CN1545367A - Method for realizing large capacity synchronous optical network and SDH cross unit - Google Patents
Method for realizing large capacity synchronous optical network and SDH cross unit Download PDFInfo
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- CN1545367A CN1545367A CNA200310115328XA CN200310115328A CN1545367A CN 1545367 A CN1545367 A CN 1545367A CN A200310115328X A CNA200310115328X A CN A200310115328XA CN 200310115328 A CN200310115328 A CN 200310115328A CN 1545367 A CN1545367 A CN 1545367A
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Abstract
The invention relates to a method to implement large-capacity synchronous optical network and synchronous digital series cross units, including the following steps: firstly classifying the configurations received from a network manager into unicast (1 : 1) service configuration request and double-cast (1 : 2) service configuration request; then using a configuration path obtaining method of double-cast (1 : 2) service to complete the double-cast (1 : 2) service configuration request; then using a configuration path obtaining method of unicast (1 : 1) service to complete the rest unicast (1 : 1) service configuration requests; and finally reporting the completing states of configurations to the network manager.
Description
Technical field
The present invention relates to realize the method for big capacity Synchronous Optical Network and synchronous digital hierarchy cross unit.Exactly, the present invention relates to a kind of implementation method and application that divides big capacity Synchronous Optical Network/synchronous digital hierarchy (SONET/SDH) cross unit of time-division (T-S-T) structure based on the time-division sky.
Background technology
Because powerful error monitoring, protection and the management function of Synchronous Optical Network/synchronous digital hierarchy (SONET/SDH) network becomes a kind of visual plant of the communications field, the world today aspect the wide area network transmission technology.Present most of long-distance service all is to transmit on the speed of 2.5Gbit/s and 10Gbit/s by SONET/SDH.And the system of SONET/SDH40Gbit/s also will be applied in the near future.And along with the growth of data volume, the business in the metropolitan area network has also proposed the requirement of same speed now.Present also existing device can be realized fusion and the interconnection and interflow of GE and SONET/SDH.This just requires add drop multiplex (ADM) equipment that the ability that can handle from DS3 (45Mb/s) to the 10Gb/s business is arranged.So the smallest particles that intersects also requires to be STS-1 (SONET) or STM-1 (SDH).And the bandwidth requirement of metropolitan area network also is to 64 2.5Gb/s (total bandwidth 160Gb/s) even more from 16 2.5Gb/s (total bandwidth 40Gb/s).
Based on the characteristics and the requirement of wide area network and metropolitan area network, for SONET/SDH equipment, the cross unit of the little intersection particle of a kind of big capacity is absolutely necessary.
Summary of the invention
The object of the invention provides the method that realizes big capacity Synchronous Optical Network and synchronous digital hierarchy cross unit, and this method relates to high-speed serial I/O, and chi structure and design are considered.It can support the unicast service of strictly non-blocking, also can be supported in and realize concurrent choke free two business of broadcasting in the sky sub matrix.Realize the basic demand of unidirectional path protection ring (UPSR)/two-direction duplexing section guard ring (BLSR) that two multicast functions are SONET/SDH, it can be supported multi-direction OC48 or OC192 light branch road and can realize multiplex section and path protection.
