WO2017092215A1 - 一种数据中心网络系统及信号传输系统 - Google Patents

一种数据中心网络系统及信号传输系统 Download PDF

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Publication number
WO2017092215A1
WO2017092215A1 PCT/CN2016/079329 CN2016079329W WO2017092215A1 WO 2017092215 A1 WO2017092215 A1 WO 2017092215A1 CN 2016079329 W CN2016079329 W CN 2016079329W WO 2017092215 A1 WO2017092215 A1 WO 2017092215A1
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WIPO (PCT)
Prior art keywords
switch
input
signal
electrical signal
output port
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PCT/CN2016/079329
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English (en)
French (fr)
Inventor
曹耀兵
颜清华
苏立清
胡棣
曲继先
王传兵
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华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP16869529.4A priority Critical patent/EP3364605B1/en
Publication of WO2017092215A1 publication Critical patent/WO2017092215A1/zh
Priority to US15/991,830 priority patent/US10454585B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/44—Star or tree networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/27—Arrangements for networking
    • H04B10/272—Star-type networks or tree-type networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0201—Add-and-drop multiplexing
    • H04J14/0202—Arrangements therefor
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0201—Add-and-drop multiplexing
    • H04J14/0215—Architecture aspects
    • H04J14/0217—Multi-degree architectures, e.g. having a connection degree greater than two
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
    • H04J14/0228—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths
    • H04J14/023—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON]
    • H04J14/0232—Wavelength allocation for communications one-to-all, e.g. broadcasting wavelengths in WDM passive optical networks [WDM-PON] for downstream transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H04J14/0278—WDM optical network architectures
    • H04J14/0282—WDM tree architectures
    • 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
    • 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
    • H04Q2011/0022—Construction using fibre gratings
    • 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] )
    • 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
    • H04Q2011/0088—Signalling aspects
    • 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
    • H04Q2011/009—Topology aspects
    • H04Q2011/0094—Star

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data center network system and a signal transmission system.
  • a data center network is a network applied to a data center. It is mainly composed of a large number of Layer 2 access devices and a small number of Layer 3 devices. As shown in FIG. 1 , the existing data center network is a hierarchical structure of hierarchical aggregation, and generally includes three levels: an access layer, an aggregation layer, and a core layer.
  • the access layer device 1 corresponding to the server 1
  • the signal needs to be sent to the access layer device 1, and the access layer device 1 needs to send the signal to the aggregation layer device 1; since the aggregation layer device 1 governs the access layer device 2 to which the server 2 belongs, the convergence layer
  • the device 1 transmits the signal to the access layer device 2, and the signal is transmitted by the access layer device 2 to the server 2.
  • the hierarchical structure of the traditional hierarchical aggregation is equivalent to a tree structure, and the signals sent by each server are forwarded through the aggregation layer device and/or the core layer device, and as the demand for signal transmission increases, The performance requirements of the aggregation layer device and the core layer device are higher and higher. The high-performance aggregation layer device and the core layer device will cause high networking costs and subsequent difficulties in maintaining the device.
  • the device methods such as the aggregation layer device and the core layer device in the traditional data center network are generally used to solve the problem of high networking cost and difficulty in maintenance of the existing data center network.
  • the problem is that the aggregation hierarchical structure is transformed into a decentralized mesh architecture, so that there is a physical connection path between every two switches. When any server needs to access another server, only the connection is made through any one server. The physical connection path between the switch and the switch connected to another server can communicate.
  • the technical solution solves the problem of transmission bottleneck caused by the aggregation layer device and the core layer device in the signal transmission process, and achieves the purpose of decentralization.
  • a scheme for directly connecting channels between each two switch devices exists. The problem of a large number of wiring.
  • the current data center network has a problem of a large number of wiring lines and difficulty in maintenance.
  • the embodiment of the invention provides a data center network system and a signal transmission system, which are used to solve the problem that the number of wires existing in the traditional data center network is large and the maintenance is difficult.
  • a data center network system including a hub device, at least two switches, multiple color light modules, at least two multiplexers/demultiplexers, and at least two servers, wherein:
  • At least one of the at least two switches has a communication connection with at least one server, and different input/output ports of each switch have a communication connection with different color light modules;
  • Different color light modules that have communication connections with different input/output ports of each switch are in communication connection with a multiplexer/demultiplexer, wherein different switches communicate with different multiplexers/demultiplexers through the color light module. connection;
  • the at least two switches form a star network topology through the multiplexer/demultiplexer and the one hub device, and the hub devices are respectively connected to different multiplexers/demultiplexers through different ports;
  • the switch is configured to receive at least two electrical signals, and process each of the at least two electrical signals according to the following processing manner for the first electrical signal: determining and the first electrical signal
  • the input/output port corresponding to the destination address carried in the source, the first electrical signal is output through the determined input/output port; wherein the destination address is used to indicate a destination server, corresponding to the destination address
  • An input/output port refers to a communication connection with the destination server
  • An input/output port corresponding to the destination switch the destination server is one of the at least two servers, and the destination switch is a switch that is communicatively connected to the destination server;
  • the at least two electrical signals include the following Any one or combination of: an electrical signal transmitted by a server having a communication connection with the switch, and an electrical signal from other switches of the at least two switches;
  • the color light module is configured to receive an electrical signal output by an input/output port of the switch that is in communication connection with itself, and convert the received electrical signal into an optical signal of a specific wavelength, wherein, with a switch
  • the wavelengths of optical signals converted by different color light modules in which different input/output ports have communication connections are different;
  • the multiplexer/demultiplexer is configured to receive a plurality of optical signals respectively sent by the plurality of color light modules that are in communication connection with the plurality of optical signals, and to wavelength-multiplex the plurality of optical signals into a combined signal;
  • the hub device is configured to receive a combined signal sent by the multiplexer/demultiplexer, and demultiplex the combined signal to obtain a plurality of optical signals; and send the multiple optical signals to and a port corresponding to the destination switch of each optical signal, and outputting each of the optical signals from the corresponding port, and wavelength division multiplexing the optical signals output from the same port into a combined signal;
  • the multiplexer/demultiplexer is further configured to receive a combined signal from the hub device, and demultiplex the combined signal to obtain a plurality of optical signals, and input the plurality of optical signals separately a color light module corresponding to a wavelength of the optical signal;
  • the color light module is further configured to receive an optical signal from the multiplexer/demultiplexer, and convert the optical signal into an electrical signal, and output the signal to an input/output port of a switch that has a communication connection with itself;
  • the switch is further configured to forward an electrical signal received from the color light module to a destination server of the electrical signal.
  • the system further includes an SDN controller, where the SDN controller has a communication connection with each switch in the system: the switch is further configured to receive at least And an electrical signal for each of the at least one electrical signal is processed according to the following processing manner for the second electrical signal: determining and the second electrical signal
  • the input/output port corresponding to the destination address carried in the port transmits a load overload notification to the SDN controller when the load of the input/output port corresponding to the destination address carried in the second electrical signal is overloaded; the SDN control And, when receiving the notification sent by the switch, in each input/output port of the switch that sends the notification, except for an input/output port corresponding to a destination address of the second electrical signal Selecting at least one input/output port among the input/output ports, and feeding back the selected at least one input/output port to the switch that sends the notification; in the at least two switches, sending a notification to the SDN controller
  • the switch is further configured to output the received at least
  • the at least one input/output port selected by the SDN controller is in an input/output port of the switch that sends the notification At least one input/output port with the least amount of load.
  • the SDN controller is configured according to a load balancing principle, in each input/output port of the switch that sends the notification, At least one of the input/output ports other than the input/output port corresponding to the destination address of the two-way electrical signal is selected.
  • the SDN controller schedules signals according to the load status of each port of each switch, so that each switch has its own
  • the load balancing of the port avoids the problem that some ports are congested and the signal transmission efficiency is low.
  • At least one color light module of the color light module is located inside the switch that is in communication connection with itself.
  • the hub device is an arrayed waveguide grating AWG.
  • the AWG can transmit the received optical signals of different wavelengths to each switch in the data center network system, thereby logically achieving full network coverage; and, since the AWG is an optical device, the optical device The performance is far superior to that of the electrical device. Therefore, the AWG realizes the interconnection of the switches in the data center network system, and can also solve the power consumption of the network equipment brought by the multi-level network in the prior art, and the maintenance difficulty. The problem.
  • the switch after receiving the at least two electrical signals, is further configured to: determine whether the at least two electrical signals are transmitted to a server that is in communication connection with the self. An electrical signal; if present, forwarding the electrical signal to a destination server that is in communication with itself via an input/output port on the switch corresponding to the destination address of the electrical signal; otherwise, performing the electrical signal And transmitting, by the input/output port on the switch corresponding to the destination address of the electrical signal, the electrical signal to a color optical module having a communication connection with the input/output port.
  • the switch when the routing policy included in the switch does not include an input/output port corresponding to the destination address, the switch is further used to: Transmitting a broadcast message to all input/output ports of the electrical signal according to the destination address carried in the electrical signal, and acquiring an input/output port of the feedback response message by using a transmission control protocol TCP/interconnection protocol IP protocol, and the feedback response is Transmitting a mapping relationship between the input/output port of the message and the destination address carried in the electrical signal to the routing policy; transmitting the electrical signal to the existing communication port through the input/output port of the feedback response message Connected color light module.
  • the switch when the routing policy of the switch does not include the destination address carried in the electrical signal, the switch can obtain the input/output port corresponding to the destination address through the TCP/IP protocol, thereby ensuring reliable transmission of the electrical signal. Improve the efficiency of electrical signal transmission.
  • a signal transmission system comprising at least two star network topologies, each The star network topology comprises a hub device, at least two switches, a plurality of color light modules, at least two multiplexers/demultiplexers, and at least two servers, the at least two star network topologies There is a communication connection between the hub devices inside,
  • At least one of the at least two switches has a communication connection with at least one server, and different input/output ports of each switch have communication with different color light modules.
  • Connections, different color light modules that have communication connections with different input/output ports of each switch are in communication connection with one multiplexer/demultiplexer, wherein different switches pass the color light module and different multiplex/split Communicating, the at least two switches form a star network topology with the one hub device through the multiplexer/demultiplexer, and the hub devices respectively pass different ports and different multiplexers/demultiplexers Communication connection
  • said switch within one of said star network topologies for receiving at least two electrical signals and for each of said at least two electrical signals
  • the one electrical signal is processed according to the following processing manner for the first electrical signal: determining an input/output port corresponding to the destination address carried in the first electrical signal, and the first input/output port is determined by the determined input/output port An electrical signal output; wherein the destination address is used to indicate a destination server, and the input/output port corresponding to the destination address is an input/output port corresponding to the destination switch communicatively connected to the destination server,
  • the destination server is a server in another star network topology, and the destination switch is a switch that is communicatively connected to the destination server;
  • the at least two electrical signals include any one or combination of the following: communication with the switch The electrical signal sent by the connected server, and the at least from the same star network topology as the switch Electrical signals from other switches in the two switches, and electrical signals from switches belonging to different star network topologies to the switch;
  • the color light module is configured to receive an electrical signal output by an input/output port of the switch that is in communication connection with itself, and convert the received electrical signal into an optical signal of a specific wavelength, wherein, with a switch
  • the wavelengths of optical signals converted by different color light modules in which different input/output ports have communication connections are different;
  • the multiplexer/demultiplexer is configured to receive a plurality of color light modules that are in communication connection with themselves Transmitting a plurality of optical signals, and wavelength division multiplexing the plurality of optical signals into a combined signal;
  • the hub device is configured to receive a combined signal sent by a multiplexer/demultiplexer in the same star network topology as the hub device, and/or located in a different star network topology with the hub device a combined signal sent by the hub device, and demultiplexing the combined signal to obtain a plurality of optical signals; respectively, transmitting the plurality of optical signals to a port corresponding to a destination switch of each of the optical signals, and Outputting each of the optical signals from the corresponding port, and wavelength-multiplexing the optical signals output from the same port into a combined signal, wherein the destination switch of the at least one of the plurality of optical signals is obtained Located in another star network topology, the optical signal of the destination switch located in another star network topology is output through one port of the hub device and transmitted to another hub device;
  • the combining/demultiplexing device is further configured to receive a combined signal from a hub device that is in communication connection with itself, and demultiplex the combined signal to obtain a plurality of optical signals, and the plurality of optical signals
  • the optical signals are respectively input to the color light module corresponding to the wavelength of the optical signal;
  • the color light module is further configured to receive an optical signal from the multiplexer/demultiplexer that is in communication connection with itself, and convert the optical signal into an electrical signal and output the signal to a switch that has a communication connection with itself.
  • Input/output port ;
  • the switch is further configured to forward an electrical signal received from the color optical module that is in communication connection with the communication to the destination server of the electrical signal.
  • the system further includes a software-defined network SDN controller, where the SDN controller has a communication connection with each switch in the system: the switch is further used Receiving at least one electrical signal, and processing each of the at least one electrical signal according to the following processing manner for the second electrical signal: determining a destination address corresponding to the second electrical signal
  • the input/output port sends a notification of a load overload to the SDN controller when the load of the input/output port corresponding to the destination address carried in the second electrical signal is overloaded;
  • the SDN controller is configured to receive When the notification is sent by the switch, at least one of the input/output ports other than the input/output port corresponding to the destination address of the second electrical signal is selected in each input/output port of the switch that sends the notification.
  • the at least one input/output port selected by the SDN controller is the switch that sends the notification At least one input/output port with the smallest amount of load on the input/output port.
  • the SDN controller according to the load balancing principle Among the respective input/output ports of the switch that transmits the notification, at least one of the input/output ports other than the input/output port corresponding to the destination address of the second electrical signal is selected.
  • the SDN controller schedules signals according to the load status of each port of each switch, so that each switch has its own
  • the load balancing of the port avoids the problem that some ports are congested and the signal transmission efficiency is low.
  • the first possible implementation manner of the second aspect the second possible implementation manner, any one of the third possible implementation manners, in the fourth possible implementation manner, the system Also included is an extension arm switch through which the hub device is communicatively coupled to other at least one hub device.
  • the switch when the routing policy included in the switch does not include an input/output port corresponding to the destination address, the switch is further configured to: according to the destination address carried in the electrical signal, to the All the input/output ports respectively broadcast a message, and the input/output port of the feedback response message is obtained by using the Transmission Control Protocol TCP/Interconnect Protocol IP protocol, and the input/output port of the feedback response message and the destination address carried in the electrical signal are The mapping relationship is saved to the routing strategy Transmitting the electrical signal through an input/output port of the feedback response message to a color light module in communication connection with itself.
  • the switch when the routing policy of the switch does not include the destination address carried in the electrical signal, the switch can obtain the input/output port corresponding to the destination address through the TCP/IP protocol, thereby ensuring reliable transmission of the electrical signal. Improve the efficiency of electrical signal transmission.
  • the data center network system adopts a star network topology structure, and the star network topology is centered on the hub device, and each hub device has a communication connection with at least two switches in each star network.
  • at least one of the at least two switches has a communication connection with at least one server.
  • each switch has a hub device that has a communication connection with itself, and the hub device and the switch form a star network topology structure, and the star network topology does not need to be in each of the star network topologies.
  • the physical connection channel is established between the switch devices, and the wiring between the devices is less, which can effectively reduce the number of network cabling and reduce the workload of subsequent network maintenance; and, compared with the current three-layer network architecture, the source server All the signals sent to the destination server need to be forwarded by the aggregation layer device and the core layer device.
  • the signal output by the source server sequentially passes through the source switch and the hub device that are in communication connection with the source server.
  • the destination switch that has a communication connection with the destination server, and then reaches the destination server, all signals are forwarded only through the hub device, and the signal forwarding level is less than that of the three-layer network architecture, thereby facilitating the implementation of the data center network system.
  • the data center network system further includes a color light module, and the color light module sends the server to the switch.
  • the electrical signal is converted into an optical signal, so that only the optical signal is transmitted between the hub device and the color light module. Since the optical signal has the advantages of high transmission reliability, fast transmission speed, and large amount of transmitted data, the embodiment of the present invention
  • the data center network system can carry a larger amount of data and improve the reliability and transmission efficiency of signal transmission.
  • FIG. 1 is a schematic structural diagram of a data center network in the prior art
  • FIG. 2a is a schematic structural diagram of a physical connection structure of a data center network system according to Embodiment 1 of the present invention
  • FIG. 2b is a schematic diagram of a logical connection structure of a data center network system according to Embodiment 1 of the present invention.
  • FIG. 3 is a flowchart of signal transmission in a data center network system according to Embodiment 2 of the present invention.
  • FIG. 4 is a schematic structural diagram of a switch according to Embodiment 2 of the present invention.
  • FIG. 5 is a schematic diagram of AWG splitting according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of another switch according to Embodiment 2 of the present invention.
  • FIG. 7 is a schematic structural diagram of a data center network system including an extension arm switch according to Embodiment 2 of the present invention.
  • FIG. 8 is a schematic structural diagram of a switch according to Embodiment 3 of the present invention.
  • FIG. 9 is a flowchart of signal transmission in a data center network system according to Embodiment 3 of the present invention.
  • FIG. 10 is a schematic structural diagram of a signal transmission system according to Embodiment 6 of the present invention.
  • FIG. 11 is a schematic structural diagram of a POD in Embodiment 6 of the present invention.
  • FIG. 12 is a schematic structural diagram of a ZONE according to Embodiment 6 of the present invention.
  • FIG. 13a is a schematic diagram of horizontal expansion of multiple ZONEs according to Embodiment 6 of the present invention.
  • FIG. 13b is a schematic diagram of multiple ZONE vertical expansions according to Embodiment 6 of the present invention.
  • the data center network system adopts a star network topology structure, and the star network topology is centered on the hub device, and each hub is There is a communication connection between the device and at least two switches.
