CN1318910A - Multistage interconnected optical exchange matrix structure without blocking absolutely and its control method - Google Patents
Multistage interconnected optical exchange matrix structure without blocking absolutely and its control method Download PDFInfo
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- CN1318910A CN1318910A CN01115565A CN01115565A CN1318910A CN 1318910 A CN1318910 A CN 1318910A CN 01115565 A CN01115565 A CN 01115565A CN 01115565 A CN01115565 A CN 01115565A CN 1318910 A CN1318910 A CN 1318910A
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Abstract
The present invention relates to channel configuration in optical communication network and is suitable for channel configuration of optical node. The main feature of the present invention is that 2x2 optical switches are connected via optical fiber to constitute m x m optical information exchange matrix and its control method is to find out different output ports by comparing the initial output state of the matrix and required output state and to determine to optical switches to be regulated and perform state conversion to obtain required output state through checking previous state array. Compared with traditional table look-up method, the present invention has simplified routing and alogirhm, high efficiency and the features of being simple, accurete and fast.
Description
The present invention relates to the allocation plan and the control method thereof of multiport optical switch in optical communication and the optical-fiber network transmission channel, be applicable to channel apolegamy in the optical node.
When optical-fiber network required the channel apolegamy, the channel that does not switch will not produce error code as far as possible, and promptly each configuration few optical switch that will guarantee to try one's best switches.Traditional way is with the method for tabling look-up and finding the solution, leave the tabulation of the allocation plan of optical switch in the program storage portions with the form of array, after webmaster is assigned configuration, monoboard programme is looked into this table, to obtain the controlling schemes of optical switch, according to the current state of optical switch, from several schemes, choose the best alternatives and control the optical switch action again.Need list each state because of tabling look-up and by the change situation of a state variation, so this look-up table is very loaded down with trivial details to other all states.
Purpose of the present invention is exactly to solve the problem that exists in the above-mentioned prior art, provide a kind of when satisfying optical-fiber network channel being matched, the channel that does not switch does not produce the configuration variation scheme-multistage interconnected absolute clog-free optical switching matrix structure and the control method thereof of each simple and feasible optical switch that error code requires as far as possible.
First purpose of the present invention can realize in the following manner.
Form matrix by optical fiber and optical switch, the structure of this matrix is: with being parallel connection between adjacent two optical switches of delegation, be interconnection between two optical switches of diagonal position each other in adjacent two row, the quantity of the set switch of each row is identical, and the optical switch position of adjacent two row is corresponding one by one.
Described optical switch is 2 * 2 types; Described is parallel connection with adjacent two optical switches of delegation, wherein being the 1st input port of the 1st delivery outlet connection back one optical switch of last optical switch between the adjacent light switch of odd-numbered line, is the 2nd input port of the 2nd delivery outlet connection back one optical switch of last optical switch between the adjacent light switch of even number line; Be interconnection between two optical switches of diagonal position each other in described adjacent two row, wherein the 2nd delivery outlet of the last optical switch of odd-numbered line connects the 1st input port with the even number line optical switch at its diagonal angle, and the 1st delivery outlet of the last optical switch of even number line connects the 2nd input port with the odd-numbered line optical switch at its diagonal angle.
Second purpose of the present invention can realize in the following manner.
The step of controlling relevant optical switch conversion in the multistage interconnected absolute clog-free optical switching matrix structure of the present invention is as follows:
(1) is each input port label of optical switching matrix (hereinafter to be referred as matrix);
(2) list under a kind of configuration the output state of each optical switch in the matrix, obtain the state array of historic state, the initial output state of matrix;
(3) list the output state of the matrix that need transform to;
(4) output state of the needs that the initial output state of matrix in the step (2) and step (3) is listed compares one by one, finds out the port of both different output states, clearly the output state that should change;
(5) check the state array of the historic state that obtains in the step (2), determine to need to take place the optical switch of state transformation;
(6) state of determined optical switch in the shift step (5) obtains the output state that the corresponding output end mouth transforms to.
Compare with initial output state when the output state that needs transform to, when having only the output state of 1 output port to change, the output state that can finally be needed for 1 time by foregoing shift step operation; When the output state that needs transform to is compared with initial output state, when having the output state of 2 or 2 above output ports to need conversion, only change the wherein output state of 1 pair of port by foregoing shift step at every turn, with the matrix output state that obtains thus initial output state as the back linear transformation, and the output state of each optical switch in the matrix under the preceding configuring condition, then as the state array of historic state of back linear transformation, repeat (4)-(6) of above-mentioned steps again, carry out the conversion of output state next time; By that analogy, change the output state that is finally needed one by one.
