CN101729939B - Method and system for distributing passive optical network bandwidth - Google Patents
Method and system for distributing passive optical network bandwidth Download PDFInfo
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- CN101729939B CN101729939B CN 200810217161 CN200810217161A CN101729939B CN 101729939 B CN101729939 B CN 101729939B CN 200810217161 CN200810217161 CN 200810217161 CN 200810217161 A CN200810217161 A CN 200810217161A CN 101729939 B CN101729939 B CN 101729939B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04Q11/00—Selecting arrangements for multiplex systems
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Abstract
The invention provides a method and a system for distributing passive optical network bandwidth. The method comprises the following steps: when an optical line terminal distributes uplink bandwidth to an optical network unit, uplink bandwidth distributing information carries a distribution type mark to indicate the type of the bandwidth distributed to the optical network unit; and the optical network unit maintains and uses the corresponding uplink bandwidth according to the distribution type mark after receiving the bandwidth distributing information. In the invention, for bandwidth using a fixed bandwidth distribution type, new bandwidth distribution is carried out only when a change is required after the T-CONT relevant bandwidth is distributed, thereby lessening the load for OLT to distribute the uplink bandwidth and reducing occupation to the downlink bandwidth.
Description
Technical field
The present invention relates to EPON (Passive Optical Network is called for short PON) communication technical field, relate in particular to a kind of EPON bandwidth allocation methods and system.
Background technology
The PON system is made up of OLT (Optical Line Terminal, optical line terminal), ONU (OpticalNetwork Unit, optical network unit) and ODN (Optical Distribution Network, optical distribution network) usually.ODN is generally and a little arrives multipoint configuration, and an OLT connects a plurality of ONU through ODN.As ITU-T G.984 GPON (Gigabit Passive Optical Network) system, FSAN of series based on NG-PON (PON of future generation) system of GPON etc.
Based on TDMA (Time Division Multiplex Access; The time division multiplexing access) in the PON system (like GPON, NG-PON system); ONU need could send data under the mandate at OLT at up direction; OLT is that ONU distributes upstream bandwidth through DBA (Dynamic Bandwidth Assignment, Dynamic Bandwidth Allocation) function.The DBA function is the cycle with the time T, and each T is divided into the some time interval and these time intervals are distributed to ONU, and ONU sends data at up direction in designated time intervals.
The descending GTC of GPON system (GPON Transmission Convergence abbreviates the GPON transmission convergence layer as) frame structure and DBA form are as shown in Figure 1, and descending GTC frame is made up of frame head PCBd and payload; DBA form US BWmap in the descending GTC frame frame head is the upstream bandwidth distribution content, comprises N part upstream bandwidth, and every part of upstream bandwidth comprises Alloc-ID, Flags, SStart, SStop, CRC territory; Wherein Alloc-ID represents the T-CONT (transmission container) among the ONU, and upstream bandwidth distribution is used to T-CONT, and Flags representes some attributes relevant with upstream bandwidth; This territory 11-7 bit uses; The 6-0 bit is left in the future and uses, and SStart is the zero-time of upstream bandwidth, and SStop is the concluding time of upstream bandwidth; CRC is a CRC, is used to protect the correct transmission of upstream bandwidth content.
The T cycle in the GPON system is 125 microseconds, when last behavior 1.24416Gbit/s, can transmit 19440 bytes in each cycle, when last behavior 2.48832Gbit/s, can transmit 38880 bytes in each cycle.In the DBA of Fig. 1 form byte allocation; Take 8 bytes altogether with a relevant upstream bandwidth of T-CONT; To support 4 T-CONT to calculate than 1:64, each ONU along separate routes; DBA expense in descending GTC frame is 64 * 4 * 8=2048 byte, takies descending GTC frame overhead and can reach 2048/38880=5.27% (during 2.48832Gbit/s) even 2048/19440=10.27% (during 1.24416Gbit/s).In research based on the PON of future generation of GPON, possibly need to strengthen the value in some territory in the DBA form, like the span that enlarges Alloc-ID to support more T-CONT; PON of future generation based on GPON possibly have higher upstream rate in addition, with upstream rate 9,95328Gbit/s; Along separate routes than 1:128; Each ONU supports 8 T-CONT to calculate, and the DBA expense in descending GTC frame is 128 * 8 * 8=8192 byte, and the expense ratio is similarly 5.27%.Thereby if can effectively reduce the utilance that utilance that the DBA expense will help to improve descending GTC frame improves downlink bandwidth.