  • at least one of the at least two switches has a communication connection with at least one server.
  • each switch has a hub device that has a communication connection with itself, and the hub device and the switch form a star network topology structure, and the star network topology does not need to be in each of the star network topologies.
  • Switch setting A physical connection channel is established between the devices, and less wiring is provided between the devices, thereby effectively reducing the number of network cabling and reducing the workload of subsequent network maintenance; and, compared with the current three-layer network architecture, the source server sends All the signals to the destination server need to be forwarded by the aggregation layer device and the core layer device.
  • the signal output by the source server sequentially passes through the source switch and the hub device that are in communication with the source server. And the destination switch that has a communication connection with the destination server, and then reaches the destination server, and all the signals are forwarded only through the hub device.
  • the signal forwarding level is less, thereby facilitating the network of the data center network system.
  • the flattening structure reduces the energy consumption caused by the core layer device and the aggregation layer device, and effectively reduces the system energy consumption and the equipment maintenance cost.
  • the data center network system further includes a color light module, and the color light module will be the server.
  • the electrical signal sent to the switch is converted into light Therefore, the optical signal is transmitted between the hub device and the color light module.
  • the optical signal has the advantages of high transmission reliability, fast transmission speed, and large amount of transmitted data. Therefore, the data center network system of the embodiment of the present invention can carry The larger the amount of data, and the reliability and transmission efficiency of signal transmission.
  • the data center network system includes a hub device 20, at least two switches 21, multiple color light modules 22, and at least two multiplexers/demultiplexers. 23, and at least two servers 24, wherein:
  • At least one switch of the at least two switches 21 has a communication connection with at least one server 24, and different input/output ports of each switch 21 have a communication connection with different color light modules 22;
  • Different color light modules 22 having communication connections with different input/output ports of each switch 21 are in communication connection with a multiplexer/demultiplexer 23, wherein different switches 21 are combined with different multiplexers by the color light module 22. / splitter 23 communication connection;
  • the at least two switches 21 form a star network topology with the one hub device 20 through the multiplexer/demultiplexer 23, and the hub device 20 respectively passes different ports through different ports. / splitter 23 communication connection;
  • the switch 21 is configured to receive at least two electrical signals, and process each of the at least two electrical signals according to the following processing manner for the first electrical signal: determining and the first electrical circuit An input/output port corresponding to the destination address carried in the signal, where the first electrical signal is output through the determined input/output port; wherein the destination address is used to indicate a destination server, corresponding to the destination address
  • the input/output port refers to an input/output port corresponding to the destination switch communicatively connected to the destination server, and the destination server is one of the at least two servers 24, and the destination switch is The destination server is communicatively connected to the switch;
  • the at least two electrical signals comprise any one or combination of the following: an electrical signal sent by the server 24 having a communication connection with the switch, and from other switches of the at least two switches 21. electric signal;
  • the color light module 22 is configured to receive an electrical signal output by an input/output port of the switch 21 that is in communication connection with itself, and convert the received electrical signal into an optical signal of a specific wavelength, where The wavelengths of the optical signals converted by the different color light modules 22 of the different input/output ports of the switch 21 are different;
  • the multiplexer/demultiplexer 23 is configured to receive a plurality of optical signals respectively sent by the plurality of color light modules 22 that are in communication connection with the plurality of optical signals, and to wavelength-multiplex the plurality of optical signals into a combined signal;
  • the hub device 20 is configured to receive a combined signal sent by the multiplexer/demultiplexer 23, and demultiplex the combined signal to obtain a plurality of optical signals; and send the multiple optical signals separately a port corresponding to a destination switch of each of the optical signals, and outputting each of the optical signals from the corresponding port, and wavelength-multiplexing the optical signals output from the same port into a combined signal;
  • the multiplexer/demultiplexer 23 is further configured to receive a combined signal from the hub device 20, and demultiplex the combined signal to obtain a plurality of optical signals, and input the plurality of optical signals separately a color light module 22 corresponding to the wavelength of the optical signal;
  • the color light module 22 is further configured to receive an optical signal from the multiplexer/demultiplexer 23, and convert the optical signal into an electrical signal and output the input/output to the switch 21 that is in communication connection with itself.
  • the switch 21 is further configured to forward an electrical signal received from the color light module 22 to a destination server of the electrical signal.
  • the data center network system further includes a Software Defined Network (SDN) controller 25, and the SDN controller 25 has a communication connection with each switch 21 in the system:
  • SDN Software Defined Network
  • the switch 21 is further configured to receive at least one electrical signal, and process each of the at least one electrical signal according to the following processing manner for the second electrical signal: determining and the second electrical signal
  • the input/output port corresponding to the destination address carried in the middle sends a load overload notification to the SDN controller 25 when the load of the input/output port corresponding to the destination address carried in the second electrical signal is overloaded;
  • the SDN controller 25 is configured to: in addition to the input corresponding to the destination address of the second electrical signal, in each input/output port of the switch 21 that sends the notification when receiving the notification sent by the switch 21 Selecting at least one input/output port from other input/output ports other than the output port, and feeding back the selected at least one input/output port to the switch 21 that sends the notification;
  • the switch that sends the notification to the SDN controller 25 is further configured to output the received at least one electrical signal through at least one input/output port fed back by the SDN controller.
  • the at least one input/output port selected by the SDN controller 25 is at least one input/output port with the smallest amount of load in the input/output port of the switch 21 that sends the notification.
  • the SDN controller 25 according to the load balancing principle, in addition to the input/output port corresponding to the destination address of the second road electrical signal, in each input/output port of the switch that sends the notification Select at least one input/output port in the input/output port.
  • the SDN controller schedules signals according to the load status of each port of each switch, so that each switch has its own Port load balancing, avoiding some ports Congestion, low signal transmission efficiency.
  • At least one of the plurality of color light modules 22 is located inside the switch 21 that is in communication connection with itself.
  • the multiplexer/demultiplexer 23 is located inside the switch 21 that is in communication connection with itself.
  • the server 24 establishes a communication connection with the switch 21 by using a wireless manner, or the server 24 establishes a communication connection with the switch 21 by using a wired cable;
  • the switch 21 and the switch A color communication module 22 establishes a communication connection by using a wireless connection, or the switch 21 and the color light module 22 establish a communication connection by using a wired cable;
  • the color light module 22 and the combining/demultiplexing The communication connection is established wirelessly between the devices 23, or the color light module 22 and the multiplexer/demultiplexer 23 establish a communication connection through the optical fiber;
  • the multiplexer/demultiplexer 23 and the hub device 20 A communication connection is established wirelessly between them, or the multiplexer/demultiplexer 23 and the hub device 20 establish a communication connection through an optical fiber.
  • the hub device 20 is an Array Waveguide Grating (AWG).
  • AMG Array Waveguide Grating
  • the data center network system of the embodiment of the present invention can form a schematic diagram of the logical connection structure shown in FIG. 2b, and the data center network system can logically Implement a mesh connection.
  • the data center network system includes a source server, a source switch, a hub device, a destination switch, and a destination server, and the source server and the plurality of color light modules.
  • There is a communication connection and all the color light modules are in communication connection with a multiplexer/demultiplexer (hereinafter referred to as a source multiplexer/demultiplexer), and the destination server also has a communication connection with a plurality of color light modules, all colors
  • the optical module is in communication with a multiplexer/demultiplexer (hereinafter referred to as the destination multiplexer/demultiplexer), and the source server and the source switch have a communication connection, and the destination server and the destination switch have a communication connection, and the source multiplexes / splitter and destination multiplexer/demultiplexer
  • the multi-channel signal transmission process in the embodiment of the present invention is described in detail by taking an optical fiber accessing the hub device as an example.
  • the source server and the destination server are relative concepts, that is, the server that generates the signal is the source server, and the server that receives the signal is the destination server, and any server can be either the source server or the destination server, for example, server A.
  • a signal transmission process in a data center network system includes:
  • Step 300 The source switch receives at least two electrical signals, and processes each of the at least two signals according to the following processing manner for the first electrical signal: determining and carrying the first electrical signal.
  • the input/output port corresponding to the destination address, and the first electrical signal is output through the determined input/output port.
  • FIG. 4 it is a schematic structural diagram of a switch in an embodiment of the present invention.
  • One end of the source switch includes multiple downlink ports, each of which is connected to a different source server, and the other end has multiple input/output ports, and each input/output port is connected to a different color light module.
  • the at least two electrical signals received by the source switch include any one or a combination of the following: an electrical signal sent by a source server that has a communication connection with the source switch, and an electrical resource from another switch. signal.
  • the at least two electrical signals sent by the source server that are in communication connection with the source switch include: the number of the source servers is one, and the source server generates at least two electrical signals that are sent to the at least two destination servers according to service requirements; for example, The source server generates two electrical signals, which are electrical signal 1, and electrical signal 2, the destination server corresponding to the electrical signal 1 is the server 1, the destination server corresponding to the electrical signal 2 is the server 2, and the electrical signal 1 and the electrical signal 2 correspond to The destination server is different, and the source switch receives the signal 1 and the signal 2 sent by the source server.
  • the method further includes: the number of the source servers is multiple, and each source service The server generates at least two electrical signals sent to the destination server according to the service requirements; for example, the source server A generates the electrical signal 1, the source server B generates the electrical signal 2, and the destination server corresponding to the electrical signal 1 and the electrical signal 2 can The same or different, the source switch receives signal 1 and signal 2.
  • the signal sent by the source server may be an optical signal or an electrical signal. If the signal sent by the source server is an optical signal, since the switch does not have the capability of processing the optical signal, a photoelectric conversion device needs to be disposed between the source server and the source switch or inside the source switch.
  • the photoelectric conversion device has a communication connection with the source server and the source switch, respectively, for converting an optical signal sent by the source server into an electrical signal, and transmitting the converted electrical signal to the Source switch.
  • the source switch is a Top of Rack (TOR), and the first switch is a three-layer Ethernet switch; the downstream port of the source switch can be converted by SFP+/XFP 10GE.
  • the 10GE photoelectric conversion port includes a 10GE LAN optical module, and the 10GE LAN optical module outputs a 850 nm multimode optical signal; the input/output port of the source switch may include a 10GE LAN optical module or 10GE LAN electrical module.
  • the number of input/output ports of the source switch is related to the number of switches and the interconnect bandwidth in the data center network system in a specific application scenario, that is, the number of switches in the data center network system, the input/output ports.
  • the number of input/output ports of each TOR is: n(N-1)+mM; for example, 24 TORs, 3 extended arm switches, and any TOR A 10G link is used between the other TORs and any TOR and expansion arm switches.
  • the source switch includes a routing policy, where the routing policy includes a mapping relationship between the input/output port and the destination address segment.
  • the routing policy includes a mapping relationship between the input/output port and the destination address segment.
  • the source switch may include an optical path selection controller, and the optical path selection controller outputs the received electrical signal to all input/output ports according to the routing policy.
  • the source switch further needs to determine whether there is an electrical signal transmitted to the server that is in communication connection with the at least two electrical signals; if yes, directly pass through the An input/output port on the source switch corresponding to the destination address carried in the electrical signal forwards the electrical signal to a destination server that is in communication connection with itself; otherwise, performing the routing of the electrical signal according to the routing
  • the policy selected input/output port sends the electrical signal to the color light module in communication with the selected input/output port.
  • the source switch when the routing policy included in the source switch does not include an input/output port corresponding to the destination address, the source switch separately sends all the input/output ports according to the destination address carried in the electrical signal. Sending a broadcast message, using an Transmission Control Protocol (TCP)/Internet Protocol (IP) protocol to obtain an input/output port of the feedback response message, and inputting/outputting the input/output port of the feedback response message.
  • TCP Transmission Control Protocol
  • IP Internet Protocol
  • the mapping relationship between the destination addresses carried in the electrical signals is saved in the routing policy; and the source switch sends the electrical signals to the color communication terminal through the input/output port of the feedback response message.
  • Optical module Optical module.
  • the source server when the routing policy included in the source server does not include the destination address carried in the electrical signal, the source server can obtain the input/output port corresponding to the destination address through the TCP/IP protocol, thereby ensuring the electrical signal. Reliable transmission improves the efficiency of electrical signal transmission.
  • Step 310 The color light module that is in communication connection with the source switch receives the signal sent by the source switch, and converts the received electrical signal into an optical signal of a specific wavelength and outputs the signal to the source multiplexer/demultiplexer.
  • each input/output port of the source switch is shown in FIG.
  • Each of the color light modules is respectively configured to convert the received electrical signals into optical signals of different wavelengths.
  • the wavelength of the optical signal that can be processed by each color light module is pre-configured according to the network deployment when the data center network system is created.
  • the color light module is a 10GE color light module, and the 10GE color light module color light module outputs a single mode optical signal of 1310 nm or 1550 nm.
  • the source switch sends the received electrical signals containing different destination addresses to different input/output ports respectively, because the wavelength of the optical signal that can be processed by the color light module connected to each input/output port is different. Therefore, the multi-channel electrical signal is converted into optical signals of different wavelengths, and the different electrical signals are distinguished by the wavelength, so that the subsequent hub device can identify the destination switch to which the optical signal is sent according to the wavelength of the optical signal.
  • Step 320 The source multiplexer/demultiplexer multiplexes the received optical signals into a combined signal and transmits the combined signal to the hub device.
  • the source multiplexer/demultiplexer has a wavelength division multiplexing function and a demultiplexing and multiplexing function, and the source multiplexer/demultiplexer can receive the light generated by all the color light modules that are in communication connection with the self. a signal, and the received optical signals are physically combined into a combined signal, which is output to the color optical port; wherein the combined signal includes optical signals of respective wavelengths sent by the respective color light modules; A source multiplexer/demultiplexer transmits the combined signal to the hub device through an optical fiber between the source multiplexer/demultiplexer and the hub device.
  • the multi-channel electrical signal sent by the switch is converted into an optical signal, and the converted optical signal is transmitted to the hub device through an optical fiber, thereby ensuring the reliability of the electrical signal transmitted by the switch, and With large capacity, the transmission of signals between the switch and the hub device can be satisfied by only one optical fiber. Therefore, compared with the cable transmission signal, the transmission of electrical signals through the optical fiber can effectively reduce the data center network system. The amount of wiring.
  • Step 330 The hub device receives a combined signal sent by the source multiplexer/demultiplexer, and demultiplexes the combined signal to obtain a plurality of optical signals; and sends the multiple optical signals to and And corresponding to the port of the destination switch of each optical signal, and outputting each of the optical signals from the corresponding port, and wavelength division multiplexing the optical signals output from the same port into a combined signal.
  • the hub device receives a combined signal sent by the source multiplexer/demultiplexer through the color optical port through one port of the hub device, and each port of the hub device includes a pre-established mapping relationship.
  • the mapping relationship includes the correspondence between the wavelengths and the ports.
  • Each of the ports has different mapping relationships.
  • the mapping is pre-configured according to the network deployment.
  • the hub device will be configured.
  • the combining signal is demultiplexed to obtain a plurality of optical signals.
  • the hub device For each optical signal, the hub device performs the following operations: searching for a mapping relationship included in the port according to the wavelength of the optical signal, Searching for a port corresponding to the wavelength of the optical signal in the mapping relationship, and transmitting the optical signal to the searched port; sending the optical signal through the searched port; when the found port is When a plurality of optical signals are included, the hub device first wavelength-multiplexes all optical signals included in the found port. , generating a combined signal, and then transmitting the combined signal.
  • the AWG searches for a corresponding port for each optical signal according to the wavelength of the different optical signals.
  • the AWG uses the wavelength of all optical signals input by the source switch as an input matrix (the number of rows is 1, the number of columns is N, and each element in the matrix is one The wavelength of the optical signal).
  • the optical signal at the port is processed by the AWG, and the transposed matrix of the input matrix is generated.
  • N the number of rows
  • the transposed matrix is the wavelength of an optical signal
  • the transposed matrix is the output matrix of port a1
  • each element in the output matrix corresponds to one a port (b1 to bn)
  • the optical signal at the port is subjected to the AWG demultiplexing process to generate the transposed of the input matrix a matrix, and moving the elements in the transposed matrix downward by one bit to generate an output matrix, each element in the output matrix corresponding to a port (b1 to bn); and so on, the AWG for the AWG An port, after the an port receives the plurality of optical signals, after the optical signal at the port is processed
  • Each one yuan a matrix The primes correspond to one port (b1 to bn).
  • the ports a1 to an, b1 to bn may be input ports for receiving optical signals sent by the switch, or may be output ports for transmitting optical signals to the switch.
  • the AWG can transmit the received optical signals of different wavelengths to each switch in the data center network system, thereby logically achieving full network coverage; and, since the AWG is an optical device, the optical device The performance is far superior to the electrical device. Therefore, the AWG realizes the two-two interconnection of the switches in the data center network system, and can also solve the power consumption and maintenance of the network equipment brought by the multi-level network in the prior art. Difficult problem.
  • Step 340 The destination multiplexer/demultiplexer receives the combined signal of the hub device, and demultiplexes the combined signal to obtain a plurality of optical signals, and inputs the plurality of optical signals into the A color light module corresponding to the wavelength of the optical signal.
  • the destination multiplexer/demultiplexer receives the combined signal sent by the hub device through an optical fiber between the hub device and the hub device, and demultiplexes the combined signal to obtain multiple An optical signal; the destination multiplexer/demultiplexer performs the following operations for each of the obtained optical signals: the destination multiplexer/demultiplexer includes a mapping relationship between the wavelength and the color light module; The splitter searches for a color light module that is in a mapping relationship with the wavelength of the optical signal, and sends the optical signal to the searched color light module.
