CN1983893B - Method and device for dispatching synchronous digital system virtual container - Google Patents
Method and device for dispatching synchronous digital system virtual container Download PDFInfo
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- CN1983893B CN1983893B CN2006100749542A CN200610074954A CN1983893B CN 1983893 B CN1983893 B CN 1983893B CN 2006100749542 A CN2006100749542 A CN 2006100749542A CN 200610074954 A CN200610074954 A CN 200610074954A CN 1983893 B CN1983893 B CN 1983893B
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Abstract
The invention is concerned with SDH virtual container dispatching equipment. The at least one circuitry plate products cell of SDH virtual container according to that from SDH interface, sends cell of load carrying and higher order virtual container to aimed circuitry plate by GMPS net, sends load carrying and lower order virtual container to the said lower order virtual container dispatching veneer and renews cell of the said GMPS net as SDH virtual container and SDH frame and exports through SDH interface. The lower order virtual container dispatching veneer carries time slot switching about lower order virtual container to product new cell and make the purpose address of all lower order virtual containers carried by each cell are the same, then send to its purpose circuitry plate by GMPS net. It also introduces a kind of SDH virtual container dispatching method. This equipment and method products SDH higher order virtual container dispatching and lower order virtual container dispatching with low cost and keeps the small delay of lower order virtual container dispatching.
Description
Technical field
The present invention relates to the switching network technology, specially refer to and utilize unified multi-service packet switch (GMPS, General Multi-Service Packet Switch) technology realizes the device and method of SDH (Synchronous Digital Hierarchy) (SDH, Synchronous Digital Hierarchy) virtual container scheduling.
Background technology
Along with the continuous evolution of network, be badly in need of a kind of operation exchange platform that can realize the unified exchange of multiple business such as time division multiplexing (TDM, Time Division Multiplex) business and data service at present.For this reason, unified multi-service packet switch (GMPS, General Multi-Service Packet Switch) technology is arisen at the historic moment, it at first will be encapsulated as the form of cell from various types of uniform service of each integrated circuit board of device interior, and then realize the unified exchange of all kinds business between each integrated circuit board of device interior in the mode of cell switching.
Wherein, how to utilize GMPS to realize that the exchange of TDM business is to realize that multi-service unifies one of problem that exchange must solve.Owing to mainly transmit usually in present stage TDM business, will describe the method for utilizing the GPMS technology to realize the TDM operation exchange at present in detail with the example that is scheduling to of SDH virtual container below by the SDH mode.Here, after the scheduling of described SDH virtual container is meant the content of carrying in certain high-order of certain SDH virtual container port in the equipment or the Lower Order Virtual Container is passed through this equipment as a whole, from certain high-order of certain SDH virtual container port of this equipment or the process of Lower Order Virtual Container output, the expense in the process in the virtual container may be modified.
Fig. 1 has shown the internal structure of utilizing GPMS to realize the device of SDH virtual container scheduling at present.As shown in Figure 1, described virtual container dispatching device comprises at least one wiring board (wiring board 1～N), and the GMPS net that connects described at least one wiring board.Wherein, each wiring board further comprises: SDH frame processing module, corresponding section module and Knockdown block with it.Described SDH frame processing module specifically is meant the frame of deciding of SDH frame, expense, and the pointer processing module, it is used for the SDH frame that receives by the SDH interface is carried out processing such as pointer processing and overhead processing on the one hand, sends to corresponding section module then; The SDH frame from Knockdown block that is used for receiving on the other hand carries out deciding Business Processing such as frame, pointer processing and overhead processing, sends by the SDH interface then; Described section module functions is to carry out corresponding slicing treatment according to the scheduling granularity from the SDH frame of described SDH frame processing module, for example: such as reception SDH frame need dispatch is that higher order virtual container is then cut into slices to the code stream that comprises higher order virtual container, as the needs scheduling is that Lower Order Virtual Container is then cut into slices to the code stream that comprises Lower Order Virtual Container, add the header that comprises destination address before the data after section then, thereby the SDH frame is converted to the cell that unified multi-service packet switching network can be discerned, sends to the purpose wiring board by described GMPS net again; Described Knockdown block is carried out and the opposite process of described section module, and the cell assembling that is about to net from described GMPS becomes the SDH frame and sends to described SDH frame processing module.
This shows, can realize the higher order virtual container scheduling and the Lower Order Virtual Container scheduling of SDH virtual container by above-mentioned SDH virtual container dispatching device.But, still have the following disadvantages:
1, the time delay of Lower Order Virtual Container scheduling is bigger.