In addition; Each cycle of OLT all will be redistributed upstream bandwidth in the GPON system; This is undoubtedly a heavier burden concerning OLT; Especially in NG-PON system,, will increase the weight of the burden of the upstream bandwidth distribution work of OLT undoubtedly more along with the increase of upstream rate, the increase of T-CONT sum based on GPON.
Consider QoS, the T-CONT among the GPON ONU comprises 5 types, and Class1, type 2, type 3, type 4, type 5 can be divided into big type from the bandwidth use angle:
1) fixed-bandwidth T-CONT always is assigned to the upstream bandwidth of regular length, and is irrelevant with network state, other T-CONT bandwidth situation.
2) dynamic bandwidth T-CONT, each period allocated is to some but unfixed upstream bandwidth, and is relevant with network state, other T-CONT bandwidth situation.
In addition, the T-CONT of type 5 is more special, can be configured to Class1,2,3,4 T-CONT.
For fixed-bandwidth T-CONT; Its bandwidth length that is assigned to is fixed; But in existing GPON standard OLT still each cycle all to redistribute upstream bandwidth to it, this causes unnecessary duplicate allocation undoubtedly, thereby has wasted downlink bandwidth to a certain extent.
Therefore, see that GPON system and even NG-PON system all need provide a kind of more effectively upstream bandwidth distribution mechanism from DBA expense, OLT processing burden, fixed-bandwidth duplicate allocation equal angles.
Summary of the invention
Technical problem to be solved by this invention is a kind of EPON bandwidth allocation methods and system to be provided, to reduce the duplicate allocation of upstream bandwidth, the burden of reduction OLT allocated bandwidth work.
According to an aspect of the present invention; A kind of EPON bandwidth allocation methods is provided; This method comprises: when optical line terminal distributes upstream bandwidth to optical network unit, in upstream bandwidth distribution information, carry the allocation classes phenotypic marker, in order to be designated as the bandwidth types that optical network unit distributes; After optical network unit receives bandwidth allocation information, safeguard and use corresponding upstream bandwidth according to the allocation classes phenotypic marker.
Wherein, the allocated bandwidth type of allocation classes phenotypic marker indication comprises: fixed-bandwidth distributes type, and the Dynamic Bandwidth Allocation type.
Wherein, optical line terminal distributes the same band of type in consecutive periods, only to distribute once to fixed-bandwidth; Optical network unit receives fixed-bandwidth and distributes under the situation of allocation classes phenotypic marker of type, bandwidth allocation information is stored and permanent this upstream bandwidth that uses for a long time, until the new bandwidth allocation information of receiving that optical line terminal is sent.
Wherein, optical network unit receives under the situation of allocation classes phenotypic marker of Dynamic Bandwidth Allocation type, after distributing the uplink burst bag through this upstream bandwidth, deletes bandwidth allocation information immediately, is redistributed the upstream bandwidth of next cycle by optical line terminal.
Wherein, Optical line terminal is regained the upstream bandwidth that original fixed-bandwidth distributes type through sending new bandwidth allocation information; New bandwidth allocation information comprises: carry the bandwidth allocation information of new allocated bandwidth type, new amount of bandwidth and/or new starting and ending time, perhaps zero-time equals the special bandwidth allocation information of concluding time.
Wherein, optical line terminal is confirmed transmission container is distributed fixed-bandwidth or dynamic bandwidth according to the transmission container type of optical network unit.
Wherein, optical network unit restart or optical line terminal and the out of touch situation of optical network unit under, optical line terminal is regained original upstream bandwidth.
Wherein, the allocation classes phenotypic marker takies 1 bit.