  • the multiplexer/demultiplexer receives the combined signal of multiple signals transmitted by the hub device through one optical fiber, and can effectively reduce the data center network system by transmitting the electrical signal through the optical fiber compared with the cable transmission signal.
  • the amount of wiring is the amount of wiring.
  • the destination multiplexer/demultiplexer can simultaneously transmit optical signals to multiple color light modules. For example, after the destination multiplexer/demultiplexer demultiplexes the combined signal, it obtains signal 1, signal 2 and signal 3.
  • the wavelength of signal 1 is wavelength 1, the wavelength of signal 2 is wavelength 2, and the wavelength of signal 3 is wavelength. 3;
  • the destination multiplexer/demultiplexer determines that the color light module corresponding to the wavelength 1 is the color light module 2, the color light module corresponding to the wavelength 2 is the color light module 3, and the color corresponding to the wavelength 3
  • the optical module is a color light module 1. Based on this, the destination multiplexer/demultiplexer sends the signal 1 to the color light module 2, the signal 2 to the color light module 3, and the signal 3 to the color light module 1.
  • Step 350 The color light module that is in communication connection with the destination multiplexer/demultiplexer converts the optical signal sent by the destination multiplexer/demultiplexer into an electrical signal and outputs the signal to the destination switch that has a communication connection with itself. Input/output port.
  • each color light module that is in communication connection with the destination multiplexer/demultiplexer receives the optical signal sent by the destination multiplexer/demultiplexer, the following operations are performed:
  • the optical signal is converted to an electrical signal and transmitted to an input/output port of a destination switch in communication with the color light module.
  • the color light module is a 10GE color light module, and the 10GE color light module color light module outputs a single mode optical signal of 1310 nm or 1550 nm.
  • Step 360 The destination switch acquires a destination address carried in the received electrical signal, and sends the electrical signal to the destination switch indicated by the destination address.
  • one end of the destination switch includes multiple downlink ports, each of which is connected to a different destination server, and the other end includes multiple input/output ports, and each input/output port is connected.
  • Different color light modules are possible.
  • the destination switch can determine the connection of the destination address according to the destination address carried in each electrical signal after receiving the electrical signal sent by the color optical module from the input/output port. And indicating the downlink port of the destination server; the destination switch transmits the electrical signal to the corresponding destination server by using the determined downlink port.
  • the signal that the destination server can receive is an optical signal or an electrical signal. If the signal received by the destination server is an optical signal, since the conventional switch does not have the capability of processing the optical signal, the photoelectric conversion device needs to be disposed between the destination server and the destination switch or inside the destination switch.
  • the photoelectric conversion device has a communication connection with the destination server and the destination switch, and is configured to convert an electrical signal sent by the destination switch into an optical signal, and send the converted optical signal to the optical signal. Describe the server.
  • the downlink port of the destination switch is the same as the downlink port of the source switch, and the method for determining the number of input/output ports of the destination switch is the same as the method for determining the number of input and output ports of the source switch, where the destination switch is
  • the internal structure is the same as the internal structure of the source switch. Said.
  • the source switch is a traditional Ethernet switch.
  • the source server accesses the source switch through traditional Ethernet technology.
  • the source switch completes 24 input to 26 channels according to the saved routing policy.
  • the electrical cross-change of the output wherein the source switch includes 24 downlink ports connected to the source server, and 26 input/output ports are connected to the color light module, and the input/output ports are more than the ports of the source switch connected to the source server.
  • the output port can be connected to the extension arm switch; the electrical signal outputted by the 26 input/output ports is converted into an optical signal by the color optical module, and the wavelength modulation process of the optical signal is completed by the multiplexer/demultiplexer, and The combined signal obtained after the wavelength modulation is concentrated to a port of the source multiplexer/demultiplexer multiplexed to one fiber and output to the hub device; in contrast, the destination multiplexer/demultiplexer receives the connection sent by the hub device.
  • the combined signal includes optical signals of a plurality of wavelengths
  • the combined signal demultiplexes the combined signal by a destination combining/demultiplexing device Generating optical signals of different wavelengths, and respectively outputting each optical signal to a color light module capable of processing the optical signal of the wavelength according to the wavelength of each optical signal, and converting the optical signal into electricity through different color light modules.
  • the signal is output to the destination switch, and the destination switch transmits the electrical signal to the corresponding destination server according to the destination address carried in the electrical signal.
  • the source switch and the destination switch are both traditional Ethernet switches.
  • the source server accesses the source switch through traditional Ethernet technology.
  • the source switch completes 64 channels according to its saved routing policy.
  • the electrical cross-conversion is input to the 64-channel output, wherein the source switch includes 64 downlink ports connected to the source server, and 64 input/output ports are connected to the color light module; in this application scenario, the signal transmission process is shown in FIG.
  • the application scenarios are similar and will not be described here.
  • the star network topology centered on a hub device constitutes a CELL
  • the CELL can correspond to a service partition, a delivery unit, or a system cluster in the actual service.
  • a network system may include multiple CELLs, and each CELL is connected through an extension arm switch. Therefore, as shown in FIG. 7, the CELL in the embodiment of the present invention further includes an extension arm switch for connecting the CELL and other CELLs, and the form of the extension arm switch is consistent with the TOR, but the extension arm switch has no distinction between the uplink and the downlink port. , all ports Both are used for interconnection between different CELLs.
  • the data center network system consists of 24 TORs and 3 extension arm switches.
  • Each TOR and extension arm switch are configured with corresponding wavelengths; each TOR passes 27 wavelengths and another 23 units.
  • TOR and 3 extension arm switches form a network layer connection, each wavelength carrying 10GB of bandwidth; at the link layer, 23 input/output ports in each TOR are interconnected with other TORs, and 3 input/output ports and extension arms
  • the switch is interconnected; and at the link layer, the downlink port of each TOR is 24 10GE ports, and each TOR is connected to 24 servers, that is, each server is connected to a 10GE downlink port of the TOR; and, at the link layer
  • Each expansion arm switch contains a total of 52 10GE ports, of which 26 ports are connected to the CELL, and the remaining 26 ports are interconnected with other adjacent CELLs.
  • the multiplexer/demultiplexer and the color light module can be directly added between the Ethernet switch and the hub device, thereby reducing the equipment transformation cost;
  • the multiplexer/demultiplexer Through the multiplexer/demultiplexer, the optical signals of multiple wavelengths are transmitted through one optical fiber, which greatly reduces the number of wirings in the data center network system, and reduces the operation and maintenance difficulty of the data center network system; in addition, when the hub device is an AWG
  • the AWGs, switches, and servers that make up the data center network system are small network devices.
  • the data center network includes a source server, a source switch, a hub device, a destination switch, and a destination server.
  • the source server is used. a plurality of color light modules and a source multiplexer/demultiplexer, wherein all the color light modules are in communication connection with the source multiplexer/demultiplexer, and the destination server also includes a plurality of color light modules having a communication connection and a destination multiplexer/demultiplexer, all color light modules are in communication connection with the destination multiplexer/demultiplexer, and the source server and the source switch have communication links
  • the destination server and the destination switch have a communication connection, and the source multiplexer/demultiplexer in the source switch and the multiplexer/demultiplexer in the destination switch are connected to the hub device through a single fiber.
  • the multiplex signal transmission process in the embodiment of the present invention.
  • the source server and the destination server are relative concepts, that is, the server that generates the signal is the source server, and the server that receives the signal is the destination server, and any server can be either the source server or the destination server.
  • the signal transmission process in the data center network system includes:
  • Step 900 The source switch receives at least two electrical signals, and processes each of the at least two signals according to the following processing manner for the first electrical signal: determining and carrying the first electrical signal.
  • the input/output port corresponding to the destination address, the first road electrical signal is output through the determined input/output port; and the electrical signal received by the source switch is converted by the color light module in the source switch An optical signal of a specific wavelength; the optical signal converted by the color light module is wavelength-multiplexed into a combined signal by the source multiplexer/demultiplexer in the source switch, and the combined signal is The signal is sent to the hub device.
  • FIG. 8 is a schematic structural diagram of a switch according to an embodiment of the present invention.
  • One end of the source switch includes multiple downlink ports, each of which is connected to a different source server.
  • the source switch also includes multiple input/output ports, and each input/output port is connected to a different color optical module.
  • the at least two electrical signals received by the source switch include any one or a combination of multiple conditions: an electrical signal sent by a source server that has a communication connection with the source switch, and an electrical signal from another switch. .
  • the at least two electrical signals sent by the source server that are in communication connection with the source switch include: the number of the source servers is one, and the source server generates at least two electrical signals that are sent to the at least two destination servers according to service requirements; or The number of source servers is multiple, and each source server generates at least two electrical signals sent to the destination server according to service requirements.
  • the signal sent by the source server may be an optical signal or an electrical signal. If the signal sent by the source server is an optical signal, since the switch does not have the capability of processing the optical signal, Therefore, between the source server and the source switch, or inside the source switch, there is also a need to provide a photoelectric conversion device, and the photoelectric conversion device respectively has a communication connection with the source server and the source switch, and is used for Converting the optical signal sent by the source server into an electrical signal, and transmitting the converted electrical signal to the source switch.
  • the internal structure of the source switch, the configuration of the downlink port, and the method for determining the number of the input/output ports are the same as those of the source switch in the second embodiment, and details are not described herein again.
  • the source switch internally includes a routing policy, and the source switch acquires an input/output port corresponding to the electrical signal according to the routing policy, and the specific process is determined by the source switch in the second embodiment.
  • the input/output ports of the signals are the same in the same manner and will not be described here.
  • the manner in which the source switch acquires the input/output port corresponding to the electrical signal is the same as the embodiment.
  • the source switch obtains the same manner of the input/output port corresponding to the electrical signal in the scenario that the routing policy does not include the input/output port corresponding to the destination address, and details are not described herein.
  • the source switch may include an optical path selection controller for outputting the received electrical signal to its corresponding input/output port according to the routing policy.
  • the source switch further needs to determine whether there is an electrical signal transmitted to the server that is in communication connection with the at least two electrical signals, and the processing procedure and the second embodiment The source switch in the process of processing electrical signals is the same, and will not be described here.
  • each color light module in the source switch is capable of converting the received electrical signal into optical signals of different wavelengths, respectively.
  • the wavelength of the optical signal that can be processed by each color light module is pre-configured according to the network deployment when the data center network system is created.
  • the color light module is a 10GE color light module, and the 10GE color light module color light module outputs a single mode optical signal of 1310 nm or 1550 nm.
  • the function of the source multiplexer/demultiplexer and the manner of processing the optical signal are the same as those of the source multiplexer/demultiplexer in the second embodiment, and are not described herein again.
  • Step 910 The hub device receives a combined signal sent by the source multiplexer/demultiplexer, and demultiplexes the combined signal to obtain a plurality of optical signals; and sends the multiple optical signals to and of A port corresponding to the destination switch of each optical signal, and outputting each of the optical signals from the corresponding port, and wavelength division multiplexing the optical signals output from the same port into a combined signal.
  • the hub device receives the combined signal, the processing manner of the combined signal, and the output manner of the combined signal are the same as the way in which the hub device transmits the combined signal in the second embodiment, where No longer.
  • Step 920 The destination multiplexer/demultiplexer in the destination switch receives the combined signal of the hub device, and demultiplexes the combined signal to obtain multiple optical signals, and the multiple lights are The signal is respectively input to the color light module in the destination switch corresponding to the wavelength of the optical signal; the optical signal sent by the destination multiplexer/demultiplexer is converted into an electrical signal by the color light module in the destination switch And outputting to the input/output port of the destination switch that is in communication connection with the self; the destination switch acquires the destination address carried in the received electrical signal, and sends the electrical signal to the destination switch indicated by the destination address .
  • the destination multiplexer/demultiplexer receives the combined signal sent by the hub device through an optical fiber between the hub device and the hub device, and demultiplexes the combined signal to obtain multiple An optical signal; the destination multiplexer/demultiplexer performs the following operations for each of the obtained optical signals: the destination multiplexer/demultiplexer includes a mapping relationship between the wavelength and the color light module; The splitter searches for a color light module that is in a mapping relationship with the wavelength of the optical signal, and sends the optical signal to the searched color light module.
  • the color light module is a 10GE color light module, and the 10GE color light module color light module outputs a single mode optical signal of 1310 nm or 1550 nm.
  • the structure and function of the destination switch are the same as those of the source switch, and are not described herein again.
  • the source switch and the destination switch are both traditional Ethernet switches.
  • the source server accesses the source switch through traditional Ethernet technology.
  • the source switch completes 24 channels according to its own routing policy.
  • the electrical cross-conversion is input to the 26-way output, wherein the source switch includes 24 downlink ports connected to the source server, and 26 input/output ports are connected to the color light module, and the input/output port is connected to the source server compared to the source switch.
  • the port of the port can be connected Connect to the extension arm switch.
  • a 10G direct link may exist between any two TORs; the TOR and the extended arm switch, and the extended arm switch and the extended arm switch may exist.
  • the port connected to the hub device in the TOR is presented as a 10GE port in the Media Access Control (MAC), corresponding to a 10G interconnection link between one switch;
  • the 10GE port will be cross-mapped to an optical path with a wavelength of ⁇ i and a rate of 10G; and the port connecting the hub device and the port of the extension arm switch in the TOR are wavelength division multiplexed ports, and the port carries N Optical signals having wavelengths of ⁇ 1 ⁇ 2 ⁇ 3 ... ⁇ N , each wavelength corresponding to a 10G link between one switch.
  • the source switch and the destination switch are both traditional Ethernet switches.
  • the source server accesses the source switch through traditional Ethernet technology.
  • the source switch completes 64 input to 64 output according to the saved routing policy.
  • the electrical cross-change wherein the source switch includes 64 downlink ports connected to the source server, and 64 input/output ports are connected to the color light module.
  • the 32 downlink ports can be configured as 24 10GE ports and 2 40GE ports; 32 internal ports can be configured as needed. If 26 optical signals are required, only 26 color light modules are inserted.
  • the wavelength division multiplexing technology and the Ethernet switch technology are organically combined to realize optical fiber virtualization, greatly reducing the number of wiring of the data center network system, and reducing the operation and maintenance difficulty of the data center network system;
  • the hub device is an AWG
  • the AWG, the switch, and the server are small network devices.
  • the interconnection between many small devices that are peer-to-peer, distributed, and indiscriminate is formed, and each switch in the data center network system is constructed.
  • the full connection between the two the realization of a centralized new data center network architecture, without the need to use core layer equipment and aggregation layer equipment, reducing the construction cost and maintenance costs of the data center network.
  • the star network topology centered on a hub device constitutes a CELL
  • the CELL can correspond to a service partition, a delivery unit, or a system cluster in the actual service.
  • multiple CELLs may be included, and each CELL is connected by an extension arm switch. Therefore, as shown in FIG. 7, the CELL in the embodiment of the present invention further includes an extension arm switch for connecting the CELL and other CELLs, and the shape of the extension arm switch.
  • the state is consistent with TOR, but the extension arm switch has no distinction between uplink and downlink ports, and all ports are used for interconnection between different CELLs.
  • the data center network includes a source server, a source switch, a hub device, a destination switch, and a destination server, and the source server and the plurality of color light modules exist.
  • Communication connection all color light modules are in communication connection with a multiplexer/demultiplexer (hereinafter referred to as source multiplexer/demultiplexer), and the destination server also has communication connection with multiple color light modules, all color light
  • the modules are all in communication with a multiplexer/demultiplexer (hereinafter referred to as the destination multiplexer/demultiplexer), and the source server and the source switch have a communication connection, and the destination server and the destination switch have a communication connection, and the source multiplexes/
  • the splitter and the destination multiplexer/demultiplexer are both connected to the hub device through a single fiber, and the multiplex signal transmission process in the embodiment of the present invention is described in detail.
  • the source server and the destination server are relative concepts, that is, the server that generates the signal is the source server, and the server that receives the signal is the destination server, and any server can be either the source server or the destination server.
  • the source switch is a switchboard based on a frame server (hereinafter referred to as a source switch card), and the source server has a communication connection with the source switch by being plugged into the switchboard;
  • the destination server is a switch board of the box server (hereinafter referred to as a destination switch board), and the destination server has a communication connection with the destination switch by being plugged into the switch board.
  • the signal transmission process in the data center network system is the same as the signal transmission process in the second embodiment, and details are not described herein again.
  • the source switch may be a switch including a color light module and a source multiplexer/demultiplexer
  • the destination switch may also be a switch including a color light module and a destination multiplexer/demultiplexer, in this application scenario.
  • the signal transmission process in the data center network system is similar to that in the third embodiment, and details are not described herein again.
  • the star network topology centered on a hub device constitutes a CELL
  • the CELL can correspond to a service partition, a delivery unit, or a system cluster in the actual service.
  • multiple CELLs may be included, and each CELL is connected by an extension arm switch. Therefore, as shown in FIG. 7, the CELL in the embodiment of the present invention further includes an extension arm switch for connecting the CELL and other CELLs, and the form of the extension arm switch is consistent with the TOR, but the extension arm switch has no distinction between the uplink and the downlink port. All ports are used for interconnection between different CELLs.
  • the data center network includes a source server, a source switch, a hub device, a destination switch, and a destination server, and the source server and the plurality of color light modules exist.
  • Communication connection all color light modules are in communication connection with a multiplexer/demultiplexer (hereinafter referred to as source multiplexer/demultiplexer), and the destination server also has communication connection with multiple color light modules, all color light
  • the modules are all in communication with a multiplexer/demultiplexer (hereinafter referred to as the destination multiplexer/demultiplexer), and the source server and the source switch have a communication connection, and the destination server and the destination switch have a communication connection, and the source multiplexes/
  • the splitter and the destination multiplexer/demultiplexer are both connected to the hub device through a single fiber, and the multiplex signal transmission process in the embodiment of the present invention is described in detail.
