CN106506110A - Statistic multiplexing optical transfer network method and device - Google Patents
Statistic multiplexing optical transfer network method and device Download PDFInfo
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- CN106506110A CN106506110A CN201510557836.6A CN201510557836A CN106506110A CN 106506110 A CN106506110 A CN 106506110A CN 201510557836 A CN201510557836 A CN 201510557836A CN 106506110 A CN106506110 A CN 106506110A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0006—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format
- H04L1/0007—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the transmission format by modifying the frame length
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/08—Time-division multiplex systems
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Abstract
The invention discloses a kind of statistic multiplexing optical transfer network method and device.The method includes：In optical transfer network OTN, Packet Service is mapped to different flexible rate light data unit ODUflex by Generic Framing Procedure GFP, the idle frame of GFP is not used to carry out rate pad to ODUflex when the pipeline speed of ODUflex is not below the minimum-rate for arranging, and by the Multiplexing Technology of optical transfer network OTN, different ODUflex is multiplexed into same ODUk pipelines, when all Packet Service bandwidth account for discontented whole ODUk pipelines, the pipeline speed of ODUk is filled by the idle IDLE frames of Multiplexing Technology；The ODUk for carrying ODUflex swaps process in the intermediate node for passing through, and it is sent to destination node, when the ODUk for carrying ODUflex is sent to destination node, by ODUflex from ODUk demappings out, then by Packet Service, from ODUflex, demapping is out by GFP.
Description
Technical field
The present invention relates to optical communication field, more particularly to a kind of statistic multiplexing optical transfer network method and device.
Background technology
In the prior art, the high-order light of optical transfer network (OpticalTransportNetwork, OTN) leads to
Road payload layer (OpticalChannel Payload Unit, OPU) payload space fixed partition is multiple sizes
The same time slot；Each time slot fixes the byte number for taking as much, and OPU bandwidth (big pipeline) is just fixed
It is divided into the equal small pipeline of multiple bandwidth.The amount of bandwidth of time slot adopted 2.5G, 1.25G (100G),
10G(Beyond 100G)->5G(Beyond 100G).OPU4 is divided into 80 1.25G small pipelines,
The OPUCn of Beyond 100G OTN is divided into 20*n 5G small pipeline.Low order light data unit
(ODU) it is the multiple time slots of fixed occupancy that/ODUflex is mapped to high-order OPU.Low order ODU/ODUflex
Data must appear periodically in the fixed time slot position of every OPU frames, Bandwidth Allocation Policy is pre-
First fixed allocation.Low order ODU/ODUflex must take multiple time slot bandwidth, complete no matter bandwidth whether
Portion is utilized.Although introducing ODUflex, OTN pipelines or underaction and flexibility.Time slot
The selection of size be limited to OTN Framer chips realization complexity and with the client bandwidth of OTN
Match somebody with somebody degree.Time slot is less, and OTN Framer realize more complicated.
OTN Framer chip internals generally process the conversion processed with the time-division using space division at present, in order to subtract
Complexity is changed with the time-division in low latitude point, and in B100G OTN, the time slot in OPUCn frames adopts wider word
Internode is inserted, such as 16 bytes, but still cannot avoid the conversion of space division and time-division process.Go out in IEEE
After existing 25GE, the time slot size of B100G OTN is revised as 5G from 10G.IEEE and light networking at present
Forum (Optical Internet Forum, OIF) defines the Ethernet service of new speed discussing, for example
2.5GE, 5GE and Flex Ethernet (the multiple speed of 10GE, 25GE, 40GE and 50G), IEEE
The business of definition often affects the standard of OTN, the particularly selection of time slot granularity.
The private line service from several million, tens to hundreds of million that operator is provided for government and enterprises' netter family at present, carries
Mode has SDH (Synchronous Digital Hierarchy, SDH)/based on many of SDH
Business delivery platform (Multi-Service Transfer Platform, MSTP) (be suitable for carry less than 100,000,000) and
The transport network layer of Packet Transport Network (Packet Transport Network, PTN)/total interface uses IP
The wireless access network (Internet Protocol Radio Access Network, IPRAN) of transmission.Due to band
Wide little, OTN is not suitable for directly carrying these private line services.
Special line, the business of mobile retransmission flow for big customer, current operator is by metropolitan area
IPRAN or multiprotocol label switching-transport architecture (Multiprotocol Label Switching-
Transport Profile, MPLS-TP) pooled in metropolitan area access, convergence and metro core one by one
Big flow, finally just accesses OTN in metro core.At present these big customer's special line flows and mobile retransmission,
Domestic customers flow is superimposed in Metropolitan Area Network (MAN), unified IPRAN or MPLS-TP by Metropolitan Area Network (MAN)
To carry, as Metropolitan Area Network (MAN) flow is increasing, operator is needed big for OTN bandwidth and length in Metropolitan Area Network (MAN)
Distance Transmission is superimposed with MPLS-TP Multiplexing Technologies and transmits these flows, and reply flow is not
Disconnected increased requirement, causes multiple investment, invests multiple network equipment, manages multitiered network, and cost is very high.
Existing packet optical transfer network (Packet Optical Transport Network, POTN) be by
MPLS-TP and OTN simply carries out multitiered network and is superimposed, although can be simultaneously multiple using statistics
Transmitted with the big pipeline of technology and OTN, but network management and functions of the equipments are complicated；Need management and control simultaneously
The multitiered network of MPLS-TP and OTN；Need to be provided simultaneously with the multitiered network of MPLS-TP and OTN
OAM and protection and interlayer coordinate.