According to another aspect of the present invention; A kind of EPON allocated bandwidth system is provided; Comprise optical line terminal and optical network unit, this optical line terminal is used for distributing upstream bandwidth to optical network unit, and in upstream bandwidth distribution information, carries the allocation classes phenotypic marker; Wherein, the allocation classes phenotypic marker is in order to be designated as the bandwidth types that optical network unit distributes; This optical network unit is used for safeguarding and use corresponding upstream bandwidth according to the allocation classes phenotypic marker.
Wherein, optical line terminal specifically comprises:
The type identification unit is used for confirming transmission container is distributed fixed-bandwidth or dynamic bandwidth according to the transmission container type of optical network unit, and corresponding allocation classes phenotypic marker is set in bandwidth allocation information;
Transmitting element is used for the bandwidth allocation information of carrying the allocation classes phenotypic marker is sent to optical network unit;
Analytic unit is used for according to allocation classes phenotypic marker or allocation classes phenotypic marker and has or not new bandwidth allocation information, determines whether the time interval of sending next bandwidth allocation information and sending next bandwidth allocation information.
Wherein, optical network unit specifically comprises:
Receiving element is used to receive bandwidth allocation information, and extracts allocation classes phenotypic marker wherein;
The bandwidth maintenance unit is used for that corresponding transmission container is carried out corresponding bandwidth allocation information storage and upstream bandwidth according to the allocation classes phenotypic marker and uses.
Above-mentioned analytic unit distributes under the situation of dynamic bandwidth in the indication of allocation classes phenotypic marker, and instruction sending unit sends a bandwidth allocation information in each cycle; And distribute fixed-bandwidth and exist under the situation of new bandwidth allocation information in allocation classes phenotypic marker indication, instruction sending unit sends new bandwidth allocation information immediately.
Above-mentioned bandwidth maintenance unit distributes under the situation of dynamic bandwidth in the indication of allocation classes phenotypic marker, after distributing the uplink burst bag through this upstream bandwidth, deletes bandwidth allocation information immediately; And under the situation of allocation classes phenotypic marker indication distribution fixed-bandwidth, bandwidth allocation information is stored and permanent this upstream bandwidth that uses for a long time, until the new bandwidth allocation information of receiving that optical line terminal is sent.
Wherein, new bandwidth allocation information comprises: carry the bandwidth allocation information of new allocated bandwidth type, new amount of bandwidth and/or new starting and ending time, perhaps zero-time equals the special bandwidth allocation information of concluding time.
The present invention has carried the allocation classes phenotypic marker in the upstream bandwidth distribution information that is assigned with; To using the fixed-bandwidth bandwidth distribution type; Can just carry out new allocated bandwidth when needing to change so that the bandwidth of relevant T-CONT has only after being assigned with; Reduced the burden that OLT distributes upstream bandwidth, reduced taking downlink bandwidth.
Description of drawings
Fig. 1 is the sketch map of the DBA form of GPON system in the prior art;
Fig. 2 is the flow chart of the inventive method embodiment;
Fig. 3 is the structural representation of system embodiment of the present invention;
Fig. 4 is the allocated bandwidth sketch map of the embodiment of the invention.
Embodiment
Below will combine accompanying drawing that embodiments of the invention are elaborated.
The present invention relates to the frame head part of descending GTC frame, and the DBA form US BWmap in the descending GTC frame frame head.
Method embodiment
A kind of EPON bandwidth allocation methods of the present invention, the embodiment flow chart is referring to shown in Figure 2.This method comprises:
When step S202, OLT distribute upstream bandwidth to ONU, in upstream bandwidth distribution information, carry the allocation classes phenotypic marker, in order to be designated as the bandwidth types that ONU distributes.
When OLT distributes upstream bandwidth to ONU; For relevant upstream bandwidth increases an allocation classes phenotypic marker in the DBA form; Be used in reference to the wide distribution type of oolemma, the indicated allocated bandwidth type of this allocation classes phenotypic marker comprises: fixed-bandwidth distributes type and Dynamic Bandwidth Allocation type.
