CN102882811B - Based on data center light interconnection network system and the communication means of array waveguide grating - Google Patents
Based on data center light interconnection network system and the communication means of array waveguide grating Download PDFInfo
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Abstract
The invention discloses a kind of large-scale data center light interconnected network system based on array waveguide grating and communication means, mainly solve the problem that utilization rate of equipment and installations in existing optical-fiber network is low and construction cost is large.Network system of the present invention comprises P layer network structure, and every layer has K bunch, and each bunch is connected and composed by two convergence switches and K+1 frame, and wherein, each frame is connected and composed by an edge of table switch and K-1 station server; Between each bunch by the edge switch of specifying as bunch between forward switch and be interconnected; Edge switch by specifying between each layer forwards switch as interlayer and is interconnected; Utilize the wavelength division multiplexing characteristic of array waveguide grating during communication, flow is distributed to each edge switch, realize light packet switching.The present invention under the prerequisite ensureing network performance, can effectively improve the utilance of array waveguide grating in network, reduces the construction cost of network, and reduces the complexity of wiring.
Description
Technical field
The invention belongs to Internet technical field, be specifically related to the light interconnection network system of data center, can be used for the efficient communication realized between data center server.
Background technology
Along with the development of cloud computing technology, data center needs to process vast resources, and traditional data center's electric network framework is high by self energy consumption, and wiring is complicated, and the restriction of the problems such as transmission rate is limited, is difficult to meet the demands.Because light network itself has the characteristic of high bandwidth and low energy consumption, therefore optical interconnection network becomes the focus that researcher pays close attention to.Current optical switch is mostly based on MEMS (MicroelectromechanicalSystem), there is transmission rate fast, low power consumption and other advantages, but inevitably bring two large problems: first, it is long that network reconfigures the time, when network complete a data transfer need the time delay of Millisecond just can reconfigure optical circuit carry out next time transmission, time delay large is like this that data center can not bear.The second, control circuit is complicated, needs to realize accurately upset to each MEMS minute surface, thus need the control circuit of complexity owing to changing circuit connection.Given this, the switching network plan based on array waveguide grating switch becomes study hotspot.Article " DOS-AScalableOpticalSwitchforDatacenters " (InProceedingsofArchitecturesforNetworkingandCommunicatio nsSystems) proposes a kind of single switch star network topology based on array waveguide grating, but because the program have employed the network topology structure of star, network size is very limited.Article " BufferlessOpticalClosSwitchesforDataCenters " (InProceedingsofOpticalFiberCommunicationConferenceandExp osition) proposes to utilize clos network by array waveguide grating cascade, as the switch of core layer.But, the redundancy that the program causes network too much to obtain high-performance, link and array waveguide grating utilance lower, be limited to extended mode, the expansion of network size simultaneously, make the construction cost of network too high.Therefore, these network topology schemes can not meet the application demand to large-scale data center under cloud computing environment.
Summary of the invention
The object of the invention is to the deficiency for above-mentioned prior art, a kind of large-scale data center light interconnected network system based on array waveguide grating and communication means are proposed, under the prerequisite ensureing network high bandwidth and the contour performance of low delay, improve utilization rate of equipment and installations, reduce the construction cost of network.
For achieving the above object, the present invention is based on the large-scale data center light interconnected network system of array waveguide grating, comprise P layer network structure, every layer has K bunch, P >=1, K >=3, and P and K is integer, it is characterized in that:
Each bunch comprises:
With two convergence switches that 2 array waveguide gratings are formed, every platform convergence switch comprises K+1 to input/output port;
By K+1 the frame that K+1 edge of table switch and (K+1) × (K-1) station server are formed, every edge of table switch comprises two to up input/output port, input/output port between a pair bunch, and K-1 is to descending input/output port; Every station server comprises a pair input/output port;
Annexation in each bunch is:
The K+1 of First convergence switch is to input/output port, be connected with the up input/output port of the first couple of the K+1 edge of table switch in K+1 frame respectively, the K+1 of second convergence switch is connected with the up input/output port of the second couple of K+1 edge of table switch input/output port; Each frame connects and composes descending input/output port is corresponding with the I/O mouth of K-1 station server by the K-1 of an edge of table switch;
Annexation between K bunch is:
H edge of table switch in the first bunch is connected with the First edge switch in h bunch by input/output port between a pair bunch, in like manner, the n-th edge of table switch in m bunch is connected with the m edge of table switch in n-th bunch by input/output port between a pair bunch, wherein, and 2≤h≤K, 1≤m≤K, 1≤n≤K, m ≠ n, and h, m, n are integer;
Between each layer by K edge of table switch bunch between input/output port be connected.
Above-mentioned light interconnection network system, is characterized in that, between described each layer by K edge of table switch bunch between input/output port be connected, its annexation is:
The address setting every stratum server is: a, b, c, d, and edge switch address is a, b, c, 0, the address of convergence switch is: a, b, 0,0, wherein, a represents level number, b representative bunch number, c represents shelf number, d representative server number, 1≤a≤P, 1≤b≤K, 1≤c≤K+1,1≤d≤K-1, and a, b, c, d are integer;
In every one deck, address is v, w, K+1, and in the edge switch of 0 and lower one deck, address is v+1, w, w, the edge switch of 0 by bunch between input/output port connect, form cyberspace stereochemical structure, wherein, 1≤v≤P-1,1≤w≤K, and v, w are integer.