The method of big capacity Synchronous Optical Network of realization provided by the invention and synchronous digital hierarchy cross unit is characterized in that this method comprises the following steps:
At first will classify, promptly be divided into clean culture (1: 1) business configuration request and two (1: 2) configuring request two classes of broadcasting from the configuration that webmaster receives; Specifically comprise: all business configuration requests of mark are 0; Get a business configuration request then, this request comprises ingress port, inlet time slot, outlet port, outlet time slot, if in other surplus lines configuring request, can find another business configuration request, this request comprises ingress port, inlet time slot, outlet port, outlet time slot, wherein, ingress port is identical with last business configuration request with the inlet time slot, i.e. two business configuration requests are two identical business configuration requests of inlet, then put it into two formations of broadcasting, become one group pair and broadcast configuring request, simultaneously these two configuring request are labeled as 1; Otherwise put it into unicast queue, simultaneously this configuring request is labeled as 1; So repeat to and finish all configuring request;
Then finish two (1: 2) business configuration requests of broadcasting with two (1: 2) professional configuration path acquisition methods of broadcasting; Specifically comprise: when receiving a configuring request, this request comprises ingress port, inlet time slot, outlet port, outlet time slot, gets its corresponding concurrent configuring request simultaneously; Begin to check that if ingress port in this sheet and outlet port one, 2 are the not time spent, this sky burst can be used as this cross-over configuration from first sky burst; So ingress port in this sky burst and outlet port one, 2 all are labeled as and use, and with ingress port and outlet port one be communicated with, so ingress port or the outlet port one or 2 in the sheet is marked as the time spent, just abandon this sheet, ingress port and outlet port 2 are communicated with, but the pairing time slot of this spatial pieces may be inconsistent with the inlet time slot of inlet time-division, so need when inlet, to do time gas exchange in the sub matrix, in like manner when outlet, do time gas exchange in the sub matrix, if getting another sky burst checks the corresponding port, until finding available empty burst; If institute is free burst all not meet the demands, promptly block, should turn to fault processing, fault processing is used for realizing mistake to webmaster report configuring request;
Use the professional configuration path acquisition method of clean culture (1: 1) to finish remaining clean culture (1: 1) business configuration request then; Specifically comprise: in empty sub matrix, there are how many time slots how many corresponding empty bursts are just arranged in the sub matrix when corresponding, ingress port and outlet port at first all are labeled as and do not use in each empty burst, when receiving a configuring request, this request comprises ingress port, inlet time slot, outlet port, outlet time slot, begin to check that if ingress port in this sheet and outlet port are the not time spent, this sky burst can be used as this cross-over configuration from first sky burst; So ingress port in this sky burst and outlet port all are labeled as and use, and with ingress port and the connection of outlet port, but the pairing time slot of this spatial pieces may be inconsistent with the inlet time slot of inlet time-division, so need when inlet, to do time gas exchange in the sub matrix, in like manner when outlet, do time gas exchange in the sub matrix,, just abandon this sheet if ingress port in this sheet or outlet port are marked as the time spent, get another sky burst and check the corresponding port, until finding available empty burst; If institute is free burst all not meet the demands, promptly block, should turn to fault processing, fault processing is used for realizing mistake to webmaster report configuring request;
To dispose completion status at last and report webmaster; Specifically comprise: the information that produces from the fault processing in second step and the 3rd step all is used for when webmaster reports configuration to realize mistake having taken place, remind the operator from new inspection configuration data to eliminate mistake, generation proper configuration data.
The invention provides a kind of flexibly and the realization and the application of the powerful cross unit of dispatching.Especially the appearance of high-speed serial I more its professional extended capability great space is provided.The present invention relates to the problem of the signal integrity of high-speed serial signals line (2.5Gb/s even higher); High speed and the clog-free and two problems of broadcasting of jumbo cross unit clean culture; Arrive the elimination of a plurality of input ports data-bias of cross unit; Guarantee professional seamless switching during the cross-over configuration change; The protection switch time of 50ms.In addition, realize the cross unit of a flexibility and reliability, chi structure also requires careful consideration.Two chi structures commonly used are respectively space division cross and this (CLOS) of clo intersection, and CLOS intersects for realizing that bigger cross matrix is more favourable, and what relate to here is a CLOS cross matrix based on the T-S-T tertiary structure.
