CN107493523B - All-optical data center network switching system - Google Patents
All-optical data center network switching system Download PDFInfo
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- CN107493523B CN107493523B CN201710822323.2A CN201710822323A CN107493523B CN 107493523 B CN107493523 B CN 107493523B CN 201710822323 A CN201710822323 A CN 201710822323A CN 107493523 B CN107493523 B CN 107493523B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0005—Switch and router aspects
- H04Q2011/0007—Construction
- H04Q2011/0032—Construction using static wavelength routers (e.g. arrayed waveguide grating router [AWGR] )
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0084—Quality of service aspects
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Abstract
The invention discloses an all-optical data center network switching system which comprises an all-optical switching subsystem and a soft definition control subsystem, wherein the all-optical switching subsystem comprises an optical switching unit and a plurality of OEO signal converters connected with the optical switching unit, each OEO signal converter is also connected with an Ethernet switching device in a data center respectively so as to realize high-speed interconnection between the Ethernet switching devices through the all-optical switching subsystem, and the soft definition control subsystem is connected with the optical switching unit and each OEO signal converter respectively and is used for collecting real-time state information of an optical switching plane and issuing a control instruction. By applying the technical scheme provided by the embodiment of the invention, the construction of the all-optical data center network switching system is realized, the switching capacity can be increased, the network bandwidth is improved, and the network delay is reduced.
Description
Technical Field
The invention relates to the technical field of optical communication, in particular to an all-optical data center network switching system.
Background
With the rapid development of cloud computing technology, large data centers are gradually built, so that the internal traffic of the data centers continuously increases.
The traditional electric packet switching data center has low network bandwidth and large time delay, and can not meet the practical network requirements.
With the development of optical communication technology becoming more mature, how to construct an all-optical data center network switching system, increase switching capacity, improve bandwidth and reduce delay is a technical problem which needs to be solved urgently by technical personnel in the field at present.
Disclosure of Invention
The invention aims to provide an all-optical data center network switching system to increase the switching capacity, improve the network bandwidth and reduce the network delay.
In order to solve the technical problems, the invention provides the following technical scheme:
an all-optical data center network switching system comprises an all-optical switching subsystem and a soft definition control subsystem, wherein the all-optical switching subsystem comprises an optical switching unit and a plurality of OEO signal converters connected with the optical switching unit, each OEO signal converter is further connected with an Ethernet switching device in a data center respectively so that high-speed interconnection among the Ethernet switching devices is achieved through the all-optical switching subsystem, and the soft definition control subsystem is connected with the optical switching unit and each OEO signal converter respectively and used for collecting real-time state information of an optical switching plane and issuing control instructions.
In a specific embodiment of the present invention, the optical switching unit includes a signal input module, an AWGR-based core switching module, and a plurality of WSS optical switch modules, where the AWGR-based core switching module is connected to the signal input module and each WSS optical switch module respectively.
In a specific embodiment of the present invention, the OEO signal converter includes a first optical module, a second optical module, and a modulation and demodulation circuit, the first optical module is connected to an ethernet switch device, an output port of the second optical module is connected to the signal input module of the optical switch unit, and an input port of the second optical module is connected to an output port of the WSS optical switch module.
In one embodiment of the present invention, the second optical module is a wavelength tunable optical module.
In an embodiment of the present invention, the soft-definition control subsystem is respectively connected to the OEO signal converter and the WSS optical switch module.
In one embodiment of the present invention, the soft definition control subsystem includes a communication unit, a central processing unit, and a user interaction unit.
By applying the technical scheme provided by the embodiment of the invention, an all-optical data center network switching system is constructed by an all-optical switching subsystem and a soft definition control subsystem, wherein the all-optical switching subsystem comprises an optical switching unit and a plurality of OEO signal converters connected with the optical switching unit, each OEO signal converter is also connected with an Ethernet switching device in a data center respectively so as to realize high-speed interconnection between the Ethernet switching devices through the all-optical switching subsystem, and the soft definition control subsystem is connected with the optical switching unit and each OEO signal converter respectively and is used for collecting real-time state information of an optical switching plane and issuing a control instruction, so that the construction of the all-optical data center network switching system is realized, the switching capacity can be increased, the network bandwidth is improved, and the network delay is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an all-optical data center network switching system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an all-optical data center network switching system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an all-optical data center network switching system according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of an OEO signal converter according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an optical switching unit according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 2, and fig. 3, a structural schematic diagram of an all-optical data center network switching system provided by an embodiment of the present invention includes an all-optical switching subsystem 100 and a soft definition control subsystem 200, where the all-optical switching subsystem 100 includes an optical switching element and a plurality of OEO signal converters connected to the optical switching element, each OEO signal converter is further connected to an ethernet switching device in a data center, respectively, so as to implement high-speed interconnection between the ethernet switching devices through the all-optical switching subsystem 100, and the soft definition control subsystem 200 is connected to the optical switching element and each OEO signal converter, respectively, and is used for collecting real-time status information of an optical switching plane and issuing a control instruction.