Above-mentioned light interconnection network system, it is characterized in that, edge switch, comprise: the wavelength multiplexer of array waveguide grating, controller, a K-1 optical label extractor, a K-1 optical delay line, a K-1 wavelength shifter, a K-1 2:1, a K-1 filter and three shared buffer memory modules, K is the number in one deck bunch, K >=3, and K is integer;
Described array waveguide grating, is provided with K+1 to input/output port, wherein:
Front K-1 input port connected mode is identical, and each input port is connected with the wavelength multiplexer of a 2:1, wavelength shifter, an optical delay line and an optical label extractor successively, forms K-1 input port of edge switch;
Front K-1 output port connected mode is identical, and each output port connects a filter, forms K-1 output port of edge switch;
K input port is connected with the first shared buffer memory module 1, and this first shared buffer memory module 1 is provided with two input ports, K output port and pair of control port; Two input ports form two uplink input end mouths of edge switch, a front K-1 output port is connected with K-1 wavelength multiplexer respectively, K output port and array waveguide grating K input port is connected, and pair of control port is connected with described controller;
K output port is connected with the second shared buffer memory module 2, and this second shared buffer memory module 2 is provided with K input port, two output ports and pair of control port; Two output ports form two up output ports of edge switch, and a front K-1 input port is connected with K-1 filter respectively, and K input port and array waveguide grating K output port is connected, and pair of control port is connected with controller;
K+1 input port is connected with the 3rd shared buffer memory module 3, and the 3rd shared buffer memory module 3 is provided with a pair input/output port and pair of control port; Input port between bunch of input port formation edge switch, output port and array waveguide grating K+1 input port is connected, and pair of control port is connected with controller;
Output port between bunch of K+1 output port formation edge switch;
Described controller, be provided with K+2 to input/output port, wherein, a front K-1 input port is connected with described K-1 optical label extractor respectively, a front K-1 output port is connected with a described K-1 wavelength shifter respectively, rear three pairs of input/output ports are connected with the 3rd shared buffer memory module 3 with the first described shared buffer memory module 1, second shared buffer memory module 2 respectively.
Above-mentioned light interconnection network system, the first wherein said shared buffer memory module 1 comprises: two 1:(K+1) wavelength demultiplexer, 2 × (K+1) individual optical-electrical converters, a memory, 2K-1 electrical to optical converter, the wavelength multiplexer of a K:1, a shared buffer memory controller, K is the number in one deck bunch, K >=3, and K is integer;
Described memory, is provided with 2 × (K+1) individual input ports, 2K-1 output port and u control port, u>0, and u is integer, wherein:
A front K+1 input port, by K+1 optical-electrical converter, is connected with first wavelength demultiplexer;
A rear K+1 input port, by 2 × (K+1)-(K+1) individual optical-electrical converter, is connected with second wavelength demultiplexer;
A front K-1 output port is connected with K-1 electrical to optical converter;
A rear K output port, is connected with a wavelength multiplexer by K electrical to optical converter;
U control port is connected with the corresponding ports of shared cache controller.
Above-mentioned light interconnection network system, the second wherein said shared buffer memory module 2, comprise: the wavelength demultiplexer of a 1:K, a 2K-1 optical-electrical converter, memory, 2 × (K+1) individual electricals to optical converter, two (K+1): the wavelength multiplexer of 1 and a shared buffer memory controller, K is the number in one deck bunch, K >=3, and K is integer;
Described memory, is provided with 2K-1 input port, 2 × (K+1) individual output ports and u control port, u be greater than 0 integer, wherein:
A front K-1 input port is connected with K-1 optical-electrical converter;
A rear K input port, by K optical-electrical converter, is connected with a wavelength demultiplexer;
A front K+1 output port, is connected with first wavelength multiplexer by K+1 electrical to optical converter;
A rear K+1 output port, is connected with second wavelength multiplexer by 2 × (K+1)-(K+1) individual electrical to optical converter;
U control port is connected with the corresponding ports of shared cache controller.
Above-mentioned light interconnection network system, the 3rd wherein said shared buffer memory module 3 comprises: the wavelength demultiplexer of a 1:K, K optical-electrical converter, a memory, K electrical to optical converter, the wavelength multiplexer of a K:1, a shared buffer memory controller, K is the number in one deck bunch, K >=3, and K is integer;
Described memory, is provided with K input port, K output port and u control port, u>0, and u is integer, wherein:
K input port is connected with a wavelength demultiplexer by K optical-electrical converter;
K output port is connected with a wavelength multiplexer by K electrical to optical converter;
U control port is connected with the corresponding ports of shared cache controller.
The present invention is based on the communication means of the large-scale data center light interference networks of array waveguide grating for achieving the above object, comprise the steps:
(1) defining server address is: a, b, c, d, and edge switch address is a, b, c, 0; The address of convergence switch is: a, b, 0,0, wherein, a represents level number, b representative bunch number, c represents shelf number, d representative server number, 1≤a≤P, 1≤b≤K, 1≤c≤K+1,1≤d≤K-1, and a, b, c, d are integer, and K is the number in one deck bunch, K >=3, and K is integer;
(2) be v, w, K+1 with address in each layer, the edge switch of 0, as forwarding switch downwards, is v+1, w, w with address, the edge switch of 0 as upwards forwarding switch, wherein, 1≤v≤P-1,1≤w≤K, and v, w are integer;
(3) source server produces light data message, and source address is sent to edge switch with the form of optical label with destination address information together with light data message, and namely optical label is modulated at the short message on different wave length;
(4) edge switch extraction optical label carries out opto-electronic conversion, obtains source address and the destination address information of light data message, calculates the transmission wavelength of light data message through edge switch:
N
w＝(K+1+(D-S))mod(K+1)
In formula, N
wfor the transmission wavelength of light data message, D is the destination slogan of light data message, and S is the source port number of light data message;
(5) according to position and the wavelength N of destination server
w, send light data message respectively: if destination server is at this machine frame inside, light data message is modulated to wavelength N
