WO2019052489A1

WO2019052489A1 - Network switching system for all-optical data center

Info

Publication number: WO2019052489A1
Application number: PCT/CN2018/105347
Authority: WO
Inventors: 沈纲祥; 高明义; 王宁
Original assignee: 苏州大学张家港工业技术研究院; 苏州大学
Priority date: 2017-09-13
Filing date: 2018-09-13
Publication date: 2019-03-21
Also published as: CN107493523B; CN107493523A

Abstract

Disclosed in the present invention is a network switching system for an all-optical data center. The system comprises an all-optical switching subsystem and a soft defined control subsystem. The all-optical switching subsystem comprises an optical switching unit and a plurality of OEO signal converters connected to the optical switching unit. Each OEO signal converter is also connected to an Ethernet switching device in a data center, so that high-speed interconnection is implemented among the Ethernet switching devices through the all-optical switching subsystem. The soft defined control subsystem is separately connected to the optical switching unit and each OEO signal converter and is used for collecting real-time state information of an optical switching plane and delivering a control instruction. By using the technical solution provided in embodiments of the present invention, the network switching system for an all-optical data center is established, the switching capacity can be increased, the network bandwidth can be improved, and the network delay can be reduced.

Description

All-optical data center network switching system

Technical field

The present invention relates to the field of optical communication technologies, and in particular, to an all-optical data center network switching system.

Background technique

With the rapid development of cloud computing technology, large data centers are gradually established, resulting in continuous growth of internal traffic in the data center.

The traditional electrical packet switched data center network has lower bandwidth and longer delay, which cannot meet the actual network requirements.

As the development of optical communication technology becomes more and more mature, how to construct the all-optical data center network switching system, increase the switching capacity, increase the bandwidth, and reduce the delay are technical problems that those skilled in the art urgently need to solve.

Summary of the invention

It is an object of the present invention to provide an all-optical data center network switching system to increase switching capacity, increase network bandwidth, and reduce network latency.

In order to solve the above technical problem, the present invention provides the following technical solutions:

An all-optical data center network switching system, comprising an all-optical switching subsystem and a soft definition control subsystem, the all-optical switching subsystem comprising an optical switching unit and a plurality of OEO signal converters connected to the optical switching unit, Each OEO signal converter is also respectively connected to an Ethernet switching device in the data center to enable high-speed interconnection between the Ethernet switching devices through the all-optical switching subsystem, the soft definition control subsystem and the light respectively The switching unit is connected to each OEO signal converter for collecting real-time status information of the optical switching plane and issuing the control command.

In an 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, and the AWGR-based core switching module and the signal input respectively The module is connected to each WSS optical switch module.

In an embodiment of the present invention, the OEO signal converter includes a first optical module, a second optical module, and a modulation and demodulation circuit, where the first optical module is connected to an Ethernet switching device, and the second optical module is The output port is connected to the signal input module of the optical switching unit, and the input port of the second optical module is connected to the output port of the WSS optical switch module.

In a specific implementation manner of the present invention, the second optical module is a wavelength tunable optical module.

In a specific embodiment of the invention, the soft definition control subsystem is coupled to the OEO signal converter and the WSS optical switch module, respectively.

In a specific embodiment of the invention, the soft definition control subsystem comprises a communication unit, a central processing unit, and a user interaction unit.

Applying the technical solution provided by the embodiment of the present invention, the all-optical data center network switching system is constructed by the all-optical switching subsystem and the soft-definition control subsystem, and the all-optical switching subsystem includes an optical switching unit and a plurality of optical switching units. OEO signal converter, each OEO signal converter is also connected to the Ethernet switching equipment in the data center, so that the Ethernet switching equipment realizes high-speed interconnection through the all-optical switching subsystem, and the soft definition control subsystem is respectively exchanged with the optical The unit is connected with each OEO signal converter, and is used for collecting the real-time state information of the optical switching plane and issuing the control command, thereby realizing the construction of the all-optical data center network switching system, which can increase the switching capacity, increase the network bandwidth, and reduce Small network delay.