This is because described section module is to cut into slices according to the scheduling granularity of this SDH frame when the SDH frame is cut into slices, and, in slicing processes, the section module only could generate a cell and send to described unified multi-service packet switching network and carry out cell switching after the payload of a cell is all filled, therefore, the formation speed of cell is relevant with the speed of the business code flow that needs scheduling.By way of example, the payload length of supposing the cell that described unified multi-service packet switching network exchanges is 32 bytes (Byte), if higher order virtual container VC-4 is cut into slices to the code stream that comprises higher order virtual container, then can fill the payload of 32Byte with the speed of about 140 mbit/(Mbps), in this case, approximately need 4 microseconds (us) just can generate a cell, and if Lower Order Virtual Container VC-12 is cut into slices to the code stream that comprises Lower Order Virtual Container, then will fill the payload of 32Byte with the speed of about 2Mbps, this approximately needs 125us could generate a cell, in view of this, when adopting said method to carry out the Lower Order Virtual Container scheduling, the scheduling time delay is very big.Those of ordinary skill in the art are appreciated that the SDH virtual container is very high to the requirement of time delay, and therefore, said method is difficult to satisfy the real-time requirement of SDH virtual container.
2, realize that cost is higher.
From virtual container dispatching device shown in Figure 1 as can be seen, the section of corresponding each SDH frame processing module and the scheduling that Knockdown block all needs to consider simultaneously higher order virtual container and Lower Order Virtual Container, like this, the realization of each section module and Knockdown block will be very complicated, thereby cause increasing of system cost.Specifically, for example the port of a STM-64 has 4032 low order Virtual Channels in limiting case and need carry out virtual container scheduling, at this moment, described handover module and Knockdown block just need be cut into slices respectively and assemble 4032 code streams, to cause the realization of described section module and Knockdown block very complicated thus, and then cause the increase of system cost.
Summary of the invention
In order to solve the problems of the technologies described above, to the invention provides a kind of dispatching device of virtual container cheaply, and can reduce the time delay of virtual container scheduling.
The present invention also provides a kind of method of virtual container scheduling, can realize fast dispatch to low order SDH virtual container.
SDH virtual container dispatching device of the present invention comprises: at least one wiring board and the Lower Order Virtual Container scheduling veneer that are connected to the GMPS net; Wherein,
Described at least one wiring board is used for that the SDH frame from the SDH interface is carried out pointer to be handled and overhead processing, carry out slicing treatment according to the code stream that comprises higher order virtual container then, and add before the data after section and comprise the destination address header, generate the cell that the GMPS net can be discerned, the cell that will carry the SDH virtual container that needs the higher order virtual container scheduling by the GMPS net sends to its purpose wiring board, need the cell of the SDH virtual container of Lower Order Virtual Container scheduling to send to described Lower Order Virtual Container scheduling veneer carrying, and will revert to the SDH virtual container from the cell of described GMPS net, further generate the SDH frame, then by the output of SDH interface;
Described Lower Order Virtual Container scheduling veneer is used for recovering higher order virtual container from the cell that is received, generate the SDH frame, then through searching frame and pointer handle from the SDH frame, obtain carrying out the Lower Order Virtual Container of Lower Order Virtual Container scheduling after, the SDH virtual container that the needs that cell carried from described GMPS net is carried out the Lower Order Virtual Container scheduling carries out the time slot intersection, the frame operation of regenerating of Lower Order Virtual Container after time slot intersected obtains new SDH frame, and new SDH frame cut into slices according to the code stream that comprises higher order virtual container, regenerate new cell, it is identical to make all of being carried in each cell need carry out the destination address of SDH virtual container of Lower Order Virtual Container scheduling, sends to its purpose wiring board by the GMPS net then.
Described wiring board comprises: SDH frame processing module, and the high-order corresponding with described SDH frame processing module section module and high-order Knockdown block; Wherein,
Described SDH frame processing module is used for receiving the SDH frame from the SDH interface on the one hand, and the SDH frame is carried out sending to described high-order section module after overhead processing, the pointer processing; Be used to receive from the SDH frame of described high-order Knockdown block on the other hand and handle the back and send by the SDH interface;
Described high-order section module is used for the SDH frame from described SDH frame processing module is carried out slicing treatment according to the code stream that comprises higher order virtual container, and add before the data after section and comprise the destination address header, the SDH frame is converted to the cell that the GMPS net can be discerned, sends by the GMPS net;
Described high-order Knockdown block is used for the cell from described GMPS net is assembled into higher order virtual container, further generates the SDH frame and sends to pairing SDH frame processing module.