Operator's presence is in Metropolitan Area Network (MAN) introducing statistic multiplexing and the demand of big bandwidth for transmission, and current POTN
Simply simply MPLS-TP and OTN are superimposed upon to carry various packet traffics, equipment is realized and network
Complex management.
Content of the invention
In view of in prior art POTN simply simply MPLS-TP and OTN are superimposed upon various to carry
Packet traffic, the problem that equipment is realized and network management is complicated, it is proposed that the present invention is overcome to provide one kind
The problems referred to above or the statistic multiplexing optical transfer network method and device for solving the above problems at least in part.
The present invention provides a kind of statistic multiplexing optical transfer network method, including：In optical transfer network OTN, will
Packet Service is mapped to different flexible rate light data unit ODUflex by Generic Framing Procedure GFP,
The idle frame pair of GFP is not used when the pipeline speed of ODUflex is not below the minimum-rate for arranging
ODUflex carries out rate pad, and the Multiplexing Technology by optical transfer network OTN, will be different
ODUflex is multiplexed into same ODUk pipelines, accounts for discontented whole ODUk in all Packet Service bandwidth
During pipeline, the pipeline speed of ODUk is filled by the idle IDLE frames of Multiplexing Technology, its
In, k=0,1,2,2e, 3,4, Cn, Cn represents the pipeline speed of 100G multiples；Carry ODUflex
ODUk swap processs in the intermediate node for passing through, and be sent to destination node, as carrying ODUflex
ODUk when being sent to destination node, by ODUflex from ODUk demappings out, then will by GFP
Demapping is out from ODUflex for Packet Service.
Preferably, the ODUk of carrying ODUflex swaps process in the intermediate node for passing through includes：
When be mapped to same ODUk ODUflex be homologous chummage, ODUk pass through intermediate node directly hand over
Change ODUk；When the ODUflex for being mapped to same ODUk is homologous not chummage, during ODUk is passed through
Intermediate node, by the ODUflex from upstream node from ODUk demappings out, make ODUflex pass through
The cross matrix of OTN, exchanges to different Way outs, in ODUflex after cross matrix, leads to
The ODUflex that intermediate node goes to next identical downstream node is crossed, by Multiplexing Technology, is mapped
Arrive one ODUk of identical.
Preferably, said method is further included：One is arranged most for carrying the ODUflex of Packet Service
Little speed, minimum-rate disclosure satisfy that the channel layer monitoring PM of transmission ODUflex and section layer monitoring SM are opened
The rate requirement of pin；When the speed of ODUflex is less than the minimum-rate for arranging, when passing through without packet
When GFP is mapped to ODUflex, generates GFP idle frames and be mapped to ODUflex, ODUflex is carried out
Rate pad, makes the speed of ODUflex be more than or equal to minimum-rate value.
Preferably, different ODUflex is multiplexed into same ODUk pipelines includes：Optical channel is net
The frame cutting of lotus layer OPUk is multiple logical channel units that length is fixed, and is compiled using logical channel unit
What number mark logical channel unit was carried is the data of which ODUflex；By logical channel unit by statistics
Multiplex technique, distribute according to need to need transmit data ODUflex, and on demand using OPU frames in patrol
Volume channel unit transmission ODUflex, OPU bandwidth have remaining in the case of, carried out using idle frame
Filling.
Preferably, ODUflex includes through the cross matrix of OTN：Directly will by packet switch kernel
The data flow of ODUflex swaps process as common packet data streams.
Present invention also offers a kind of statistic multiplexing optical transfer network device, including：Mapping Multiplexing module, is used for
In optical transfer network OTN, Packet Service is mapped to different flexible speed by Generic Framing Procedure GFP
Rate light data unit ODUflex, does not make when the pipeline speed of ODUflex is not below the minimum-rate for arranging
Rate pad, and the statistic multiplexing by optical transfer network OTN is carried out to ODUflex with the idle frame of GFP
Different ODUflex is multiplexed into same ODUk pipelines by technology, is accounted in all Packet Service bandwidth
When being discontented with whole ODUk pipelines, by idle IDLE of the pipeline speed of ODUk by Multiplexing Technology
Frame is filled, wherein, k=0,1,2,2e, 3,4, Cn, Cn represent 100G multiples pipeline speed
Rate；De-mapping module is exchanged, is carried out in the intermediate node for passing through for the ODUk to carrying ODUflex
Exchange is processed, and is sent to destination node, when the ODUk for carrying ODUflex is sent to destination node, will
ODUflex from ODUk demappings out, then by GFP by Packet Service demapping from ODUflex
Out.
Preferably, exchanging De-mapping module is used for：When the ODUflex for being mapped to same ODUk is same
Source chummage, the intermediate node passed through by ODUk directly exchange ODUk；When being mapped to same ODUk
ODUflex be homologous not chummage, the intermediate node passed through by ODUk, by from upstream node
ODUflex out, is made ODUflex through the cross matrix of OTN, is exchanged to not from ODUk demappings
Same Way out, in ODUflex after cross matrix, goes to next identical by intermediate node
The ODUflex of downstream node, by Multiplexing Technology, is mapped to one ODUk of identical.