Description of drawings
Fig. 1 is the connected mode schematic diagram of Synchronous Optical Network/synchronous digital hierarchy ply-yarn drill and cross unit;
Fig. 2 is the empty schematic diagram that divides the time-division cross unit of time-division;
Fig. 3 is the 2.5Gb/s data flow;
Fig. 4 is the empty time-division cross unit internal structure of dividing of time-division;
Fig. 5 is the schematic diagram of three kinds of implementation methods of multicast;
Fig. 6 is separating unicast (1: 1), the professional flow chart of two broadcasting (1: 2);
Fig. 7 is two flow charts of broadcasting professional configuration path method;
Fig. 8 is the flow chart of the configuration path method of unicast service.
Embodiment
Describe know-why of the present invention in detail below in conjunction with accompanying drawing.
Cross unit hardware is realized
The design utilizes 2.5Gb/s high-speed serial I/O to connect SDH ply-yarn drill and cross unit, provides a kind of feasible program (as Fig. 1) to the exploitation of big capacity Synchronous Optical Network/synchronous digital hierarchy (SDH/SONET) system (10G/40G and above system).Fig. 1 is a kind of connectivity scenario of Synchronous Optical Network/synchronous digital hierarchy (SDH/SONET) ply-yarn drill and cross unit.
Fig. 2 is the cross unit schematic diagram that can handle the T-S-T that the minimal service particle is STS-1 (time-division-sky branch-time-division) structure.
The input of input port 1..72 and output port 1..72 are respectively the SONET OC-48 or the SDH STM-16 scrambled code equivalence serial data stream of 2.5Gb/s speed, its interface adopts difference LVDS (low-voltage differential signal) technology or CML (CML) technology, the effectively integrality of inhibit signal.
Input is handled and the function that realizes physical media coupling (PMA) and Physical Coding Sublayer (PCS) is handled in output.
Because the signal of 2.5Gb/s also has to transmit 40 inches even longer distance, so high-speed line also needs a careful method for designing.During the PCB line of high speed signal by realizing with FR4 or similar sheet material, tangible loss will take place.It has seriously limited high speed signal and has received and separating of sending.Its direct result causes intersymbol interference (ISI) exactly, make signal the receiving terminal recovered clock and when resetting data will go wrong.So we can afford redress to it at high frequency.
Adopt the method for two kinds of compensation, a kind of is to compensate at receiving terminal, cries to receive equilibrium.Another kind of compensation is to carry out precompensation at transmitting terminal, that is to say preemphasis.
In addition, for best control signal integrality, good PCB placement-and-routing technology and differential signal terminal technology also will be employed.
Below be that cross unit clean culture (1: 1) reaches two broadcast (1: 2) method and realizations.
In order better to explain the T-S-T chi structure, explain several nouns first.Particle is the least unit of intersecting, and here is STS-1.One frame signal is made up of a plurality of particles, and the signal of 2.5Gb/s is made up of 48 particles (STS-1) here.The 2.5Gb/s data flow that enters input port then is made up of continuous signal frame, as shown in Figure 3.
Fig. 4 is an empty internal structure of dividing the time-division cross unit of time-division.
Inlet cross-interaction matrix of time division after input is handled receives from what input processing module was sent here decides intersection particle behind the frame, can do any exchange to time slot m at the time slot 1 of same port, then signal is sent to the space division cross matrix.The inlet time-division cross unit here go into to hold time slot: going out to hold time slot is 1: 2 redundant configuration, to guarantee the strictly non-blocking of unicast service.
The space division cross unit receives the intersection particle after the alignment of bringing from n time-division cross unit, can do any exchange to port n at the port one of same empty burst, then the particle after the intersection is sent to sub matrix when exporting.
The function that sub matrix is finished during outlet is identical with the inlet cross-interaction matrix of time division, and the signal after only it intersects is sent to output processing circuit.The outlet time-division cross unit here go into to hold time slot: going out to hold time slot is 1: 2 redundant configuration, to guarantee the strictly non-blocking of unicast service.
