention and to explain the characteristic configurations of the present invention. The present invention is not limited to the above examples. 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 is 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 1st Vertical Wavelength Selective Switch 2140 1st horizontal wavelength selective switch 2210 2nd Vertical Wavelength Selective Switch 2220 Second Amplifier 2230 Second Horizontal Wavelength Selective Switch 2240 3rd Horizontal Wavelength Selective Switch 2250 Third Amplifier 2260 3rd Vertical Wavelength Selective Switch 2310 4th Vertical Wavelength Selective Switch 2320 4th Horizontal Wavelength Selective Switch 2330 1st Coupler 2340 4th Amplifier 2350 Demultiplexer 2410 2nd spectrometer 2420 3rd spectrometer 2430 Vertical Fiber Optic Connection Network 2440 horizontal optical fiber connection network 3000 Top Switch 3010 Dense Wavelength Division Multiplexing Transceiver 4000 servers

Claims

1. an optical switch connected to the top switch and transmitting a plurality of wavelength optical signals with at least one vertical connection optical switch and at least one horizontal connection optical switch, an optical upload module; an optical download module; an optical transmission module; an optical fiber connection module that is connected to the optical upload module, the optical download module, and the optical transmission module to transmit the optical signals of the plurality of wavelengths; The optical upload module receives a plurality of wavelength upload optical signals from the top switch, selects a route and a wavelength, and then transmits the selected signal to the optical fiber connection module; the optical download module receives the plurality of wavelength optical signals from the at least one vertical connection optical switch and the at least one horizontal connection optical switch, and selectively merges and downloads the plurality of wavelength optical signals to the top switch; The optical transmission module and the optical fiber connection module transmit the optical signals of the plurality of wavelengths horizontally or vertically.

2. The optical upload module includes: a multiplexer that receives the plurality of wavelength upload optical signals from the top switch, and combines the plurality of wavelength upload optical signals to output a combined optical signal; a first amplifier that receives the merged optical signal from the multiplexer and amplifies the merged optical signal; a first splitter that receives the amplified merged optical signal from the first amplifier and copies the amplified merged optical signal into two merged optical signals to generate a first vertical optical signal and a first horizontal optical signal; a first vertical wavelength selective switch that receives the first vertical optical signal from the first demultiplexer and outputs at least one first vertical output optical signal to the at least one vertical connection optical switch; a first horizontal wavelength selective 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 includes: a second vertical wavelength selective switch that receives a plurality of vertical optical signals to be wavelength-selected from the optical fiber connection module and outputs a first direction-converted merged optical signal; a second amplifier that receives the first direction-converted merged optical signal from the second vertical wavelength selective switch and amplifies the received signal; a second horizontal wavelength selective switch that receives the amplified first direction-converted merged 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; a third horizontal wavelength selective switch that receives a plurality of horizontal optical signals to be wavelength-selected from the optical fiber connection module and outputs a second direction-converted merged optical signal; a third amplifier that receives the second direction-converted merged optical signal from the third horizontal wavelength selective switch and amplifies the received signal; a third vertical wavelength selective switch that receives the amplified second direction-converted merged 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 optical download module comprises: a fourth vertical wavelength selective switch that receives the plurality of vertical optical signals awaiting wavelength selection from the optical fiber connection module and outputs a first vertical merged optical signal; a fourth horizontal wavelength selective switch that receives the plurality of horizontal optical signals to be wavelength-selected from the optical fiber connection module and outputs a first horizontal merged optical signal; a first coupler that receives the first vertical merged optical signal and the first horizontal merged optical signal from the fourth vertical wavelength selective switch and the fourth horizontal wavelength selective switch, respectively, and couples the first vertical merged optical signal and the first horizontal merged optical signal to generate a download output optical signal; a fourth amplifier that receives and amplifies the download output optical signal from the first coupler; 4. The optical switch of claim 3, further comprising: a demultiplexer receiving the amplified download output optical signal from the fourth amplifier and separating 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 splitters and a plurality of third splitters; the plurality of second demultiplexers receive at least one second vertical optical signal from the at least one vertical connection optical switch, copy the second vertical optical signal, and output the plurality of wavelength selection waiting vertical optical signals to the second vertical wavelength selective switch and the fourth vertical wavelength selective switch; The optical switch of claim 4, wherein the plurality of third spectrometers receive at least one second horizontal optical signal from the at least one horizontal connection optical switch, copy the plurality of horizontal optical signals awaiting wavelength selection, and output the plurality of horizontal optical signals awaiting wavelength selection to the third horizontal wavelength selective switch and the fourth horizontal wavelength selective switch.

6. the fiber optic connection module includes a set of vertical fiber optic connection networks and a set of horizontal fiber optic connection networks; the set of vertical optical fiber connection networks is connected to the first vertical wavelength selective switch, the third vertical wavelength selective switch, and the second spectrometer, and transmits the plurality of wavelength optical signals toward the at least one vertical connection optical switch; The optical switch of claim 5, wherein the set of horizontal optical fiber connection networks is connected to the first horizontal wavelength selective switch, the second horizontal wavelength selective switch, and the third spectrometer, and transmits the plurality of wavelength optical signals toward the at least one horizontal connection optical switch.

