CN101277547A - Large-scale strict non-blockage light-crossing connection matrix structure and control method thereof - Google Patents
Large-scale strict non-blockage light-crossing connection matrix structure and control method thereof Download PDFInfo
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Abstract
The present invention provides a large-scale strictly nonblocking optical switching matrix structure and its control method. The optical switching matrix structure is a three-level symmetrical CLOS network, including an input level composed of r n*m optical switch module; a middle level composed of m r*r optical switch module; an output level composed of r m*n optical switch module, a symmetrical switching connection is between the three-level optical switching modules. The invention has advantages that the switching connection is routed configuration by large capacity connection fit for large scale optical switching; the matrix realizes the switching of N*N optical route, and when m>=2n-1, the matrix has strictly nonblocking ability, that is meeting the requirement of non error code produced by the non switching route when selecting the route, ensuring less optical switch generation switching as possible in each configuration; the invention has high efficient algorithm, accuracy and credibility, if the aim output state has N different states with the initial output states, only counting N times.
Description
Technical field
The present invention relates to the allocation plan and the control method thereof of optical cross connect in optical communication and the optical-fiber network transmission channel, particularly a kind of large-scale strict non-blockage light-crossing connection matrix structure and control method thereof.
Background technology
Along with the broadband high speed development of communication network, international, domestic telecommunication market scale has been turned over several times, and optical fiber is laid as the main medium of telecommunication transmission and spreaded all over each corner.But in telecom operation department, still adopt the mode of artificial optical fiber distributing carry out optical line by switching, artificial wiring efficiency is low, is not suitable for large-scale route switching, can not realize automaticallying switch but also has Route Blocking.Though minority telecom operation department begins to attempt adopting the optical cross connect module to carry out optical fiber distributing, because the restriction of optical cross connect building block technique is difficult to realize the automatic interconnection of large-scale optical fiber.
Summary of the invention
Purpose of the present invention is exactly to solve the problem that exists in the above-mentioned technology, a kind of route when apolegamy of can satisfying is provided, and what do not switch that route is not affected is applicable to cross-coupled allocation plan-large-scale strict non-blockage light-crossing connection matrix structure of large-scale optical fiber and control method thereof.
First purpose of the present invention is to propose a kind of large-scale strict non-blockage light-crossing connection matrix structure.
For achieving the above object, the technical scheme that the present invention takes is: a kind of large-scale strict non-blockage light-crossing connection matrix structure, it is characterized in that: the optical cross-connect matrix structure is three grades of symmetrical CLOS networks, it comprise by r n * m optical switch module I1, I2 ... Ir constitutes input stage; M r * r light open the light module R1, R2 ... Rm constitutes intergrade; R m * n optical switch module O1, O2 ... Or constitutes output stage, connects (see figure 1) for symmetrical chiasma between three grades of optical switch modules.This matrix can realize N * N (the individual optical line of N=n * r) by exchange, and when m 〉=2n-1, matrix has the strictly non-blocking characteristic.
The m road output port that three grades of optical switch module optical cross connects are first n of input stage * m optical switch module I1 respectively with intergrade m r * r optical switch module R1, R2 ... the first via input port of Rm is connected successively; The m road output port of second n of input stage * m optical switch module I2 respectively with intergrade m r * r optical switch module R1, R2 ... the second road input port of Rm is connected successively; The rest may be inferred: the m road output port of r n of input stage * m optical switch module Ir respectively with intergrade m r * r optical switch module R1, R2 ... the r road input port of Rm is connected successively; Intergrade m r * r optical switch module R1, R2 ... the first via output port of Rm is connected successively with the m road input port of first m * n optical switch module O1 of output stage; Intergrade m r * r optical switch module R1, R2 ... the second road output port of Rm is connected successively with the m road input port of second m * n optical switch module O2 of output stage respectively; The rest may be inferred: intergrade m r * r optical switch module R1, R2 ... the r road output port of Rm is connected successively with the m road input port of r the m * n optical switch module Or of output stage respectively.The network configuration basis of this matrix is three grades of symmetrical CLOS networks, this network can realize N * N (the individual optical line of N=n * r) by exchange.The value of adjusting n, r can realize the network of different scales, and the value of adjusting m can adopt the matrix of the identical cross-capacity of different optical switch groups.When m=2n-1, guarantee that promptly this cross-connect matrix strictly non-blocking characteristic has guaranteed the economy of matrix again.