Realize the basic demand of UPSR (unidirectional path protection ring)/BLSR (two-direction duplexing section guard ring) that two multicast functions are Synchronous Optical Network/synchronous digital hierarchy (SONET/SDH).Two implementation methods of broadcasting have three kinds, are respectively twoly to broadcast (spatial muticast), time-division and twoly broadcast (temporal multicast) and double mode pair and broadcast (dual-modemulticast) the empty branch, as shown in Figure 5.We adopt the empty pair methods of broadcasting of dividing to realize two broadcasting.
Configuration divides four to go on foot realization, will two broadcast professional and unicast service separate configuration.The first step: receive the business configuration and the business configuration of separating unicast (1: 1), two broadcasting (1: 2) therefrom, and it is stored in the corresponding array; Second step: broadcast with two that (1: 2) professional configuration path acquisition methods configuration is two to be broadcast two in the formation and broadcast (1: 2) business configuration request; The 3rd step: according to clean culture (1: 1) the business configuration request in the configuration path acquisition method configuration unicast queue of clean culture (1: 1) business; The 4th step: report configuration realization situation to webmaster.
Method is described for convenience, does the definition of following variable before description:
PortINx---ingress port;
SlotINx---inlet time slot;
PortOUTx---outlet port;
SlotOUTx---outlet time slot;
X_CONNECT (portIN, slotIN, portOUT, slotOUT)---a business configuration request;
X_CONNECT (portIN, slotIN, portOUT1, slotOUT1) and X_CONNECT (portIN, slotIN, portOUT2 slotOUT2) is (portIN, slotIN) to (portIN1, slotIN1) and (portIN2, slotIN2) two broadcast the business configuration request;
First step specific implementation method: see Fig. 6 separating unicast (1: 1), the professional flow process of two broadcasting (1: 2)
The all business configuration requests of mark are 0; Get a business configuration request X_CONNECT (portINx earlier, slotINx, portOUTx, slotOUTx), if in other surplus lines configuring request, can find an X_CONNECT (portINy, slotINy, portOUTy, slotOUTy), portINx=portINy wherein, slotINx==slotINy, two identical business configuration requests promptly enter the mouth, then put it into as two and broadcast formation, become one group of two configuring request X_CONNECT (portIN, slotIN of broadcasting, portOUTx, slotOUTx) and X CONNECT (portIN, slotIN, portOUTy, slotOUTy), simultaneously these two configuring request are labeled as 1; Otherwise put it into unicast queue, simultaneously this configuring request is labeled as 1; So repeat to and finish all configuring request.
The second step specific implementation method: see that the two configuration paths of broadcasting business of Fig. 7 obtain the method flow process
When receive a configuring request X_CONNECT (portIN, slotIN, portOUT1, in the time of slotOUT1), get simultaneously its corresponding concurrent configuring request X_CONNECT (portIN, slotIN, portOUT2, slotOUT2); Begin to check that if the ingress port portIN in this sheet and outlet port portOUT1, portOUT2 are the not time spent, this sky burst can be used as this cross-over configuration from first sky burst; So the ingress port portIN in this sky burst and outlet port portOUT1, portOUT2 all are labeled as and use, and with ingress port portIN and outlet port portOUT1 connection, ingress port portIN and outlet port portOUT2 connection, but the pairing time slot of this spatial pieces may be inconsistent with the slotIN of inlet time-division, so need when inlet, to do time gas exchange in the sub matrix, in like manner when outlet, do time gas exchange in the sub matrix.If ingress port portIN in this sheet or outlet port portOUT1 or portOUT2 are marked as the time spent, just abandon this sheet, get another sky burst and check the corresponding port, until finding available empty burst; If institute is free burst all not meet the demands, promptly block, should turn to fault processing, fault processing is used for realizing mistake to webmaster report configuring request.