Preferably, mapping Multiplexing module is further used for：One is arranged for carrying the ODUflex of Packet Service
Individual minimum-rate, minimum-rate disclosure satisfy that the channel layer monitoring PM of transmission ODUflex and the monitoring of section layer
The rate requirement of SM expenses；When the speed of ODUflex is less than the minimum-rate for arranging, when without data
When bag is mapped to ODUflex by GFP, generates GFP idle frames and be mapped to ODUflex, to ODUflex
Rate pad is carried out, makes the speed of ODUflex be more than or equal to minimum-rate value.
Preferably, mapping Multiplexing module is used for：The frame cutting of optical channel payload layer OPUk is fixed for length
Multiple logical channel units, and identify that logical channel unit carries using logical channel element number is which
The data of individual ODUflex；By logical channel unit by Multiplexing Technology, distribute according to need to needing to transmit
The ODUflex of data, and on demand using the logical channel unit transmission ODUflex in OPU frames, in OPU
Bandwidth have remaining in the case of, be filled using idle frame.
Preferably, exchanging De-mapping module is used for：By packet switch kernel directly by the data of ODUflex
Stream swaps process as common packet data streams.
The present invention has the beneficial effect that：
By introducing Multiplexing Technology, it is simply by MPLS-TP to solve POTN in prior art
It is superimposed upon to carry various packet traffics with OTN, the problem that equipment is realized and network management is complicated, by light
Transmission net transform the pipeline of full flexible as, can effectively carry the Packet Service of various rate-compatibles.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technology of the present invention
Means, and being practiced according to the content of description, and in order to allow above and other objects of the present invention,
Feature and advantage can become apparent, below especially exemplified by the specific embodiment of the present invention.
Description of the drawings
By reading the detailed description of hereafter preferred implementation, various other advantages and benefit are for ability
Domain those of ordinary skill will be clear from understanding.Accompanying drawing is only used for the purpose for illustrating preferred implementation, and simultaneously
It is not considered as limitation of the present invention.And in whole accompanying drawing, it is denoted by the same reference numerals identical
Part.In the accompanying drawings：
Fig. 1 is the flow chart of the statistic multiplexing optical transfer network method of the embodiment of the present invention；
Fig. 2 be the embodiment of the present invention carrying Packet Service ODUflex with carry constant bit-rate industry
The ODUflex/ODUj of business maps and is multiplexed into the schematic diagram of ODUk；
Fig. 3 is the Packet Service for transmitting homologous chummage by statistic multiplexing optical transfer network of the embodiment of the present invention
Schematic diagram；
Fig. 4 is the Packet Service for transmitting homologous not chummage by statistic multiplexing optical transfer network of the embodiment of the present invention
Schematic diagram；
Fig. 5 is the structural representation of the statistic multiplexing optical transfer network device of the embodiment of the present invention.
Specific embodiment
The exemplary embodiment of the disclosure is more fully described below with reference to accompanying drawings.Although show in accompanying drawing
The exemplary embodiment of the disclosure, it being understood, however, that may be realized in various forms the disclosure and should be by
Embodiments set forth here is limited.On the contrary, there is provided these embodiments are able to be best understood from this
Open, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.
Simply simply MPLS-TP and OTN is superimposed upon to carry to solve POTN in prior art
Various packet traffics, the problem that equipment is realized and network management is complicated, the invention provides a kind of statistic multiplexing
Optical transfer network method and device, below in conjunction with accompanying drawing and embodiment, is carried out further specifically to the present invention
Bright.It should be appreciated that specific embodiment described herein only limits this in order to explain the present invention, not
Bright.
Embodiment of the method
A kind of embodiments in accordance with the present invention, there is provided statistic multiplexing optical transfer network method, Fig. 1 are the present invention
The flow chart of the statistic multiplexing optical transfer network method of embodiment, as shown in figure 1, according to embodiments of the present invention
Statistic multiplexing optical transfer network method includes following process：
Step 101, in optical transfer network OTN, Packet Service is mapped by Generic Framing Procedure GFP
Different flexible rate light data unit ODUflex is arrived, and setting is not below in the pipeline speed of ODUflex
Do not use the idle frame of GFP that rate pad is carried out to ODUflex during minimum-rate, and pass through optical transfer network
Different ODUflex is multiplexed into same ODUk pipelines by the Multiplexing Technology of OTN, all
When Packet Service bandwidth accounts for discontented whole ODUk pipelines, the pipeline speed of ODUk is passed through statistic multiplexing
The idle IDLE frames of technology are filled, wherein, k=0,1,2,2e, 3,4, Cn, Cn represents 100G
The pipeline speed of multiple；
In a step 101, different ODUflex is multiplexed into same ODUk pipelines to specifically include：
It is multiple logical channel units that length is fixed by the frame cutting of optical channel payload layer OPUk, and uses logic
What channel unit number-mark logical channel unit was carried is the data of which ODUflex；By logical channel list
Unit is distributed according to need to the ODUflex for needing to transmit data, and on demand using OPU by Multiplexing Technology
In frame logical channel unit transmission ODUflex, OPU bandwidth have remaining in the case of, using sky
Not busy frame is filled.
It should be noted that ODUk (k=0,1,2,2e, 3,4, Cn) frame structure be 4 rows 3824
Array structure, is mainly made up of two parts：ODUk expenses and OPUk.
