CN1437414A - Cross cascade system based on add and drop multiplexer in optical synchronous digital transmission system - Google Patents
Cross cascade system based on add and drop multiplexer in optical synchronous digital transmission system Download PDFInfo
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- CN1437414A CN1437414A CN 02110863 CN02110863A CN1437414A CN 1437414 A CN1437414 A CN 1437414A CN 02110863 CN02110863 CN 02110863 CN 02110863 A CN02110863 A CN 02110863A CN 1437414 A CN1437414 A CN 1437414A
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Abstract
A cross cascade system based on the division inserting-multiplexing equipment in optical digital transmission hierarchy system includes two sets or above of division inserting-multiplexing equipment whith the branch interface unit of up-down branch route as local service up-down route interface and the cross unit carrying on cross connection for input signal and service will need the selected service being carried on with dispatch between two ends of division inserting-multiplexing to be connected from the cross unit of the first division inserting-multiplexing equipment with the cross unit of the second division inserting-multiplexing equipment through electrical interface or optical interface.
Description
Technical field
The present invention relates to Optical synchronization digital and transmit system (SDH), relate in particular to the cascade system that transmits system dropinsert MUX (ADM) based on Optical synchronization digital.
Background technology
Optical synchronization digital transmits the dropinsert MUX (ADM) in the system (SDH), has input signal and business are carried out cross connect function and branch service interface function up and down.The total capacity of the business that need allocate when a dropinsert MUX (ADM) is during greater than the professional cross-capacity of ADM equipment itself, can utilize the ADM equipment more than two even two to constitute the crossed cascading system with bigger professional cross-capacity by intersecting cascade together.General implementation method can describe with reference to accompanying drawing 1, utilize on first ADM equipment 100 its up and down tributary interface unit 110 business that needs is formulated to second ADM equipment 200 be sent on the unit of tributary interface up and down 210 of second ADM equipment correspondence, the business that needs simultaneously to be formulated to first ADM equipment 100 on second ADM equipment 200 is also utilized up and down, and tributary interface unit 210 is sent on first ADM equipment 100 corresponding tributary interface unit 110 up and down, the cross unit of such two ADM equipment has constituted a crossed cascading system by the business by tributary interface unit transmission up and down, has bigger professional cross-capacity.The business that described two ADM equipment need be allocated between the two by tributary interface unit is up and down delivered to the other side, give cross matrix in the cross unit by bus with described service delivery again, allotment is delivered on the unit of tributary interface up and down of described professional correspondence by bus afterwards again through cross matrix, thereby has constituted the intersection cascade of two ADM equipment.The total professional cross-capacity of cross unit of supposing described every ADM equipment is N * N (N＞1, the quantity of expression administrative unit AU4 or equivalent virtual container VC4), wherein R (N＞R＞1, the quantity of expression administrative unit AU4 or equivalent virtual container VC4) business is used to transmit the cross business of ADM equipment room.By the intersection cascade of two ADM equipment, for these two ADM equipment, see over from the outside, can think that it is an ADM equipment, but total volume of business is 2 * (N-R).The crossed cascading system of the ADM equipment more than two constitutes with reference to above-mentioned principle.
There is following technical problem in this crossed cascading system: the total capacity of branch service up and down of ADM device systems is certain on the one hand, utilize when the tributary interface unit carries out the transmission of ADM equipment room cross business up and down, on every ADM equipment, all can take the interface resource of tributary interface unit up and down, understand total ability of branch service up and down of sacrificial system like this; On the other hand; cascade system does not have direct defencive function for the cross business of ADM equipment room; can only utilize the extra unit of tributary interface up and down transmission protection professional; on cross unit, carry out concurrent excellent receipts then; to take the interface resource of the unit of tributary interface up and down of twice like this, sacrifice the ability of branch service up and down of system.When the traffic carrying capacity of needs allotments is very big, and professional intersection during more complicated, may need more ADM equipment to finish configuration.Suppose; the ability of branch service up and down of every ADM equipment is 64 equivalent virtual container VC4; and need finish the professional up and down of 96 equivalent virtual container VC4; forming in the crossed cascading system by two ADM equipment; can can be shared the business of 48 equivalent virtual container VC4 this moment by every ADM equipment; then remaining 16 equivalent virtual container VC4 volumes of business can be used for the intersection cascade of ADM equipment room; if consider protection, be equivalent to have only this moment 8 equivalent virtual container VC4 business to be used to intersect cascade.In the time of the business configuration more complicated, this capacity that intersects cascade may be not enough, just need utilize this moment three or more ADM equipment finish configuration, increased equipment cost.