w, be sent to destination server, communication completes; If destination server is not at this machine frame inside, light data message is modulated to wavelength N
w, be sent to up output port, carry out opto-electronic conversion;
(6) level number at edge switch inquiry destination server place, if destination server is at this layer, performs step (9); If destination server is on the upper strata of this edge switch, then the upwards forwarding switch in this edge switch bunch is forwarded switch as interlayer, if destination server is in the lower floor of this edge switch, then the downward forwarding switch in this edge switch bunch is forwarded switch as interlayer; Being stored into respectively in edge switch second shared buffer memory module 2 by electrical data signal breath forwards in two corresponding queues of switch with interlayer;
(7) according to the numbering of queue, electrical data signal breath is modulated on corresponding wavelength, by two convergence switches, arrive the uplink input end mouth that interlayer forwards switch, after opto-electronic conversion, electrical data signal breath is stored in respectively interlayer forward switch first shared buffer memory module 1 with bunch between in corresponding K the queue of output port;
(8) number according to the difference of queue, electrical data signal is ceased electro-optic conversion, with different wavelength, simultaneously arrive bunch between output port, arrive again target zone respective edges switch bunch between input port, after opto-electronic conversion, electrical data signal breath is stored in K queue of edge switch the 3rd shared buffer memory module 3 respectively, again through electro-optic conversion, respectively with K output port before different wavelength arrival edge switch, wherein a front K-1 output port utilizes the function of filters filter wavelength, light data message is made finally to arrive K output port, carry out opto-electronic conversion,
(9) judge destination server whether in this bunch, if destination server is in this bunch, perform step (12); If not in this bunch, the edge switch finding this bunch of interior framework number to equal object bunch number as bunch between forward switch, electrical data signal breath is stored into respectively in the second shared buffer memory module 2 with bunch between forward in two corresponding queues of switch and go;
(10) electrical data signal is ceased electro-optic conversion, the uplink input end mouth place of switch is forwarded between being arrived bunch by two convergence switches, by light data message opto-electronic conversion, forward between being stored into respectively bunch switch first shared buffer memory module 1 with bunch between in corresponding K the queue of output port, through electro-optic conversion, with different wavelength, simultaneously arrive bunch between output port, arrive again object bunch respective edges switch bunch between input port place, opto-electronic conversion is carried out to light data message;
(11) electrical data signal breath is stored in K queue of edge switch the 3rd shared buffer memory module 3 respectively, through electro-optic conversion, respectively with K output port before different wavelength arrival edge switch, wherein a front K-1 output port utilizes filter by the data information transfer of required wavelength to K output port, carries out opto-electronic conversion;
(12) electrical data signal breath is stored in two queues of corresponding object edge switch respectively, after electro-optic conversion, the uplink input end mouth of object edge switch is arrived by two convergence switches, through opto-electronic conversion, electrical data signal breath is stored in corresponding queue according to the numbering of destination server;
(13) carry out electro-optic conversion to the electrical data signal breath of different queue, be sent to destination server respectively, communication completes.
The present invention compared with prior art has the following advantages:
1. the present invention proposes a kind of large-scale data center light interconnected network system based on array waveguide grating, the network system solved based on MEMS optical switch reconfigures the long problem of light path time delay, achieves data center's optical-fiber network of low delay;
2. the present invention takes full advantage of the wavelength division multiplexing feature of array waveguide grating, under the prerequisite ensureing network high bandwidth, decreases the number of array waveguide grating in network, reduces the construction cost of network, and reduce the complexity of wiring;
3. the flow in network is reasonably distributed to different edge switch by the present invention, overcomes the shortcoming that current data center network flow converges at high level, have effectively achieved flow equalization;
4. the present invention is owing to have employed control strategy in a distributed manner, overcomes the problem of the high radix optical switch expansion difficulty that available data center light network centralized control is brought, ensures that network has good autgmentability.
Accompanying drawing explanation
Fig. 1 is the data center light interconnection network system schematic diagram that the present invention is based on array waveguide grating;
Fig. 2 is the data center light interconnection network system single layer structure schematic diagram that the present invention is based on array waveguide grating;
Fig. 3 is the structural representation of edge switch of the present invention;
Fig. 4 is three shared buffer memory modular structure schematic diagrames of edge switch of the present invention;
Fig. 5 is the flow chart of the data center light interconnection network communication means that the present invention is based on array waveguide grating.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described further:
With reference to Fig. 1, the present invention is based on the data center light interconnection network system of array waveguide grating, comprise P layer network structure, P >=1, and P is integer, this example P gets 3, and every layer has K bunch, K >=3 and K is integer, and this example K gets 3, as shown in Figure 2;
With reference to Fig. 2, every one deck comprises 3 bunches, and each bunch comprises: two convergence switches, 4 edge of table switches and 8 station servers;
Every edge of table switch, comprise two to up input/output port, input/output port between a pair bunch, two to descending input/output port; Every station server comprises a pair input/output port, and every platform convergence switch is formed by an array waveguide grating, and it comprises 4 pairs of input/output ports;
Annexation in each bunch is: the descending input/output port of two couples of each edge of table switch is corresponding with the I/O mouth of two-server to be connected, and forms 4 frames; 4 pairs of input/output ports of First convergence switch, be connected with the up input/output port of the first couple of 4 edge of table switches in 4 frames respectively, 4 pairs of input/output ports of second convergence switch are connected with the up input/output port of the second couple of 4 edge of table switches respectively;