Described SDH virtual container dispatching device further comprises: another Lower Order Virtual Container scheduling veneer that is connected to described GMPS net, be used for recovering higher order virtual container from the cell that is received, generate the SDH frame, handle through searching frame and pointer then, after from the SDH frame, obtaining to carry out the Lower Order Virtual Container of Lower Order Virtual Container scheduling, the SDH Lower Order Virtual Container that the needs that cell carried from described GMPS net is carried out the Lower Order Virtual Container scheduling carries out the time slot intersection, the frame operation of regenerating of Lower Order Virtual Container after time slot intersected obtains new SDH frame, and new SDH frame cut into slices according to the code stream that comprises higher order virtual container, regenerate new cell, and make the destination address of all Lower Order Virtual Containers that carried in each cell identical.
Described Lower Order Virtual Container scheduling veneer comprises: low order scheduler module and corresponding with it high-order section module and high-order Knockdown block; Wherein,
Described high-order Knockdown block further generates the SDH frame and sends to pairing low order scheduler module in being assembled into higher order virtual container from the cell of described GMPS net;
Described low order scheduler module is used for the SDH frame from the high-order Knockdown block is handled through searching frame and pointer, parse the Lower Order Virtual Container that need carry out the low order scheduling, the Lower Order Virtual Container that parses is carried out time slot according to its destination address to intersect, the frame operation of regenerating of Lower Order Virtual Container after time slot intersected regenerates new SDH frame, makes that the purpose wiring board of all Lower Order Virtual Containers that each SDH frame is carried is identical;
Described high-order section module is used for the new SDH frame that described low order scheduler module generates is carried out slicing treatment according to the code stream that comprises higher order virtual container, and adding comprises the header of destination address, generate the cell that described unified multi-service packet switching network can be discerned, and send to its purpose wiring board by described GMPS net.
Described low order scheduler module comprises: search frame unit, be used for the SDH frame from the high-order Knockdown block is searched frame, find expense A1, the position of A2; The pointer processing unit is used for searching the A1 that frame unit provides according to described, and the A2 indication is found administrative unit AU pointer, and then found tributary unit TU pointer, carries out then after pointer handles, all Lower Order Virtual Containers that obtain among the SDH being comprised; The first low order overhead processing unit is used for carrying out the low order overhead processing from the Lower Order Virtual Container of pointer processing unit after pointer is handled; The time slot cross unit is used for intersecting to carrying out time slot from the Lower Order Virtual Container of low order overhead processing unit after the low order overhead processing according to its destination address; The second low order overhead processing unit is used for carrying out the regeneration of low order expense according to the Lower Order Virtual Container after the time slot intersection, obtains new low order expense; The regeneration frame unit is used for bearing complete SDH frame again according to Lower Order Virtual Container and low order expense after the time slot intersection, outputs to described high-order section module then.
Described low order scheduler module comprises: search frame unit, be used for the SDH frame from the high-order Knockdown block is searched frame, find expense A1, the position of A2; The pointer processing unit is used for searching the A1 that frame unit provides according to described, and the A2 indication is found administrative unit AU pointer, and then found tributary unit TU pointer, carries out then after pointer handles, all Lower Order Virtual Containers that obtain among the SDH being comprised; The time slot cross unit is used for carrying out the time slot intersection to handle single Lower Order Virtual Container from pointer according to its destination address; The regeneration frame unit is used for bearing complete SDH frame again according to the Lower Order Virtual Container after the time slot intersection, outputs to described high-order section module then.
According to a further aspect in the invention, described dispatching synchronous digital system virtual container method comprises:
A, after receiving the SDH frame by the SDH interface, wiring board carries out pointer to the SDH frame that is received to be handled and overhead processing, carry out slicing treatment according to the code stream that comprises higher order virtual container then, and add before the data after section and comprise the destination address header, generate the cell that the GMPS network can be discerned, and send by described GMPS network, wherein, if described SDH virtual container data are Lower Order Virtual Container data, then described cell is sent to Lower Order Virtual Container scheduling veneer, execution in step B then; If described SDH virtual container data are higher order virtual container data, then described cell is directly sent to the purpose wiring board of these higher order virtual container data, then execution in step C;
B, described Lower Order Virtual Container scheduling veneer is behind the cell that receives the carrying Lower Order Virtual Container, recover higher order virtual container from the cell that is received, and then generation SDH frame, handle by searching frame and pointer then, from described SDH frame, obtain to carry out the Lower Order Virtual Container of Lower Order Virtual Container scheduling, from described cell, recover the Lower Order Virtual Container data that to carry out the Lower Order Virtual Container scheduling, and described Lower Order Virtual Container data are carried out time slot intersect, the frame operation of regenerating of Lower Order Virtual Container after time slot intersected obtains new SDH frame, and new SDH frame cut into slices according to the code stream that comprises higher order virtual container, generate the cell that new GMPS network can be discerned, make the destination address of the Lower Order Virtual Container data of carrying in each cell identical, by the GMPS network cell that is generated is sent to its purpose wiring board then, then execution in step C;
C, described purpose wiring board will recover SDH higher order virtual container data from the cell that is received, and then will generate the SDH frame and send by the SDH port.