1) fixed-bandwidth distributes type: for the bandwidth of the type, OLT is in case incite somebody to action no longer duplicate allocation after distributing.If revise the fixed-bandwidth bandwidth distribution type, can realize revising former bandwidth automatic drawing back through sending new bandwidth allocation information; This new bandwidth allocation information can also be that the bandwidth allocation information that a special zero-time equals the concluding time is used for regaining the fixed-bandwidth bandwidth distribution type.If ONU is restarted or OLT and ONU are out of touch, then OLT will regain the fixed-bandwidth bandwidth distribution type of being correlated with.
2) Dynamic Bandwidth Allocation type: for the bandwidth of Dynamic Bandwidth Allocation type, each cycle of OLT all will be redistributed.
OLT confirms each T-CONT is distributed fixed-bandwidth or dynamic bandwidth according to the T-CONT type of ONU.Table 1 is depicted as the relation between T-CONT type and the allocated bandwidth type, and dissimilar T-CONT can accept dissimilar allocated bandwidth.
Relation between table 1 T-CONT type and the allocated bandwidth type
In the table 1; Class1 T-CONT uses fixed-bandwidth; Only support the fixed-bandwidth bandwidth distribution type, OLT distributes after fixed-bandwidth bandwidth distribution type no longer duplicate allocation to Class1 T-CONT, revises the bandwidth of Class1 T-CONT certainly if desired; Can realize through distributing the fixed-bandwidth bandwidth distribution type once more, also can cancel the bandwidth of Class1 T-CONT through special bandwidth that the concluding time equates with zero-time is set.
Dynamic change can take place in the amount of bandwidth that type 2-4 T-CONT uses, and therefore can support the bandwidth of fixed-bandwidth bandwidth distribution type and Dynamic Bandwidth Allocation type.For type 2-4T-CONT; The combination of bandwidth that can be through fixed-bandwidth bandwidth distribution type and Dynamic Bandwidth Allocation type realizes utilized bandwidth in the certain hour scope; Promptly distribute a fixed-bandwidth to distribute the type bandwidth earlier, the bandwidth of a Dynamic Bandwidth Allocation type of reallocation after a period of time.
Type 5 T-CONT only support the fixed-bandwidth bandwidth distribution type when being configured to Class1, support the bandwidth of fixed-bandwidth bandwidth distribution type and Dynamic Bandwidth Allocation type when being configured to type 2 or type 3 or type 4.
Correspondingly OLT should keep following the tracks of the type of the bandwidth that is assigned with; Should be able to distinguish which bandwidth is that fixed-bandwidth distributes type; Which bandwidth is the Dynamic Bandwidth Allocation type; Simultaneously OLT also should be able to provide a bandwidth allocation methods efficiently, as the fixed-bandwidth bandwidth distribution type try one's best continuous dispensing in the foremost of total bandwidth, keep watch on the withdrawal etc. that fixed-bandwidth distributes the type bandwidth at any time, effectively to prevent the generation of bandwidth fragmentation; If produce abundant bandwidth fragmentation, then need regain correlation bandwidth and redistribute.
Step S204 after ONU receives bandwidth allocation information, safeguards and uses corresponding upstream bandwidth according to the allocation classes phenotypic marker.
Correspondingly, ONU need safeguard the upstream bandwidth of each T-CONT in this locality, and the upstream bandwidth that T-CONT is relevant was stored according to the time started.For the bandwidth of Dynamic Bandwidth Allocation type, ONU deletes bandwidth allocation information immediately after distributing the uplink burst bag through this upstream bandwidth.For the fixed-bandwidth bandwidth distribution type, this bandwidth allocation information will be stored by ONU for a long time, and ONU uses this bandwidth always as the upstream bandwidth of relevant T-CONT, up to receiving that new bandwidth allocation information just revises.
This new bandwidth allocation information comprises that the big or small or initial concluding time, the fixed-bandwidth distribution type that change fixed-bandwidth and distribute the type bandwidth change the Dynamic Bandwidth Allocation type into, the withdrawal fixed-bandwidth distributes type bandwidth (equating with zero-time through the concluding time is set) equiband assignment information.Wherein for regaining the special bandwidth allocation information that fixed-bandwidth distributes the type bandwidth to use, then require its initial concluding time with originally distribute the zero-time of bandwidth or concluding time to equate.When a T-CONT supports a plurality of upstream bandwidth, need there be one to distribute the zero-time of bandwidth or concluding time to equate in the zero-time that is comprised in the new bandwidth allocation information and concluding time with original.