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

8. 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 connection optical switches, and at least one vertical optical network subsystem formed by a plurality of interconnected vertical connection 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 is connected to the optical upload module, the optical download module, and the optical transmission module to transmit the optical signals of the plurality of wavelengths; the plurality of top switches including a plurality of dense wavelength division multiplexing transceivers connected to a corresponding one of the plurality of optical switches; The optical upload module receives a plurality of wavelength upload optical signals from the corresponding top switch, selects a path and a wavelength, and then transmits the selected path and wavelength to the optical fiber connection module, and transmits the selected path and wavelength to at least one vertical connection optical switch of the at least one vertical optical network subsystem or at least one horizontal connection optical switch of the at least one horizontal optical network subsystem through the optical fiber connection module; the optical download module receives the plurality of wavelength optical signals from at least one of the vertical connection optical switches and at least one of the horizontal connection optical switches, and selectively merges and downloads the plurality of wavelength optical signals to the top switch; the optical transmission module and the optical fiber connection module transmit the optical signals of the plurality of wavelengths horizontally or vertically; The plurality of top switches are a virtual circuit type optical switching network system that performs optical-electrical signal and electrical-optical signal conversion using the plurality of dense wavelength division multiplexing transceivers.

9. 9. The virtual circuit type optical switching network system according to claim 8, further comprising a plurality of servers connected to the corresponding plurality of top switches and transmitting data through the plurality of optical switches.

10. The optical upload module includes: a multiplexer that receives the plurality of wavelength upload optical signals from the top switch, and combines the plurality of wavelength upload optical signals to output a combined optical signal; a first amplifier that receives the merged optical signal from the multiplexer and amplifies the merged optical signal; a first splitter that receives the amplified merged optical signal from the first amplifier and copies the amplified merged optical signal into two merged optical signals to generate a first vertical optical signal and a first horizontal optical signal; a first vertical wavelength selective switch that receives the first vertical optical signal from the first demultiplexer and outputs at least one first vertical output optical signal to at least one of the vertical connection optical switches; a first horizontal wavelength selective switch that receives the first horizontal optical signal from the first demultiplexer 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 includes: a second vertical wavelength selective switch that receives a plurality of vertical optical signals to be wavelength-selected from the optical fiber connection module and outputs a first direction-converted merged optical signal; a second amplifier that receives the first direction-converted merged optical signal from the second vertical wavelength selective switch and amplifies the received signal; a second horizontal wavelength selective switch that receives the amplified first direction-converted merged 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; a third horizontal wavelength selective switch that receives a plurality of horizontal optical signals to be wavelength-selected from the optical fiber connection module and outputs a second direction-converted merged optical signal; a third amplifier that receives the second direction-converted merged optical signal from the third horizontal wavelength selective switch and amplifies the received signal; a third vertical wavelength selective switch that receives the amplified second direction-converted merged 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 optical download module comprises: a fourth vertical wavelength selective switch that receives the plurality of vertical optical signals awaiting wavelength selection from the optical fiber connection module and outputs a first vertical merged optical signal; a fourth horizontal wavelength selective switch that receives the plurality of horizontal optical signals to be wavelength-selected from the optical fiber connection module and outputs a first horizontal merged optical signal; a first coupler that receives the first vertical merged optical signal and the first horizontal merged optical signal from the fourth vertical wavelength selective switch and the fourth horizontal wavelength selective switch, respectively, and couples the first vertical merged optical signal and the first horizontal merged optical signal to generate a download output optical signal; a fourth amplifier that receives and amplifies the download output optical signal from the first coupler; 12. 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 splitters and a plurality of third splitters; the plurality of second demultiplexers receive at least one second vertical optical signal from the at least one vertical connection optical switch, copy the second vertical optical signal, and output the plurality of wavelength selection waiting vertical optical signals to the second vertical wavelength selective switch and the fourth vertical wavelength selective switch; 13. The virtual circuit-type optical switching network system according to claim 12, wherein the plurality of third demultiplexers receive at least one second horizontal optical signal from the at least one horizontal connection optical switch, copy the received signal, and output the plurality of horizontal optical signals awaiting wavelength selection to the third horizontal wavelength selective switch and the fourth horizontal wavelength selective switch.

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

15. 9. The virtual circuit-type optical switching network system according to claim 8, wherein the number of the optical switches in the optical network subsystems is a first quantity, the number of the optical network subsystems to which the optical switches directly connect is a second quantity, and the total number of the optical switches is equal to the first quantity multiplied by the second quantity.

16. the plurality of optical fibers are ribbon fibers; 9. The virtual circuit type optical switching network system according to claim 8, wherein 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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