Additionally, in actual applications, can also be that the ODUflex for carrying Packet Service arranges a minimum
Speed, minimum-rate disclosure satisfy that the channel layer monitoring PM of transmission ODUflex and section layer monitoring SM expenses
Rate requirement；When the speed of ODUflex is less than the minimum-rate for arranging, when passing through without packet
When GFP is mapped to ODUflex, generates GFP idle frames and be mapped to ODUflex, ODUflex is carried out
Rate pad, makes the speed of ODUflex be more than or equal to minimum-rate value.
Step 102, the ODUk for carrying ODUflex swap process in the intermediate node for passing through, and pass
Destination node is sent to, when the ODUk for carrying ODUflex is sent to destination node, by ODUflex from ODUk
Out, then by Packet Service, from ODUflex, demapping is out by GFP for demapping.
In a step 102, the ODUk for carrying ODUflex swaps process in the intermediate node for passing through
Specifically include：When be mapped to same ODUk ODUflex be homologous chummage, ODUk pass through centre
Node directly exchanges ODUk；When be mapped to same ODUk ODUflex be homologous not chummage, ODUk
Through intermediate node, by the ODUflex from upstream node from ODUk demappings out, make ODUflex
Through the cross matrix of OTN, different Way outs are exchanged to, in ODUflex after cross matrix,
The ODUflex that next identical downstream node is gone to by intermediate node, by Multiplexing Technology, reflects
It is mapped to one ODUk of identical.
In the process above, ODUflex is specifically included through the cross matrix of OTN：By packet switch
The data flow of ODUflex is directly swapped process as common packet data streams by kernel.
Specifically, in embodiments of the present invention, Packet Service is mapped to different ODUflex by GFP,
ODUflex is without the need for carrying out rate pad by the idle IDLE frames of GFP；These ODUflex are again by system
Meter multiplexing OTN technology, is multiplexed into single ODUk pipelines；If all Packet Service bandwidth account for discontented whole
Individual ODUk pipelines, need to carry out rate pad by the IDLE frames of statistic multiplexing, and every ODUflex has
The OAM of oneself and protection mechanism, ODUflex can carry out flexible bandwidth rates adjustment, without the need for MPLS
Forwarding process and OAM and the protection of MPLS/MPLS-TP.
When be mapped to same ODUk (k=0,1,2,2e, 3, ODUflex 4) is homologous chummage, ODUk
The intermediate node for being passed through, without the need for out swapping these ODUflex from ODUk demappings, directly
Meet exchange ODUk.When the ODUflex for being mapped to same ODUk is homologous not chummage, ODUk passed through
The intermediate node that crosses, need by the ODUflex from upstream node from ODUk demappings out, these
Cross matrixes of the ODUflex through OTN, exchanges to different Way outs；ODUflex is through intersecting
After matrix, the ODUflex of intermediate node identical downstream node is mapped to identical by Multiplexing Technology
An ODUk.When the ODUflex of rate-compatible is through cross matrix, packet of the prior art is handed over
Changing kernel needs by OPF (OTN over Packet Fabric) functional device, to ODUk/ODUflex's
Data are cut into slices, and the frame of ODUk/ODUflex is sliced into the acceptable packet bag of packet switch kernel,
After packet switch kernel, these packet packages are dressed up an ODUk/ODUflex by OPF functional devices again
Frame.The technical scheme of the embodiment of the present invention need not be by the ODUflex of rate-compatible through OPF functional devices
Section and assembling, ODUflex data flows directly can be handed over by packet switch kernel as common stream of packets
Process is changed, the treatment effeciency of verification ODUflex in packet switch is improved.
When ODUflex is mapped to ODUk, system can be supplied to the service class of user according to operator
Agreement, arranges a maximum bandwidth value to this ODUflex, due to having used Multiplexing Technology to incite somebody to action
ODUflex is mapped to ODUk, and the bandwidth rates of these ODUflex are variable, when may be very long
Between, ODUflex does not carry some packet traffics, can so cause to pass through ODUflex without data
To carry；If the OAM of OTN to be reused and protection mechanism, then the trace monitor (Path of ODUflex
Monitor, PM) and section monitoring (Section Monitor, SM) expense allow for correctly from ODUflex
Source node be sent to destination node or be sent to source node from destination node.If ODUflex is in a period of time
Inside do not transmit data, these Overhead just cannot from the source node of ODUflex be sent to destination node or
Source node is sent to from destination node.Therefore, the embodiment of the present invention can carry packet traffic for concrete certain
ODUflex arranges a minimum-rate, and this minimum bandwidth allows for the SM for meeting transmission ODUflex
Rate requirement with PM expenses.When the speed of this ODUflex is less than the minimum-rate for arranging,
When ODUflex is mapped to without packet by GFP-F, it is necessary to generate GFP IDLE frames and be mapped to
ODUflex, is filled to ODUflex speed so that the speed of ODUflex can be more than or equal to set
Fixed minimum-rate value, ensure that SM and PM expenses can be transmitted with certain speed.
When ODUflex is mapped to same ODUk by statistic multiplexing, ODUk is not according still further to time slot pair
The bandwidth of ODUk is divided, and is ODUflex distribution bandwidths according to fixed Bandwidth Allocation Policy；And
It is multiple bags that the frame of OPUk is cut into length fixation, it is logical that such as OPU payloads are divided into 32 logics
Road unit, the logical channel unit have packet header.The label for introducing similar MPLS (can be described as logic to lead to
Number in road) expense, represent which low order ODUflex certain logical channel unit (packet bag) carries
Data.These bags desirably distribute to the ODUflex for needing to transmit data according to Multiplexing Technology.