  • the source server and the destination server are relative concepts, that is, the server that generates the signal is the source server, and the server that receives the signal is the destination server, and any server can be either the source server or the destination server.
  • the source switch is a switchboard based on a frame server (hereinafter referred to as a source switch card), and the source server has a communication connection with the source switch by being plugged into the switchboard;
  • the destination server is a switch board of the box server (hereinafter referred to as a destination switch board), and the destination server has a communication connection with the destination switch by being plugged into the switch board.
  • the source switch may be a switch including a color light module and a source multiplexer/demultiplexer
  • the destination switch may also be a switch including a color light module and a destination multiplexer/demultiplexer, in this application scenario.
  • the signal transmission process in the data center network system is similar to that in the third embodiment, and details are not described herein again.
  • the star network topology centered on a hub device constitutes a CELL
  • the CELL can correspond to a service partition, a delivery unit, or a system cluster in the actual service.
  • multiple CELLs may be included, and each CELL is connected by an extension arm switch. Therefore, as shown in FIG. 7, the CELL in the embodiment of the present invention further includes an extension arm switch for connecting the CELL and other CELLs, and the form of the extension arm switch is consistent with the TOR, but the extension arm switch has no distinction between the uplink and the downlink port. All ports are used for interconnection between different CELLs.
  • the data center network system of the first embodiment to the fifth embodiment includes only one hub device.
  • the hub device further includes an extension arm switch, and the extension arm switch is used to connect the hub device with the other device. Hub equipment.
  • a plurality of CELLs constitute a signal transmission system, and the signal transmission system includes at least two star network topologies, each of which includes a hub device 100 and at least two switches 110. a plurality of color light modules 120, at least two multiplexers/demultiplexers 130, and at least two servers 140, wherein the hub device 100 within the at least two star network topologies has a communication connection, wherein:
  • At least one of the at least two switches 110 has a communication connection with at least one server 140, and different input/output ports of each switch 110 and different color light modules 120 There is a communication connection;
  • Different color light modules 120 having communication connections with different input/output ports of each switch 110 are in communication connection with one multiplexer/demultiplexer 130, wherein different switches 110 pass The color light module 120 is communicatively coupled to different multiplexer/demultiplexer 130;
  • the at least two switches 110 respectively form a star network topology with the hub device 100 through a multiplexer/demultiplexer 130 that is in communication connection with itself, and the hub device 100 respectively communicates with different ports through different ports.
  • the wave/demultiplexer 130 is communicatively coupled; there is a communication connection between any one of the at least two hub devices 100 and the other at least one hub device;
  • the switch 110 in one of the star network topologies is configured to receive at least two electrical signals and for the at least two electrical signals Each of the electrical signals is processed according to the following processing manner for the first electrical signal: determining an input/output port corresponding to the destination address carried in the first electrical signal, and the determined input/output port is used to a first electrical signal output; wherein the destination address is used to indicate a destination server, and an input/output port corresponding to the destination address is an input/output port corresponding to a destination switch communicatively connected to the destination server,
  • the destination server is a server in another star network topology, and the destination switch is a switch that is in communication with the destination server;
  • the at least two electrical signals include any one or combination of the following: The electrical signal sent by the server connected to the communication, and the above from the same star network topology as the switch Electrical signals from other switches in the two switches, and electrical signals from switches that belong to different star network topologies than the switch;
  • a color light module 120 configured to receive an electrical signal output by an input/output port of the switch 110 that is in communication connection with itself, and convert the received electrical signal into an optical signal of a specific wavelength, wherein, with a switch
  • the wavelengths of the optical signals converted by the different color light modules 120 in which the different input/output ports have communication connections are different;
  • the multiplexer/demultiplexer 130 is configured to receive a plurality of optical signals respectively sent by the plurality of color light modules 120 that are in communication connection with the plurality of optical signals, and to wavelength-multiplex the plurality of optical signals into a combined signal;
  • the hub device 100 is configured to: receive a combined signal sent by the multiplexer/demultiplexer 130 in the same star network topology as the hub device 100, and/or located in a different star network with the hub device a combined signal sent by the hub device of the topology, and demultiplexing the combined signal to obtain a plurality of optical signals; respectively, transmitting the plurality of optical signals to each of the optical signals a port corresponding to the switch, and outputting each of the optical signals from the corresponding port, and wavelength-multiplexing the optical signals output from the same port into a combined signal, wherein at least the obtained plurality of optical signals are obtained
  • the destination switch of one optical signal is located in another star network topology, and the optical signal of the destination switch located in another star network topology is output through one port of the hub device and transmitted to another hub device;
  • the multiplexer/demultiplexer 130 is further configured to receive a combined signal from the hub device 100 that is in communication connection with itself, and demultiplex the combined signal to obtain a plurality of optical signals, and The plurality of optical signals are respectively input to the color light module 120 corresponding to the wavelength of the optical signal;
  • Each of the color light modules 120 is further configured to receive an optical signal from the multiplexer/demultiplexer 130 that is in communication connection with itself, and convert the optical signal into an electrical signal and output the communication to the self-existing communication.
  • the switch 110 is further configured to forward an electrical signal received from a color optical module that is in communication connection with the destination server 140 to the electrical signal.
  • system further includes an SDN controller 150 having a communication connection with each switch 110 in the system:
  • the switch 110 is further configured to receive at least one electrical signal, and process each of the at least one electrical signal according to the following processing manner for the second electrical signal: determining and the second electrical signal
  • the input/output port corresponding to the destination address carried in the middle sends a load overload notification to the SDN controller 150 when the load of the input/output port corresponding to the destination address carried in the second electrical signal is overloaded;
  • the SDN controller 150 is configured to, after receiving the notification sent by the switch 110, an input corresponding to a destination address of the second electrical signal in each input/output port of the switch 110 that sends the notification. Selecting at least one input/output port from other input/output ports other than the output port, and feeding back the selected at least one input/output port to the switch 110 that sends the notification;
  • the switch 110 that sends the notification to the SDN controller 150 is further configured to feed the received at least one electrical signal to the SDN controller 150 to the One less input/output port output.
  • the at least one input/output port selected by the SDN controller 150 is at least one input/output port having the smallest load amount in the input/output port of the switch that sends the notification.