Second purpose of the present invention is the control method that proposes extensive strictly non-blocking optical cross-connect matrix.
To achieve these goals, the technical scheme that the present invention takes is: a kind of control method of extensive strictly non-blocking optical cross-connect matrix is characterized in that: the step that the optical switch module in the optical cross-connect matrix is switched is as follows:
1., (the input stage optical switch module is I1, I2 for each the optical switch module label in the optical cross-connect matrix (hereinafter to be referred as matrix) ... Ir, intergrade optical switch module be R1, R2 ... Rm, output stage optical switch module be O1, O2 ... Or);
2., be that each input port label of matrix is (1,2,3,4,5,6 ...);
3., list a kind of configuration the down the configuration status of each optical switch module in the matrix and network output state as the initial output state of matrix, output state is one group of input port label;
4., list the purpose output state that matrix need transform to;
5., at first the initial output state in matrix purpose output state in the step (4) and the step (3) is compared one by one, if the output state that is compared is identical, then need not switch, if the output state difference that is compared, (j is a subscript then to find out the optical switch module Oj of output port place output stage of purpose output state earlier, j≤r) and the input slogan K1 that in optical switch module Oj, is not connected with other output port, Kh, and then (i is a subscript to find out the optical switch module Ii of input stage at the input port place identical with the purpose output state, i≤r) and the output slogan L1 that in optical switch module Ii, is not connected with other input port, Lh, at K1, Kh and L1, find out equal value X among the Lh again, according to the value X that equates, the input port identical with the purpose output state among the input stage optical switch module Ii is connected to X output port of optical switch module Ii, X the input port of optical switch module Oj is connected to the output port of the output stage optical switch module Oj at purpose output state place, i input port with X optical switch module of intergrade is connected with j output port then, promptly finishes the switching of a purpose output state;
6., after optical switch switches, can not influence the route that not needing of having set up switch, but can influence other route that need switch in the initial output state, therefore need to check the output state of other optical switch module output port of output stage, output state is labeled as 0 if this output port is not connected then with input port, if link to each other with certain input port, then output state is the input slogan;
7., the current output state after will switching continues to compare with the purpose output state as initial output state, promptly repeats 2.～7. step, initial output state and purpose output state after switching are in full accord.
The purpose output state is compared one by one with initial output state,, then need not be switched if identical; If it is different, then operate by above-mentioned steps and can obtain final output state, in handoff procedure, a certain output port can occur does not have the state that any input connects, this does not influence the switching of whole route, only needs it is continued relatively to get final product with the purpose state as new initial condition.The invention has the beneficial effects as follows: 1, the interconnection routing capacity is big, is fit to large-scale optical fiber interconnection routing configuration; 2, have the strictly non-blocking characteristic, satisfy the requirement that the route do not switched when optical network system is matched route does not produce error code, guarantee that disposing few optical switch of trying one's best switches at every turn; 3, efficiency of algorithm height, accurately and reliably when purpose output state and initial output state have N state value not simultaneously, only needs calculating N time.
Description of drawings
Fig. 1 is a large-scale strict non-blockage light-crossing connection matrix structure schematic diagram and as Figure of abstract.
Fig. 2 is illustrated in the initial output state of 6 * 6 optical cross-connect matrixes under a kind of configuration.
Fig. 3 represents through after once switching, the state of matrix output;
Fig. 4 represents through after switching for the second time, the state of matrix output;
Fig. 5 represents through after switching for the third time, the state of matrix output;
Fig. 6 is the control method flow chart of the present invention to extensive strictly non-blocking optical cross-connect matrix.
Embodiment
The invention will be further described below in conjunction with accompanying drawing and example.
By 32 * 3 optical switch module I1, I2, I3 is that input stage, 33 * 3 optical switch module R1, R2, R3 are that intergrade, 33 * 2 optical switch module O1, O2, O3 are 6 * 6 optical cross-connect matrix structures formed of output stage (wherein r is 3, n is 2, m be 3).This matrix structure is three grades of symmetrical CLOS networks, is intersection symmetry connection (see figure 2) between 32 * 3 optical switch modules, 33 * 3 optical switch modules and 33 * 2 optical switch modules.