Desirably using high-order OPU frames in bag transmitting the data flow of low order ODU/ODUflex.If OPU
Bandwidth cannot be used up, filled using IDLE data.The data of certain ODU/ODUflex are without the need for fixed
Ground occurs in every OPU frames.
Carry the ODUflex and the ODUflex/ODUj for carrying constant bit-rate business of Packet Service
ODUk (k can be mapped and are multiplexed into by single-stage>J), as shown in Figure 2.When carry rate-compatible point
When the ODUflex of group business is mapped to ODUk, without the need for the mapping of similar BMP, AMP, GMP etc.
ODUflex is directly mapped to ODUk by Multiplexing Technology by mode, and these ODUk can be further
Map and be multiplexed into ODUCn or directly transmitted by OTUk.Single-stage multiplexing is suitable for statistic multiplexing OTN
Individually networking.It is deployed in metropolitan area access and convergence etc., multiple service supporting set-off, mobile retransmission, domestic consumer
Flow.
When suitable statistic multiplexing OTN and existing OTN mixed networking or when docking, can be multiple using two grades
With mode, as shown in Figure 2.When the ODUflex of the Packet Service for carrying rate-compatible is mapped to ODUk
When, without the need for the mapping mode of similar BMP, AMP, GMP etc., directly that ODUflex is multiple by statistics
With technology-mapped to ODUk, these ODUi can be mapped by GMP and be multiplexed into higher ODUi (i>k)
Container.These ODUi can further be mapped and are multiplexed into ODUCn or directly be transmitted by OTUi.
Two grades of multiplexings can also allow statistic multiplexing OTN be deployed in metropolitan area and access and converge, multiple service supporting set-off,
Mobile retransmission, domestic consumer's flow, are docked with existing OTN when necessary.
When the ODUj that carry the business that speed is fixed is mapped to ODUk by Multiplexing Technology, need
Mapping point will be conciliate in mapping carries out the synchronization of speed, and speed passes through the GMP that can use for reference prior art
Speed in (Generic Mapping Procedure) or OPF (OTN over Packet Fabric) is same
Step technology.Also synchronization of rate can be carried out by FMP (Frame-based Mapping Procedure).
By means of the technical scheme of the embodiment of the present invention, Multiplexing Technology is introduced, optical transfer network is transform as
The pipeline of full flexible.Specifically, the embodiment of the present invention carries out distribution according to need using Multiplexing Technology, right
Need the business ability distribution bandwidth of transmission information, so that bandwidth can obtain using fullly, utilization rate
Height, pipeline are flexible and flexible.The business of arbitrarily bit rate may map to the pipe of statistic multiplexing OTN
In road, there is no bandwidth waste.Will be decoupling for the client traffic bandwidth granularity of OTN and OTN so that
The technology and standard evolution of OTN be no longer excessively limited to OTN client (mainly IEEE definition with
Too net) bandwidth.Statistic multiplexing OTN changes the method for salary distribution of ODUk bandwidth, works as low order
When ODUj/ODUflex is mapped to ODUk, it is achieved that the distribution according to need of bandwidth.
Hereinafter the above-mentioned technical proposal of the embodiment of the present invention is illustrated.
Below in conjunction with the accompanying drawings the enforcement of technical solution of the present invention is described in further detail.
Example one, carries Packet Service using statistic multiplexing OTN, such as, is carried by statistic multiplexing
Government and enterprises' net private line service, the speed of these business include 2Mbit/s, 100Mbit/s, 155Mbit/s,
1000Mbit/s etc., Fig. 3 are the scene of homologous chummage, and concrete steps include：
Step 11：Packet Service passes through GFP-F (Frame-mapped Generic Framing Procedure)
Encapsulation, is mapped to the ODUflex of OTN, when Packet Service is mapped to ODUflex by GFP-F,
Without the need for carrying out rate pad by GFP IDLE frames.
Step 12：Set of group business is mapped to different ODUflex by GFP-F respectively, these
ODUflex by Multiplexing Technology, be mapped to together same ODUk (k=0,1,2,2e, 3,4), than
ODUflex such as 50 20Mbit/s is mapped to same ODU0 together；Or 10 100Mbit/s
ODUflex be mapped to same ODU0 together.
Step 13：When the homologous chummages of the ODUflex of step 12, that is, source (such as the node A of Fig. 3)
When identical with place (such as the node C of Fig. 3), the intermediate node for being passed through is without the need for directly carrying out to ODUflex
Exchange, it is only necessary to which (exchange 4) i.e. can be with such as the section of Fig. 3 for k=0,1,2,2e, 3e to carry out ODUkODUk
Point B, as these ODUflex go to same destination, in node B, these ODUflex without the need for from
Out, ODUk directly can exchange to east orientation port to ODUk demappings from west to port.
Step 14：When the ODUk for carrying ODUflex is sent to destination node, after the node C of such as Fig. 3,
From ODUk demappings out, node C by GFP-F demappings, will be grouped industry to these ODUflex again
It is engaged in from ODUflex demappings out.
Example two, carries Packet Service using statistic multiplexing OTN, such as, is carried by statistic multiplexing
Government and enterprises' net private line service, the speed of these business include 2Mbit/s, 100Mbit/s, 155Mbit/s,
1000Mbit/s etc., Fig. 4 are the scene of homologous not chummage, and concrete steps include：
Step 21：Packet Service passes through GFP-F (Frame-mapped Generic Framing Procedure)
Encapsulation, is mapped to the ODUflex of OTN, when Packet Service is mapped to ODUflex by GFP-F,
Without the need for carrying out rate pad by GFP IDLE frames.