Annexation between each bunch is: the second edge of table switch in first bunch and the 3rd edge of table switch are connected by input/output port between a pair bunch with the First edge switch in three bunch with the second bunch respectively, and the 3rd edge of table switch in second bunch and the second edge of table switch in three bunch are connected by input/output port between a pair bunch;
The interlayer structure relation of P layer network is: the address setting every stratum server is: a, b, c, d, and edge switch address is a, b, c, 0, the address of convergence switch is: a, b, 0,0, wherein, a represents level number, b representative bunch number, c represents shelf number, d representative server number, 1≤a≤P, 1≤b≤K, 1≤c≤K+1,1≤d≤K-1, and a, b, c, d are integer;
In every one deck, address is v, w, K+1, and in the edge switch of 0 and lower one deck, address is v+1, w, w, the edge switch of 0 by bunch between input/output port connect, form cyberspace stereochemical structure, wherein, 1≤v≤P-1,1≤w≤K, and v, w are integer;
The network configuration of this example has three layers, wherein:
In ground floor, the address of two convergence switches of bunch 1 is (1,1,0,0), and the address of 4 edge of table switches is from left to right respectively (1,1,1,0), (1,1,2,0), (1,1,3,0), (1, Isosorbide-5-Nitrae, 0), the address of 8 station servers is from left to right respectively (1,1,1,1), (1,1,1,2), (1,1,2,1), (1,1,2,2), (1,1,3,1), (1,1,3,2), (1, Isosorbide-5-Nitrae, 1), (1, Isosorbide-5-Nitrae, 2); In ground floor, the address of two convergence switches of bunches 2 is (1,2,0,0), and the address of 4 edge of table switches is from left to right respectively (1,2,1,0), (1,2,2,0), (1,2,3,0), (1,2,4,0), the address of 8 station servers is from left to right respectively (1,2,1,1), (1,2,1,2), (1,2,2,1), (1,2,2,2), (1,2,3,1), (1,2,3,2), (1,2,4,1), (1,2,4,2); In ground floor, the address of two convergence switches of bunches 3 is (1,3,0,0), and the address of 4 edge of table switches is from left to right respectively (1,3,1,0), (1,3,2,0), (1,3,3,0), (1,3,4,0), the address of 8 station servers is from left to right respectively (1,3,1,1), (1,3,1,2), (1,3,2,1), (1,3,2,2), (1,3,3,1), (1,3,3,2), (1,3,4,1), (1,3,4,2);
In the second layer, the address of two convergence switches of bunch 1 is (2,1,0,0), and the address of 4 edge of table switches is from left to right respectively (2,1,1,0), (2,1,2,0), (2,1,3,0), (2, Isosorbide-5-Nitrae, 0), the address of 8 station servers is from left to right respectively (2,1,1,1), (2,1,1,2), (2,1,2,1), (2,1,2,2), (2,1,3,1), (2,1,3,2), (2, Isosorbide-5-Nitrae, 1), (2, Isosorbide-5-Nitrae, 2); In the second layer, the address of two convergence switches of bunches 2 is (2,2,0,0), and the address of 4 edge of table switches is from left to right respectively (2,2,1,0), (2,2,2,0), (2,2,3,0), (2,2,4,0), the address of 8 station servers is from left to right respectively (2,2,1,1), (2,2,1,2), (2,2,2,1), (2,2,2,2), (2,2,3,1), (2,2,3,2), (2,2,4,1), (2,2,4,2); In the second layer, the address of two convergence switches of bunches 3 is (2,3,0,0), and the address of 4 edge of table switches is from left to right respectively (2,3,1,0), (2,3,2,0), (2,3,3,0), (2,3,4,0), the address of 8 station servers is from left to right respectively (2,3,1,1), (2,3,1,2), (2,3,2,1), (2,3,2,2), (2,3,3,1), (2,3,3,2), (2,3,4,1), (2,3,4,2);
In third layer, the address of two convergence switches of bunch 1 is (3,1,0,0), and the address of 4 edge of table switches is from left to right respectively (3,1,1,0), (3,1,2,0), (3,1,3,0), (3, Isosorbide-5-Nitrae, 0), the address of 8 station servers is from left to right respectively (3,1,1,1), (3,1,1,2), (3,1,2,1), (3,1,2,2), (3,1,3,1), (3,1,3,2), (3, Isosorbide-5-Nitrae, 1), (3, Isosorbide-5-Nitrae, 2); In third layer, the address of two convergence switches of bunches 2 is (3,2,0,0), and the address of 4 edge of table switches is from left to right respectively (3,2,1,0), (3,2,2,0), (3,2,3,0), (3,2,4,0), the address of 8 station servers is from left to right respectively (3,2,1,1), (3,2,1,2), (3,2,2,1), (3,2,2,2), (3,2,3,1), (3,2,3,2), (3,2,4,1), (3,2,4,2); In third layer, the address of two convergence switches of bunches 3 is (3,3,0,0), and the address of 4 edge of table switches is from left to right respectively (3,3,1,0), (3,3,2,0), (3,3,3,0), (3,3,4,0), the address of 8 station servers is from left to right respectively (3,3,1,1), (3,3,1,2), (3,3,2,1), (3,3,2,2), (3,3,3,1), (3,3,3,2), (3,3,4,1), (3,3,4,2).
During networking, by address in ground floor be (1, Isosorbide-5-Nitrae, 0), (1,2,4,0), (1,3,4,0) edge switch is (2,1,1,0) respectively with address in the second layer, (2,2,2,0), the edge switch of (2,3,3,0) is connected by input/output port between its bunch; Be (2, Isosorbide-5-Nitrae, 0) by address in the second layer, (2,2,4,0), the edge switch of (2,3,4,0) is (3 with address in third layer respectively, 1,1,0), (3,2,2,0), (3,3,3,0) edge switch is connected by input/output port between its bunch, forms cyberspace stereochemical structure.
With reference to Fig. 3, edge switch, comprise: an array waveguide grating, a controller, two optical label extractors, two optical delay lines, two wavelength shifters, the wavelength multiplexer of two 2:1, two filters and three shared buffer memory modules, these parts are except shared buffer memory module, and other are all existing device or module.
Described array waveguide grating, has 4 pairs of input/output ports, wherein:
The first two input port connected mode is identical, and each input port is connected with the wavelength multiplexer of a 2:1, wavelength shifter, an optical delay line and an optical label extractor successively, forms two input ports of edge switch;
The first two output port connected mode is identical, and each output port connects a filter, forms two output ports of edge switch;
3rd input port is connected with the first shared buffer memory module 1, and this first shared buffer memory module 1 has two input ports, 3 output ports and pair of control port; Two input ports form two uplink input end mouths of edge switch, the first two output port is connected with two wavelength multiplexer respectively, 3rd output port is connected with the 3rd input port of array waveguide grating, and pair of control port is connected with described controller;
3rd output port is connected with the second shared buffer memory module 2, and this second shared buffer memory module 2 has 3 input ports, two output ports and pair of control port; Two output ports form two up output ports of edge switch, and the first two input port is connected with two filters respectively, and the 3rd input port is connected with the 3rd output port of array waveguide grating, and pair of control port is connected with controller;
4th input port is connected with the 3rd shared buffer memory module 3, and the 3rd shared buffer memory module 3 has a pair input/output port and pair of control port; Input port between bunch of input port formation edge switch, output port and array waveguide grating the 4th input port is connected, and pair of control port is connected with controller;
Output port between bunch of the 4th output port formation edge switch.