In the above method, the allocation classes phenotypic marker can be designed to take 1 bit, representes with 0 or 1.
System embodiment
A kind of EPON allocated bandwidth of the present invention system, the structural representation of its system embodiment is as shown in Figure 3.
Referring to Fig. 3; System of the present invention comprises OLT30 and ONU31; OLT30 is used for distributing upstream bandwidth to ONU31, and in upstream bandwidth distribution information, carries the allocation classes phenotypic marker, promptly in the DBA form, increases an allocation classes phenotypic marker; Wherein, the allocation classes phenotypic marker is in order to be designated as the bandwidth types that ONU31 distributes; ONU31 is used for safeguarding and use corresponding upstream bandwidth according to the allocation classes phenotypic marker.
Wherein, OLT30 specifically comprises:
Type identification unit 301 is used for confirming T-CONT is distributed fixed-bandwidth or dynamic bandwidth according to the T-CONT type of ONU31, and corresponding allocation classes phenotypic marker is set in bandwidth allocation information;
Transmitting element 302 is used for the bandwidth allocation information of carrying the allocation classes phenotypic marker is sent to ONU31;
Wherein, ONU31 specifically comprises:
Receiving element 311 is used to receive bandwidth allocation information, and extracts allocation classes phenotypic marker wherein;
Bandwidth maintenance unit 312 is used for that corresponding T-CONT is carried out corresponding bandwidth allocation information storage and upstream bandwidth according to the allocation classes phenotypic marker and uses.
Bandwidth maintenance unit 312 distributes under the situation of dynamic bandwidth in the indication of allocation classes phenotypic marker, after distributing the uplink burst bag through this upstream bandwidth, deletes bandwidth allocation information immediately; And under the situation of allocation classes phenotypic marker indication distribution fixed-bandwidth, bandwidth allocation information is stored and permanent this upstream bandwidth that uses for a long time, until the new bandwidth allocation information of receiving that OLT30 sends.
Wherein, new bandwidth allocation information comprises: the bandwidth allocation information of carrying new allocated bandwidth type, new amount of bandwidth and/or new starting and ending time; Perhaps zero-time equals the special bandwidth allocation information of concluding time, is used for regaining original upstream bandwidth by OLT30.Wherein for regaining the special bandwidth allocation information that fixed-bandwidth distributes the type bandwidth to use, then require its initial concluding time with originally distribute the zero-time of bandwidth or concluding time to equate.When a T-CONT supports a plurality of upstream bandwidth, need there be one to distribute the zero-time of bandwidth or concluding time to equate in the zero-time that is comprised in the new bandwidth allocation information and concluding time with original.
With existing GPON system is example.
The upstream bandwidth distribution form of GPON system is as shown in Figure 1, and wherein the 6-0 bit in Flags territory is for keeping the territory, and the bit 6 that present embodiment utilizes this reservations territory is as distributing types, and the bit 6 in Flags territory is designed as follows:
1: fixed-bandwidth distributes type;
0: the Dynamic Bandwidth Allocation type.
An allocated bandwidth example is as shown in Figure 4, and its bend piece is represented the fixed-bandwidth bandwidth distribution type, and grid block is represented the bandwidth of Dynamic Bandwidth Allocation type, and the vertical line piece is represented to need not to distribute and the bandwidth that continues to use.First row are exemplified as fixed-bandwidth T-CONT; Be assigned to the fixed-bandwidth bandwidth distribution type of 10KB in the period 1; Do not receive new allocated bandwidth second round and continue to use the fixed-bandwidth bandwidth distribution type of 10KB; Period 3 is received new fixed-bandwidth bandwidth distribution type and the bandwidth of using is replaced with 15KB that the four-the nine follow-up cycle does not receive new allocated bandwidth and continues to use fixed-bandwidth to distribute the 15KB of type.Secondary series is exemplified as dynamic bandwidth T-CONT; Receive in the period 1 11KB the Dynamic Bandwidth Allocation type bandwidth and use one-period; Receive second round 12KB the Dynamic Bandwidth Allocation type bandwidth and use one-period; Period 3 receive 5KB the Dynamic Bandwidth Allocation type bandwidth and use one-period; Period 4 receive 11KB the Dynamic Bandwidth Allocation type bandwidth and use one-period, the period 5 is received the fixed-bandwidth bandwidth distribution type of 11KB, the six-the eight cycle did not receive new allocated bandwidth and continued to use fixed-bandwidth bandwidth distribution type 11KB; The 9th cycle received new Dynamic Bandwidth Allocation type bandwidth 5KB and used one-period, and simultaneously fixed-bandwidth bandwidth distribution type before cancelled.