Step 22：Set of group business is mapped to different ODUflex by GFP-F respectively, these
ODUflex by Multiplexing Technology, be mapped to together same ODUk (k=0,1,2,2e, 3,4), than
ODUflex such as 50 20Mbit/s is mapped to same ODU0 together；Or 10 100Mbit/s
ODUflex be mapped to same ODU0 together.
Step 23：When the homologous not chummages of the ODUflex of step 22, that is, source node is identical (such as Fig. 4
Node A), but destination node difference (such as the node C and node D of Fig. 4) when, ODUk is passed through
Intermediate node, needs will be solved from ODUk from the ODUflex of upstream node (such as the node A of Fig. 4)
Map out, cross matrixes (such as the cross matrix of Fig. 4 node B) of these ODUflex through OTN,
Exchange to different Way outs；ODUflex after cross matrix, the intermediate node (node such as Fig. 4
B the ODUflex of identical downstream node) will be gone to by Multiplexing Technology, identical one is mapped to
ODUk.Such as one group ODUflex will go to identical downstream node C, then these ODUflex will reflect
It is mapped to same ODUk；Another group is gone to identical downstream node D, then these ODUflex will map
Arrive same ODUk.
Step 24：When carry ODUflex ODUk be sent to destination node (as Fig. 4 node C or
D), these ODUflex from ODUk demappings out, node C and node D are reflected by GFP-F solutions again
Penetrate, by Packet Service from ODUflex demappings out.
In sum, by introducing Multiplexing Technology, it is simply to solve POTN in prior art
MPLS-TP and OTN are superimposed upon to carry various packet traffics, equipment is realized complicated with network management
Problem, the pipeline for transforming optical transfer network as full flexible can effectively carry dividing for various rate-compatibles
Group business.
Device embodiment
A kind of embodiments in accordance with the present invention, there is provided statistic multiplexing optical transfer network device, Fig. 5 are the present invention
The structural representation of the statistic multiplexing optical transfer network device of embodiment, as shown in figure 5, according to present invention enforcement
The statistic multiplexing optical transfer network device of example includes：Mapping Multiplexing module 50, exchange De-mapping module 52, with
Under the modules of the embodiment of the present invention are described in detail.
Specifically, Multiplexing module 50 is mapped, in optical transfer network OTN, by Packet Service by logical
Different flexible rate light data unit ODUflex are mapped to framing procedure GFP, ODUflex's
Pipeline speed is not below not using the idle frame of GFP to carry out speed to ODUflex during the minimum-rate for arranging
Filling, and the Multiplexing Technology by optical transfer network OTN, different ODUflex are multiplexed into same
Individual ODUk pipelines, when all Packet Service bandwidth account for discontented whole ODUk pipelines, by ODUk's
Pipeline speed is filled by the idle IDLE frames of Multiplexing Technology, wherein, k=0,1,2,2e,
3rd, 4, Cn, Cn represent the pipeline speed of 100G multiples；
Mapping Multiplexing module 50 is further used for：One is arranged most for carrying the ODUflex of Packet Service
Little speed, minimum-rate disclosure satisfy that the channel layer monitoring PM of transmission ODUflex and section layer monitoring SM are opened
The rate requirement of pin；When the speed of ODUflex is less than the minimum-rate for arranging, when passing through without packet
When GFP is mapped to ODUflex, generates GFP idle frames and be mapped to ODUflex, ODUflex is carried out
Rate pad, makes the speed of ODUflex be more than or equal to minimum-rate value.
Mapping Multiplexing module 50 specifically for：The frame cutting of optical channel payload layer OPUk is fixed for length
Multiple logical channel units, and identify that logical channel unit carries using logical channel element number is which
The data of individual ODUflex；By logical channel unit by Multiplexing Technology, distribute according to need to needing to transmit
The ODUflex of data, and on demand using the logical channel unit transmission ODUflex in OPU frames, in OPU
Bandwidth have remaining in the case of, be filled using idle frame.
De-mapping module 52 is exchanged, is clicked through in the middle node for passing through for the ODUk to carrying ODUflex
Row exchange is processed, and is sent to destination node, when the ODUk for carrying ODUflex is sent to destination node,
By ODUflex from ODUk demappings out, then by Packet Service, solution from ODUflex is reflected by GFP
Shoot out.
Exchange De-mapping module 52 specifically for：When the ODUflex for being mapped to same ODUk is homologous
Chummage, the intermediate node passed through by ODUk directly exchange ODUk；When being mapped to same ODUk
ODUflex be homologous not chummage, the intermediate node passed through by ODUk, by from upstream node
ODUflex out, is made ODUflex through the cross matrix of OTN, is exchanged to not from ODUk demappings
Same Way out, in ODUflex after cross matrix, goes to next identical by intermediate node
The ODUflex of downstream node, by Multiplexing Technology, is mapped to one ODUk of identical.
Exchange De-mapping module 52 can pass through packet switch kernel directly by the data flow of ODUflex as
Common packet data streams swap process.