This shows, can realize higher order virtual container scheduling and the Lower Order Virtual Container scheduling of SDH simultaneously by virtual container dispatching device of the present invention and method, and owing to dispatch for Lower Order Virtual Container, do not need each wiring board to carry out Lower Order Virtual Container section and Lower Order Virtual Container assembling separately, but realize that by Lower Order Virtual Container scheduling veneer the time slot of Lower Order Virtual Container intersects, thereby can reduce the time delay of Lower Order Virtual Container scheduling greatly, improve the performance of virtual container scheduling.
In addition, because in virtual container dispatching device of the present invention and method, high-order on each wiring board section module and high-order Knockdown block only need to realize the code stream that comprises higher order virtual container is cut into slices and the assembly operation of higher order virtual container, and do not need to realize the code stream that comprises Lower Order Virtual Container is cut into slices and the Lower Order Virtual Container assembly operation, thereby can reduce the realization of each wiring board greatly, and then greatly reduce the cost of virtual container dispatching device.
Description of drawings
Fig. 1 is the existing internal structure schematic diagram of realizing the device of SDH virtual container scheduling;
Fig. 2 is the internal structure schematic diagram of realization SDH virtual container dispatching device of the present invention;
Fig. 3 is the internal structure schematic diagram of the inner low order scheduler module of virtual container dispatching device of the present invention;
Fig. 4 is the flow chart of realization SDH virtual container dispatching method of the present invention.
Embodiment
For the purpose, technical scheme and the advantage that make invention is clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, the present invention is described in further detail.
In order to solve problems such as existing SDH virtual container dispatching device cost height and Lower Order Virtual Container scheduling time delay are big, the invention provides a kind of SDH virtual container dispatching device, its internal structure mainly comprises as shown in Figure 2: at least one wiring board (wiring board 1～N), Lower Order Virtual Container scheduling veneer and the GMPS net that connects described at least one Line cards, Lower Order Virtual Container scheduling veneer.
Wherein, described wiring board is used for generating the cell that the GMPS net can be discerned according to the SDH virtual container from the SDH interface, and will revert to the SDH virtual container from the cell of described GMPS net and then generate the SDH frame by the output of SDH interface.Particularly, each wiring board inside further comprises a SDH frame processing module and high-order section module and the high-order Knockdown block corresponding with described SDH frame processing module.
Wherein, the function of described SDH frame processing module is identical with the function of existing SDH frame processing module, promptly is used on the one hand the SDH frame that receives by the SDH interface is carried out Business Processing such as pointer processing and overhead processing, sends to described high-order section module then; The SDH frame from described high-order Knockdown block that is used for receiving on the other hand carries out deciding Business Processing such as frame, pointer processing and overhead processing, sends by the SDH interface then;
Described high-order section module is used for the SDH frame from described SDH frame processing module is carried out slicing treatment according to the code stream that comprises higher order virtual container, and add before the data after section and comprise the destination address header, thereby the SDH frame is converted to the cell that the GMPS net can be discerned, sends to described GMPS net and carry out cell switching.Especially, carry out the Lower Order Virtual Container of low order scheduling for needs, will be when high-order is cut into slices according to the code stream of the higher order virtual container that comprises the low order virtual container generation cell of cutting into slices, the destination address of the cell that generates will be the address of described Lower Order Virtual Container dispatching board; And the higher order virtual container that carries out high-order scheduling for needs, according to the code stream that comprises this higher order virtual container generation cell of cutting into slices, the destination address of the cell that generates will be the address of the purpose wiring board of this SDH higher order virtual container that frame carries when high-order is cut into slices;
Described high-order Knockdown block is used for the cell from described GMPS net is assembled into higher order virtual container, further generates the SDH frame and sends to pairing SDH frame processing module.
Above Lower Order Virtual Container scheduling veneer in the described SDH virtual container dispatching device be mainly used in the virtual container that the needs that cell carried from described GMPS net are carried out the Lower Order Virtual Container scheduling and carry out time slot and intersect, and regenerate the cell that new GMPS network can be discerned by the high-order slicing treatment, make the destination address of all Lower Order Virtual Containers that carried in each cell identical, thereby make the cell that is generated to send to same purpose wiring board by described GMPS net is unified, and do not need Lower Order Virtual Container is carried out the low order slicing treatment.
Lower Order Virtual Container scheduling veneer of the present invention inside specifically comprises: a low order scheduler module and corresponding with it high-order section module and high-order Knockdown block.