Three road output ports that three grades of optical switch module optical cross connects are first 2 * 3 optical switch module of input stage I1 are connected successively with the first via input port of intergrade three 3 * 3 optical switch module R1, R2, R3 respectively; Three road output ports of second 2 * 3 optical switch module I2 of input stage are connected successively with the second road input port of intergrade three 3 * 3 optical switch module R1, R2, R3 respectively; The rest may be inferred: three road output ports of the 3rd 2 * 3 optical switch module I3 of input stage are connected successively with the Third Road input port of intergrade three 3 * 3 optical switch module R1, R2, R3 respectively; The first via output port of three 3 * 3 optical switch modules of intergrade is connected successively with three road input ports of first 3 * 2 optical switch module O1 of output stage; The second road output port of intergrade three 3 * 3 optical switch module R1, R2, R3 is connected successively with three road input ports of second 3 * 2 optical switch module O2 of output stage respectively; The rest may be inferred: the Third Road output port of the 3rd 3 * 3 optical switch module R3 of intergrade is connected successively with three road input ports of the 3rd 3 * 2 optical switch module O3 of output stage respectively.
Initial output state among Fig. 2 (1,6,3,2,5,4) is converted into purpose output state shown in Figure 5 (1,3,2,6,5,4), and its optical switch configuration controlled step is as follows:
1., be each the optical switch module label (the input stage optical switch module is I1, I2, I3, and the intergrade optical switch module is R1, R2, R3, and the output stage optical switch module is O1, O2, O3) in the optical cross-connect matrix;
2., be that each input port label of matrix is (1,2,3,4,5,6);
3., list a kind of configuration the down the configuration status of each optical switch module in the matrix and network output state as the initial output state of matrix (1,6,3,2,5,4), as Fig. 2;
4., list the purpose output state (1,3,2,6,5,4) that matrix need transform to;
5., at first compare first output state, first output state of initial output state is 1, and purpose output state first output state also is 1, and these two state consistencies need not switch; As Fig. 2;
Judge second output state, initial second output state of output state is 6, second output state of purpose output state is 3, two state different needs switch, it (is Oj that purpose second output state is positioned at output stage optical switch module O1, j is 1) second output port, the input slogan of the optical switch module O1 that this port can connect is 2,3 (they being that K is 2,3); Second input slogan 3 of purpose output state is positioned at the i.e. (Ii of input stage optical switch module I2, i is 2) first input port, the output slogan of the I2 that this port can connect is 1,2 (is that L is 1,2), the identical value X with L of port numbers K is 2, first input port with I2 is connected to second (X is 2) output port so, second (X is 2) input port of output stage optical switch module O1 is connected to second output port, second (i is 2) input port of intergrade optical switch module R2 (X is 2) is connected to first (j is 1) output port.After switching, first output state of output stage optical switch module O2 becomes 0.
This moment, initial output state became (1,3,0,2,5,4), as Fig. 3;
6., judge the 3rd output state, initial the 3rd output state of output state is 0, the 3rd output state of purpose output state is 2, two output state different needs switch, it (is Oj that the 3rd output state of purpose is positioned at output stage optical switch module O2, j is 2) first output port, the input slogan of the optical switch module O2 that this port can connect is 1,2 (K is 1,2); It (is Ii that the 3rd output state 2 of purpose output state is positioned at input stage optical switch module 11, i is 1) second input port, the output port of the optical switch module I1 that this port can connect is for number being 2,3 (L is 2,3), the identical value X of port numbers K and L is 2, second input port with input stage optical switch module I1 is connected to second (X is 2) output port so, second (X is 2) input port of O2 is connected to first output port, first (i is 1) input port of second of intergrade (X is 2) optical switch module R2 is connected to second (j is 2) output port, after switching, second output of output and optical switch O2 becomes 0
This moment, initial output state became (1,3,2,0,5,4), as Fig. 4;
7., judge the 4th output state, initial the 4th output state of output state is 0, the 4th output state of purpose output state is 6, two output state different needs switch, it (is Oj that purpose the 4th output state 6 is positioned at output stage optical switch module O2, j is 2) second output port, the input slogan of the output stage optical switch module O2 that this port can connect is 1,3 (K is 1,3); It (is Ii that purpose the 4th output state 6 is positioned at input stage optical switch module I3, i is 3) second input port, the output slogan of the I3 that this port can connect is 2,3 (L is 2,3), the identical value X of port numbers K and L is 3, second input port with input stage optical switch module I3 is connected to the 3rd (X is 3) output port so, the 3rd (X is 3) input port of output stage optical switch module O2 is connected to second output port, the 3rd (i is 3) input port of the 3rd of intergrade (X is 3) optical switch module R3 is connected to second (j is 2) output port.