By introducing Multiplexing Technology, it is simply by MPLS-TP to solve POTN in prior art
It is superimposed upon to carry various packet traffics with OTN, the problem that equipment is realized and network management is complicated, by light
Transmission net transform the pipeline of full flexible as, can effectively carry the Packet Service of various rate-compatibles.
Obviously, those skilled in the art can carry out various changes and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these modification and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprising these changes and modification.
Algorithm and display be not intrinsic with any certain computer, virtual system or miscellaneous equipment provided herein
Related.Various general-purpose systems can also be used together based on teaching in this.As described above, structure
It is obvious to make the structure required by this kind of system.Additionally, the present invention is also not for any certain programmed
Language.It is understood that, it is possible to use various programming languages realize the content of invention described herein, and
The above description done by language-specific is the preferred forms in order to disclose the present invention.
In description mentioned herein, a large amount of details are illustrated.It is to be appreciated, however, that this
Bright embodiment can be put into practice in the case where not having these details.In some instances, not in detail
Known method, structure and technology are shown, so as not to obscure the understanding of this description.
Similarly, it will be appreciated that in order to simplify the disclosure helping understand one in each inventive aspect or
Multiple, in description above to the exemplary embodiment of the present invention, each feature of the present invention is sometimes by one
Rise and be grouped in single embodiment, figure or descriptions thereof.However, should not be by the method for the disclosure
It is construed to reflect following intention：I.e. the present invention for required protection is required than institute in each claim clearly
The more features of the feature of record.More precisely, as the following claims reflect, sending out
Bright aspect is all features less than single embodiment disclosed above.Therefore, it then follows specific embodiment
Claims be thus expressly incorporated in the specific embodiment, wherein each claim conduct itself
The separate embodiments of the present invention.
Those skilled in the art be appreciated that can to embodiment in client in module carry out from
Adaptively change and they are arranged in one or more clients different from the embodiment.Can be with
The block combiner in embodiment into a module, and multiple submodule or son can be divided in addition
Unit or sub-component.Except at least some in such feature and/or process or unit excludes each other it
Outward, any combinations can be adopted to public in this specification (including adjoint claim, summary and accompanying drawing)
The all features that opens and all processes or unit of so disclosed any method or client carry out group
Close.Unless expressly stated otherwise, public in this specification (including adjoint claim, summary and accompanying drawing)
Each feature that opens can be replaced by the alternative features for providing identical, equivalent or similar purpose.
Although additionally, it will be appreciated by those of skill in the art that some embodiments described herein include other
Some included features rather than further feature in embodiment, but the group of the feature of different embodiments is desirable
Taste and is within the scope of the present invention and is formed different embodiments.For example, in following claim
In book, embodiment required for protection one of arbitrarily can in any combination mode using.
The all parts embodiment of the present invention can be realized with hardware, or with one or more processor
The software module of upper operation is realized, or is realized with combinations thereof.It will be understood by those of skill in the art that
Can be realized using microprocessor or digital signal processor (DSP) in practice according to of the invention real
Apply some or all functions of some or all parts in the client for being loaded with sequence network address of example.
The present invention be also implemented as execute method as described herein some or all equipment or
Person's program of device (for example, computer program and computer program).Such journey for realizing the present invention
Sequence can be stored on a computer-readable medium, or can have the form of one or more signal.This
The signal of sample can be downloaded from internet website and be obtained, or provide on carrier signal, or with any
Other forms are provided.
It should be noted that above-described embodiment the present invention will be described rather than limits the invention, and
And those skilled in the art can design replacement enforcement without departing from the scope of the appended claims
Example.In the claims, any reference markss being located between bracket should not be configured to claim
Limit.Word "comprising" does not exclude the presence of element not listed in the claims or step.Before being located at element
Word "a" or "an" do not exclude the presence of multiple such elements.If the present invention can be by means of including
The hardware of dry different elements and realized by means of properly programmed computer.If listing equipment for drying
In unit claim, several in these devices can be embodied by same hardware branch.
The use of word first, second, and third does not indicate that any order.These words can be explained and be run after fame
Claim.
Claims (10)
1. a kind of statistic multiplexing optical transfer network method, it is characterised in that include：
In optical transfer network OTN, Packet Service is mapped to different spirits by Generic Framing Procedure GFP
Speed light data unit ODUflex living, in the minimum speed that the pipeline speed of the ODUflex is not below arranging
Do not use the idle frame of the GFP that rate pad is carried out to ODUflex during rate, and pass through optical transfer network OTN
Multiplexing Technology, the different ODUflex is multiplexed into same ODUk pipelines, all
When Packet Service bandwidth accounts for discontented whole ODUk pipelines, the pipeline speed of ODUk is passed through statistic multiplexing
The idle IDLE frames of technology are filled, wherein, k=0,1,2,2e, 3,4, Cn, Cn represents 100G
The pipeline speed of multiple；
The ODUk for carrying the ODUflex swaps process in the intermediate node for passing through, and is sent to
Destination node, when the ODUk for carrying the ODUflex is sent to destination node, by the ODUflex from
Out, then by Packet Service, from ODUflex, demapping is out by GFP for ODUk demappings.
2. the method for claim 1, it is characterised in that carry the ODUk of the ODUflex
Process is swapped in the intermediate node for passing through includes：
When the ODUflex for being mapped to same ODUk is homologous chummage, the centre of the ODUk processes
Node directly exchanges ODUk；
When the ODUflex for being mapped to same ODUk is homologous not chummage, during the ODUk is passed through
Intermediate node, by the ODUflex from upstream node from ODUk demappings out, make the ODUflex
Through the cross matrix of OTN, different Way outs are exchanged to, in the ODUflex through intersecting square
After battle array, the ODUflex that goes to next identical downstream node by the intermediate node is multiple by statistics
With technology, one ODUk of identical is mapped to.