Major advantage of the present invention is: 1, satisfy the requirement that the channel that do not switch when optical network system is matched channel does not produce error code as far as possible, guaranteed to have in each configuration few optical switch of trying one's best to switch, and do not influenced the optical channel that need not change; 2, simplified routing algorithm, improve efficiency of algorithm, configuration variation scheme to each optical switch is simple and feasible, the configuration order of assigning according to webmaster, select preferred plan rapidly, control certain several optical switches action, just can realize the apolegamy of channel in the optical node, give prominence to embodied succinctly, efficiently, characteristics fast.
The invention will be further described below in conjunction with drawings and Examples.
Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 be respectively different output states by 82 * 24 * 4 optical switch matrix structural representations of building.Wherein:
Fig. 1 is illustrated under a kind of configuration, the initial output state of above-mentioned 4 * 4 switch matrix;
Fig. 2 represents only through 1 conversion, 1 optical switch of adjusting action, the required final output state of this matrix that just obtains;
Fig. 5 represents through 3 conversion, regulates 3 optical switches of action, the required final output state that just obtains;
Fig. 3, Fig. 4 represent that respectively the initial output state by Fig. 1 is converted into the final output state of Fig. 5, the output state of 2 intermediate conversions of process;
Fig. 6 is the flow chart of the present invention to multistage interconnected absolute clog-free optical switching matrix structure control method.
The optical switch that adopts among the embodiment is 2 * 2 types, is connected by optical fiber by 82 * 2 optical switches to be built into clog-free 4 * 4 optical switch matrixes.
Embodiment 1:
Desire is converted into the output state of needs shown in Figure 2 with the output state of optical switch matrix shown in Figure 1, and the step that its control changes the optical switch configuration is as follows:
(1) be 1,2,3 at first for each input port label, 4.
(2) be listed in a kind of output state that disposes down each optical switch according to this label successively.As:
1,2 1,3 1,4 1,2
3,4 4,2 2,3 3,4
Then the output state of 4 * 4 optical switches is 1,2,3,4, as shown in Figure 1.
(3) listing the output state that need change to, for example is 1,2,4,3.Then compare one by one with initial output state and the present output state that needs, first output state of finding them is identical, so just compare and find that it still is identical with second output state and second output state that finally needs, continue then to compare with the 3rd output state, the output state of finding original output port is 3, and finally need the 4th output port of state is 3, therefore change with regard to three or four ports with current state, promptly 3,4 change, and the state array through looking into original state can get, and what need adjusting is the state of the 8th optical switch (GK8), in fact exactly the 8th optical switch GK8 become parallel state by original intersection attitude, then finally export the result and will become 1,2,4,3, as shown in Figure 2.
Embodiment 2:
Desire is converted into the final output state (4,3,1,2) of needs shown in Figure 5 with the output state (1,2,3,4) of optical switch matrix shown in Figure 1, and step that its control changes optical switch configuration is as follows:
(1) at first contrasts first output state, first output state originally is 1,1 present state has changed to the 3rd output port, then at first change with the state of the first and the 3rd output port of original state, the result is 3,2,1,4, can obtain through the state array of looking into original state for the optical switch that achieves this end the needs action is second optical switch GK2.As shown in Figure 3, Ci Shi state array is:
1,2 3,1 3,4 3,2
3,4 4,2 2,1 1,4
(2) present state 3,2,1,4 continue to compare with the state that need obtain, and find that the output state of first output port this moment should arrive second output port, so change with regard to first and second ports with present output state, promptly 3,2 change 3,2 optical switches of changing correspondence are the 4th GK4, and obtain being output as 2,3 this moment, 1,4, as shown in Figure 4, the state array of this moment is:
1,2 3,1 3,4 2,3
3,4 4,2 2,1 1,4
(3) continue with present output state 2,3,1,4 and the final output state 4 that needs, 3,1,2 compare, and the state of finding present first output port of output state is 2, and therefore state 2 allows the output state of these two output ports change at the 4th output port in final output state, promptly 2,4 change, and through looking into the state array of present output state, the optical switch that discovery should be moved is the 6th GK6, output state after the action is 4,3,1,2, as shown in Figure 5, the state array is:
1,2 3,1 3,2 4,3
3,4 2,4 4,1 1,2
(4) continue to compare with output state that obtains at present and the output state that obtains that finally needs, first state with final output state is identical to find first state of present output state, just the output state with second output port of second output state of current state and end-state compares, also be identical, proceed then, find that present output state is in full accord with the output state that needs obtain.In whole process, the optical switch that needs variable condition is GK2, GK4, GK6.The output state array that finally obtains is:
1,2 3,1 3,2 4,3
3,4 2,4 4,1 1,2
This required just output state that transforms to.