Wherein, described high-order Knockdown block further generates the SDH frame and sends to pairing low order scheduler module in being assembled into higher order virtual container from the cell of described GMPS net;
Described low order scheduler module is used for parsing the Lower Order Virtual Container that need carry out the low order scheduling from the SDH frame from the high-order Knockdown block, the Lower Order Virtual Container that parses is carried out time slot according to its destination address to intersect, after time slot intersects, regenerate new SDH frame, make that the purpose wiring board of all Lower Order Virtual Containers that higher order virtual container carried in each SDH frame is identical;
Described high-order section module is used for the new SDH frame that described low order scheduler module generates is carried out slicing treatment according to the code stream that comprises higher order virtual container, and adding comprises the header of destination address, generate the cell that described unified multi-service packet switching network can be discerned, send to described GMPS net and carry out cell switching.This moment, the destination address of the cell that generates was the destination address of the Lower Order Virtual Container that this cell carried.
In order to realize that above-mentioned functions the present invention gives the internal structure of described low order scheduler module, as shown in Figure 3, mainly comprises:
Search frame unit, be used for the SDH frame from the high-order Knockdown block is searched frame, find expense A1, the position of A2;
The pointer processing unit is used for searching the A1 that frame unit provides according to described, and the A2 indication is found administrative unit (AU) pointer, and then found tributary unit (TU) pointer, carries out then after pointer handles, all Lower Order Virtual Containers that obtain among the SDH being comprised;
The first low order overhead processing unit is used for carrying out the low order overhead processing from the Lower Order Virtual Container of pointer processing unit after pointer is handled;
The time slot cross unit is used for intersecting to carrying out time slot from the Lower Order Virtual Container of low order overhead processing unit after the low order overhead processing according to its destination address;
The second low order overhead processing unit is used for carrying out the regeneration of low order expense according to the Lower Order Virtual Container after the time slot intersection, obtains new low order expense;
The regeneration frame unit is used for bearing complete SDH frame again according to Lower Order Virtual Container and low order expense after the time slot intersection, outputs to described high-order section module then.
Wherein, the described first low order overhead processing unit and the second low order overhead processing unit are optional.
This shows that above-mentioned low order scheduler module can realize that the time slot of Lower Order Virtual Container intersects, thereby the Lower Order Virtual Container that has identical destination address in the reception SDH frame is crossed in the higher order virtual container identical in the new SDH frame.
Describe the present invention below in conjunction with Fig. 2 in detail by specific embodiment and carry out the virtual container dispatching method by described SDH virtual container dispatching device.
Embodiment 1: the method for carrying out the higher order virtual container scheduling.
The SDH interface of supposing wiring board 1 shown in Figure 2 is the interface of STM-4, wherein the 1st VC4 carried is the higher order virtual container that does not need to carry out the Lower Order Virtual Container scheduling, and its purpose wiring board is wiring board N.In this case, the high-order section module of wiring board 1 will directly be cut into slices according to the code stream that comprises this higher order virtual container to the SDH frame that comprises described the 1st VC4, generating destination address is the cell of wiring board N address, and by the GMPS net cell that is generated is sent to wiring board N.At this moment, directly obtain comprising described the 1st VC4 after the high-order Knockdown block of wiring board N is assembled the cell that is received, and then generate the SDH frame.
Embodiment 2: the method for carrying out the Lower Order Virtual Container scheduling.
The SDH interface of supposing wiring board 1 shown in Figure 2 is the interface of STM-4, and wherein the 2nd VC4 comprises the VC12 that 63 needs carry out the low order scheduling, and the purpose wiring board of the 1st VC12 wherein is wiring board N.In this case, the high-order section module of wiring board 1 will directly be cut into slices according to the code stream that comprises higher order virtual container to the SDH frame that comprises described the 2nd VC4, generating destination address is the cell of Lower Order Virtual Container scheduling veneer address, and by the GMPS net cell that is generated is sent to described Lower Order Virtual Container scheduling veneer.Behind the cell of receiving from wiring board 1, after assembling the cell that is received, the high-order Knockdown block of described Lower Order Virtual Container scheduling veneer obtains comprising from wiring board 1 described the 2nd VC4, and then generation SDH frame, then through the inner frame of searching, pointer is handled, overhead processing, time slot intersects, behind overhead processing and the regeneration frame, obtain new SDH frame, comprising the above-mentioned purpose wiring board in a certain higher order virtual container of this SDH frame is the 1st VC12 of wiring board N, and intersect by described time slot, guarantee that the purpose wiring board of other Lower Order Virtual Containers of being comprised in this higher order virtual container of this SDH frame also is wiring board N.Like this, after generating new SDH frame, the high-order section module of described Lower Order Virtual Container scheduling veneer is cut into slices new SDH frame according to the code stream that comprises higher order virtual container, obtain the cell that destination address is wiring board N address, and by the GMPS net cell that is generated is sent to wiring board N once more.After assembling the cell that is received, the high-order Knockdown block of wiring board N obtains the described higher order virtual container that comprises the 1st VC12, because the purpose wiring board of other Lower Order Virtual Containers is wiring board N in this higher order virtual container, therefore, wiring board is exported from the SDH interface after can directly this higher order virtual container being mapped to the SDH frame.