  • the SDN controller 150 according to the load balancing principle, in addition to the input/output port corresponding to the destination address of the second electrical signal, in each input/output port of the switch that sends the notification Select at least one input/output port in the input/output port.
  • a network composed of multiple CELLs according to certain rules and topologies is called a Point of Deployment (POD), and a POD is larger than CELL.
  • POD Point of Deployment
  • a POD can be associated with an AZ ( Avilable ZONE), corresponding to a cloud cluster or a room module in a real-life scenario.
  • the POD comprises two forms, a standard POD and a non-standard POD.
  • the standard POD has the following three conditions: all the CELL structures that make up the POD, that is, the number of TORs of all CELLs, the number of extension arm switches, the number and bandwidth of ports of each TOR, the number of ports and bandwidth of the extension arm switch, and The TOR and the extension arm switch included in each CELL are connected in the same way; all CELLs are interconnected into a ring by the extension arm switch; for example, as shown in Figure 11, six CELLs form a POD: 24 TOR per CELL It is composed of three extension arm switches; each adjacent two CELLs are interconnected by an extension arm switch, or each adjacent two CELLs are interconnected by respective CELL extension arms; a total of six extension arms are required to be connected, and constitute one Ring.
  • the non-standard POD has the following characteristics: the networking mode of each CELL in the POD can be different; different CELLs are freely interconnected through the extended arm switches,
  • a network composed of a plurality of PODs according to certain rules and topologies is ZONE.
  • ZONE is a cellular architecture-cellular multi-POD interconnection networking. This networking mode is a standard networking scheme of ZONE. Among them, one ZONE is composed of 6 POD interconnections, and there are 2 CELL overlaps for each adjacent POD. Therefore, inside a ZONE, 24 CELLs are shared; the extended arm switch through the edge can be interconnected with a unit such as a network outlet.
  • a plurality of ZONEs can be interconnected by horizontal expansion, wherein horizontal expansion can be implemented by an extended arm switch; as shown in FIG. 13b, multiple ZONEs can also be interconnected by vertical expansion, wherein vertical expansion can be extended by an extension arm
  • the switch can be implemented.
  • multiple ZONEs can be interconnected in a freely extended manner. That is, the mode is not extended according to the above standards. Any network and networking are not limited. The topology is not limited. You can set the arbitrarily according to the specific application scenario.
  • the peer-to-peer small device is used to realize the whole network connection, and the aggregation layer device and the core layer device are not needed, thereby effectively avoiding the network bottleneck; and the decentralized network structure also facilitates the expansion of the data center network and improves System availability.
  • the data center network system adopts a star network topology, and the star network topology is centered on the hub device, and each hub device has a communication connection with at least two switches.
  • each of the star network topologies at least one of the at least two switches has a communication connection with at least one of the servers.
  • each switch has a hub device that has a communication connection with itself, and the hub device and the switch form a star network topology structure, and the devices are routed between the devices in the star network topology structure compared to the mesh network topology structure.
  • the signal output by the source server sequentially passes through the source switch, the hub device, and the destination switch that has a communication connection with the destination server, and then reaches the destination.
  • the server all signals are forwarded only through the hub device.
  • the signal forwarding hierarchy is less, which facilitates the flattening of the network structure of the data center network system and reduces the core layer device and the aggregation layer device.
  • the data center network system further includes a color light module, which converts the electrical signal sent by the server to the switch into an optical signal, so that between the hub device and the color light module Only pass
  • the optical signal transmission system has the advantages of high transmission reliability, fast transmission speed, and large amount of transmission data. Therefore, the data center network system of the embodiment of the present invention can carry a larger amount of data and improve signal transmission. Reliability and transmission efficiency.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Abstract

本发明公开了一种数据中心网络系统及信号传输系统，每一个交换机均拥有与自身存在通信连接的枢纽设备，枢纽设备与交换机组成星状网络拓扑结构，相较于网状网络拓扑结构，星状网络拓扑结构中设备之间布线更少，因而能够有效降低网络布线数量，降低后续网络维护的工作量；并且，源服务器输出的信号依次通过与源服务器存在通信连接的源交换机，枢纽设备，以及与目的服务器存在通信连接的目的交换机，进而到达目的服务器，所有信号仅通过枢纽设备进行转发，信号转发的层级较少，从而有利于实现数据中心网络系统的网络结构扁平化，减少了核心层设备和汇聚层设备所造成的能耗，有效降低了系统能耗和设备维护成本。

Description

一种数据中心网络系统及信号传输系统
本申请要求在2015年11月30日提交中国专利局、申请号为201510859557.5、发明名称为“一种数据中心网络系统及信号传输系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，尤其涉及一种数据中心网络系统及信号传输系统。
背景技术
数据中心网络是应用于数据中心的网络，其主要由大量的二层接入设备及少量的三层设备组成。参阅图1所示，现有的数据中心网络为分级汇聚的层次型结构，通常包含接入层、汇聚层和核心层三个层次。
参阅图1所示，在分级汇聚的层次型结构中，当服务器1需要向服务器2发送信号时，由于服务器1和服务器2属于不同的接入层设备，因此服务器1对应的接入层设备1需要将所述信号发送至接入层设备1，接入层设备1需要将所述信号发送至汇聚层设备1；由于汇聚层设备1管辖服务器2所属的接入层设备2，因此，汇聚层设备1将所述信号发送至接入层设备2，并由接入层设备2将所述信号发送至服务器2。
由此可见，传统分级汇聚的层次型结构相当于树状结构，每一个服务器发送的信号均要经过汇聚层设备和/或核心层设备进行转发，随着日益增长的信号传输量的需求，会对汇聚层设备和核心层设备的性能要求越来越高，高性能的汇聚层设备和核心层设备将造成组网成本高，以及后续对设备维护困难的问题。
目前，通常采用去除传统数据中心网络中的汇聚层设备和核心层设备等设备方法，解决传统数据中心网络中存在的组网成本高，以及设备维护困难 的问题，即将汇聚分级层级架构改造为去中心化的网状架构，使每两台交换机之间均存在物理连接通路，当任意一服务器需要访问另一服务器时，仅通过该任意一服务器连接的交换机，和另一服务器连接的交换机之间的物理连接通路，即可进行通信。采用该技术方案，虽然解决了信号传输过程中汇聚层设备和核心层设备造成的传输瓶颈问题，达到了去中心化的目的，但是每两个交换机设备之间均需要直连通道的方案，存在布线数量庞大的问题。
由此可见，目前的数据中心网络存在布线数量庞大，维护困难的问题。
发明内容
本发明实施例提供一种数据中心网络系统及信号传输系统，用以解决传统数据中心网络中存在的布线数量庞大，维护困难的问题。
本发明实施例提供的具体技术方案如下：
第一方面，提供一种数据中心网络系统，包括一个枢纽设备，至少两个交换机，多个彩光模块，至少两个合波/分波器，以及至少两个服务器，其中：
所述至少两个交换机中的至少一个交换机与至少一个服务器存在通信连接，且每一个交换机的不同输入/输出端口与不同的彩光模块存在通信连接；
与每个交换机的不同输入/输出端口存在通信连接的不同彩光模块均与一个合波/分波器存在通信连接，其中，不同的交换机通过彩光模块与不同的合波/分波器通信连接；
所述至少两个交换机通过所述合波/分波器与所述一个枢纽设备构成星状网络拓扑结构，所述枢纽设备分别通过不同的端口与不同的合波/分波器通信连接；
所述交换机，用于接收至少两路电信号，并针对所述至少两路电信号中的每一路电信号分别按照下述针对第一路电信号的处理方式处理：确定与第一路电信号中携带的目的地址对应的输入/输出端口，通过所述确定的输入/输出端口将所述第一路电信号输出；其中，所述目的地址用于指示目的服务器，与所述目的地址对应的输入/输出端口是指与所述目的服务器通信连接的 目的交换机所对应的输入/输出端口，所述目的服务器为所述至少两个服务器中的一个服务器，所述目的交换机为与所述目的服务器通信连接的交换机；所述至少两路电信号包括以下任意一种或组合：与本交换机存在通信连接的服务器发送的电信号，以及，来自所述至少两个交换机中其他交换机的电信号；
所述彩光模块，用于接收与自身存在通信连接的所述交换机的输入/输出端口输出的电信号，并将接收的所述电信号转换为特定波长的光信号，其中，与一个交换机的不同输入/输出端口存在通信连接的不同的彩光模块转换的光信号的波长是不同的；
所述合波/分波器，用于接收与自身存在通信连接的多个彩光模块分别发送的多个光信号，并将所述多个光信号波分复用成合路信号；
所述枢纽设备，用于接收所述合波/分波器发送的合路信号，并将所述合路信号解复用，得到多个光信号；将所述多个光信号分别发送至与其中的每个光信号的目的交换机对应的端口，并将所述每个光信号从所述对应的端口输出，将从同一端口输出的光信号波分复用为合路信号；
所述合波/分波器，进一步用于接收来自枢纽设备的合路信号，并将所述合路信号解复用，得到多个光信号，并将所述多个光信号分别输入与所述光信号的波长对应的彩光模块；
所述彩光模块，进一步用于接收来自所述合波/分波器的光信号，并将所述光信号转换为电信号后输出给与自身存在通信连接的交换机的输入/输出端口；
所述交换机，进一步用于将从彩光模块接收到的电信号转发给所述电信号的目的服务器。
结合第一方面，在第一种可能的实现方式中，所述系统还包括SDN控制器，所述SDN控制器与系统中的每个交换机均存在通信连接：所述交换机，进一步用于接收至少一路电信号，并针对所述至少一路电信号中的每一路电信号分别按照下述针对第二路电信号的处理方式处理：确定与第二路电信号 中携带的目的地址对应的输入/输出端口，在与第二路电信号中携带的目的地址对应的输入/输出端口负载过载时，向所述SDN控制器发送负载过载的通知；所述SDN控制器，用于在接收到交换机发送的所述通知时，在发送所述通知的交换机的各个输入/输出端口中，除与第二路电信号的目的地址对应的输入/输出端口之外的其他输入/输出端口中选择至少一个输入/输出端口，并将选择的至少一个输入/输出端口反馈给所述发送所述通知的交换机；所述至少两个交换机中，向所述SDN控制器发送通知的交换机，进一步用于将接收的所述至少一路电信号通过所述SDN控制器反馈的至少一个输入/输出端口输出。
结合第一方面第一种可能的实现方式，在第二种可能的实现方式中，所述SDN控制器选择的至少一个输入/输出端口为所述发送所述通知的交换机的输入/输出端口中负载量最小的至少一个输入/输出端口。
结合第一方面第一种可能的实现方式，在第三种可能的实现方式中，所述SDN控制器按照负载均衡原则，在发送所述通知的交换机的各个输入/输出端口中，除与第二路电信号的目的地址对应的输入/输出端口之外的其他输入/输出端口中选择至少一个输入/输出端口。
采用上述技术方案，通过SDN控制器对数据中心网络系统中的拓扑和丢包状态等进行监控，由SDN控制器根据每一个交换机的各个端口的负载状态对信号进行调度，使每一个交换机的各个端口的负载均衡，避免了部分端口拥塞，信号发送效率低的问题。
结合第一方面，第一方面第一种可能的实现方式，第二种可能的实现方式，第三种可能的实现方式中的任一项，在第四种可能的实现方式中，所述多个彩光模块中至少有一个彩光模块位于与自身存在通信连接的交换机的内部。
结合第一方面，第一方面第一种可能的实现方式，第二种可能的实现方式，第三种可能的实现方式，第四种可能的实现方式中的任一项，在第五种可能的实现方式中，所述枢纽设备为阵列波导光栅AWG。
采用上述技术方案，通过AWG能够将接收到的不同波长的光信号传输至数据中心网络系统中的每一个交换机，从而在逻辑上实现了全网覆盖；并且，由于AWG为光学器件，光学器件的性能要远远优于电学器件，因此，通过AWG实现了数据中心网络系统中交换机两两互连的同时，还能够解决现有技术中多层次网络带来的网络设备功耗大，以及维修困难的问题。
结合第一方面，第一方面第一种可能的实现方式，第二种可能的实现方式，第三种可能的实现方式，第四种可能实现方式，第五种可能的实现方式中的任一项，在第六种可能的实现方式中，交换机在接收到所述至少两路电信号后，还用于：判断所述至少两路电信号中是否存在传输至与自身存在通信连接的服务器的电信号；若存在，则通过所述电信号的目的地址对应的所述交换机上的输入/输出端口将所述电信号转发至与自身存在通信连接的目的服务器；否则，执行将所述电信号通过所述电信号的目的地址对应的所述交换机上的输入/输出端口将所述电信号发送至与所述输入/输出端口存在通信连接的彩光模块的步骤。
结合第一方面，第一方面第一种可能的实现方式，第二种可能的实现方式，第三种可能的实现方式，第四种可能实现方式，第五种可能的实现方式，第六种可能实现的方式中的任一项，在第七种可能的实现方式中，当所述交换机中包含的选路策略中不包含目的地地址对应的输入/输出端口时，所述交换机还用于：根据所述电信号中携带的目的地址，向自身的所有输入/输出端口分别发送广播消息，采用传输控制协议TCP/互联协议IP协议获取反馈响应消息的输入/输出端口，将所述反馈响应消息的输入/输出端口以及所述电信号中携带的目的地址之间的映射关系保存至选路策略中；将所述电信号通过所述反馈响应消息的输入/输出端口发送至与自身存在通信连接的彩光模块。
采用上述技术方案，在交换机的选路策略中不包含电信号中携带的目的地址时，交换机能够通过TCP/IP协议获取该目的地址对应的输入/输出端口，从而保证了电信号的可靠传输，提高了电信号传输的效率。
第二方面，提供一种信号传输系统，包含至少两个星状网络拓扑结构,每 个所述星状网络拓扑结构包括一个枢纽设备，至少两个交换机，多个彩光模块，至少两个合波/分波器，以及至少两个服务器，所述至少两个星状网络拓扑结构内的枢纽设备存在通信连接，
其中，在一个所述星状网络拓扑结构内：所述至少两个交换机中的至少一个交换机与至少一个服务器存在通信连接，且每一个交换机的不同输入/输出端口与不同的彩光模块存在通信连接，与每个交换机的不同输入/输出端口存在通信连接的不同彩光模块均与一个合波/分波器存在通信连接，其中，不同的交换机通过彩光模块与不同的合波/分波器通信连接，所述至少两个交换机通过所述合波/分波器与所述一个枢纽设备构成星状网络拓扑结构，所述枢纽设备分别通过不同的端口与不同的合波/分波器通信连接；