Described controller, there are 5 pairs of input/output ports, wherein, the first two input port is connected with described two optical label extractors respectively, the first two output port is connected with described two wavelength shifters respectively, rear three pairs of input/output ports are connected with the 3rd shared buffer memory module 3 with the first described shared buffer memory module 1, second shared buffer memory module 2 respectively.
With reference to Fig. 4, be three shared buffer memory modules of the present invention, respectively as Fig. 4 (a), Fig. 4 (b), shown in Fig. 4 (c), wherein:
The first shared buffer memory module 1 shown in Fig. 4 (a), comprising: the wavelength demultiplexer of two 1:4,8 optical-electrical converters, a memory, 5 electricals to optical converter, the wavelength multiplexer of a 3:1, a shared buffer memory controller; Wherein: memory is provided with 8 input ports, 5 output ports and 8 control ports; Front 4 input ports, by 4 optical-electrical converters, are connected with first wavelength demultiplexer; Rear 4 input ports, by 4 optical-electrical converters, are connected with second wavelength demultiplexer; The first two output port is connected with two electricals to optical converter; Rear 3 output ports, are connected with a wavelength multiplexer by 3 electricals to optical converter; 8 control ports are connected with the corresponding ports of shared cache controller.
The second shared buffer memory module 2 shown in Fig. 4 (b), comprising: the wavelength multiplexer of the wavelength demultiplexer of a 1:3,5 optical-electrical converters, a memory, 8 electricals to optical converter, two 4:1 and a shared buffer memory controller; Wherein: memory is provided with 5 input ports, 8 output ports and 8 control ports; The first two input port is connected with two optical-electrical converters; Rear 3 input ports, by 3 optical-electrical converters, are connected with a wavelength demultiplexer; Front 4 output ports, are connected with first wavelength multiplexer by 4 electricals to optical converter; Rear 4 output ports, are connected with second wavelength multiplexer by 4 electricals to optical converter; 8 control ports are connected with shared cache controller corresponding ports.
The 3rd shared buffer memory module 3 shown in Fig. 4 (c), comprising: the wavelength demultiplexer of a 1:3,3 optical-electrical converters, a memory, 3 electricals to optical converter, the wavelength multiplexer of a 3:1, a shared buffer memory controller; Wherein: memory is provided with 3 input ports, 3 output ports and 3 control ports; 3 input ports are connected with a wavelength demultiplexer by 3 optical-electrical converters; 3 output ports are connected with a wavelength multiplexer by 3 electricals to optical converter; 3 control ports are connected with the corresponding ports of shared cache controller.
With reference to Fig. 5, the present invention is based on the communication means of the large-scale data center light interconnected network system of array waveguide grating, comprise the steps:
Step 1, definition server address is: a, b, c, d, and edge switch address is a, b, c, 0; The address of convergence switch is: a, b, 0,0, wherein, a represents level number, b representative bunch number, c represents shelf number, d representative server number, 1≤a≤P, 1≤b≤K, 1≤c≤K+1,1≤d≤K-1, and a, b, c, d are integer, and K is the number in one deck bunch, K >=3, and K is integer;
The network configuration of this example has three layers, wherein:
In ground floor, the address of two convergence switches of bunch 1 is (1,1,0,0), and the address of 4 edge of table switches is from left to right respectively (1,1,1,0), (1,1,2,0), (1,1,3,0), (1, Isosorbide-5-Nitrae, 0), the address of 8 station servers is from left to right respectively (1,1,1,1), (1,1,1,2), (1,1,2,1), (1,1,2,2), (1,1,3,1), (1,1,3,2), (1, Isosorbide-5-Nitrae, 1), (1, Isosorbide-5-Nitrae, 2); In ground floor, the address of two convergence switches of bunches 2 is (1,2,0,0), and the address of 4 edge of table switches is from left to right respectively (1,2,1,0), (1,2,2,0), (1,2,3,0), (1,2,4,0), the address of 8 station servers is from left to right respectively (1,2,1,1), (1,2,1,2), (1,2,2,1), (1,2,2,2), (1,2,3,1), (1,2,3,2), (1,2,4,1), (1,2,4,2); In ground floor, the address of two convergence switches of bunches 3 is (1,3,0,0), and the address of 4 edge of table switches is from left to right respectively (1,3,1,0), (1,3,2,0), (1,3,3,0), (1,3,4,0), the address of 8 station servers is from left to right respectively (1,3,1,1), (1,3,1,2), (1,3,2,1), (1,3,2,2), (1,3,3,1), (1,3,3,2), (1,3,4,1), (1,3,4,2);
In the second layer, the address of two convergence switches of bunch 1 is (2,1,0,0), and the address of 4 edge of table switches is from left to right respectively (2,1,1,0), (2,1,2,0), (2,1,3,0), (2, Isosorbide-5-Nitrae, 0), the address of 8 station servers is from left to right respectively (2,1,1,1), (2,1,1,2), (2,1,2,1), (2,1,2,2), (2,1,3,1), (2,1,3,2), (2, Isosorbide-5-Nitrae, 1), (2, Isosorbide-5-Nitrae, 2); In the second layer, the address of two convergence switches of bunches 2 is (2,2,0,0), and the address of 4 edge of table switches is from left to right respectively (2,2,1,0), (2,2,2,0), (2,2,3,0), (2,2,4,0), the address of 8 station servers is from left to right respectively (2,2,1,1), (2,2,1,2), (2,2,2,1), (2,2,2,2), (2,2,3,1), (2,2,3,2), (2,2,4,1), (2,2,4,2); In the second layer, the address of two convergence switches of bunches 3 is (2,3,0,0), and the address of 4 edge of table switches is from left to right respectively (2,3,1,0), (2,3,2,0), (2,3,3,0), (2,3,4,0), the address of 8 station servers is from left to right respectively (2,3,1,1), (2,3,1,2), (2,3,2,1), (2,3,2,2), (2,3,3,1), (2,3,3,2), (2,3,4,1), (2,3,4,2);