As can be seen from the above-described embodiment, can realize higher order virtual container scheduling and the Lower Order Virtual Container scheduling of SDH simultaneously by device of the present invention, and owing to dispatch for Lower Order Virtual Container, do not need each wiring board to carry out Lower Order Virtual Container section and Lower Order Virtual Container assembling, realize that the time slot of Lower Order Virtual Container intersects and can dispatch veneer by Lower Order Virtual Container, thereby can reduce the time delay of Lower Order Virtual Container scheduling greatly, improve the performance of virtual container scheduling.And, because section module of the high-order on each wiring board and high-order Knockdown block only need to realize high-order section and high-order assembly operation, and do not need to realize low order section and low order assembling, thereby can reduce the implementation complexity of each wiring board greatly, thus reduce the cost of system.
In order further to guarantee the reliability of above-mentioned SDH virtual container dispatching device, guarantee when described Lower Order Virtual Container scheduling veneer breaks down, still can carry out the Lower Order Virtual Container scheduling, can increase a standby Lower Order Virtual Container scheduling veneer in described SDH virtual container dispatching device, Lower Order Virtual Container scheduling veneer originally will be dispatched veneer with Lower Order Virtual Container as main.The internal structure of described standby Lower Order Virtual Container scheduling veneer is identical with the internal structure of Lower Order Virtual Container scheduling veneer with the master shown in Fig. 2, and also is connected on the described GMPS network.Described standby Lower Order Virtual Container scheduling veneer is used for taking over described master and carrying out the Lower Order Virtual Container scheduling with Lower Order Virtual Container scheduling veneer described master dispatches the veneer operation irregularity or breaks down with Lower Order Virtual Container when.
Under normal circumstances, the GMPS network can be that the cell of described Lower Order Virtual Container scheduling veneer sends to described primary and backup Lower Order Virtual Container scheduling veneer simultaneously with destination address, and only selective reception from the cell of described master with Lower Order Virtual Container scheduling veneer.And when described master is broken down with Lower Order Virtual Container scheduling veneer, described master will reduce to standby board with Lower Order Virtual Container scheduling veneer, and described standby Lower Order Virtual Container scheduling veneer will upgrade to the main veneer of using, like this, the main cell that described GMPS network just can selective reception be made a fresh start with veneer (former standby board), thus normally carrying out of Lower Order Virtual Container scheduling guaranteed.
Except above-mentioned SDH virtual container dispatching device, the present invention also provides a kind of method of utilizing above-mentioned SDH virtual container dispatching device to realize the scheduling of SDH virtual container, as shown in Figure 4, mainly may further comprise the steps:
A, after receiving SDH virtual container data by the SDH interface, wiring board is according to the SDH virtual container data that received, generate the cell that the GMPS network can be discerned, and send by described GMPS network, wherein, if described SDH virtual container data are Lower Order Virtual Container data, then send to Lower Order Virtual Container scheduling veneer, execution in step B then; If described SDH virtual container data are higher order virtual container data, then directly send to the purpose wiring board of these higher order virtual container data, then execution in step C.
The described cell that can discern according to the SDH virtual container data generation GMPS network that is received of this step comprises: generate the SDH frame according to the SDH virtual container data that received; The SDH frame that is generated cut into slices according to the code stream that comprises higher order virtual container obtain the cell that described GMPS network can be discerned.
B, described Lower Order Virtual Container scheduling veneer are behind the cell of the higher order virtual container that receives carrying Lower Order Virtual Container place, from described cell, recover the Lower Order Virtual Container data that to carry out the Lower Order Virtual Container scheduling, and described Lower Order Virtual Container data are carried out time slot intersect, and generate the cell that new GMPS network can be discerned, make the destination address of the Lower Order Virtual Container data of carrying in each cell identical, by the GMPS network cell that is generated is sent to its purpose wiring board then, then execution in step C.
The described Lower Order Virtual Container data that need carry out the Lower Order Virtual Container scheduling that recover of this step comprise: recover higher order virtual container from the cell that is received, and then generation SDH frame, then by searching frame, pointer processing and low order overhead processing, the Lower Order Virtual Container that from described SDH frame, obtains to carry out the Lower Order Virtual Container scheduling.