3. the method for claim 1, it is characterised in that methods described is further included：
One minimum-rate is set for carrying the ODUflex of Packet Service, the minimum-rate disclosure satisfy that
The channel layer monitoring PM and section layer for transmitting the ODUflex monitors the rate requirement of SM expenses；
When the speed of the ODUflex is less than the minimum-rate for arranging, when passing through without packet
When GFP is mapped to ODUflex, generates GFP idle frames and be mapped to the ODUflex, to the ODUflex
Rate pad is carried out, makes the speed of the ODUflex be more than or equal to the minimum-rate value.
4. the method for claim 1, it is characterised in that by the different ODUflex multiplexings
Include to same ODUk pipelines：
It is multiple logical channel units that length is fixed by the frame cutting of optical channel payload layer OPUk, and uses
Logical channel element number identifies the data of the ODUflex that the logical channel unit is carried；
By the logical channel unit by Multiplexing Technology, distribute according to need to needing to transmit data
ODUflex, and the ODUflex is transmitted using the logical channel unit in OPU frames on demand, described
The bandwidth of OPU have remaining in the case of, be filled using idle frame.
5. method as claimed in claim 2, it is characterised in that friendships of the ODUflex through OTN
Fork matrix includes：By packet switch kernel directly by the data flow of the ODUflex as common packet
Data flow swaps process.
6. a kind of statistic multiplexing optical transfer network device, it is characterised in that
Mapping Multiplexing module, for, in optical transfer network OTN, passing through Generic Framing Procedure by Packet Service
GFP is mapped to different flexible rate light data unit ODUflex, in the pipeline speed of the ODUflex
It is not below not using the idle frame of the GFP to carry out rate pad to ODUflex during the minimum-rate for arranging,
And the Multiplexing Technology by optical transfer network OTN, the different ODUflex is multiplexed into same
ODUk pipelines, when all Packet Service bandwidth account for discontented whole ODUk pipelines, by the pipeline of ODUk
Speed is filled by the idle IDLE frames of Multiplexing Technology, wherein, k=0,1,2,2e, 3,4,
Cn, Cn represent the pipeline speed of 100G multiples；
De-mapping module is exchanged, for the ODUk to carrying the ODUflex in the intermediate node for passing through
Process is swapped, and is sent to destination node, when the ODUk for carrying the ODUflex is sent to Su Jie
Point when, by the ODUflex from ODUk demappings out, then by GFP by Packet Service from
In ODUflex, demapping is out.
7. device as claimed in claim 6, it is characterised in that exchange De-mapping module and be additionally operable to：
When the ODUflex for being mapped to same ODUk is homologous chummage, passed through by the ODUk
Intermediate node directly exchanges ODUk；
When the ODUflex for being mapped to same ODUk is homologous not chummage, passed through by the ODUk
Intermediate node, by the ODUflex from upstream node from ODUk demappings out, make the ODUflex
Through the cross matrix of OTN, different Way outs are exchanged to, in the ODUflex through intersecting square
After battle array, the ODUflex that goes to next identical downstream node by the intermediate node is multiple by statistics
With technology, one ODUk of identical is mapped to.
8. device as claimed in claim 6, it is characterised in that the mapping Multiplexing module is further used
In：
One minimum-rate is set for carrying the ODUflex of Packet Service, the minimum-rate disclosure satisfy that
The channel layer monitoring PM and section layer for transmitting the ODUflex monitors the rate requirement of SM expenses；
When the speed of the ODUflex is less than the minimum-rate for arranging, when passing through without packet
When GFP is mapped to ODUflex, generates GFP idle frames and be mapped to the ODUflex, to the ODUflex
Rate pad is carried out, makes the speed of the ODUflex be more than or equal to the minimum-rate value.
9. device as claimed in claim 6, it is characterised in that the mapping Multiplexing module is additionally operable to：
It is multiple logical channel units that length is fixed by the frame cutting of optical channel payload layer OPUk, and uses
What logical channel element number identified the logical channel unit carrying is the data of which ODUflex；
By the logical channel unit by Multiplexing Technology, distribute according to need to needing to transmit data
ODUflex, and the ODUflex is transmitted using the logical channel unit in OPU frames on demand, described
The bandwidth of OPU have remaining in the case of, be filled using idle frame.
10. device as claimed in claim 7, it is characterised in that exchange De-mapping module and be additionally operable to：Logical
Cross packet switch kernel directly to hand over the data flow of the ODUflex as common packet data streams
Change process.
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| CN201510557836.6A CN106506110B (en) | 2015-09-06 | 2015-09-06 | Statistical multiplexing optical transport network method and device |
| PCT/CN2016/082260 WO2017036178A1 (en) | 2015-09-06 | 2016-05-16 | Method and device for statistically multiplexing optical transport network |
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| CN201510557836.6A CN106506110B (en) | 2015-09-06 | 2015-09-06 | Statistical multiplexing optical transport network method and device |
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| Publication number | Publication date |
|---|---|
| WO2017036178A1 (en) | 2017-03-09 |
| CN106506110B (en) | 2020-05-29 |
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