In third layer, the address of two convergence switches of bunch 1 is (3,1,0,0), and the address of 4 edge of table switches is from left to right respectively (3,1,1,0), (3,1,2,0), (3,1,3,0), (3, Isosorbide-5-Nitrae, 0), the address of 8 station servers is from left to right respectively (3,1,1,1), (3,1,1,2), (3,1,2,1), (3,1,2,2), (3,1,3,1), (3,1,3,2), (3, Isosorbide-5-Nitrae, 1), (3, Isosorbide-5-Nitrae, 2); In third layer, the address of two convergence switches of bunches 2 is (3,2,0,0), and the address of 4 edge of table switches is from left to right respectively (3,2,1,0), (3,2,2,0), (3,2,3,0), (3,2,4,0), the address of 8 station servers is from left to right respectively (3,2,1,1), (3,2,1,2), (3,2,2,1), (3,2,2,2), (3,2,3,1), (3,2,3,2), (3,2,4,1), (3,2,4,2); In third layer, the address of two convergence switches of bunches 3 is (3,3,0,0), and the address of 4 edge of table switches is from left to right respectively (3,3,1,0), (3,3,2,0), (3,3,3,0), (3,3,4,0), the address of 8 station servers is from left to right respectively (3,3,1,1), (3,3,1,2), (3,3,2,1), (3,3,2,2), (3,3,3,1), (3,3,3,2), (3,3,4,1), (3,3,4,2).
Step 2, be v, w, K+1 with address in each layer, the edge switch of 0, as forwarding switch downwards, is v+1, w, w with address, the edge switch of 0 as upwards forwarding switch, wherein, 1≤v≤P-1,1≤w≤K, and v, w are integer;
In this example, for the ground floor of network, be (1 with address, 1, 4, 0), (1, 2, 4, 0), (1, 3, 4, 0) edge switch is as forwarding switch downwards, to the second layer, be (2 with address, 1, 1, 0), (2, 2, 2, 0), (2, 3, 3, 0) edge switch is as upwards forwarding switch, be (2 with address, 1, 4, 0), (2, 2, 4, 0), (2, 3, 4, 0) edge switch is as forwarding switch downwards, to third layer, be (3 with address, 1, 1, 0), (3, 2, 2, 0), (3, 3, 3, 0) edge switch is as upwards forwarding switch.
Step 3, source server produces light data message, and by source address and destination address information with the form of optical label, be sent to edge switch together with light data message, namely optical label is modulated at the short message on different wave length.
Step 4, edge switch extracts optical label and carries out opto-electronic conversion, obtains source address and the destination address information of light data message, calculates the transmission wavelength of light data message through edge switch:
N
w＝(4+(D-S))mod4，
In formula, N
wfor the transmission wavelength of light data message, D is the destination slogan of light data message, and S is the source port number of light data message.
Step 5, according to position and the wavelength N of destination server
w, send light data message respectively: if destination server is at this machine frame inside, light data message is modulated to wavelength N
w, be sent to destination server, communication completes; If destination server is not at this machine frame inside, light data message is modulated to wavelength N
w, be sent to up output port, carry out opto-electronic conversion.
Step 6, the level number at edge switch inquiry destination server place, if destination server is at this layer, performs step 9; If destination server is on the upper strata of this edge switch, then the upwards forwarding switch in this edge switch bunch is forwarded switch as interlayer, if destination server is in the lower floor of this edge switch, then the downward forwarding switch in this edge switch bunch is forwarded switch as interlayer; Electrical data signal breath is stored into this edge switch second shared buffer memory module 2 respectively forward in two corresponding queues of switch with interlayer.
Step 7, electrical data signal breath is modulated on corresponding wavelength by the numbering according to queue, by two convergence switches, arrives the uplink input end mouth that interlayer forwards switch; After opto-electronic conversion, electrical data signal breath is stored in respectively interlayer forward switch first shared buffer memory module 1 with bunch between in corresponding 3 queues of output port.
Step 8, difference according to queue is numbered, electrical data signal is ceased electro-optic conversion, with different wavelength, simultaneously arrive bunch between output port, arrive again target zone respective edges switch bunch between input port, after opto-electronic conversion, electrical data signal breath is stored in 3 queues of edge switch the 3rd shared buffer memory module 3 respectively, again through electro-optic conversion, front 3 output ports of edge switch are arrived respectively with different wavelength, wherein front 2 output ports utilize the function of filters filter wavelength, light data message is made finally to arrive the 3rd output port, carry out opto-electronic conversion.
Step 9, judges destination server whether in this bunch, if destination server is in this bunch, performs step 12; If not in this bunch, the edge switch finding this bunch of interior framework number to equal object bunch number as bunch between forward switch, electrical data signal breath is stored into respectively the second shared buffer memory module 2 with bunch between forward in two corresponding queues of switch.
Step 10, electrical data signal is ceased electro-optic conversion, the uplink input end mouth place of switch is forwarded between being arrived bunch by two convergence switches, by light data message opto-electronic conversion, the first shared buffer memory module 1 forwarding switch between being stored into respectively bunch with bunch between in corresponding 3 queues of output port, through electro-optic conversion, with different wavelength, simultaneously arrive bunch between output port, then arrive object bunch respective edges switch bunch between input port place, opto-electronic conversion is carried out to light data message.