Summary of the invention
Technical problem to be solved by this invention is that existing ADM crossed cascading system based on Optical synchronization digital transmission system takies the resource of tributary interface unit up and down; Further, technical problem to be solved by this invention is that the existing ADM crossed cascading system that transmits system based on Optical synchronization digital takies the resource of tributary interface unit up and down when the defencive function of the cross business that realizes the ADM equipment room.
Technical scheme
The technical scheme that realizes technical problem to be solved by this invention and take is summarized as follows:
The invention provides a kind of crossed cascading system that transmits the system dropinsert MUX based on Optical synchronization digital, comprise the dropinsert MUX more than two or two, described dropinsert MUX comprise as local service up and down the road interface the unit of tributary interface up and down and input signal and business carried out cross-coupled cross unit, it is characterized in that the business that need allocate is connected with the cross unit of second dropinsert MUX by electrical interface or optical interface by the cross unit of first dropinsert MUX between selected two ends dropinsert MUX.
Further, the crossed cascading system that transmits the system dropinsert MUX based on Optical synchronization digital provided by the invention, the cross unit of described each dropinsert MUX comprises two cross matrixes, parallel simultaneously two cross matrixes that are sent to relative described second dropinsert MUX of business that described first dropinsert MUX need be allocated between selected two ends dropinsert MUX by described two cross matrixes, simultaneously to receiving simultaneously, and select the excellent business of signal quality by the parallel business that need between selected two ends dropinsert MUX, allocate that sends over of two cross matrixes of described second dropinsert MUX.
Adopt technical solution of the present invention, the crossed cascading system that is provided in the formation of the SDH dropinsert MUX (ADM) more than two or two, can when carrying out the cascade of the professional intersection of ADM equipment room, not influence total ability of branch service up and down of every ADM equipment, do not take the ADM equipment resource of tributary interface unit up and down; Further, up and down can provide complete protection mechanism more to the business of the intersection cascade of equipment room in the resource of tributary interface unit not taking ADM equipment; Under the situation of and configuration more complicated big, can utilize the ADM equipment of lesser amt to realize crossed cascading system in some traffic carrying capacity; Can utilize simultaneously the capacity of the professional cross matrix capacity of expansion ADM equipment, make system have outstanding scalability etc. with the expansion cascading system.
Description of drawings
Fig. 1 shows the structured flowchart of the crossed cascading system that prior art is made of two ADM equipment;
Fig. 2 shows the structured flowchart of first embodiment of the crossed cascading system that the present invention is made of two ADM equipment;
Fig. 3 shows the structured flowchart of second embodiment of the crossed cascading system that the present invention is made of two ADM equipment;
Fig. 4 shows the structured flowchart of first embodiment of the crossed cascading system that the present invention is made of three ADM equipment;
Fig. 5 shows the structured flowchart of second embodiment of the crossed cascading system that the present invention is made of three ADM equipment;
Embodiment
Below in conjunction with accompanying drawing, the execution mode that the present invention is concrete is described.