In sum; The present invention has carried the allocation classes phenotypic marker in the upstream bandwidth distribution information that is assigned with; To using the fixed-bandwidth bandwidth distribution type; Can just carry out new allocated bandwidth when needing to change so that the bandwidth of relevant T-CONT has only after being assigned with, thereby reduce the duplicate allocation of upstream bandwidth, reduce the burden that OLT distributes upstream bandwidth; Quantity forwarded through reducing US Bwmap has reduced taking downlink bandwidth.
Obviously; Those skilled in the art should be understood that; Above-mentioned each module of the present invention or each step can realize with the executable program code of calculation element, thereby, can they be stored in the storage device and carry out by calculation element; Perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an EPON bandwidth allocation methods is characterized in that, said method comprises:
When optical line terminal distributes upstream bandwidth to optical network unit; In upstream bandwidth distribution information, carry the allocation classes phenotypic marker; In order to be designated as the bandwidth types that said optical network unit distributes; Wherein, the allocated bandwidth type of said allocation classes phenotypic marker indication comprises: fixed-bandwidth distributes type, and the Dynamic Bandwidth Allocation type;
After said optical network unit receives said bandwidth allocation information, safeguard and use corresponding upstream bandwidth according to said allocation classes phenotypic marker;
Wherein, said optical line terminal distributes the same band of type in consecutive periods, only to distribute once to said fixed-bandwidth; Said optical network unit receives said fixed-bandwidth and distributes under the situation of allocation classes phenotypic marker of type; Said bandwidth allocation information is stored and the said upstream bandwidth of permanent use for a long time, until the new bandwidth allocation information of receiving that said optical line terminal is sent.
2. EPON bandwidth allocation methods according to claim 1; It is characterized in that; Said optical network unit receives under the situation of allocation classes phenotypic marker of said Dynamic Bandwidth Allocation type; After distributing the uplink burst bag, delete said bandwidth allocation information immediately, redistribute the upstream bandwidth of next cycle by said optical line terminal through said upstream bandwidth.
3. EPON bandwidth allocation methods according to claim 1; It is characterized in that; Said optical line terminal is regained the upstream bandwidth that original fixed-bandwidth distributes type through sending new bandwidth allocation information; Said new bandwidth allocation information comprises: carry the bandwidth allocation information of new allocated bandwidth type, new amount of bandwidth and/or new starting and ending time, perhaps zero-time equals the special bandwidth allocation information of concluding time.
4. according to claim 2 or 3 described EPON bandwidth allocation methods, it is characterized in that said optical line terminal is confirmed said transmission container is distributed fixed-bandwidth or dynamic bandwidth according to the transmission container type of said optical network unit.
5. according to claim 1 or 3 described EPON bandwidth allocation methods; It is characterized in that; Said optical network unit restart or said optical line terminal and the out of touch situation of said optical network unit under, said optical line terminal is regained original upstream bandwidth.
6. EPON bandwidth allocation methods according to claim 1 is characterized in that, said allocation classes phenotypic marker takies 1 bit.