Claims (4)
1, a kind of multistage interconnected absolute clog-free optical switching matrix structure, it is characterized in that: form matrix by optical fiber and optical switch, the structure of this matrix is: with being parallel connection between adjacent two optical switches of delegation, be interconnection between two optical switches of diagonal position each other in adjacent two row, the quantity of the set switch of each row is identical.
2, multistage interconnected absolute clog-free optical switching matrix structure according to claim 1, it is characterized in that: described optical switch is 2 * 2 types; Described is parallel connection with adjacent two optical switches of delegation, wherein being the 1st input port of the 1st delivery outlet connection back one optical switch of last optical switch between the adjacent light switch of odd-numbered line, is the 2nd input port of the 2nd delivery outlet connection back one optical switch of last optical switch between the adjacent light switch of even number line; Be interconnection between two optical switches of diagonal position each other in described adjacent two row, wherein the 2nd delivery outlet of the last optical switch of odd-numbered line connects the 1st input port with the even number line optical switch at its diagonal angle, and the 1st delivery outlet of the last optical switch of even number line connects the 2nd input port with the odd-numbered line optical switch at its diagonal angle.
3, a kind of control method of multistage interconnected absolute clog-free optical switching matrix structure is characterized in that: the step of controlling relevant optical switch conversion in this optical switching matrix is as follows:
(1) is each input port label of optical switching matrix (hereinafter to be referred as matrix);
(2) list under a kind of configuration the output state of each optical switch in the matrix, obtain the state array of historic state, the initial output state of matrix;
(3) list the output state of the matrix that need transform to;
(4) the initial output state of matrix in the step (2) and the output state of the listed needs of step (3) are compared one by one, find out the label of both different output states, clearly the output state that should change;
(5) check the state array of the historic state that obtains in the step (2), determine to need to take place the optical switch of state transformation;
(6) state of determined optical switch in the shift step (5) obtains the output state that the corresponding output end mouth transforms to.
4, the control method to multistage interconnected absolute clog-free optical switching matrix structure according to claim 3, it is characterized in that: when the output state that needs transform to is compared with initial output state, when having only the output state of 1 output port to change, the output state that can finally be needed for 1 time by the described shift step operation of claim 1; When the output state that needs transform to is compared with initial output state, when having the output state of 2 or 2 above output ports to need conversion, only change the wherein output state of 1 pair of port by the described shift step of claim 1 at every turn, with the matrix output state that obtains thus initial output state as the back linear transformation, and the output state of each optical switch in the matrix under the preceding configuring condition, then as the state array of historic state of back linear transformation, repeat (4)-(6) of the described step of claim 1 again, carry out the conversion of output state next time; By that analogy, change the output state that is finally needed one by one.
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| CN01115565A CN1318910A (en) | 2001-04-29 | 2001-04-29 | Multistage interconnected optical exchange matrix structure without blocking absolutely and its control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102193151A (en) * | 2010-03-08 | 2011-09-21 | 三菱电机株式会社 | Optical switch and optical-switch control method |
| CN103973369A (en) * | 2014-05-16 | 2014-08-06 | 电子科技大学 | State configuration method for optical switch matrix |
| US9749720B2 (en) | 2013-05-13 | 2017-08-29 | Huawei Technologies Co., Ltd. | Receiving device and optical switching fabric apparatus |
-
2001
- 2001-04-29 CN CN01115565A patent/CN1318910A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102193151A (en) * | 2010-03-08 | 2011-09-21 | 三菱电机株式会社 | Optical switch and optical-switch control method |
| US8478089B2 (en) | 2010-03-08 | 2013-07-02 | Mitsubishi Electric Corporation | Optical switch and optical-switch control method |
| CN102193151B (en) * | 2010-03-08 | 2014-03-12 | 三菱电机株式会社 | Optical switch and optical-switch control method |
| US9749720B2 (en) | 2013-05-13 | 2017-08-29 | Huawei Technologies Co., Ltd. | Receiving device and optical switching fabric apparatus |
| CN103973369A (en) * | 2014-05-16 | 2014-08-06 | 电子科技大学 | State configuration method for optical switch matrix |
| CN103973369B (en) * | 2014-05-16 | 2016-03-23 | 电子科技大学 | A kind of state collocation method of optical switch matrix |
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