The 3rd step specific implementation method: the configuration path of seeing Fig. 8 unicast service obtains the method flow process
In empty sub matrix, there are how many time slots how many corresponding empty bursts are just arranged in the sub matrix when corresponding, ingress port and outlet port at first all are labeled as and do not use in each empty burst.When receiving configuring request X_CONNECT (portIN, slotIN, a portOUT, slotOUT) time, begin to check that if ingress port portIN in this sheet and outlet port portOUT are the not time spent, this sky burst can be used as this cross-over configuration from first sky burst; So the ingress port portIN in this sky burst and outlet port portOUT all be labeled as use, and with ingress port portIN and outlet port portOUT connection, but the pairing time slot of this spatial pieces may be inconsistent with the slotIN of inlet time-division, so need when inlet, to do time gas exchange in the sub matrix, in like manner when outlet, do time gas exchange in the sub matrix.If ingress port portIN in this sheet or outlet port portOUT are marked as the time spent, just abandon this sheet, get another sky burst and check the corresponding port, until finding available empty burst; If institute is free burst all not meet the demands, promptly block, should turn to fault processing, fault processing is used for realizing mistake to webmaster report configuring request.
The 4th step specific implementation method: the information that produces from the fault processing in second step and the 3rd step all is used for when webmaster reports configuration to realize mistake having taken place, remind the operator from new inspection configuration data to eliminate mistake, generation proper configuration data.
Claims (5)
1, a kind of method that realizes big capacity Synchronous Optical Network and synchronous digital hierarchy cross unit is characterized in that this method comprises the following steps:
At first will classify, promptly be divided into clean culture (1: 1) business configuration request and two (1: 2) configuring request two classes of broadcasting from the configuration that webmaster receives; Specifically comprise: all business configuration requests of mark are 0; Get a business configuration request then, this request comprises ingress port, inlet time slot, outlet port, outlet time slot, if in other surplus lines configuring request, can find another business configuration request, this request comprises ingress port, inlet time slot, outlet port, outlet time slot, wherein, ingress port is identical with last business configuration request with the inlet time slot, i.e. two business configuration requests are two identical business configuration requests of inlet, then put it into two formations of broadcasting, become one group pair and broadcast configuring request, simultaneously these two configuring request are labeled as 1; Otherwise put it into unicast queue, simultaneously this configuring request is labeled as 1; So repeat to and finish all configuring request;
Then finish two (1: 2) business configuration requests of broadcasting with two (1: 2) professional configuration path acquisition methods of broadcasting; Specifically comprise: when receiving a configuring request, this request comprises ingress port, inlet time slot, outlet port, outlet time slot, gets its corresponding concurrent configuring request simultaneously; Begin to check that if ingress port in this sheet and outlet port one, 2 are the not time spent, this sky burst can be used as this cross-over configuration from first sky burst; So ingress port in this sky burst and outlet port one, 2 all are labeled as and use, and with ingress port and outlet port one be communicated with, so ingress port or the outlet port one or 2 in the sheet is marked as the time spent, just abandon this sheet, ingress port and outlet port 2 are communicated with, but the pairing time slot of this spatial pieces may be inconsistent with the inlet time slot of inlet time-division, so need when inlet, to do time gas exchange in the sub matrix, in like manner when outlet, do time gas exchange in the sub matrix, if getting another sky burst checks the corresponding port, until finding available empty burst; If institute is free burst all not meet the demands, promptly block, should turn to fault processing, fault processing is used for realizing mistake to webmaster report configuring request;
Use the professional configuration path acquisition method of clean culture (1: 1) to finish remaining clean culture (1: 1) business configuration request then; Specifically comprise: in empty sub matrix, there are how many time slots how many corresponding empty bursts are just arranged in the sub matrix when corresponding, ingress port and outlet port at first all are labeled as and do not use in each empty burst, when receiving a configuring request, this request comprises ingress port, inlet time slot, outlet port, outlet time slot, begin to check that if ingress port in this sheet and outlet port are the not time spent, this sky burst can be used as this cross-over configuration from first sky burst; So ingress port in this sky burst and outlet port all are labeled as and use, and with ingress port and the connection of outlet port, but the pairing time slot of this spatial pieces may be inconsistent with the inlet time slot of inlet time-division, so need when inlet, to do time gas exchange in the sub matrix, in like manner when outlet, do time gas exchange in the sub matrix,, just abandon this sheet if ingress port in this sheet or outlet port are marked as the time spent, get another sky burst and check the corresponding port, until finding available empty burst; If institute is free burst all not meet the demands, promptly block, should turn to fault processing, fault processing is used for realizing mistake to webmaster report configuring request;
To dispose completion status at last and report webmaster; Specifically comprise: the information that produces from the fault processing in second step and the 3rd step all is used for when webmaster reports configuration to realize mistake having taken place, remind the operator from new inspection configuration data to eliminate mistake, generation proper configuration data.