Fig. 2 shows the structured flowchart of first embodiment of the crossed cascading system that the present invention is made of two ADM equipment.As shown in Figure 2, the business that crossed cascading system need be allocated at selected ends A DM equipment room is connected with the cross unit 220 of second ADM equipment 200 by electrical interface or optical interface by the cross unit 120 of first ADM equipment 100, the crossed cascading system of Gou Chenging does not need to take the resource of the unit of tributary interface up and down of ADM equipment like this, can not influence total volume of business up and down of system.Further; the cross unit of each dropinsert MUX comprises two cross matrixes; two cross matrixes 121 that first ADM equipment 100 comprises by cross unit 120 and 122; need be at parallel simultaneously 220 two cross matrixes 221 of cross unit and 222 that are sent to second relative ADM equipment 200 of ends A DM equipment 100 and 200 business of allocating; simultaneously to two cross matrixes 221 and 222 parallel need receiving simultaneously of sending in the business that ends A DM equipment room is allocated by second ADM equipment 200; and select that excellent road business of signal quality to carry out cascade and handle; need two paths just have been arranged at ends A DM equipment 100 and 200 business of allocating like this; thereby can realize the defencive function of the business between dropinsert MUX by concurrent excellent receipts, realize 1+1 protection.
Fig. 3 shows the structured flowchart of second embodiment of the crossed cascading system that the present invention is made of two ADM equipment.As Fig. 3, the crossed cascading system that shown crossed cascading system shows than Fig. 2 has complete protection function more, in cascade system, first ADM equipment 100 need be sent to relative 200 two cross matrixes 221 of second ADM equipment and 222 in that ends A DM equipment 100 and 200 business of allocating are parallel simultaneously by cross matrix 121, and wherein cross matrix 122 also need be sent to relative 200 two cross matrixes 221 of second ADM equipment and 222 in that ends A DM equipment 100 and 200 business of allocating are parallel simultaneously on the other hand; Simultaneously, 121 pairs of the cross matrixes of first ADM equipment 100 are by two cross matrixes 221 and 222 parallel need the receiving simultaneously in the business that ends A DM equipment room is allocated of sending over of second ADM equipment 200, and 122 pairs of the cross matrixes of first ADM equipment 100 are by two cross matrixes 221 and 222 parallel need the receiving simultaneously in the business that ends A DM equipment room is allocated of sending over of second ADM equipment 200 on the other hand.Like this, in the cascade system that two ADM equipment constitute, need have four interface channels, realize more perfect protection mechanism by concurrent excellent receipts in the business that ends A DM equipment room is allocated.Under such protection mechanism; even any one cross matrix inefficacy is arranged in every ADM equipment in the cascade system or in four interface channels, has any three inefficacies can not influence the operate as normal of equipment; as long as every ADM equipment of synchronization has a cross matrix operate as normal; and the connection between these two cross matrixes is normal; so just can guarantee professional normal operation; powerful like this protective capability has greatly strengthened the reliability of system, can carry out the maintenance and the troubleshooting of faults of equipment simultaneously very easily.
Below in conjunction with accompanying drawing 2 and accompanying drawing 3, the volume of business of cascade system is described.Total professional cross-capacity of supposing every ADM equipment is N * N (N＞1, the quantity of expression administrative unit AU4 or equivalent virtual container VC4), and the capacity of each cross matrix of cross unit is M * M (M＞N, the quantity of expression administrative unit AU4 or equivalent virtual container VC4), this moment is with remaining cross-capacity R (0＜R≤M-N, the quantity of expression administrative unit AU4 or equivalent virtual container VC4) cross business that is used to transmit the ADM equipment room, the cross matrix of cascade system can constitute the professional any intersection of N+R (quantity of expression administrative unit AU4 or equivalent virtual container VC4) like this.By intersecting cascade, for the crossed cascading system that these two ADM equipment constitute, see over from the outside, can think that it is an ADM equipment, but total professional cross-capacity is original twice, promptly be 2 * N * N (N＞1, the quantity of expression administrative unit AU4 or equivalent virtual container VC4).Such cascade system has good autgmentability simultaneously, for an ADM equipment, after the system design moulding, system's total capacity of branch service up and down determines, but the size of the cross matrix of cross unit but is can be by such as building a square matrix, the methods such as chip of CLOS matrix and the bigger cross-capacity of use improve, utilize the cross-capacity of expansion that the volume of business of bigger ADM equipment room is provided, improve the cross-capacity of cascade system, so for the extensibility of system, tangible advantage is arranged undoubtedly based on the crossed cascading system of cross matrix.