在任意两个所述星状网络拓扑结构之间：其中一个所述星状网络拓扑结构内的所述交换机，用于接收至少两路电信号，并针对所述至少两路电信号中的每一路电信号分别按照下述针对第一路电信号的处理方式处理：确定与第一路电信号中携带的目的地址对应的输入/输出端口，通过所述确定的输入/输出端口将所述第一路电信号输出；其中，所述目的地址用于指示目的服务器，与所述目的地址对应的输入/输出端口是指与所述目的服务器通信连接的目的交换机所对应的输入/输出端口，所述目的服务器为另一个星状网络拓扑结构内的服务器，所述目的交换机为与所述目的服务器通信连接的交换机；所述至少两路电信号包括以下任意一种或组合：与本交换机存在通信连接的服务器发送的电信号，以及，来自与本交换机属于同一星状网络拓扑结构的所述至少两个交换机中其他交换机发来的电信号，以及来自与本交换机属于不同星状网络拓扑结构的交换机的电信号；
所述彩光模块，用于接收与自身存在通信连接的所述交换机的输入/输出端口输出的电信号，并将接收的所述电信号转换为特定波长的光信号，其中，与一个交换机的不同输入/输出端口存在通信连接的不同的彩光模块转换的光信号的波长是不同的；
所述合波/分波器，用于接收与自身存在通信连接的多个彩光模块分别发 送的多个光信号，并将所述多个光信号波分复用成合路信号；
所述枢纽设备，用于接收与所述枢纽设备位于同一星状网络拓扑结构的合波/分波器发送的合路信号，和/或，与所述枢纽设备位于不同星状网络拓扑结构的枢纽设备发送的合路信号，并将所述合路信号解复用，得到多个光信号；将所述多个光信号分别发送至与其中的每个光信号的目的交换机对应的端口，并将所述每个光信号从所述对应的端口输出，将从同一端口输出的光信号波分复用为合路信号，其中，得到的所述多个光信号中至少一个光信号的目的交换机位于另一个星状网络拓扑结构，所述目的交换机位于另一个星状网络拓扑结构的光信号通过所述枢纽设备的一个端口输出，并传输至另一个枢纽设备；
所述合波/分波器，进一步用于接收来自与自身存在通信连接的枢纽设备的合路信号，并将所述合路信号解复用，得到多个光信号，并将所述多个光信号分别输入与所述光信号的波长对应的彩光模块；
所述彩光模块，进一步用于接收来自与自身存在通信连接的所述合波/分波器的光信号，并将所述光信号转换为电信号后输出给与自身存在通信连接的交换机的输入/输出端口；
所述交换机，进一步用于将从与自身存在通信连接的彩光模块接收到的电信号转发给所述电信号的目的服务器。
结合第二方面，在第一种可能的实现方式中，所述系统还包括软件定义网络SDN控制器，所述SDN控制器与系统中的每个交换机均存在通信连接：所述交换机，进一步用于接收至少一路电信号，并针对所述至少一路电信号中的每一路电信号分别按照下述针对第二路电信号的处理方式处理：确定与第二路电信号中携带的目的地址对应的输入/输出端口，在与第二路电信号中携带的目的地址对应的输入/输出端口负载过载时，向所述SDN控制器发送负载过载的通知；所述SDN控制器，用于在接收到交换机发送的所述通知时，在发送所述通知的交换机的各个输入/输出端口中，除与第二路电信号的目的地址对应的输入/输出端口之外的其他输入/输出端口中选择至少一个输入/输 出端口，并将选择的至少一个输入/输出端口反馈给所述发送所述通知的交换机；所述至少两个交换机中，向所述SDN控制器发送通知的交换机，进一步用于将接收的所述至少一路电信号通过所述SDN控制器反馈的至少一个输入/输出端口输出。
结合第二方面，或者第二方面第一种可能的实现方式，在第二种可能的实现方式中，所述SDN控制器选择的至少一个输入/输出端口为所述发送所述通知的交换机的输入/输出端口中负载量最小的至少一个输入/输出端口。
结合第二方面，第二方面第一种可能的实现方式，第二种可能的实现方式中的任一项，在第三种可能的实现方式中，所述SDN控制器按照负载均衡原则，在发送所述通知的交换机的各个输入/输出端口中，除与第二路电信号的目的地址对应的输入/输出端口之外的其他输入/输出端口中选择至少一个输入/输出端口。
采用上述技术方案，通过SDN控制器对数据中心网络系统中的拓扑和丢包状态等进行监控，由SDN控制器根据每一个交换机的各个端口的负载状态对信号进行调度，使每一个交换机的各个端口的负载均衡，避免了部分端口拥塞，信号发送效率低的问题。
结合第二方面，第二方面第一种可能的实现方式，第二种可能的实现方式，第三种可能的实现方式中的任一项，在第四种可能的实现方式中，所述系统还包括扩展臂交换机，所述枢纽设备通过所述扩展臂交换机与其他至少一个枢纽设备通信连接。
结合第二方面，第二方面第一种可能的实现方式，第二种可能的实现方式，第三种可能的实现方式，第四种可能的实现方式中的任一项，在第五种可能的实现方式中，当所述交换机中包含的选路策略中不包含目的地地址对应的输入/输出端口时，所述交换机还用于：根据所述电信号中携带的目的地址，向自身的所有输入/输出端口分别广播消息，采用传输控制协议TCP/互联协议IP协议获取反馈响应消息的输入/输出端口，将所述反馈响应消息的输入/输出端口以及所述电信号中携带的目的地址之间的映射关系保存至选路策略 中；将所述电信号通过所述反馈响应消息的输入/输出端口发送至与自身存在通信连接的彩光模块。
采用上述技术方案，在交换机的选路策略中不包含电信号中携带的目的地址时，交换机能够通过TCP/IP协议获取该目的地址对应的输入/输出端口，从而保证了电信号的可靠传输，提高了电信号传输的效率。
本发明实施例中，数据中心网络系统采用星状网络拓扑结构，该星状网络拓扑结构以枢纽设备为中心，每一个枢纽设备与至少两个交换机之间存在通信连接，在每一个星状网络拓扑结构中，至少两个交换机中的至少一个交换机与至少一个服务器存在通信连接。采用本发明技术方案，每一个交换机均拥有与自身存在通信连接的枢纽设备，枢纽设备与交换机组成星状网络拓扑结构，相较于网状网络拓扑结构，在星状网络拓扑结构中无须在各个交换机设备之间均建立物理连接通道，各个设备之间布线更少，因而能够有效降低网络布线数量，降低后续网络维护的工作量；并且，相较于目前的三层网络架构中，由源服务器发送至目的服务器的所有信号，均需要通过汇聚层设备和核心层设备进行转发，本发明实施例的数据中心网络系统中源服务器输出的信号依次通过与源服务器存在通信连接的源交换机，枢纽设备，以及与目的服务器存在通信连接的目的交换机，进而到达目的服务器，所有信号仅通过枢纽设备进行转发，相较于三层网络架构，信号转发的层级较少，从而有利于实现数据中心网络系统的网络结构扁平化，减少了核心层设备和汇聚层设备所造成的能耗，有效降低了系统能耗和设备维护成本；此外，在数据中心网络系统中还包括彩光模块，该彩光模块将服务器发送至交换机的电信号转化为光信号，使枢纽设备和彩光模块之间仅传输光信号，由于光信号具备传输可靠性高，传输速度快，以及传输数据量大的优点，因此，本发明实施例的数据中心网络系统能够承载更为庞大的数据量，且提高了信号传输的可靠性和传输效率。
附图说明
图1为现有技术中数据中心网络结构示意图；
图2a为本发明实施例一中数据中心网络系统物理连接结构示意图；
图2b为本发明实施例一中数据中心网络系统逻辑连接结构示意图；
图3为本发明实施例二中在数据中心网络系统中进行信号传输的流程图；
图4为本发明实施例二中交换机结构示意图；
图5为本发明实施例AWG分波示意图；
图6为本发明实施例二中另一种交换机结构示意图；
图7为本发明实施例二中包含扩展臂交换机的数据中心网络系统结构示意图；
图8为本发明实施例三中交换机结构示意图；
图9为本发明实施例三中在数据中心网络系统中进行信号传输的流程图；
图10为本发明实施例六中信号传输系统架构示意图；
图11为本发明实施例六中一个POD的结构示意图；
图12为本发明实施例六中一个ZONE结构示意图；
图13a为本发明实施例六中多个ZONE水平扩展示意图；
图13b为本发明实施例六中多个ZONE垂直扩展示意图。
具体实施方式
为了解决传统数据中心网络中存在的布线数量庞大，维护困难的问题，本发明实施例中，数据中心网络系统采用星状网络拓扑结构，该星状网络拓扑结构以枢纽设备为中心，每一个枢纽设备与至少两个交换机之间存在通信连接，在每一个星状网络拓扑结构中，至少两个交换机中的至少一个交换机与至少一个服务器存在通信连接。采用本发明技术方案，每一个交换机均拥有与自身存在通信连接的枢纽设备，枢纽设备与交换机组成星状网络拓扑结构，相较于网状网络拓扑结构，在星状网络拓扑结构中无须在各个交换机设 备之间均建立物理连接通道，各个设备之间布线更少，因而能够有效降低网络布线数量，降低后续网络维护的工作量；并且，相较于目前的三层网络架构中，由源服务器发送至目的服务器的所有信号，均需要通过汇聚层设备和核心层设备进行转发，本发明实施例的数据中心网络系统中源服务器输出的信号依次通过与源服务器存在通信连接的源交换机，枢纽设备，以及与目的服务器存在通信连接的目的交换机，进而到达目的服务器，所有信号仅通过枢纽设备进行转发，相较于三层网络架构，信号转发的层级较少，从而有利于实现数据中心网络系统的网络结构扁平化，减少了核心层设备和汇聚层设备所造成的能耗，有效降低了系统能耗和设备维护成本；此外，在数据中心网络系统中还包括彩光模块，该彩光模块将服务器发送至交换机的电信号转化为光信号，使枢纽设备和彩光模块之间仅传输光信号，由于光信号具备传输可靠性高，传输速度快，以及传输数据量大的优点，因此，本发明实施例的数据中心网络系统能够承载更为庞大的数据量，且提高了信号传输的可靠性和传输效率。
下面结合附图对本发明的具体实施方式进行说明。
实施例一
参阅图2a所示，为本发明实施例中数据中心网络架构示意图，该数据中心网络系统包括枢纽设备20，至少两个交换机21，多个彩光模块22，至少两个合波/分波器23，以及至少两个服务器24，其中：
所述至少两个交换机21中的至少一个交换机与至少一个服务器24存在通信连接，且每一个交换机21的不同输入/输出端口与不同的彩光模块22存在通信连接；
与每个交换机21的不同输入/输出端口存在通信连接的不同彩光模块22均与一个合波/分波器23存在通信连接，其中，不同的交换机21通过彩光模块22与不同的合波/分波器23通信连接；
所述至少两个交换机21通过所述合波/分波器23与所述一个枢纽设备20构成星状网络拓扑结构，所述枢纽设备20分别通过不同的端口与不同的合波 /分波器23通信连接；
所述交换机21，用于接收至少两路电信号，并针对所述至少两路电信号中的每一路电信号分别按照下述针对第一路电信号的处理方式处理：确定与第一路电信号中携带的目的地址对应的输入/输出端口，通过所述确定的输入/输出端口将所述第一路电信号输出；其中，所述目的地址用于指示目的服务器，与所述目的地址对应的输入/输出端口是指与所述目的服务器通信连接的目的交换机所对应的输入/输出端口，所述目的服务器为所述至少两个服务器24中的一个服务器，所述目的交换机为与所述目的服务器通信连接的交换机；所述至少两路电信号包括以下任意一种或组合：与本交换机存在通信连接的服务器24发送的电信号，以及，来自所述至少两个交换机21中其他交换机的电信号；
所述彩光模块22，用于接收与自身存在通信连接的所述交换机21的输入/输出端口输出的电信号，并将接收的所述电信号转换为特定波长的光信号，其中，与一个交换机21的不同输入/输出端口存在通信连接的不同的彩光模块22转换的光信号的波长是不同的；
所述合波/分波器23，用于接收与自身存在通信连接的多个彩光模块22分别发送的多个光信号，并将所述多个光信号波分复用成合路信号；
所述枢纽设备20，用于接收所述合波/分波器23发送的合路信号，并将所述合路信号解复用，得到多个光信号；将所述多个光信号分别发送至与其中的每个光信号的目的交换机对应的端口，并将所述每个光信号从所述对应的端口输出，将从同一端口输出的光信号波分复用为合路信号；
所述合波/分波器23，进一步用于接收来自枢纽设备20的合路信号，并将所述合路信号解复用，得到多个光信号，并将所述多个光信号分别输入与所述光信号的波长对应的彩光模块22；
所述彩光模块22，进一步用于接收来自所述合波/分波器23的光信号，并将所述光信号转换为电信号后输出给与自身存在通信连接的交换机21的输入/输出端口；
所述交换机21，进一步用于将从彩光模块22接收到的电信号转发给所述电信号的目的服务器。
进一步的，所述数据中心网络系统还包括软件定义网络(Software Defined Network，简称SDN)控制器25，所述SDN控制器25与系统中的每个交换机21均存在通信连接：
所述交换机21，进一步用于接收至少一路电信号，并针对所述至少一路电信号中的每一路电信号分别按照下述针对第二路电信号的处理方式处理：确定与第二路电信号中携带的目的地址对应的输入/输出端口，在与第二路电信号中携带的目的地址对应的输入/输出端口负载过载时，向所述SDN控制器25发送负载过载的通知；
所述SDN控制器25，用于在接收到交换机21发送的所述通知时，在发送所述通知的交换机21的各个输入/输出端口中，除与第二路电信号的目的地址对应的输入/输出端口之外的其他输入/输出端口中选择至少一个输入/输出端口，并将选择的至少一个输入/输出端口反馈给所述发送所述通知的交换机21；
所述至少两个交换机21中，向所述SDN控制器25发送通知的交换机，进一步用于将接收的所述至少一路电信号通过所述SDN控制器反馈的至少一个输入/输出端口输出。
可选的，所述SDN控制器25选择的至少一个输入/输出端口为所述发送所述通知的交换机21的输入/输出端口中负载量最小的至少一个输入/输出端口。
可选的，所述SDN控制器25按照负载均衡原则，在发送所述通知的交换机的各个输入/输出端口中，除与第二路电信号的目的地址对应的输入/输出端口之外的其他输入/输出端口中选择至少一个输入/输出端口。
采用上述技术方案，通过SDN控制器对数据中心网络系统中的拓扑和丢包状态等进行监控，由SDN控制器根据每一个交换机的各个端口的负载状态对信号进行调度，使每一个交换机的各个端口的负载均衡，避免了部分端口 拥塞，信号发送效率低的问题。
可选的，所述多个彩光模块22中至少有一个彩光模块位于与自身存在通信连接的交换机21的内部。
可选的，所述合波/分波器23位于与自身存在通信连接的交换机21的内部。
可选的，所述服务器24与所述交换机21之间通过无线方式建立通信连接，或者，所述服务器24与所述交换机21之间通过有线电缆方式建立通信连接；所述交换机21与所述彩光模块22之间通过无线方式建立通信连接，或者，所述交换机21与所述彩光模块22之间通过有线电缆方式建立通信连接；所述彩光模块22与所述合波/分波器23之间通过无线方式建立通信连接，或者，所述彩光模块22与所述合波/分波器23之间通过光纤建立通信连接；所述合波/分波器23与枢纽设备20之间通过无线方式建立通信连接，或者，所述合波/分波器23与枢纽设备20之间通过一根光纤建立通信连接。
可选的，所述枢纽设备20为阵列波导光栅(Array Waveguide Grating，简称AWG)。
所述枢纽设备为AWG时，基于所述AWG的光学分波特性，本发明实施例的数据中心网络系统能够构成参阅图2b所示的逻辑连接结构示意图，该数据中心网络系统在逻辑上能够实现网状连接。
实施例二
基于所述实施例一描述的数据中心网络系统，为了便于描述，以下以数据中心网络系统包括源服务器，源交换机，枢纽设备，目的交换机，以及目的服务器，所述源服务器与多个彩光模块存在通信连接，所有彩光模块均与一个合波/分波器(以下称为源合波/分波器)存在通信连接，所述目的服务器也与多个彩光模块存在通信连接，所有彩光模块均与一个合波/分波器(以下称为目的合波/分波器)存在通信连接，且源服务器与源交换机存在通信连接，目的服务器与目的交换机存在通信连接，与源合波/分波器和目的合波/分波器 均通过一根光纤接入所述枢纽设备为例，详细描述本发明实施例中多路信号传输过程。
其中，源服务器和目的服务器为相对概念，即生成信号的服务器即为源服务器，接收该信号的服务器即为目的服务器，任何一个服务器既可以为源服务器，也可以为目的服务器，例如，服务器A向服务器B发送信号a，则在信号a的传输过程中，服务器A即为源服务器，服务器B即为目的服务器；又如，服务器A接收服务器B发送的信号b，则在信号b的传输过程中，服务器A即为目的服务器，服务器B即为源服务器。
参阅图3所示，本发明实施例的数据中心网络系统中信号传输流程，包括：
步骤300：源交换机接收至少两路电信号，并针对所述至少两路信号中的每一路电信号分别按照下述针对第一路电信号的处理方式处理：确定与第一路电信号中携带的目的地址对应的输入/输出端口，通过所述确定的输入/输出端口将所述第一路电信号输出。
参阅图4所示，为本发明实施例中交换机结构示意图。源交换机一端包含多个下行端口，每个下行端口均连接不同的源服务器，另一端包含多个输入/输出端口，每个输入/输出端口均连接不同的彩光模块。
本发明实施例中，所述源交换机接收的至少两路电信号包含以下多种情况的任意一种或者组合：与本源交换机存在通信连接的源服务器发送的电信号，以及，来自其他交换机的电信号。
其中，与源交换机存在通信连接的源服务器发送的至少两路电信号，包括：源服务器的数量为一个，源服务器根据业务需求，生成发送至至少两个目的服务器的至少两路电信号；例如，源服务器生成两路电信号，分别为电信号1，和电信号2，电信号1对应的目的服务器为服务器1，电信号2对应的目的服务器为服务器2，电信号1和电信号2对应的目的服务器不同，源交换机接收所述源服务器发送的信号1和信号2。与源交换机存在通信连接的源服务器发送的至少两路电信号，还包括：源服务器的数量为多个，每个源服 务器根据业务需求，分别生成发送至目的服务器的至少两路电信号；例如，源服务器A生成电信号1，源服务器B生成电信号2，而电信号1和电信号2对应的目的服务器可以相同，也可以不同，源交换机接收信号1和信号2。
可选的，源服务器发送出的信号可以为光信号，也可以为电信号。若所述源服务器发送出的信号为光信号，则由于交换机不具备处理光信号的能力，因此，在源服务器和源交换机之间，或者在所述源交换机内部，还需要设置光电转换装置，所述光电转换装置分别与所述源服务器和所述源交换机之间存在通信连接，用于将所述源服务器发送的光信号转换为电信号，并将转换后得到的电信号发送至所述源交换机。
其中，所述源交换机为机架交换机(Top of Rack，简称TOR)，且所述第一交换机为具备三层功能的以太网交换机；所述源交换机的下行端口可以通过SFP+/XFP 10GE光电转换端口实现，所述10GE光电转换端口中包含一个10GE LAN光模块，所述10GE LAN光模块输出的是850纳米的多模光信号；所述源交换机的输入/输出端口可以包含10GE LAN光模块或者10GE LAN电模块。
此外，所述源交换机的输入/输出端口的数量与具体应用场景中数据中心网络系统中交换机的数量以及互联带宽相关，即当数据中心网络系统中交换机的数量越多，所述输入/输出端口数目越大，所述互联带宽越大，所述输入/输出端口数目越大；例如，数据中心网络系统存在N台TOR和M台扩展臂交换机，任意两台TOR之间部署n个10G链路，TOR与扩展臂交换机之间部署m个10G链路，则每个TOR的输入/输出端口数目为：n(N-1)+mM；如共24台TOR，3个扩展臂交换机，任意TOR与其他TOR之间，以及任意TOR与扩展臂交换机之间均采用一条10G链路互联，则输入/输出端口数目为26(1*(24-1)+1*3＝26)个。
可选的，所述源交换机中包含选路策略，所述选路策略中包含输入/输出端口与目的地址段之间的映射关系，当源交换机接收到源服务器发送的电信号时，即获取所述电信号中携带的目的地址，从所述选路策略中选取与所述 获取的目的地址段存在映射关系的输入/输出端口，将所述电信号发送至所述选取的输入/输出端口即可。其中，所述选路策略为创建数据中心网络系统时，根据网络部署预先配置得到。
可选的，参阅图4所示，所述源交换机内部可以包含光路选择控制器，由所述光路选择控制器将接收到的电信号根据选路策略，输出至自身所有输入/输出端口中，与电信号中携带的目的地址对应的输入/输出端口。
进一步的，源交换机在接收到所述至少两路电信号后，还需要判断所述至少两路电信号中是否存在传输至与自身存在通信连接的服务器的电信号；若存在，则直接通过所述源交换机上与所述电信号中携带的目的地址对应的输入/输出端口将所述电信号转发至与自身存在通信连接的目的服务器；否则，执行将所述电信号通过根据所述选路策略选取的输入/输出端口将所述电信号发送至与所述选取的输入/输出端口存在通信连接的彩光模块的步骤。
进一步的，当所述源交换机中包含的选路策略中不包含目的地地址对应的输入/输出端口时，所述源交换机根据所述电信号中携带的目的地址，向所有输入/输出端口分别发送广播消息，采用传输控制协议(Transmission Control Protocol，简称TCP)/互联协议(Internet Protocol，简称IP)协议获取反馈响应消息的输入/输出端口，将所述反馈响应消息的输入/输出端口以及所述电信号中携带的目的地址之间的映射关系保存至选路策略中；同时所述源交换机将所述电信号通过所述反馈响应消息的输入/输出端口发送至与自身存在通信连接的彩光模块。
采用上述技术方案，在源服务器包含的选路策略中不包含电信号中携带的目的地址时，源服务器能够通过TCP/IP协议获取该目的地址对应的输入/输出端口，从而保证了电信号的可靠传输，提高了电信号传输的效率。
步骤310：与所述源交换机存在通信连接的彩光模块接收所述源交换机发送的信号，将接收的所述电信号转换为特定波长的光信号输出至源合波/分波器。