Step 11, electrical data signal breath is on average stored in 3 queues of edge switch the 3rd shared buffer memory module 3, through electro-optic conversion, front 3 output ports of edge switch are arrived respectively with different wavelength, wherein front 2 output ports utilize filter by the data information transfer of required wavelength to the 3rd output port, carry out opto-electronic conversion.
Step 12, electrical data signal breath is stored in two queues of corresponding object edge switch, after electro-optic conversion, the uplink input end mouth of object edge switch is arrived by two convergence switches, through opto-electronic conversion, electrical data signal breath is stored in corresponding queue according to the numbering of destination server.
Step 13, carry out electro-optic conversion to the electrical data signal breath of different queue, be sent to destination server respectively, communication completes.
Claims (6)
1. based on a large-scale data center light interconnected network system for array waveguide grating, comprise P layer network structure, every layer has K bunch, P >=1, K >=3, and P and K is integer, it is characterized in that:
Each bunch comprises:
With two convergence switches that 2 array waveguide gratings are formed, every platform convergence switch comprises K+1 to input/output port;
By K+1 the frame that K+1 edge of table switch and (K+1) × (K-1) station server are formed, every edge of table switch comprises two to up input/output port, input/output port between a pair bunch, and K-1 is to descending input/output port; Every station server comprises a pair input/output port;
Annexation in each bunch is:
The K+1 of First convergence switch is to input/output port, be connected with the up input/output port of the first couple of the K+1 edge of table switch in K+1 frame respectively, the K+1 of second convergence switch is connected with the up input/output port of the second couple of K+1 edge of table switch input/output port; Each frame connects and composes descending input/output port is corresponding with the I/O mouth of K-1 station server by the K-1 of an edge of table switch;
Annexation between K bunch is:
H edge of table switch in the first bunch is connected with the First edge switch in h bunch by input/output port between a pair bunch, in like manner, the n-th edge of table switch in m bunch is connected with the m edge of table switch in n-th bunch by input/output port between a pair bunch, wherein, and 2≤h≤K, 1≤m≤K, 1≤n≤K, m ≠ n, and h, m, n are integer;
Between each layer by K edge of table switch bunch between input/output port be connected:
The address setting every stratum server is: a, b, c, d, and edge switch address is a, b, c, 0, the address of convergence switch is: a, b, 0,0, wherein, a represents level number, b representative bunch number, c represents shelf number, d representative server number, 1≤a≤P, 1≤b≤K, 1≤c≤K+1,1≤d≤K-1, and a, b, c, d are integer;
In every one deck, address is v, w, K+1, and in the edge switch of 0 and lower one deck, address is v+1, w, w, the edge switch of 0 by bunch between input/output port connect, form cyberspace stereochemical structure, wherein, 1≤v≤P-1,1≤w≤K, and v, w are integer.
2. light interconnection network system according to claim 1, it is characterized in that, edge switch, comprise: the wavelength multiplexer of array waveguide grating, controller, a K-1 optical label extractor, a K-1 optical delay line, a K-1 wavelength shifter, a K-1 2:1, a K-1 filter and the first shared buffer memory module (1), the second shared buffer memory module (2), the 3rd shared buffer memory module (3), K is the number in one deck bunch, K >=3, and K is integer;
Described array waveguide grating, is provided with K+1 to input/output port, wherein:
Front K-1 input port connected mode is identical, and each input port is connected with the wavelength multiplexer of a 2:1, wavelength shifter, an optical delay line and an optical label extractor successively, forms K-1 input port of edge switch;
Front K-1 output port connected mode is identical, and each output port connects a filter, forms K-1 output port of edge switch;
K input port is connected with the first shared buffer memory module (1), and this first shared buffer memory module (1) is provided with two input ports, K output port and pair of control port; Two input ports form two uplink input end mouths of edge switch, a front K-1 output port is connected with K-1 wavelength multiplexer respectively, K output port and array waveguide grating K input port is connected, and pair of control port is connected with described controller;
K output port is connected with the second shared buffer memory module (2), and this second shared buffer memory module (2) is provided with K input port, two output ports and pair of control port; Two output ports form two up output ports of edge switch, and a front K-1 input port is connected with K-1 filter respectively, and K input port and array waveguide grating K output port is connected, and pair of control port is connected with controller;
K+1 input port is connected with the 3rd shared buffer memory module (3), and the 3rd shared buffer memory module (3) is provided with a pair input/output port and pair of control port; Input port between bunch of input port formation edge switch, output port and array waveguide grating K+1 input port is connected, and pair of control port is connected with controller;
Output port between bunch of K+1 output port formation edge switch;
Described controller, be provided with K+2 to input/output port, wherein, a front K-1 input port is connected with described K-1 optical label extractor respectively, a front K-1 output port is connected with a described K-1 wavelength shifter respectively, rear three pairs of input/output ports respectively with the first described shared buffer memory module (1), the second shared buffer memory module (2) is connected with the 3rd shared buffer memory module (3).
3. light interconnection network system according to claim 2, the first wherein said shared buffer memory module (1) comprising: wavelength demultiplexer two 1:(K+1), 2 × (K+1) individual optical-electrical converters, a memory, 2K-1 electrical to optical converter, the wavelength multiplexer of a K:1, a shared buffer memory controller, K is the number in one deck bunch, K >=3, and K is integer;
Described memory, is provided with 2 × (K+1) individual input ports, 2K-1 output port and u control port, u>0, and u is integer, wherein:
A front K+1 input port, by K+1 optical-electrical converter, is connected with first wavelength demultiplexer;
A rear K+1 input port, by 2 × (K+1)-(K+1) individual optical-electrical converter, is connected with second wavelength demultiplexer;
A front K-1 output port is connected with K-1 electrical to optical converter;
A rear K output port, is connected with the wavelength multiplexer of a K:1 by K electrical to optical converter;
U control port is connected with the corresponding ports of shared cache controller.