When the total capacity of the business that need allocate when dropinsert MUX (ADM) needs bigger cross-capacity, can utilize three ends or more ADM equipment to constitute crossed cascading system, describe in detail below in conjunction with accompanying drawing 4 and accompanying drawing 5.
Accompanying drawing 4 shows the structured flowchart of first embodiment of the intersection cascade loop system that the present invention is made of three ADM equipment, as shown in Figure 4, join end to end by optical interface or electrical interface by described cross unit between three ADM equipment, constitute the closed loop of intersection cascade.The intersection cascade loop system of three above ADM equipment formations is analogized in this way.Take up an official post two cascade connection and the cascade system shown in accompanying drawing 2 and the accompanying drawing 3 of the ADM equipment that is connected of its intermediate ring road is just the same.In accompanying drawing 4, cascade system is like this work, and the cross matrix 120 of ADM equipment 100 sends self to ADM equipment 200 to the business via ADM equipment 100 to ADM equipment 200 that the business and the ADM equipment 300 of ADM equipment 200 and ADM equipment 300 sends; The cross matrix 220 of ADM equipment 200 takes down the business of ADM equipment 100 to ADM equipment 200 and ADM equipment 300 to ADM equipment 200, simultaneously ADM equipment 100 is sent to the business of ADM equipment 300 and business that ADM equipment 200 is sent to ADM equipment 100, ADM equipment 300 and is sent to ADM equipment 300; The cross matrix 320 of ADM equipment 300 will take down from the business of ADM equipment 100, ADM equipment 200, and the business that will arrive ADM equipment 100, ADM equipment 200 simultaneously is sent to ADM equipment 100, has constituted an intersection cascade loop system like this.Can constitute the cascade of more ADM equipment by this loop that intersects cascade, reach bigger cross-capacity.Arrow is wherein represented service route.Further; the protection mechanism of the crossed cascading system of accompanying drawing 2 or accompanying drawing 3 statements can be applied in the described intersection cascade loop system fully; the structured flowchart of second embodiment of the accompanying drawing 5 intersection cascade loop system that to be the present invention be made of three ADM equipment; cascade system among the figure constitutes two independent cascade loop; its intermediate ring road S and loop P protect passage each other; formation 1+1 protection mechanism; just the same with the protection philosophy of accompanying drawing 2; if the loop of crossed cascading system breaks down a certain section connection; the cascade business of then intersecting can be transmitted by the protection loop, has very strong defencive function.Further, the protection mechanism of the crossed cascading system of accompanying drawing 3 statement is applied to intersect (not shown in the accompanying drawing) in the cascade loop system, the loop quantity of the cascade system of formation can be more, and defencive function can be more powerful.
Although the disclosed crossed cascading system that relates to based on Optical synchronization digital transmission system dropinsert MUX has been carried out special description with reference to embodiment, those skilled in the art can understand, under the situation that does not depart from scope and spirit of the present invention, can carry out all conspicuous modification of form and details to it.Therefore, that advised more than but the modification do not limited to all within the scope of the present invention.Protection scope of the present invention is determined by claims.
Claims (7)
1, transmits the crossed cascading system of system dropinsert MUX based on Optical synchronization digital, comprise the dropinsert MUX more than two or two, described dropinsert MUX comprise as local service up and down the road interface the unit of tributary interface up and down and input signal and business carried out cross-coupled cross unit, it is characterized in that the business that need allocate is connected with the cross unit of second dropinsert MUX by electrical interface or optical interface by the cross unit of first dropinsert MUX between selected two ends dropinsert MUX.