本发明实施例中，参阅图4所示，所述源交换机的每一个输入/输出端口 分别连接一个彩光模块，每一个彩光模块分别能够将接收到的电信号转换为不同波长的光信号。其中，每一个彩光模块所能处理的光信号的波长为创建数据中心网络系统时，根据网络部署预先配置得到。
可选的，所述彩光模块为10GE彩光模块，所述10GE彩光模块彩光模块输出的是1310纳米或1550纳米的单模光信号。
采用上述技术方案，源交换机将接收到的包含不同目的地址的电信号分别发送至不同的输入/输出端口，由于每一个输入/输出端口所连接的彩光模块所能处理的光信号的波长不同，从而将多路电信号转换为不同波长的光信号，通过波长区分不同的电信号，也便于后续枢纽设备根据所述光信号的波长，识别所述光信号发送至的目的交换机。
步骤320：源合波/分波器将接收到的各路光信号波分复用为合路信号，并将所述合路信号发送至枢纽设备。
本发明实施例中，源合波/分波器具备波分复用功能，以及解波分复用功能，源合波/分波器能够接收与自身存在通信连接的所有彩光模块生成的光信号，并将接收到的各个光信号物理上合为一路合路信号，输出至彩光口；其中，所述合路信号中包含所述各个彩光模块发送的各个波长的光信号；所述源合波/分波器将所述合路信号通过所述源合波/分波器与所述枢纽设备之间的一根光纤传输至所述枢纽设备。
采用上述技术方案，将交换机发送的多路电信号转换为光信号，并将转换后得到的光信号通过一根光纤传输至枢纽设备，从而保证了交换机所传输电信号的可靠性，且由于光纤具备容量大的特点，仅通过一根光纤，即可满足交换机和枢纽设备之间信号的传输量，因此，相较于采用电缆传输信号，通过光纤传输电信号，能够有效减少数据中心网络系统的布线量。
步骤330：所述枢纽设备接收源合波/分波器发送的合路信号，并将所述合路信号解复用，得到多个光信号；将所述多个光信号分别发送至与其中的每个光信号的目的交换机对应的端口，并将所述每个光信号从所述对应的端口输出，将从同一端口输出的光信号波分复用为合路信号。
本发明实施例中，所述枢纽设备通过自身的一个端口接收源合波/分波器通过彩光口发送的合路信号，由于所述枢纽设备的每一个端口均包含一个预先设立的映射关系，该映射关系中包含各个波长和端口的对应关系，所述枢纽设备中每一个端口所包含的映射关系不同，该映射关系为创建数据中心网络系统时，根据网络部署预先配置得到；枢纽设备将所述合路信号进行解复用，得到多个光信号；针对每一个光信号，所述枢纽设备均执行如下操作：根据该光信号的波长，查找该端口所包含的映射关系，从所述映射关系中查找该光信号的波长对应的端口，并将所述光信号传输至所述查找到的端口；通过所述查找到的端口，将该光信号发送出去；当所述查找到的端口处包含多个光信号时，所述枢纽设备先将所述查找到的端口处包含的所有光信号进行波分复用，生成一路合路信号，再将所述合路信号发送出去。
参阅图5所示，为当所述枢纽设备为AWG时，所述AWG根据不同光信号的波长，为各个光信号查找对应的端口的结构示意图。针对源交换机发送的多个波长的光信号，所述AWG将该源交换机输入的所有光信号的波长作为一个输入矩阵(行数为1，列数为N，矩阵中的每一个元素即为一个光信号的波长)。
参阅图5所示，针对所述AWG的a1端口，所述a1端口接收到多个光信号后，该端口处的光信号经所述AWG分波处理后，生成所述输入矩阵的转置矩阵(行数为N，列数为1，转置矩阵中的每一个元素即为一个光信号的波长)，该转置矩阵即为端口a1的输出矩阵，输出矩阵中的每一个元素分别对应一个端口(b1至bn)；针对所述AWG的a2端口，所述a2端口接收到多个光信号后，该端口处的光信号经过所述AWG分波处理后，生成所述输入矩阵的转置矩阵，并将所述转置矩阵中的元素循环向下移动一位，生成输出矩阵，输出矩阵中的每一个元素分别对应一个端口(b1至bn)；以此类推，AWG针对所述AWG的an个端口，所述an端口接收到多个光信号后，将该端口处的光信号经所述AWG分波处理后，生成所述输入矩阵的转置矩阵，并将所述转置矩阵中的元素循环向下移动(n-1)位，生成输出矩阵，输出矩阵中的每一个元 素分别对应一个端口(b1至bn)。其中，所述端口a1至an，b1至bn可以为接收交换机发送的光信号的输入端口，也可以为向交换机发送光信号的输出端口。
采用上述技术方案，通过AWG能够将接收到的不同波长的光信号传输至数据中心网络系统中的每一个交换机，从而在逻辑上实现了全网覆盖；并且，由于AWG为光学器件，光学器件的性能要远远优于电学器件，因此，通过AWG实现了数据中心网络系统中交换机的两两互连同时，还能够解决了现有技术中多层次网络带来的网络设备功耗大，以及维修困难的问题。
步骤340：目的合波/分波器接收所述枢纽设备的合路信号，并将所述合路信号解复用，得到多个光信号，并将所述多个光信号分别输入与所述光信号的波长对应的彩光模块。
本发明实施例中，目的合波/分波器通过自身与枢纽设备之间的一根光纤，接收枢纽设备发送的合路信号，并将所述合路信号进行解复用处理，得到多个光信号；所述目的合波/分波器针对得到的每一个光信号，分别执行如下操作：所述目的合波/分波器中包含波长和彩光模块的映射关系；所述目的合波/分波器从自身保存的映射关系中查找与该光信号的波长存在映射关系的彩光模块，并将该光信号发送至所述查找到的彩光模块。
采用上述技术方案，合波/分波器通过一根光纤接收枢纽设备发送的包含多个信号的合路信号，相较于采用电缆传输信号，通过光纤传输电信号，能够有效减少数据中心网络系统的布线量。
可选的，所述目的合波/分波器可以向多个彩光模块同时发送光信号。例如，目的合波/分波器对合路信号解复用后，得到信号1，信号2和信号3，信号1的波长为波长1，信号2的波长为波长2，信号3的波长为波长3；则目的合波/分波器根据自身中保存的映射关系，确定波长1对应的彩光模块为彩光模块2，波长2对应的彩光模块为彩光模块3，波长3对应的彩光模块为彩光模块1，基于此，目的合波/分波器将信号1发送至彩光模块2，将信号2发送至彩光模块3，将信号3发送至彩光模块1。
步骤350：与所述目的合波/分波器存在通信连接的彩光模块将所述目的合波/分波器发送的光信号转换为电信号后输出给与自身存在通信连接的目的交换机的输入/输出端口。
本发明实施例中，与所述目的合波/分波器存在通信连接的每一个彩光模块接收到所述目的合波/分波器发送的光信号后，均执行如下操作：将所述光信号转换为电信号，并将所述电信号传输至与该彩光模块存在通信连接的目的交换机的输入/输出端口。
可选的，所述彩光模块为10GE彩光模块，所述10GE彩光模块彩光模块输出的是1310纳米或1550纳米的单模光信号。
步骤360：所述目的交换机获取接收到的电信号中携带的目的地址，并将所述电信号发送至所述目的地址所指示的目的交换机。
本发明实施例中，参阅图4所示，目的交换机一端包含多个下行端口，每个下行端口均连接不同的目的服务器，另一端包含多个输入/输出端口，每个输入/输出端口均连接不同的彩光模块。
由于所述电信号中携带有目的地址，因此，目的交换机从输入/输出端口接收到彩光模块发送的电信号后，能够根据每一路电信号中携带的目的地址，确定连接所述目的地址所指示的目的服务器的下行端口；所述目的交换机通过所述确定的下行端口，将所述电信号传输至相应目的服务器。
可选的，目的服务器可接收的信号为光信号，也可以为电信号。若所述目的服务器接收的信号为光信号，则由于传统的交换机不具备处理光信号的能力，因此，在目的服务器和目的交换机之间，或者在所述目的交换机内部，还需要设置光电转换装置，所述光电转换装置分别与所述目的服务器和所述目的交换机之间存在通信连接，用于将所述目的交换机发送的电信号转换为光信号，并将转换后得到的光信号发送至所述目的服务器。其中，所述目的交换机的下行端口与所述源交换机的下行端口相同，所述目的交换机的输入/输出端口数目确定方法和所述源交换机的输入输出端口数目确定方法相同，所述目的交换机的内部结构与所述源交换机的内部结构也相同，在此不再赘 述。
在具体的应用场景中，参阅图4所示，源交换机为传统以太网交换机，源服务器通过传统以太网技术接入源交换机；源交换机根据自身保存的的选路策略完成24路输入到26路输出的电交叉变换，其中，该源交换机包含24路下行端口连接源服务器，以及26路输入/输出端口连接彩光模块，输入/输出端口相较于所述源交换机连接源服务器的端口所多出的端口可以连接扩展臂交换机；26路输入/输出端口输出的电信号通过彩光光模块完成电信号到光信号的转换，通过合波/分波器完成光信号波长的调制过程，以及将波长调制后得到的合路信号汇聚到源合波/分波器复用至一根光纤上输出至枢纽设备的一端口；相对的，在目的合波/分波器接收到枢纽设备发送的合路信号(该合路信号包含多个波长的光信号)，该合路信号通过目的合波/分波器对所述合路信号进行解复用，生成不同波长的光信号，并根据每个光信号的波长，分别将每个光信号输出至能够处理该波长的光信号的彩光模块，通过不同的彩光模块将所述光信号转换为电信号，输出至目的交换机，目的交换机根据电信号中携带的目的地址，将所述电信号传输至相应的目的服务器。
在另一个应用场景中，参阅图6所示，源交换机和目的交换机均为传统以太网交换机，源服务器通过传统以太网技术接入源交换机；源交换机根据自身保存的的选路策略完成64路输入到64路输出的电交叉变换，其中，该源交换机包含64路下行端口连接源服务器，以及64路输入/输出端口连接彩光模块；该种应用场景下，信号传输过程与图4所示的应用场景类似，在此不再赘述。
本发明实施例中，以一个枢纽设备为中心的星状网络拓扑结构构成一个CELL，CELL可与实际业务中的一个业务分区、一个交付单元或者一个系统集群等概念对应。在实际应用场景中，网络系统中可以包含多个CELL，每个CELL之间通过扩展臂交换机相连接。因此，参阅图7所示，本发明实施例中的CELL中还包含扩展臂交换机，用于连接本CELL和其他CELL，扩展臂交换机的形态与TOR一致，但是扩展臂交换机无上下行端口的区分，所有端口 均用于不同CELL之间的互联。
可选的，参阅图7所示，数据中心网络系统包含24台TOR和3个扩展臂交换机，为每一个TOR和扩展臂交换机都配置相应的波长；每个TOR通过27个波长与另外23台TOR以及3台扩展臂交换机构成网络层连接，每个波长承载10GB的带宽；在链路层，每个TOR中的23个输入/输出端口与其他TOR互联，3个输入/输出端口与扩展臂交换机互联；且在链路层，每个TOR的下行端口为24个10GE端口，每个TOR均接入24台服务器，即每台服务器均连接TOR的一个10GE下行端口；并且，在链路层每个扩展臂交换机包含共52个10GE端口，其中26个端口连接本CELL，其余26个端口与其他相邻CELL互联。
采用本发明实施例技术方案，无须对现有的以太网交换机进行改造，直接在以太网交换机和枢纽设备之间添加合波/分波器和彩光模块即可，降低了设备改造成本；并且，通过合波/分波器将多个波长的光信号通过一根光纤传输，大幅减少数据中心网络系统中的布线数量，降低了数据中心网络系统运维难度；此外，当枢纽设备为AWG时，组成数据中心网络系统的AWG、交换机和服务器均为小型网络设备，通过连接小型网络设备，形成对等、分散、无差异的众多小设备间的互连，构建数据中心网络系统的中各个交换机之间的全连接，无须使用核心层设备和汇聚层设备，降低了数据中心网络的构建成本以及维护成本。
实施例三
基于所述实施例一描述的数据中心网络系统，为了便于描述，以下以数据中心网络包括源服务器，源交换机，枢纽设备，目的交换机，以及目的服务器，参阅图8所示，所述源服务器中包含多个彩光模块以及一个源合波/分波器，所有彩光模块均与所述源合波/分波器存在通信连接，所述目的服务器也包含多个彩光模块存在通信连接以及一个目的合波/分波器，所有彩光模块均与所述目的合波/分波器存在通信连接，且源服务器与源交换机存在通信连 接，目的服务器与目的交换机存在通信连接，与源交换机中的源合波/分波器和目的交换机中的合波/分波器均通过一根光纤接入所述枢纽设备为例，详细描述本发明实施例中多路信号传输过程。
其中，源服务器和目的服务器为相对概念，即生成信号的服务器即为源服务器，接收该信号的服务器即为目的服务器，任何一个服务器既可以为源服务器，也可以为目的服务器。
参阅图9所示，本发明实施例的数据中心网络系统中信号传输流程，包括：
步骤900：源交换机接收至少两路电信号，并针对所述至少两路信号中的每一路电信号分别按照下述针对第一路电信号的处理方式处理：确定与第一路电信号中携带的目的地址对应的输入/输出端口，通过所述确定的输入/输出端口将所述第一路电信号输出；由所述源交换机中的彩光模块将所述源交换机接收到的电信号转换为特定波长的光信号；由所述源交换机中的所述源合波/分波器，将所述彩光模块转换得到的光信号波分复用为合路信号，并将所述合路信号发送至枢纽设备。
参阅图8所示，为本发明实施例中交换机结构示意图。源交换机一端包含多个下行端口，每个下行端口均连接不同的源服务器，源交换机中还包含多个输入/输出端口，每个输入/输出端口均连接不同的彩光模块。
本发明实施例中，所述源交换机接收的至少两路电信号包含多种情况的任意一种或者组合：与本源交换机存在通信连接的源服务器发送的电信号，以及，来自其他交换机的电信号。
其中，与源交换机存在通信连接的源服务器发送的至少两路电信号，包括：源服务器的数量为一个，源服务器根据业务需求，生成发送至至少两个目的服务器的至少两路电信号；或者，源服务器的数量为多个，每个源服务器根据业务需求，分别生成发送至目的服务器的至少两路电信号。
可选的，源服务器发送出的信号可以为光信号，也可以为电信号。若所述源服务器发送出的信号为光信号，则由于交换机不具备处理光信号的能力， 因此，在源服务器和源交换机之间，或者在所述源交换机内部，还需要设置光电转换装置，所述光电转换装置分别与所述源服务器和所述源交换机之间存在通信连接，用于将所述源服务器发送的光信号转换为电信号，并将转换后得到的电信号发送至所述源交换机。
可选的，所述源交换机的内部结构，下行端口形态，以及输入/输出端口的数量确定方法，均与实施例二中的源交换机相同，在此不再赘述。
可选的，所述源交换机内部包含选路策略，所述源交换机根据所述选路策略，获取所述电信号对应的输入/输出端口，其具体过程与实施例二中的源交换机确定电信号对应的输入/输出端口的方式相同，在此不再赘述。
进一步的，当所述源交换机中包含的选路策略中不包含目的地地址对应的输入/输出端口时，所述源交换机获取所述电信号对应的输入/输出端口的方式与实施例二种源交换机在选路策略中不包含目的地地址对应的输入/输出端口场景下，获取所述电信号对应的输入/输出端口的方式相同，在此不再赘述。
可选的，参阅图8所示，所述源交换机内部可以包含光路选择控制器，用于将接收到的电信号根据选路策略，输出至自身相应的输入/输出端口。
进一步的，源交换机在接收到所述至少两路电信号后，还需要判断所述至少两路电信号中是否存在传输至与自身存在通信连接的服务器的电信号，其处理过程与实施例二中的源交换机处理电信号的方式相同，在此不再赘述。
进一步的，所述源交换机中的每一个彩光模块分别能够将接收到的电信号转换为不同波长的光信号。其中，每一个彩光模块所能处理的光信号的波长为创建数据中心网络系统时，根据网络部署预先配置得到。
可选的，所述彩光模块为10GE彩光模块，所述10GE彩光模块彩光模块输出的是1310纳米或1550纳米的单模光信号。
本发明实施例中，源合波/分波器的功能，以及处理光信号的方式与实施例二中源合波/分波器处理光信号的方式相同，在此不再赘述。
步骤910：所述枢纽设备接收源合波/分波器发送的合路信号，并将所述合路信号解复用，得到多个光信号；将所述多个光信号分别发送至与其中的 每个光信号的目的交换机对应的端口，并将所述每个光信号从所述对应的端口输出，将从同一端口输出的光信号波分复用为合路信号。
本发明实施例中，所述枢纽设备接收合路信号，对合路信号的处理方式，以及合路信号的输出方式，均与实施例二中，枢纽设备传输合路信号的方式相同，在此不再赘述。
步骤920：所述目的交换机中的目的合波/分波器接收所述枢纽设备的合路信号，并将所述合路信号解复用，得到多个光信号，并将所述多个光信号分别输入与所述光信号的波长对应的所述目的交换机中的彩光模块；由所述目的交换机中的彩光模块将所述目的合波/分波器发送的光信号转换为电信号后输出给与自身存在通信连接的目的交换机的输入/输出端口；所述目的交换机获取接收到的电信号中携带的目的地址，并将所述电信号发送至所述目的地址所指示的目的交换机。
本发明实施例中，目的合波/分波器通过自身与枢纽设备之间的一根光纤，接收枢纽设备发送的合路信号，并将所述合路信号进行解复用处理，得到多个光信号；所述目的合波/分波器针对得到的每一个光信号，分别执行如下操作：所述目的合波/分波器中包含波长和彩光模块的映射关系；所述目的合波/分波器从自身保存的映射关系中查找与该光信号的波长存在映射关系的彩光模块，并将该光信号发送至所述查找到的彩光模块。
可选的，所述彩光模块为10GE彩光模块，所述10GE彩光模块彩光模块输出的是1310纳米或1550纳米的单模光信号。
本发明实施例中，参阅图8所示，所述目的交换机的结构及功能和所述源交换机的结构及功能相同，在此不再赘述。
在具体的应用场景中，参阅图8所示，源交换机和目的交换机均为传统以太网交换机，源服务器通过传统以太网技术接入源交换机；源交换机根据自身保存的的选路策略完成24路输入到26路输出的电交叉变换，其中，该源交换机包含24路下行端口连接源服务器，以及26路输入/输出端口连接彩光模块，输入/输出端口相较于所述源交换机连接源服务器的端口所多出的端口可以连 接扩展臂交换机。
可选的，当所述源交换机和目的交换机为TOR时，任意两台TOR之间可以存在一个10G的直连链路；TOR与扩展臂交换机，以及扩展臂交换机与扩展臂交换机之间可存在多条10G链路；此外，TOR中连接枢纽设备的端口在介质访问控制层(Media Access Control，简称MAC)呈现为一个10GE端口，对应一条交换机之间的10G互联链路；在光层，所述10GE端口将被交叉映射到一个波长为λi、速率为10G的光路上；并且，TOR中连接枢纽设备的端口和扩展臂交换机的端口为波分复用的端口，该端口中承载N个波长分别为λ1λ2λ3…λN的光信号，每个波长对应一条交换机之间的10G链路。
在另一个应用场景中，源交换机和目的交换机均为传统以太网交换机，源服务器通过传统以太网技术接入源交换机；源交换机根据自身保存的的选路策略完成64路输入到64路输出的电交叉变换，其中，该源交换机包含64路下行端口连接源服务器，以及64路输入/输出端口连接彩光模块。
其中，所述32路下行端口可配置为24路10GE端口，以及2路40GE端口；32路内部端口可按需配置，如需要提供26路光路信号就仅插入26个彩光模块。
采用本发明实施例技术方案，将波分复用技术和以太网交换机技术进行有机结合，实现光纤虚拟化，大幅减少数据中心网络系统的布线数量，降低数据中心网络系统的运维难度；并且，当枢纽设备为AWG时，AWG、交换机和服务器均为小型网络设备，通过连接小型网络设备，形成对等、分散、无差异的众多小设备间的互连，构建数据中心网络系统的中各个交换机之间的全连接、实现了中心化的新型数据中心网络架构，无须使用核心层设备和汇聚层设备，降低了数据中心网络的构建成本以及维护成本。
本发明实施例中，以一个枢纽设备为中心的星状网络拓扑结构构成一个CELL，CELL可与实际业务中的一个业务分区、一个交付单元或者一个系统集群等概念对应。在实际数据中心网络中，可以包含多个CELL，每个CELL之间通过扩展臂交换机相连接。因此，参阅图7所示，本发明实施例中的CELL中还包含扩展臂交换机，用于连接本CELL和其他CELL，扩展臂交换机的形 态与TOR一致，但是扩展臂交换机无上下行端口的区分，所有端口均用于不同CELL之间的互联。
实施例四
基于所述实施例一至实施例三所描述的数据中心网络系统，以下以数据中心网络包括源服务器，源交换机，枢纽设备，目的交换机，以及目的服务器，所述源服务器与多个彩光模块存在通信连接，所有彩光模块均与一个合波/分波器(以下称为源合波/分波器)存在通信连接，所述目的服务器也与多个彩光模块存在通信连接，所有彩光模块均与一个合波/分波器(以下称为目的合波/分波器)存在通信连接，且源服务器与源交换机存在通信连接，目的服务器与目的交换机存在通信连接，与源合波/分波器和目的合波/分波器均通过一根光纤接入所述枢纽设备为例，详细描述本发明实施例中多路信号传输过程。
其中，源服务器和目的服务器为相对概念，即生成信号的服务器即为源服务器，接收该信号的服务器即为目的服务器，任何一个服务器既可以为源服务器，也可以为目的服务器。
本发明实施例中，所述源交换机为基于框式服务器的交换插板(以下称为源交换插板)，源服务器通过插接在所述交换插板中的方式与源交换机存在通信连接；相应的，所述目的服务器为框式服务器的交换插板(以下称为目的交换插板)，目的服务器通过插接在所述交换插板中的方式与目的交换机存在通信连接。
可选的，数据中心网络系统中信号传输流程与所述实施例二中的信号传输过程相同，在此不再赘述。
进一步的，所述源交换机可以为包含彩光模块以及源合波/分波器的交换机，且目的交换机也可以为包含彩光模块以及目的合波/分波器的交换机，在此应用场景下，数据中心网络系统中信号传输过程与实施例三类似，在此不再赘述。
本发明实施例中，以一个枢纽设备为中心的星状网络拓扑结构构成一个CELL，CELL可与实际业务中的一个业务分区、一个交付单元或者一个系统集群等概念对应。在实际数据中心网络中，可以包含多个CELL，每个CELL之间通过扩展臂交换机相连接。因此，参阅图7所示，本发明实施例中的CELL中还包含扩展臂交换机，用于连接本CELL和其他CELL，扩展臂交换机的形态与TOR一致，但是扩展臂交换机无上下行端口的区分，所有端口均用于不同CELL之间的互联。