The all-optical data center network switching system provided by the embodiment of the invention comprises an all-optical switching subsystem 100 and a soft definition control subsystem 200.
The all-optical switching subsystem 100 may be connected to an ethernet switching system in a data center, as shown in fig. 1, where the ethernet switching system includes a plurality of ethernet switching devices, and the ethernet switching devices may be ethernet switching routers or ethernet switches. High-speed interconnection between ethernet switching devices is realized through the all-optical switching subsystem 100. The all-optical switching subsystem 100 includes an optical switching element and several OEO signal converters, OEOs, i.e. optical electrical optical, connected to the optical switching element. Each OEO signal converter is also connected with the ethernet switching equipment in the data center, that is, the ethernet switching equipment can be connected with the optical switching unit through the OEO signal converter, so as to realize interconnection and intercommunication among the ethernet switching equipment. As shown in fig. 2, four ethernet switching devices are contained in the data center, and each ethernet switching device is connected to three other ethernet switching devices through the all-optical switching subsystem 100. Compared with the electric core exchange mode in the prior art, the method has lower energy consumption.
As shown in fig. 2, the soft definition control subsystem 200 is connected to the optical switching unit and each OEO signal converter, respectively, and can collect real-time status information of the optical switching plane and issue a control command. In particular, the soft definition control subsystem 200 may include a communication unit, a central processing unit, and a user interaction unit. The user sends the control command to the all-optical switching subsystem 100 through the communication unit, the user interaction unit and the central processing unit.
The optical switching unit is a passive device and does not need to be powered. In the actual working process, 10Gbps of the OEO optical module is changed into 40Gbps, so that the capacity can be upgraded.
The overall architecture of the data center may include a data plane and a control plane. From the data plane (optical switching plane) the data plane may contain an application service layer and a data transport layer.
The application services corresponding to the all-optical data center network switching system provided by the embodiment of the invention can comprise high-definition videos, small cloud computing platforms and the like.
The data transport layer may include ethernet switching and all-optical switching.
In practical applications, taking an ethernet switch as an example, the ethernet switch may include an upstream optical interface and a customer premise interface, and the upstream optical interface is used for connecting with the OEO signal converter. The upstream optical interface of each ethernet switch is connected to an OEO signal converter and thereby to the optical switching unit via the OEO signal converter. The upstream optical interface bandwidth may be 10 Gbps. The customer premise interface of each ethernet switch may be connected to customer equipment such as the video server, remote screen, etc. shown in fig. 3. The bandwidth of the user side interface can be 1Gbps or 10 Gbps.
Referring to fig. 2, the optical switching unit may include a signal input module, that is, a combiner, an AWGR-based core switching module, and several WSS optical switch modules, where the AWGR-based core switching module is connected to the signal input module and each WSS optical switch module, respectively.
AWGR, Arrayed Waveguide Grating Router.
Referring to fig. 5, the AWGR-based core switch module may specifically use a 200 GHz-band AWG as a core device. The signal input module as an input port is connected with the OEO signal converter to ensure any variable wavelength input. The 4 × 4AWGR completes the band swap. The WSS optical switch module as the output port may be specifically a 1 × 3 wavelength selective switch WSS, ensuring that any wavelength can be output from any output port.
The architecture has certain flexibility and can realize various switching combinations, such as 1-to-1 switching, that is, 3 wavelengths of one input port simultaneously go to one output port, or 3-to-3 switching, that is, each input port has one wavelength going to a different output port.
The soft definition control subsystem 200 may be connected to the OEO signal converter and the WSS optical switch module, respectively. So that the output wavelength of the WSS can be controlled in addition to the output wavelength of the OEO signal converter when different combinations are implemented.
Referring to fig. 4, the OEO signal converter may include a first optical module, a second optical module and a modulation and demodulation circuit, the first optical module is connected to the ethernet switching device, an output port of the second optical module is connected to the signal input module of the optical switching unit, and an input port of the second optical module is connected to an output port of the WSS optical switch module.
In an actual working process, the first optical module can convert an optical signal of an optical interface of the ethernet switching device into an electrical signal and transmit the electrical signal to the modulation and demodulation circuit, the modulation and demodulation circuit modulates the electrical signal and transmits the electrical signal to the second optical module, and the second optical module is connected with the optical switching unit and outputs the converted optical signal.
Specifically, the second optical module may be a wavelength tunable optical module. In the embodiment of the invention, the wavelength of the second optical module can be controlled by the optical module wavelength control circuit. The optical module wavelength control circuit is connected to the soft definition control subsystem 200 through an ethernet interface, and performs wavelength adjustment control on the wavelength of the second optical module through a software interface, as shown in fig. 4. The first optical module may be 1310nm and the second optical module may be 1550nm, each optical module comprising an optical receiver and an optical emitter.