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 embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic structural diagram of a all-optical data center network switching system according to an embodiment of the present invention;

2 is another schematic structural diagram of a plenoptic data center network switching system according to an embodiment of the present invention;

3 is another schematic structural diagram of a plenoptic data center network switching system according to an embodiment of the present invention;

4 is a schematic structural 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 ways

The present invention will be further described in detail below in conjunction with the drawings and embodiments. It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

1 and 2, FIG. 3 is a schematic structural diagram of an all-optical data center network switching system according to an embodiment of the present invention, where the system includes an all-optical switching subsystem 100 and a soft definition control subsystem 200. The all-optical switching subsystem 100 includes an optical switching unit and a plurality of OEO signal converters connected to the optical switching unit, and each OEO signal converter is also respectively connected to an Ethernet switching device in the data center to enable interconnection between the Ethernet switching devices. The high-speed interconnection is implemented by the all-optical switching subsystem 100. The soft-definition control subsystem 200 is connected to the optical switching unit and each of the OEO signal converters for collecting real-time status information of the optical switching plane and issuing control commands.

The all-optical data center network switching system provided by the embodiment of the present invention includes an all-optical switching subsystem 100 and a soft definition control subsystem 200.

The all-optical switching subsystem 100 can be connected to an Ethernet switching system in the data center. As shown in FIG. 1, the Ethernet switching system includes multiple Ethernet switching devices, and the Ethernet switching device can be an Ethernet switching router or an Ethernet switch. Wait. High-speed interconnection is achieved between the Ethernet switching devices through the all-optical switching subsystem 100. The all-optical switching subsystem 100 includes an optical switching unit and a plurality of OEO signal converters connected to the optical switching unit, OEO, that is, Optical Electrical Optical. Each OEO signal converter is also connected to an Ethernet switching device in the data center, that is, the Ethernet switching device can be connected to the optical switching unit through the OEO signal converter to implement interconnection between the Ethernet switching devices. As shown in FIG. 2, the data center includes four Ethernet switching devices, and each Ethernet switching device is connected to the other three Ethernet switching devices through the all-optical switching subsystem 100. Compared with the prior art, the electrical core switching method has lower energy consumption.

As shown in FIG. 2, the soft definition control subsystem 200 is respectively connected to the optical switching unit and each of the OEO signal converters, and can collect the real-time status information of the optical switching plane and issue the control commands. Specifically, the soft definition control subsystem 200 can 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 require power supply work. In the actual work process, the 10 Gbps of the OEO optical module can be replaced with 40 Gbps to achieve capacity upgrade.

The entire architecture of the data center can contain data planes and control planes. From the data plane (optical switching plane), the data plane can include an application service layer and a data transport layer.

The application service corresponding to the all-optical data center network switching system provided by the embodiment of the present invention may include a high-definition video, a small cloud computing platform, and the like.

The data transport layer can include Ethernet switching and all-optical switching.

In an actual application, an Ethernet switch can be used as an example. The Ethernet switch can include an uplink optical interface and a user interface, and the uplink optical interface is used to connect to the OEO signal converter. The upstream optical interface of each Ethernet switch is connected to the OEO signal converter to be connected to the optical switching unit through the OEO signal converter. The upstream optical interface bandwidth can be 10 Gbps. The client interface of each Ethernet switch can be connected to the user equipment, such as the video server, the remote screen, and the like shown in FIG. The client interface bandwidth can be 1 Gbps 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 switch module, and a plurality of WSS optical switch modules, and the AWGR-based core switch module and the signal input module and each WSS respectively. The optical switch module is connected.

AWGR, Arrayed Waveguide Grating Router, Arrayed Waveguide Grating Router.