7. an EPON allocated bandwidth system comprises optical line terminal and optical network unit, it is characterized in that,
Said optical line terminal is used for distributing upstream bandwidth to said optical network unit, and in upstream bandwidth distribution information, carries the allocation classes phenotypic marker, and wherein, said allocation classes phenotypic marker is in order to be designated as the bandwidth types that said optical network unit distributes;
Said optical network unit is used for safeguarding and use corresponding upstream bandwidth according to said allocation classes phenotypic marker;
Wherein, said optical line terminal comprises:
The type identification unit is used for confirming said transmission container is distributed fixed-bandwidth or dynamic bandwidth according to the transmission container type of said optical network unit, and corresponding allocation classes phenotypic marker is set in said bandwidth allocation information;
Transmitting element is used for the bandwidth allocation information of carrying said allocation classes phenotypic marker is sent to said optical network unit;
Analytic unit is used for according to said allocation classes phenotypic marker or said allocation classes phenotypic marker and has or not new bandwidth allocation information, determines whether the time interval of sending next bandwidth allocation information and sending next bandwidth allocation information;
Wherein, said analytic unit distributes under the situation of dynamic bandwidth in said allocation classes phenotypic marker indication, instructs said transmitting element to send a bandwidth allocation information in each cycle; And distribute fixed-bandwidth and exist under the situation of new bandwidth allocation information in the indication of said allocation classes phenotypic marker, instruct said transmitting element to send said new bandwidth allocation information immediately.
8. EPON allocated bandwidth according to claim 7 system is characterized in that said optical network unit specifically comprises:
Receiving element is used to receive said bandwidth allocation information, and extracts allocation classes phenotypic marker wherein;
The bandwidth maintenance unit is used for that corresponding transmission container is carried out corresponding bandwidth allocation information storage and upstream bandwidth according to said allocation classes phenotypic marker and uses.
9. EPON allocated bandwidth according to claim 7 system; It is characterized in that; Said bandwidth maintenance unit distributes under the situation of dynamic bandwidth in said allocation classes phenotypic marker indication, after distributing the uplink burst bag through said upstream bandwidth, deletes said bandwidth allocation information immediately; And under the situation of said allocation classes phenotypic marker indication distribution fixed-bandwidth, said bandwidth allocation information is stored and the said upstream bandwidth of permanent use for a long time, until the new bandwidth allocation information of receiving that said optical line terminal is sent.
10. according to claim 7 or 9 described EPON allocated bandwidth systems; It is characterized in that; Said new bandwidth allocation information comprises: carry the bandwidth allocation information of new allocated bandwidth type, new amount of bandwidth and/or new starting and ending time, perhaps zero-time equals the special bandwidth allocation information of concluding time.
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| CN 200810217161 CN101729939B (en) | 2008-10-31 | 2008-10-31 | Method and system for distributing passive optical network bandwidth |
| PCT/CN2009/070118 WO2010048792A1 (en) | 2008-10-31 | 2009-01-13 | Method and system for bandwidth allocation in passive optical network |
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| CN101964756A (en) * | 2010-11-04 | 2011-02-02 | 南京中兴群力信息科技有限公司 | Uplink bandwidth assignment method for Ethernet passive optical network system |
| CN102821029B (en) * | 2011-06-08 | 2015-11-11 | 上海贝尔股份有限公司 | Multi-service bandwidth allocation method in a kind of Ethernet passive optical network and device thereof |
| CN102377675B (en) * | 2011-11-17 | 2015-06-17 | 海能达通信股份有限公司 | Dynamic bandwidth distribution method, device and system |
| CN105591795B (en) * | 2015-07-17 | 2020-03-06 | 新华三技术有限公司 | Bandwidth allocation method and device |
| CN107231248B (en) * | 2016-03-24 | 2020-05-19 | 深圳市中兴微电子技术有限公司 | Method and device for allocating uplink bandwidth of Ethernet passive optical network |
| CN105763487B (en) * | 2016-04-11 | 2019-02-15 | 中国联合网络通信集团有限公司 | A kind of method and device of upstream bandwidth distribution |
| CN108809851B (en) * | 2017-04-28 | 2021-01-29 | 华为技术有限公司 | Service bandwidth allocation method and device based on GPON system |
| CN111211915B (en) * | 2018-11-21 | 2022-09-16 | 中国科学院深圳先进技术研究院 | Method for adjusting network bandwidth of container, computer device and readable storage medium |
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