By applying the technical scheme provided by the embodiment of the invention, an all-optical data center network switching system is constructed by an all-optical switching subsystem and a soft definition control subsystem, wherein the all-optical switching subsystem comprises an optical switching unit and a plurality of OEO signal converters connected with the optical switching unit, each OEO signal converter is also connected with an Ethernet switching device in a data center respectively so as to realize high-speed interconnection between the Ethernet switching devices through the all-optical switching subsystem, and the soft definition control subsystem is connected with the optical switching unit and each OEO signal converter respectively and is used for collecting real-time state information of an optical switching plane and issuing a control instruction, so that the construction of the all-optical data center network switching system is realized, the switching capacity can be increased, the network bandwidth is improved, and the network delay is reduced.
The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same or similar parts among the embodiments are referred to each other.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The principle and the implementation of the present invention are explained in the present application by using specific examples, and the above description of the embodiments is only used to help understanding the technical solution and the core idea of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (5)
1. An all-optical data center network switching system is characterized by comprising an all-optical switching subsystem (100) and a soft definition control subsystem (200), wherein the all-optical switching subsystem (100) comprises an optical switching unit and a plurality of OEO signal converters connected with the optical switching unit, each OEO signal converter is further connected with an Ethernet switching device in a data center respectively so as to realize high-speed interconnection among the Ethernet switching devices through the all-optical switching subsystem (100), and the soft definition control subsystem (200) is connected with the optical switching unit and each OEO signal converter respectively and is used for collecting real-time state information of an optical switching plane and issuing a control instruction;
the optical switching unit comprises a signal input module, an AWGR-based core switching module and a plurality of WSS optical switch modules, wherein the AWGR-based core switching module is respectively connected with the signal input module and each WSS optical switch module; the AWGR-based core switching module adopts 200GHz waveband AWGR as a core device, the signal input module serving as an input port is connected with the OEO signal converter, and if 4 × 4AWGR completes waveband switching, the WSS optical switch module serving as an output port is a 1 × 3 wavelength selective switch WSS.
2. The all-optical data center network switching system according to claim 1, wherein the OEO signal converter includes a first optical module, a second optical module, and a modem circuit, the first optical module is connected to the ethernet switching device, an output port of the second optical module is connected to the signal input module of the optical switching unit, and an input port of the second optical module is connected to an output port of the WSS optical switch module.
3. The all-optical data center network switching system of claim 2, wherein the second optical module is a wavelength-tunable optical module.
4. The all-optical data center network switching system according to claim 1, wherein the soft-defined control subsystem (200) is connected to the OEO signal converter and the WSS optical switch module, respectively.
5. The all-optical data center network switching system according to any one of claims 1 to 4, characterized in that the soft definition control subsystem (200) comprises a communication unit, a central processing unit, and a user interaction unit.
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| CN201710822323.2A CN107493523B (en) | 2017-09-13 | 2017-09-13 | All-optical data center network switching system |
| PCT/CN2018/105347 WO2019052489A1 (en) | 2017-09-13 | 2018-09-13 | Network switching system for all-optical data center |
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| CN201710822323.2A CN107493523B (en) | 2017-09-13 | 2017-09-13 | All-optical data center network switching system |
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| CN107493523B true CN107493523B (en) | 2021-02-12 |
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| CN107493523B (en) * | 2017-09-13 | 2021-02-12 | 苏州大学 | All-optical data center network switching system |
| CN113141546B (en) * | 2020-01-20 | 2022-07-22 | 华为技术有限公司 | Processor system, memory access method and computer device |
| CN115734103A (en) * | 2021-08-30 | 2023-03-03 | 华为技术有限公司 | Optical communication system, optical communication method, and optical signal switching apparatus |
| CN115623365B (en) * | 2022-09-13 | 2023-07-11 | 苏州大学 | Service deployment method, system and optical channel of all-optical data center network |
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| CN105744386A (en) * | 2014-12-12 | 2016-07-06 | 中兴通讯股份有限公司 | Business processing method and business processing device |
| WO2017044405A1 (en) * | 2015-09-10 | 2017-03-16 | Equinix, Inc. | Automated fiber cross-connect service within a multi-tenant interconnection facility |
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| CN107493523B (en) * | 2017-09-13 | 2021-02-12 | 苏州大学 | All-optical data center network switching system |
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| CN105744386A (en) * | 2014-12-12 | 2016-07-06 | 中兴通讯股份有限公司 | Business processing method and business processing device |
| WO2017044405A1 (en) * | 2015-09-10 | 2017-03-16 | Equinix, Inc. | Automated fiber cross-connect service within a multi-tenant interconnection facility |
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