实施例五
基于所述实施例一至实施例三所描述的数据中心网络系统，以下以数据中心网络包括源服务器，源交换机，枢纽设备，目的交换机，以及目的服务器，所述源服务器与多个彩光模块存在通信连接，所有彩光模块均与一个合波/分波器(以下称为源合波/分波器)存在通信连接，所述目的服务器也与多个彩光模块存在通信连接，所有彩光模块均与一个合波/分波器(以下称为目的合波/分波器)存在通信连接，且源服务器与源交换机存在通信连接，目的服务器与目的交换机存在通信连接，与源合波/分波器和目的合波/分波器均通过一根光纤接入所述枢纽设备为例，详细描述本发明实施例中多路信号传输过程。
其中，源服务器和目的服务器为相对概念，即生成信号的服务器即为源服务器，接收该信号的服务器即为目的服务器，任何一个服务器既可以为源服务器，也可以为目的服务器。
本发明实施例中，所述源交换机为基于框式服务器的交换插板(以下称为源交换插板)，源服务器通过插接在所述交换插板中的方式与源交换机存在通信连接；或者，所述目的服务器为框式服务器的交换插板(以下称为目的交换插板)，目的服务器通过插接在所述交换插板中的方式与目的交换机存在通信连接。
本发明实施例的数据中心网络系统中信号传输流程与实施例二和实施例 四类似，在此不再赘述。
进一步的，所述源交换机可以为包含彩光模块以及源合波/分波器的交换机，且目的交换机也可以为包含彩光模块以及目的合波/分波器的交换机，在此应用场景下，数据中心网络系统中信号传输过程与实施例三类似，在此不再赘述。
本发明实施例中，以一个枢纽设备为中心的星状网络拓扑结构构成一个CELL，CELL可与实际业务中的一个业务分区、一个交付单元或者一个系统集群等概念对应。在实际数据中心网络中，可以包含多个CELL，每个CELL之间通过扩展臂交换机相连接。因此，参阅图7所示，本发明实施例中的CELL中还包含扩展臂交换机，用于连接本CELL和其他CELL，扩展臂交换机的形态与TOR一致，但是扩展臂交换机无上下行端口的区分，所有端口均用于不同CELL之间的互联。
实施例六
所述实施例一至实施例五的数据中心网络系统中仅包含一个枢纽设备，参阅图7所示，所述枢纽设备中还包括扩展臂交换机，所述扩展臂交换机用于连接本枢纽设备与其他枢纽设备。
参阅图10所示，多个CELL组成了信号传输系统，该信号传输系统包含至少两个星状网络拓扑结构,每个所述星状网络拓扑结构包括一个枢纽设备100，至少两个交换机110，多个彩光模块120，至少两个合波/分波器130，以及至少两个服务器140，所述至少两个星状网络拓扑结构内的枢纽设备100存在通信连接，其中：
在一个所述星状网络拓扑结构内：所述至少两个交换机110中的至少一个交换机与至少一个服务器140存在通信连接，且每一个交换机110的不同输入/输出端口与不同的彩光模块120存在通信连接；
与每个交换机110的不同输入/输出端口存在通信连接的不同彩光模块120均与一个合波/分波器130存在通信连接，其中，不同的交换机110通过 彩光模块120与不同的合波/分波器130通信连接；
所述至少两个交换机110分别通过与自身存在通信连接的合波/分波器130与所述一个枢纽设备100构成星状网络拓扑结构，所述枢纽设备100分别通过不同的端口与不同的合波/分波器130通信连接；所述至少两个枢纽设备100中的任一枢纽设备与其他至少一个枢纽设备之间存在通信连接；
在任意两个所述星状网络拓扑结构之间：其中一个所述星状网络拓扑结构内的所述交换机110，用于接收至少两路电信号，并针对所述至少两路电信号中的每一路电信号分别按照下述针对第一路电信号的处理方式处理：确定与第一路电信号中携带的目的地址对应的输入/输出端口，通过所述确定的输入/输出端口将所述第一路电信号输出；其中，所述目的地址用于指示目的服务器，与所述目的地址对应的输入/输出端口是指与所述目的服务器通信连接的目的交换机所对应的输入/输出端口，所述目的服务器为另一个星状网络拓扑结构内的服务器，所述目的交换机为与所述目的服务器通信连接的交换机；所述至少两路电信号包括以下任意一种或组合：与本交换机存在通信连接的服务器发送的电信号，以及，来自与本交换机属于同一星状网络拓扑结构的所述至少两个交换机中其他交换机发来的电信号，以及来自与本交换机属于不同星状网络拓扑结构的交换机的电信号；
彩光模块120，用于接收与自身存在通信连接的所述交换机110的输入/输出端口输出的电信号，并将接收的所述电信号转换为特定波长的光信号，其中，与一个交换机的不同输入/输出端口存在通信连接的不同的彩光模块120转换的光信号的波长是不同的；
所述合波/分波器130，用于接收与自身存在通信连接的多个彩光模块120分别发送的多个光信号，并将所述多个光信号波分复用成合路信号；
所述枢纽设备100用于：接收与所述枢纽设备100位于同一星状网络拓扑结构的合波/分波器130发送的合路信号，和/或，与所述枢纽设备位于不同星状网络拓扑结构的枢纽设备发送的合路信号，并将所述合路信号解复用，得到多个光信号；将所述多个光信号分别发送至与其中的每个光信号的目的 交换机对应的端口，并将所述每个光信号从所述对应的端口输出，将从同一端口输出的光信号波分复用为合路信号，其中，得到的所述多个光信号中至少一个光信号的目的交换机位于另一个星状网络拓扑结构，所述目的交换机位于另一个星状网络拓扑结构的光信号通过所述枢纽设备的一个端口输出，并传输至另一个枢纽设备；
所述合波/分波器130，进一步用于接收来自与自身存在通信连接的枢纽设备100的合路信号，并将所述合路信号解复用，得到多个光信号，并将所述多个光信号分别输入与所述光信号的波长对应的彩光模块120；
所述每个彩光模块120，进一步用于接收来自与自身存在通信连接的所述合波/分波器130的光信号，并将所述光信号转换为电信号后输出给与自身存在通信连接的交换机110的输入/输出端口；
所述交换机110，进一步用于将从与自身存在通信连接的彩光模块接收到的电信号转发给所述电信号的目的服务器140。
进一步的，所述系统还包括SDN控制器150，所述SDN控制器150与系统中的每个交换机110均存在通信连接：
所述交换机110，进一步用于接收至少一路电信号，并针对所述至少一路电信号中的每一路电信号分别按照下述针对第二路电信号的处理方式处理：确定与第二路电信号中携带的目的地址对应的输入/输出端口，在与第二路电信号中携带的目的地址对应的输入/输出端口负载过载时，向所述SDN控制器150发送负载过载的通知；
所述SDN控制器150，用于在接收到交换机110发送的所述通知时，在发送所述通知的交换机110的各个输入/输出端口中，除与第二路电信号的目的地址对应的输入/输出端口之外的其他输入/输出端口中选择至少一个输入/输出端口，并将选择的至少一个输入/输出端口反馈给所述发送所述通知的交换机110；
所述至少两个交换机中，向所述SDN控制器150发送通知的交换机110，进一步用于将接收的所述至少一路电信号通过所述SDN控制器150反馈的至 少一个输入/输出端口输出。
可选的，所述SDN控制器150选择的至少一个输入/输出端口为所述发送所述通知的交换机的输入/输出端口中负载量最小的至少一个输入/输出端口。
可选的，所述SDN控制器150按照负载均衡原则，在发送所述通知的交换机的各个输入/输出端口中，除与第二路电信号的目的地址对应的输入/输出端口之外的其他输入/输出端口中选择至少一个输入/输出端口。
本发明实施例中，由多个CELL按照一定规则及拓扑组成的网络称为配置点(Point of Deployment，简称POD)，POD的规模大于CELL；在实际组网环境中，POD可与一个AZ(Avilable ZONE)，对应于现实场景中的一个云集群或者一个机房模块。
可选的，所述POD包含两种形式，即标准POD和非标准POD。其中，标准POD具备如下三个条件：组成此POD的所有CELL结构一样，即所有CELL的TOR数量、扩展臂交换机数量、每个TOR的端口数量及带宽、扩展臂交换机的端口数量及带宽，以及每个CELL内包含的TOR和扩展臂交换机的连接方式均相同；所有CELL通过扩展臂交换机互联成环状；例如，参阅图11所示，6个CELL组成一个POD：每个CELL由24个TOR和3个扩展臂交换机组成；每相邻两个CELL通过扩展臂交换机互连，或者，每相邻两个CELL通过各自CELL的扩展臂互连；共需要6个扩展臂实现连接，并构成一个环网。非标准POD具备如下特点：POD内的各个CELL的组网模式可以不同；不同CELL间通过扩展臂交换机自由互联，不一定组成环网。
参阅图12所示，由多个POD按照一定的规则和拓扑构成的网络为ZONE。ZONE为蜂巢架构-蜂窝状多POD互联组网，该组网方式是一种ZONE的标准组网方案；其中，一个ZONE由6个POD互联组成，每相邻两个POD即有2个CELL重叠，故一个ZONE内部，共用24个CELL；通过边缘的扩展臂交换机可与网络出口等单元互联。例如，数据中心网络系统包含576个机柜，共部署1个ZONE，6个POD和24个CELL，该数据中心网络系统中的每个CELL包含24个机柜，在不考虑双上行场景的情况下，每个机柜包含24台10GE服务器，则该 信号传输网络系统可容纳(576*24＝13824)台服务器。
基于所述ZONE，当所述源交换机和目的交换机位于不同的POD时，需要通过POD和POD之间的共用AWG实现信号传输。
参阅图13a所示，多个ZONE可通过水平扩展互联，其中，水平扩展可以通过扩展臂交换机实现；参阅图13b所示，多个ZONE也可以通过垂直扩展互联，其中，垂直扩展可以通过扩展臂交换机实现；进一步的，多个ZONE还可以通过自由扩展方式互联，即不按照上述标准扩展模式，任意组网，组网的形式不限，拓扑结构不限，用户可以根据具体应用场景任意设置。
采用上述技术方案，采用对等的小型设备实现全网连接，无须使用汇聚层设备和核心层设备，有效避免了网络瓶颈；并且，去中心化的网络结构也便于对数据中心网络的扩展，提高了系统可用性。
综上所述，本发明实施例中，数据中心网络系统采用星状网络拓扑结构，该星状网络拓扑结构以枢纽设备为中心，每一个枢纽设备与至少两个交换机之间存在通信连接，在每一个星状网络拓扑结构中，至少两个交换机中的至少一个交换机与至少一个服务器存在通信连接。采用本发明技术方案，每一个交换机均拥有与自身存在通信连接的枢纽设备，枢纽设备与交换机组成星状网络拓扑结构，相较于网状网络拓扑结构，星状网络拓扑结构中设备之间布线更少，因而能够有效降低网络布线数量，降低后续网络维护的工作量；并且，相较于目前的三层网络架构中，由源服务器发送至目的服务器的所有信号，均需要通过汇聚层设备和核心层设备进行转发，本发明实施例的数据中心网络系统中源服务器输出的信号依次通过与源服务器存在通信连接的源交换机，枢纽设备，以及与目的服务器存在通信连接的目的交换机，进而到达目的服务器，所有信号仅通过枢纽设备进行转发，相较于三层网络架构，信号转发的层级较少，从而有利于实现数据中心网络系统的网络结构扁平化，减少了核心层设备和汇聚层设备所造成的能耗，有效降低了系统能耗和设备维护成本；此外，在数据中心网络系统中还包括彩光模块，该彩光模块将服务器发送至交换机的电信号转化为光信号，使枢纽设备和彩光模块之间仅传 输光信号，由于光信号具备传输可靠性高，传输速度快，以及传输数据量大的优点，因此，本发明实施例的数据中心网络系统能够承载更为庞大的数据量，且提高了信号传输的可靠性和传输效率。
本领域内的技术人员应明白，本发明的实施例可提供为方法、系统、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本发明是参照根据本发明实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管已描述了本发明的优选实施例，但本领域内的技术人员一旦得知了基本创造性概念，则可对这些实施例作出另外的变更和修改。所以，所附权 利要求意欲解释为包括优选实施例以及落入本发明范围的所有变更和修改。
显然，本领域的技术人员可以对本发明实施例进行各种改动和变型而不脱离本发明实施例的精神和范围。这样，倘若本发明实施例的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (11)

  1. 一种数据中心网络系统，其特征在于，包括一个枢纽设备，至少两个交换机，多个彩光模块，至少两个合波/分波器，以及至少两个服务器，其中：
    所述至少两个交换机中的至少一个交换机与至少一个服务器存在通信连接，且每一个交换机的不同输入/输出端口与不同的彩光模块存在通信连接；
    与每个交换机的不同输入/输出端口存在通信连接的不同彩光模块均与一个合波/分波器存在通信连接，其中，不同的交换机通过彩光模块与不同的合波/分波器通信连接；
    所述至少两个交换机通过所述合波/分波器与所述一个枢纽设备构成星状网络拓扑结构，所述枢纽设备分别通过不同的端口与不同的合波/分波器通信连接；
    所述交换机，用于接收至少两路电信号，并针对所述至少两路电信号中的每一路电信号分别按照下述针对第一路电信号的处理方式处理：确定与第一路电信号中携带的目的地址对应的输入/输出端口，通过所述确定的输入/输出端口将所述第一路电信号输出；其中，所述目的地址用于指示目的服务器，与所述目的地址对应的输入/输出端口是指与所述目的服务器通信连接的目的交换机所对应的输入/输出端口，所述目的服务器为所述至少两个服务器中的一个服务器，所述目的交换机为与所述目的服务器通信连接的交换机；所述至少两路电信号包括以下任意一种或组合：与本交换机存在通信连接的服务器发送的电信号，以及，来自所述至少两个交换机中其他交换机的电信号；
    所述彩光模块，用于接收与自身存在通信连接的所述交换机的输入/输出端口输出的电信号，并将接收的所述电信号转换为特定波长的光信号，其中，与一个交换机的不同输入/输出端口存在通信连接的不同的彩光模块转换的光信号的波长是不同的；
    所述合波/分波器，用于接收与自身存在通信连接的多个彩光模块分别发 送的多个光信号，并将所述多个光信号波分复用成合路信号；
    所述枢纽设备，用于接收所述合波/分波器发送的合路信号，并将所述合路信号解复用，得到多个光信号；将所述多个光信号分别发送至与其中的每个光信号的目的交换机对应的端口，并将所述每个光信号从所述对应的端口输出，将从同一端口输出的光信号波分复用为合路信号；
    所述合波/分波器，进一步用于接收来自枢纽设备的合路信号，并将所述合路信号解复用，得到多个光信号，并将所述多个光信号分别输入与所述光信号的波长对应的彩光模块；
    所述彩光模块，进一步用于接收来自所述合波/分波器的光信号，并将所述光信号转换为电信号后输出给与自身存在通信连接的交换机的输入/输出端口；
    所述交换机，进一步用于将从彩光模块接收到的电信号转发给所述电信号的目的服务器。
  2. 如权利要求1所述的系统，其特征在于，所述系统还包括软件定义网络SDN控制器，所述SDN控制器与系统中的每个交换机均存在通信连接：
    所述交换机，进一步用于接收至少一路电信号，并针对所述至少一路电信号中的每一路电信号分别按照下述针对第二路电信号的处理方式处理：确定与第二路电信号中携带的目的地址对应的输入/输出端口，在与第二路电信号中携带的目的地址对应的输入/输出端口负载过载时，向所述SDN控制器发送负载过载的通知；
    所述SDN控制器，用于在接收到交换机发送的所述通知时，在发送所述通知的交换机的各个输入/输出端口中，除与第二路电信号的目的地址对应的输入/输出端口之外的其他输入/输出端口中选择至少一个输入/输出端口，并将选择的至少一个输入/输出端口反馈给所述发送所述通知的交换机；
    所述至少两个交换机中，向所述SDN控制器发送通知的交换机，进一步用于将接收的所述至少一路电信号通过所述SDN控制器反馈的至少一个输入/输出端口输出。
  3. 如权利要求2所述的系统，其特征在于，所述SDN控制器选择的至少一个输入/输出端口为所述发送所述通知的交换机的输入/输出端口中负载量最小的至少一个输入/输出端口。
  4. 如权利要求2所述的系统，其特征在于，所述SDN控制器按照负载均衡原则，在发送所述通知的交换机的各个输入/输出端口中，除与第二路电信号的目的地址对应的输入/输出端口之外的其他输入/输出端口中选择至少一个输入/输出端口。
  5. 如权利要求1～4任一所述的系统，其特征在于，所述多个彩光模块中至少有一个彩光模块位于与自身存在通信连接的交换机的内部。
  6. 如权利要求1～5任一所述的系统，其特征在于，所述枢纽设备为阵列波导光栅AWG。
  7. 一种信号传输系统，其特征在于，包含至少两个星状网络拓扑结构,每个所述星状网络拓扑结构包括一个枢纽设备，至少两个交换机，多个彩光模块，至少两个合波/分波器，以及至少两个服务器，所述至少两个星状网络拓扑结构内的枢纽设备存在通信连接，
    其中，在一个所述星状网络拓扑结构内：所述至少两个交换机中的至少一个交换机与至少一个服务器存在通信连接，且每一个交换机的不同输入/输出端口与不同的彩光模块存在通信连接，与每个交换机的不同输入/输出端口存在通信连接的不同彩光模块均与一个合波/分波器存在通信连接，其中，不同的交换机通过彩光模块与不同的合波/分波器通信连接，所述至少两个交换机通过所述合波/分波器与所述一个枢纽设备构成星状网络拓扑结构，所述枢纽设备分别通过不同的端口与不同的合波/分波器通信连接；
    在任意两个所述星状网络拓扑结构之间：其中一个所述星状网络拓扑结构内的所述交换机，用于接收至少两路电信号，并针对所述至少两路电信号中的每一路电信号分别按照下述针对第一路电信号的处理方式处理：确定与第一路电信号中携带的目的地址对应的输入/输出端口，通过所述确定的输入/输出端口将所述第一路电信号输出；其中，所述目的地址用于指示目的服务 器，与所述目的地址对应的输入/输出端口是指与所述目的服务器通信连接的目的交换机所对应的输入/输出端口，所述目的服务器为另一个星状网络拓扑结构内的服务器，所述目的交换机为与所述目的服务器通信连接的交换机；所述至少两路电信号包括以下任意一种或组合：与本交换机存在通信连接的服务器发送的电信号，来自与本交换机属于同一星状网络拓扑结构的其他交换机的电信号，以及来自与本交换机属于不同星状网络拓扑结构的交换机的电信号；
    所述彩光模块，用于接收与自身存在通信连接的所述交换机的输入/输出端口输出的电信号，并将接收的所述电信号转换为特定波长的光信号，其中，与一个交换机的不同输入/输出端口存在通信连接的不同的彩光模块转换的光信号的波长是不同的；
    所述合波/分波器，用于接收与自身存在通信连接的多个彩光模块分别发送的多个光信号，并将所述多个光信号波分复用成合路信号；
    所述枢纽设备，用于接收与所述枢纽设备位于同一星状网络拓扑结构的合波/分波器发送的合路信号，和/或，与所述枢纽设备位于不同星状网络拓扑结构的枢纽设备发送的合路信号，并将所述合路信号解复用，得到多个光信号；将所述多个光信号分别发送至与其中的每个光信号的目的交换机对应的端口，并将所述每个光信号从所述对应的端口输出，将从同一端口输出的光信号波分复用为合路信号，其中，得到的所述多个光信号中至少一个光信号的目的交换机位于另一个星状网络拓扑结构，所述目的交换机位于另一个星状网络拓扑结构的光信号通过所述枢纽设备的一个端口输出，并传输至另一个枢纽设备；
    所述合波/分波器，进一步用于接收来自与自身存在通信连接的枢纽设备的合路信号，并将所述合路信号解复用，得到多个光信号，并将所述多个光信号分别输入与所述光信号的波长对应的彩光模块；
    所述彩光模块，进一步用于接收来自与自身存在通信连接的所述合波/分波器的光信号，并将所述光信号转换为电信号后输出给与自身存在通信连接 的交换机的输入/输出端口；
    所述交换机，进一步用于将从与自身存在通信连接的彩光模块接收到的电信号转发给所述电信号的目的服务器。
  8. 如权利要求7所述的系统，其特征在于，所述系统还包括软件定义网络SDN控制器，所述SDN控制器与系统中的每个交换机均存在通信连接：
    所述交换机，进一步用于接收至少一路电信号，并针对所述至少一路电信号中的每一路电信号分别按照下述针对第二路电信号的处理方式处理：确定与第二路电信号中携带的目的地址对应的输入/输出端口，在与第二路电信号中携带的目的地址对应的输入/输出端口负载过载时，向所述SDN控制器发送负载过载的通知；
    所述SDN控制器，用于在接收到交换机发送的所述通知时，在发送所述通知的交换机的各个输入/输出端口中，除与第二路电信号的目的地址对应的输入/输出端口之外的其他输入/输出端口中选择至少一个输入/输出端口，并将选择的至少一个输入/输出端口反馈给所述发送所述通知的交换机；
    所述至少两个交换机中，向所述SDN控制器发送通知的交换机，进一步用于将接收的所述至少一路电信号通过所述SDN控制器反馈的至少一个输入/输出端口输出。
  9. 如权利要求8所述的系统，其特征在于，所述SDN控制器选择的至少一个输入/输出端口为所述发送所述通知的交换机的输入/输出端口中负载量最小的至少一个输入/输出端口。
  10. 如权利要求8所述的系统，其特征在于，所述SDN控制器按照负载均衡原则，在发送所述通知的交换机的各个输入/输出端口中，除与第二路电信号的目的地址对应的输入/输出端口之外的其他输入/输出端口中选择至少一个输入/输出端口。
  11. 如权利要求7～10任一所述的系统，其特征在于，所述系统还包括扩展臂交换机，所述枢纽设备通过所述扩展臂交换机与其他至少一个枢纽设备通信连接。
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