This moment, initial output state became (1,3,2,6,5,4), as Fig. 5, and the purpose output state that this wants just.
Claims (3)
1, a kind of large-scale strict non-blockage light-crossing connection matrix structure is characterized in that: the optical cross-connect matrix structure is three grades of symmetrical CLOS networks, it comprise by r (optical switch module of n * m) (I1, I2 ... Ir) constitute input stage; M (light of r * r) open the light module (R1, R2 ... Rm) constitute intergrade; R (optical switch module of m * n) (O1, O2 ... Or) constitute output stage, connect for symmetrical chiasma between three grades of optical switch modules.
2, large-scale strict non-blockage light-crossing connection matrix structure according to claim 1 is characterized in that: described three grades of optical switch module optical cross connects be input stage first (the m road output port of the optical switch module (I1) of n * m) respectively with intergrade m (optical switch module of r * r) (R1, R2 ... Rm) first via input port is connected successively; Second of input stage (the m road output port of the optical switch module (I2) of n * m) respectively with intergrade m (optical switch module of r * r) (R1, R2 ... Rm) the second road input port is connected successively; The rest may be inferred: input stage r (the m road output port of the optical switch module (Ir) of n * m) respectively with intergrade m (optical switch module of r * r) (R1, R2 ... Rm) r road input port is connected successively; Intergrade m (optical switch module of r * r) (R1, R2 ... Rm) (m * n) the m road input port of optical switch module (O1) is connected first via output port successively with first of output stage respectively; Intergrade m (optical switch module of r * r) (R1, R2 ... Rm) (m * n) the m road input port of optical switch module (O2) is connected the second road output port successively with second of output stage respectively; The rest may be inferred: intergrade m (optical switch module of r * r) (R1, R2 ... Rm) r road output port respectively with the r of output stage (m * n) the m road input port of optical switch module (Or) is connected successively.
3, a kind of control method of extensive strictly non-blocking optical cross-connect matrix is characterized in that: the step that the optical switch module in the optical cross-connect matrix is switched is as follows:
1., be each optical switch module label in the optical cross-connect matrix;
2., be each input port label of matrix;
3., list a kind of configuration the down the configuration status of each optical switch module in the matrix and network output state as the initial output state of matrix, output state is one group of input port label;
4., list the purpose output state that matrix need transform to;
5., at first the initial output state in matrix purpose output state in the step (4) and the step (3) is compared one by one, if the output state that is compared is identical, then need not switch, if the output state difference that is compared, an optical switch module (Oj) of then finding out the output port place output stage of purpose output state earlier reaches the input slogan (K1 that is not connected with other output port in optical switch module (Oj), Kh), and then an optical switch module (Ii) of finding out the input stage at the input port place identical with the purpose output state reaches the output slogan (L1 that is not connected with other input port in optical switch module (Ii), Lh), at (K1, Kh) and (L1, Lh) find out equal value X in again, according to the value X that equates, the input port identical with the purpose output state in the input stage optical switch module (Ii) is connected to optical switch module (Ii) X output port, X input port of optical switch module (Oj) is connected to the output port of the output stage optical switch module (Oj) at purpose output state place, i input port with X optical switch module of intergrade is connected with j output port then, promptly finishes the switching of a purpose output state;
6., check the output state of other optical switch module output port of output stage, if output port is not connected with input port, then output state is labeled as 0; As linking to each other with certain input port, then output state is the input slogan;
7., the current output state after will switching continues to compare with the purpose output state as initial output state, promptly repeats 2.～7. step, initial output state and purpose output state after switching are in full accord.
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| CN108761652A (en) * | 2018-05-30 | 2018-11-06 | 中国科学院半导体研究所 | The multimode optical switching framework with link switching is exchanged for link internal schema |
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