The cell that the new GMPS network of the described generation of this step can be discerned comprises: the Lower Order Virtual Container after time slot is intersected carries out the low order overhead processing and the operation of regeneration frame obtains new SDH frame, and then described new SDH frame carried out sectioning according to the code stream that comprises higher order virtual container, obtain the cell that described new GMPS network can be discerned.
C, described purpose wiring board will recover SDH virtual container data from the cell that is received, and will send by the SDH port.
The described SDH of the recovering virtual container of this step data comprise: recover higher order virtual container from the cell that is received, and then generate the SDH frame, then described SDH frame is carried out deciding frame, pointer is handled, overhead processing.
This shows that virtual container dispatching method of the present invention also can be realized higher order virtual container scheduling and the Lower Order Virtual Container scheduling of SDH at low cost, and can guarantee that the time delay of Lower Order Virtual Container scheduling is little.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1. a SDH (Synchronous Digital Hierarchy) SDH virtual container dispatching device is characterized in that, comprising: at least one wiring board and the Lower Order Virtual Container scheduling veneer that are connected to unified multi-service packet switch GMPS net; Wherein,
Described at least one wiring board is used for that the SDH frame from the SDH interface is carried out pointer to be handled and overhead processing, carry out slicing treatment according to the code stream that comprises higher order virtual container then, and add before the data after section and comprise the destination address header, generate the cell that the GMPS net can be discerned, the cell that will carry the SDH virtual container that needs the higher order virtual container scheduling by the GMPS net sends to its purpose wiring board, need the cell of the SDH virtual container of Lower Order Virtual Container scheduling to send to described Lower Order Virtual Container scheduling veneer carrying, and will revert to the SDH virtual container from the cell of described GMPS net, further generate the SDH frame, then by the output of SDH interface;
Described Lower Order Virtual Container scheduling veneer is used for recovering higher order virtual container from the cell that is received, generate the SDH frame, then through searching frame and pointer handle from the SDH frame, obtain carrying out the Lower Order Virtual Container of Lower Order Virtual Container scheduling after, the SDH virtual container that the needs that cell carried from described GMPS net is carried out the Lower Order Virtual Container scheduling carries out the time slot intersection, the frame operation of regenerating of Lower Order Virtual Container after time slot intersected obtains new SDH frame, and new SDH frame cut into slices according to the code stream that comprises higher order virtual container, regenerate new cell, it is identical to make all of being carried in each cell need carry out the destination address of SDH virtual container of Lower Order Virtual Container scheduling, sends to its purpose wiring board by the GMPS net then.
2. SDH virtual container dispatching device according to claim 1 is characterized in that described wiring board comprises: SDH frame processing module, and the high-order corresponding with described SDH frame processing module section module and high-order Knockdown block; Wherein,
Described SDH frame processing module is used for receiving the SDH frame from the SDH interface on the one hand, and the SDH frame is carried out sending to described high-order section module after overhead processing, the pointer processing; Be used to receive from the SDH frame of described high-order Knockdown block on the other hand and handle the back and send by the SDH interface;
Described high-order section module is used for the SDH frame from described SDH frame processing module is carried out slicing treatment according to the code stream that comprises higher order virtual container, and add before the data after section and comprise the destination address header, the SDH frame is converted to the cell that the GMPS net can be discerned, sends by the GMPS net;
Described high-order Knockdown block is used for the cell from described GMPS net is assembled into higher order virtual container, further generates the SDH frame and sends to pairing SDH frame processing module.
3. SDH virtual container dispatching device according to claim 1, it is characterized in that, further comprise: another Lower Order Virtual Container scheduling veneer that is connected to described GMPS net, be used for recovering higher order virtual container from the cell that is received, generate the SDH frame, handle through searching frame and pointer then, after from the SDH frame, obtaining to carry out the Lower Order Virtual Container of Lower Order Virtual Container scheduling, the SDH Lower Order Virtual Container that the needs that cell carried from described GMPS net is carried out the Lower Order Virtual Container scheduling carries out the time slot intersection, the frame operation of regenerating of Lower Order Virtual Container after time slot intersected obtains new SDH frame, and new SDH frame cut into slices according to the code stream that comprises higher order virtual container, regenerate new cell, and make the destination address of all Lower Order Virtual Containers that carried in each cell identical.