As shown in FIG. 5, the core switching module based on AWGR can specifically adopt a 200 GHz AWG as a core device. The signal input module as an input port is connected to the OEO signal converter to ensure any variable wavelength input. 4×4AWGR completes the band exchange. The WSS optical switch module as an output port may specifically be a 1×3 wavelength selective switch WSS, ensuring that any wavelength can be output from any output port.

The above architecture has certain flexibility, and can implement multiple switching combinations, such as 1-to-1 switching, that is, three wavelengths of one input port simultaneously to one output port, or three-to-three switching, that is, each input port has a wavelength to Different output ports.

The soft definition control subsystem 200 can be coupled to an OEO signal converter and a WSS optical switch module, respectively. In order to achieve different combinations, in addition to controlling the output wavelength of the OEO signal converter, the output wavelength of the WSS can also be controlled.

As shown in 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, and the output port of the second optical module and the optical switching unit are The signal input module is connected, and the input port of the second optical module is connected to the output port of the WSS optical switch module.

In the actual working process, the first optical module can convert the optical signal of the optical interface of the Ethernet switching device into an electrical signal and transmit it to the modulation and demodulation circuit, and the modulation and demodulation circuit modulates the electrical signal and transmits the signal to the second optical module. The second optical module is connected to the optical switching unit, and outputs the converted optical signal.

Specifically, the second optical module can be a wavelength tunable optical module. In the embodiment of the present 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 the wavelength adjustment control of the wavelength of the second optical module is performed through a software interface, as shown in FIG. 4 . The first optical module may be 1310 nm, and the second optical module may be 1550 nm. Each optical module includes one optical receiver and one optical transmitter.

The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same or similar parts of the respective embodiments may be referred to each other.

A person skilled in the art will further appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware, computer software or a combination of both, in order to clearly illustrate the hardware and software. Interchangeability, the composition and steps of the various examples have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods for implementing the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present invention.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be implemented directly in hardware, a software module executed by a processor, or a combination of both. The software module can be placed in random access memory (RAM), memory, read only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or technical field. Any other form of storage medium known.

The principles and embodiments of the present invention have been described with reference to specific examples. The description of the above embodiments is only for helping to understand the technical solutions of the present invention and the core ideas thereof. It should be noted that those skilled in the art can make various modifications and changes to the present invention without departing from the spirit and scope of the invention.

Claims

An all-optical data center network switching system, comprising: an all-optical switching subsystem (100) and a soft definition control subsystem (200), the all-optical switching subsystem (100) comprising an optical switching unit and a device a plurality of OEO signal converters connected to the optical switching unit, each OEO signal converter is also respectively connected to an Ethernet switching device in the data center, so that the all-optical switching subsystem (100) is passed between the Ethernet switching devices The high-definition interconnecting system (200) is respectively connected to the optical switching unit and each of the OEO signal converters for collecting real-time status information of the optical switching plane and issuing the control command.
The all-optical data center network switching system according to claim 1, wherein the optical switching unit comprises a signal input module, an AWGR-based core switching module, and a plurality of WSS optical switch modules, and the AWGR-based core The switch module is respectively connected to the signal input module and each WSS optical switch module.
The all-optical data center network switching system according to claim 2, wherein the OEO signal converter comprises a first optical module, a second optical module, and a modulation and demodulation circuit, and the first optical module and the Ethernet switching device The output port of the second optical module is connected to the signal input module of the optical switching unit, and the input port of the second optical module is connected to the output port of the WSS optical switch module.
The all-optical data center network switching system according to claim 3, wherein the second optical module is a wavelength tunable optical module.
The all-optical data center network switching system of claim 2 wherein said soft definition control subsystem (200) is coupled to an OEO signal converter and a WSS optical switch module, respectively.
The plenoptic data center network switching system according to any one of claims 1 to 5, wherein the soft definition control subsystem (200) comprises a communication unit, a central processing unit, and a user interaction unit.