2, the described method of claim 1 is characterized in that clean culture (1: 1) business configuration request and two (1: 2) business configuration request separate processes of broadcasting to be about to them and to be divided into two classes after receiving configuring request.
3, the described method of claim 1 is characterized in that broadcasting (1: 2) business for one group pair will realize in same empty burst, promptly realize professional concurrent request in empty sub matrix.
4, the described method of claim 1, it is characterized in that two to broadcast the path port that (1: 2) business configuration taken be disabled when calculating clean culture (1: 1) business configuration, i.e. clean culture (1: 1) business configuration can only be carried out on the completed basis of two broadcasting (1: 2) configuration.
5, the described method of claim 1 is characterized in that result with business configuration reports webmaster so that monitoring, and its rule is---if all business (comprising clean culture and two business of broadcasting) all find configuration path, then report configuration successful; Otherwise then report configuration failure.
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| CNB200310115328XA CN100455141C (en) | 2003-11-19 | 2003-11-19 | Method for realizing large capacity synchronous optical network and SDH cross unit |
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| CNB200310115328XA CN100455141C (en) | 2003-11-19 | 2003-11-19 | Method for realizing large capacity synchronous optical network and SDH cross unit |
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| CN1545367A true CN1545367A (en) | 2004-11-10 |
| CN100455141C CN100455141C (en) | 2009-01-21 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1905425B (en) * | 2005-07-28 | 2011-11-30 | 中兴通讯股份有限公司 | Method of light plate-to-light plate time slot time division optimizing configaration of SDH system |
| CN101141188B (en) * | 2007-05-23 | 2012-05-09 | 中兴通讯股份有限公司 | Method and apparatus for implementing cross matrix of optical synchronization digital transmission system |
| CN101179351B (en) * | 2006-11-07 | 2012-05-09 | 中兴通讯股份有限公司 | Dynamic allocation method for space/time division cross time slot resource of synchronous digital hierarchy equipment |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6535311B1 (en) * | 1999-12-09 | 2003-03-18 | Corning Incorporated | Wavelength selective cross-connect switch using a MEMS shutter array |
| CN1146192C (en) * | 2002-04-17 | 2004-04-14 | 华为技术有限公司 | Ethernet exchange chip output queue management and dispatching method and device |
-
2003
- 2003-11-19 CN CNB200310115328XA patent/CN100455141C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1905425B (en) * | 2005-07-28 | 2011-11-30 | 中兴通讯股份有限公司 | Method of light plate-to-light plate time slot time division optimizing configaration of SDH system |
| CN101179351B (en) * | 2006-11-07 | 2012-05-09 | 中兴通讯股份有限公司 | Dynamic allocation method for space/time division cross time slot resource of synchronous digital hierarchy equipment |
| CN101141188B (en) * | 2007-05-23 | 2012-05-09 | 中兴通讯股份有限公司 | Method and apparatus for implementing cross matrix of optical synchronization digital transmission system |
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| CN100455141C (en) | 2009-01-21 |
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