4. according to claim 1 or 3 described SDH virtual container dispatching devices, it is characterized in that described Lower Order Virtual Container scheduling veneer comprises: low order scheduler module and corresponding with it high-order section module and high-order Knockdown block; Wherein,
Described high-order Knockdown block is used for the cell from described GMPS net is assembled into higher order virtual container, further generates the SDH frame and sends to pairing low order scheduler module;
Described low order scheduler module is used for the SDH frame from the high-order Knockdown block is handled through searching frame and pointer, parse the Lower Order Virtual Container that need carry out the low order scheduling, the Lower Order Virtual Container that parses is carried out time slot according to its destination address to intersect, the frame operation of regenerating of Lower Order Virtual Container after time slot intersected regenerates new SDH frame, makes that the purpose wiring board of all Lower Order Virtual Containers that each SDH frame is carried is identical;
Described high-order section module is used for the new SDH frame that described low order scheduler module generates is carried out slicing treatment according to the code stream that comprises higher order virtual container, and adding comprises the header of destination address, generate the cell that described unified multi-service packet switching network can be discerned, and send to its purpose wiring board by described GMPS net.
5. SDH virtual container dispatching device according to claim 4 is characterized in that, described low order scheduler module comprises:
Search frame unit, be used for the SDH frame from the high-order Knockdown block is searched frame, find expense A1, the position of A2;
The pointer processing unit is used for searching the A1 that frame unit provides according to described, and the A2 indication is found administrative unit AU pointer, and then found tributary unit TU pointer, carries out then after pointer handles, all Lower Order Virtual Containers that obtain among the SDH being comprised;
The first low order overhead processing unit is used for carrying out the low order overhead processing from the Lower Order Virtual Container of pointer processing unit after pointer is handled;
The time slot cross unit is used for intersecting to carrying out time slot from the Lower Order Virtual Container of low order overhead processing unit after the low order overhead processing according to its destination address;
The second low order overhead processing unit is used for carrying out the regeneration of low order expense according to the Lower Order Virtual Container after the time slot intersection, obtains new low order expense;
The regeneration frame unit is used for bearing complete SDH frame again according to Lower Order Virtual Container and low order expense after the time slot intersection, outputs to described high-order section module then.
6. SDH virtual container dispatching device according to claim 4 is characterized in that, described low order scheduler module comprises:
Search frame unit, be used for the SDH frame from the high-order Knockdown block is searched frame, find expense A1, the position of A2;
The pointer processing unit is used for searching the A1 that frame unit provides according to described, and the A2 indication is found administrative unit AU pointer, and then found tributary unit TU pointer, carries out then after pointer handles, all Lower Order Virtual Containers that obtain among the SDH being comprised;
The time slot cross unit is used for carrying out the time slot intersection to handle single Lower Order Virtual Container from pointer according to its destination address;
The regeneration frame unit is used for bearing complete SDH frame again according to the Lower Order Virtual Container after the time slot intersection, outputs to described high-order section module then.
7. a dispatching synchronous digital system virtual container method is characterized in that, comprising:
A, after receiving the SDH frame by the SDH interface, wiring board carries out pointer to the SDH frame that is received to be handled and overhead processing, carry out slicing treatment according to the code stream that comprises higher order virtual container then, and add before the data after section and comprise the destination address header, generate the cell that the GMPS network can be discerned, and send by described GMPS network, wherein, if described SDH virtual container data are Lower Order Virtual Container data, then described cell is sent to Lower Order Virtual Container scheduling veneer, execution in step B then; If described SDH virtual container data are higher order virtual container data, then described cell is directly sent to the purpose wiring board of these higher order virtual container data, then execution in step C;
B, described Lower Order Virtual Container scheduling veneer is behind the cell that receives the carrying Lower Order Virtual Container, recover higher order virtual container from the cell that is received, and then generation SDH frame, handle by searching frame and pointer then, from described SDH frame, obtain to carry out the Lower Order Virtual Container of Lower Order Virtual Container scheduling, from described cell, recover the Lower Order Virtual Container data that to carry out the Lower Order Virtual Container scheduling, and described Lower Order Virtual Container data are carried out time slot intersect, the frame operation of regenerating of Lower Order Virtual Container after time slot intersected obtains new SDH frame, and new SDH frame cut into slices according to the code stream that comprises higher order virtual container, generate the cell that new GMPS network can be discerned, make the destination address of the Lower Order Virtual Container data of carrying in each cell identical, by the GMPS network cell that is generated is sent to its purpose wiring board then, then execution in step C;
C, described purpose wiring board will recover SDH higher order virtual container data from the cell that is received, and then will generate the SDH frame and send by the SDH port.
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| CN1248844A (en) * | 1999-09-01 | 2000-03-29 | 信息产业部武汉邮电科学研究院 | Adaption method for integrating internet with sychronous optical network |
| CN1620186A (en) * | 2003-11-17 | 2005-05-25 | 阿尔卡特公司 | Method and apparatus for carrying out connection and related input/output processing functions |
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| CN1248844A (en) * | 1999-09-01 | 2000-03-29 | 信息产业部武汉邮电科学研究院 | Adaption method for integrating internet with sychronous optical network |
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