2, the crossed cascading system that transmits the system dropinsert MUX based on Optical synchronization digital according to claim 1, it is characterized in that, the cross unit of described each dropinsert MUX comprises two cross matrixes, parallel simultaneously two cross matrixes that are sent to relative described second dropinsert MUX of business that described first dropinsert MUX need be allocated between selected two ends dropinsert MUX by described two cross matrixes, simultaneously to receiving simultaneously, and select the excellent business of signal quality by the parallel business that need between selected two ends dropinsert MUX, allocate that sends over of two cross matrixes of described second dropinsert MUX.
3, the crossed cascading system that transmits the system dropinsert MUX based on Optical synchronization digital according to claim 2, it is characterized in that, providing four interface channels to be used for the business that need allocate between selected two ends dropinsert MUX is transmitted between the selected two ends dropinsert MUX.
4, according to claim 1, the 2 or 3 described crossed cascading systems that transmit the system dropinsert MUX based on Optical synchronization digital, it is characterized in that, comprise the dropinsert MUX more than three or three, join end to end by optical interface or electrical interface by described cross unit between the ADM equipment, constitute the closed loop of intersection cascade.
5, the crossed cascading system that transmits the system dropinsert MUX based on Optical synchronization digital according to claim 4, it is characterized in that, the cross matrix of each dropinsert MUX receives the business that needs our station to handle on the loop, and the needs that will receive are sent to the next dropinsert MUX transmission of business on loop of other dropinsert MUXs.
6, the crossed cascading system based on Optical synchronization digital transmission system dropinsert MUX according to claim 4 is characterized in that described loop has one or more.
7, according to claim 1,2 or 3 described crossed cascading systems, it is characterized in that the cross matrix of described cross unit is square matrix or CLOS matrix based on Optical synchronization digital transmission system dropinsert MUX.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021108633A CN100455034C (en) | 2002-02-09 | 2002-02-09 | Cross cascade system based on add and drop multiplexer in optical synchronous digital transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021108633A CN100455034C (en) | 2002-02-09 | 2002-02-09 | Cross cascade system based on add and drop multiplexer in optical synchronous digital transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1437414A true CN1437414A (en) | 2003-08-20 |
| CN100455034C CN100455034C (en) | 2009-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021108633A Expired - Fee Related CN100455034C (en) | 2002-02-09 | 2002-02-09 | Cross cascade system based on add and drop multiplexer in optical synchronous digital transmission system |
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| Country | Link |
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| CN (1) | CN100455034C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100403723C (en) * | 2004-05-09 | 2008-07-16 | 华为技术有限公司 | Method for increasing using effect of data storage in full-T cross |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI95981C (en) * | 1992-04-23 | 1996-04-10 | Nokia Telecommunications Oy | Synchronization of SDH signals |
| CN1076914C (en) * | 1997-05-17 | 2001-12-26 | 华为技术有限公司 | Plug-in sharer for optical digital transmission equipment |
| KR100318904B1 (en) * | 2000-01-10 | 2001-12-29 | 윤종용 | Add/drop cross connection apparatus for sdh |
| GB0031839D0 (en) * | 2000-12-29 | 2001-02-14 | Marconi Comm Ltd | A multi-service digital cross-connect |
-
2002
- 2002-02-09 CN CNB021108633A patent/CN100455034C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100403723C (en) * | 2004-05-09 | 2008-07-16 | 华为技术有限公司 | Method for increasing using effect of data storage in full-T cross |
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| CN100455034C (en) | 2009-01-21 |
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Owner name: SHENZHENG CITY ZTE CO., LTD. Free format text: FORMER OWNER: SHENZHENG CITY ZTE CO., LTD. SHANGHAI SECOND INSTITUTE Effective date: 20030724 |
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Effective date of registration: 20030724 Applicant after: Zhongxing Communication Co., Ltd., Shenzhen City Applicant before: Shanghai Inst. of No.2, Zhongxing Communication Co., Ltd., Shenzhen City |
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