4. light interconnection network system according to claim 2, the second wherein said shared buffer memory module (2), comprise: the wavelength demultiplexer of a 1:K, a 2K-1 optical-electrical converter, memory, 2 × (K+1) individual electricals to optical converter, two (K+1): the wavelength multiplexer of 1 and a shared buffer memory controller, K is the number in one deck bunch, K >=3, and K is integer;
Described memory, is provided with 2K-1 input port, 2 × (K+1) individual output ports and u control port, u > 0, and u is integer, wherein:
A front K-1 input port is connected with K-1 optical-electrical converter;
A rear K input port, by K optical-electrical converter, is connected with a wavelength demultiplexer;
A front K+1 output port, by K+1 electrical to optical converter and first (K+1): the wavelength multiplexer of 1 is connected;
A rear K+1 output port, by 2 × (K+1)-(K+1) individual electrical to optical converter and second (K+1): the wavelength multiplexer of 1 is connected;
U control port is connected with the corresponding ports of shared cache controller.
5. light interconnection network system according to claim 2, the 3rd wherein said shared buffer memory module (3) comprising: the wavelength demultiplexer of a 1:K, K optical-electrical converter, a memory, K electrical to optical converter, the wavelength multiplexer of a K:1, a shared buffer memory controller, K is the number in one deck bunch, K >=3, and K is integer;
Described memory, is provided with K input port, K output port and u control port, u>0, and u is integer, wherein:
K input port is connected with a wavelength demultiplexer by K optical-electrical converter;
K output port is connected with the wavelength multiplexer of a K:1 by K electrical to optical converter;
U control port is connected with the corresponding ports of shared cache controller.
6., based on a communication means for the large-scale data center light interference networks of array waveguide grating, comprise the steps:
(1) defining server address is: a, b, c, d, and edge switch address is a, b, c, 0; The address of convergence switch is: a, b, 0,0, wherein, a represents level number, b representative bunch number, c represents shelf number, d representative server number, 1≤a≤P, 1≤b≤K, 1≤c≤K+1,1≤d≤K-1, and a, b, c, d are integer, and K is the number in one deck bunch, K >=3, and K is integer;
(2) be v, w, K+1 with address in each layer, the edge switch of 0, as forwarding switch downwards, is v+1, w with address, w, the edge switch of 0 as upwards forwarding switch, wherein, 1≤v≤P-1,1≤w≤K, and v, w are integer, wherein P is the number of plies of network configuration, and value is 3;
(3) source server produces light data message, and source address is sent to edge switch with the form of optical label with destination address information together with light data message;
(4) edge switch extraction optical label carries out opto-electronic conversion, obtains source address and the destination address information of light data message, calculates the transmission wavelength of light data message through edge switch:
N
w＝(K+1+(D-S))mod(K+1)，
In formula, N
wfor the transmission wavelength of light data message, D is the destination slogan of light data message, and S is the source port number of light data message;
(5) according to position and the wavelength N of destination server
w, send light data message respectively: if destination server is at this machine frame inside, light data message is modulated to wavelength N
w, be sent to destination server, communication completes; If destination server is not at this machine frame inside, light data message is modulated to wavelength N
w, be sent to up output port, carry out opto-electronic conversion;
(6) level number at edge switch inquiry destination server place, if destination server is at this layer, performs step (9); If destination server is on the upper strata of this edge switch, then the upwards forwarding switch in this edge switch bunch is forwarded switch as interlayer, if destination server is in the lower floor of this edge switch, then the downward forwarding switch in this edge switch bunch is forwarded switch as interlayer; Being stored into respectively in edge switch second shared buffer memory module (2) by electrical data signal breath forwards in two corresponding queues of switch with interlayer;
(7) according to the numbering of queue, electrical data signal breath is modulated on corresponding wavelength, by two convergence switches, arrive the uplink input end mouth that interlayer forwards switch, after opto-electronic conversion, electrical data signal breath is stored in respectively interlayer and forwards in K queue of output port between corresponding bunch in switch first shared buffer memory module (1);
(8) number according to the difference of queue, electrical data signal is ceased electro-optic conversion, with different wavelength, simultaneously arrive bunch between output port, arrive again target zone respective edges switch bunch between input port, after opto-electronic conversion, electrical data signal breath is stored in K queue of edge switch the 3rd shared buffer memory module (3) respectively, again through electro-optic conversion, respectively with K output port before different wavelength arrival edge switch, wherein a front K-1 output port utilizes the function of filters filter wavelength, light data message is made finally to arrive K output port, carry out opto-electronic conversion,
(9) judge destination server whether in this bunch, if destination server is in this bunch, perform step (12); If not in this bunch, the edge switch finding this bunch of interior framework number to equal object bunch number as bunch between forward switch, electrical data signal breath is stored into respectively in the second shared buffer memory module (2) with bunch between forward in two corresponding queues of switch and go;
(10) electrical data signal is ceased electro-optic conversion, the uplink input end mouth place of switch is forwarded between being arrived bunch by two convergence switches, by light data message opto-electronic conversion, forward in K queue of output port between corresponding bunch in switch first shared buffer memory module (1) between being stored into respectively bunch, through electro-optic conversion, with different wavelength, simultaneously arrive bunch between output port, arrive again object bunch respective edges switch bunch between input port place, opto-electronic conversion is carried out to light data message;
(11) electrical data signal breath is stored in K queue of edge switch the 3rd shared buffer memory module (3) respectively, through electro-optic conversion, respectively with K output port before different wavelength arrival edge switch, wherein a front K-1 output port utilizes filter by the data information transfer of required wavelength to K output port, carries out opto-electronic conversion;
(12) electrical data signal breath is stored in two queues of corresponding object edge switch respectively, after electro-optic conversion, the uplink input end mouth of object edge switch is arrived by two convergence switches, through opto-electronic conversion, electrical data signal breath is stored in corresponding queue according to the numbering of destination server;
(13) carry out electro-optic conversion to the electrical data signal breath of different queue, be sent to destination server respectively, communication completes.
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