CN102447978A - Dynamic bandwidth allocation method based on Report in EPON (Ethernet Passive Optical Network) system - Google Patents
Dynamic bandwidth allocation method based on Report in EPON (Ethernet Passive Optical Network) system Download PDFInfo
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- CN102447978A CN102447978A CN2010105027661A CN201010502766A CN102447978A CN 102447978 A CN102447978 A CN 102447978A CN 2010105027661 A CN2010105027661 A CN 2010105027661A CN 201010502766 A CN201010502766 A CN 201010502766A CN 102447978 A CN102447978 A CN 102447978A
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Abstract
The invention discloses a dynamic bandwidth allocation method based on Report in an EPON (Ethernet Passive Optical Network) system. The dynamic bandwidth allocation method comprises the following steps of: firstly, receiving Report information reported by certain ONU (Optical Network Unit) by an OLT (Optical Line Terminal); secondly, starting a model to predict the state of the ONU by the OLT; thirdly, issuing an authority frame to the ONU according to the processed Report information in the second step by the OLT; and fourthly, after the ONU receives the authority frame, transmitting data to the OLT. According to the dynamic bandwidth allocation method disclosed by the invention, the average delay of a network can be reduced and the problem of Report information loss is effectively solved.
Description
Technical field
The present invention relates in a kind of EPON system distribution method of dynamic bandwidth based on Report.
Background technology
In present EPON system, allocated bandwidth mechanism mainly is divided into following two kinds:
1. do not consider the static bandwidth allocation of Report, it is stable that this allocation strategy can be used for flow system flow, postpones to require under the little situation; Do not consider the static bandwidth allocation of Report, this is to confirm during by the network planning.
2. based on Dynamic Bandwidth Allocation (DBA) mechanism of Report, this allocation strategy can be used for flow system flow and present temporal properties, cannot when the network planning, confirm.
Based on Dynamic Bandwidth Allocation (DBA) mechanism of Report, traditional processing method is directly to distribute bandwidth (simply say, according to the much bandwidth of Report information requirements, distribute much bandwidth) according to the Report that ONU reports.The concrete Dynamic Bandwidth Allocation step based on Report can be: 1) OLT receives report (report frame) information of ONU constantly at T0; 2) OLT issues Grant (mandate frame) constantly at T1 and gives ONU; 3) ONU sends data to OLT constantly at T2.This way advantage is to handle simply, and shortcoming has: the network average retardation is big; The situation of can't correct handling Report losing.
Summary of the invention
The technical problem that the present invention will solve provides in a kind of EPON system distribution method of dynamic bandwidth based on Report.
For solving the problems of the technologies described above, based on the distribution method of dynamic bandwidth of Report, comprise the steps: in the EPON of the present invention system
1) OLT is in the Report information of receiving that certain ONU reports;
2) OLT starts the state of the said ONU of following model prediction, and said model is: Report_post=k * Report_input * weight+ (1-weight) * Report_post; Wherein Report_input reports Report information for this ONU, and k is an amplification coefficient, and weight is a filter factor, and Report_post is the Report information after handling, and K and weight are according to the pre-set numerical value of the service attribute of ONU.
3) OLT issues and authorizes frame to give said ONU according to the Report information after handling in the step 2; Report after the processing can think and simulated the state of ONU when sending data service better;
4) after said ONU receives and authorizes frame, send data to OLT.
Based on the distribution method of dynamic bandwidth of Report, can amplify the report information of Network in the EPON of the present invention system, make this professional network traffics postpone to reduce, thereby reduce the network average retardation with instantaneous stability.Simultaneously can adopt the average report information of certain hour to simulate the ONU state, solve the problem of report information dropout.
Description of drawings
Fig. 1 is a distribution method of dynamic bandwidth flow chart of the present invention.
Embodiment
The distribution method of dynamic bandwidth of Report comprises the steps: in the EPON of the present invention system
1) OLT receives the report information of ONU constantly at T0.
2) then, OLT starts the state of following model prediction ONU, and forecast model is: Report_post=k * Report_input * weight+ (1-weight) * Report_post;
Wherein Report_input reports Report information for this ONU, and k is an amplification coefficient, and weight is a filter factor, and Report_post is the Report information after handling, and K and weight are according to the pre-set numerical value of the service attribute of said ONU.
3) OLT issues Grant (mandate frame) constantly at T1 and gives ONU according to the Report information after handling.Because OLT is the amount of bandwidth that requires according in the Report information, the bandwidth that issues corresponding size is given ONU's.Initial Report information through the forecast model among the present invention, obtains amplifying or dwindling, and the amount of bandwidth that OLT is handed down to the mandate frame of ONU also produces corresponding variation, can reflect the state of ONU when sending data service thus more accurately.
4) ONU sends data to OLT constantly at T2; T0＜Ti＜T2 wherein;
Above-mentioned Model parameter k and weight; According to preestablishing by the ONU service attribute, like ONU, because of prediction does not have effect to Network with non-instantaneous stability; So can parameter k and weight all be set to 1, make that the Report before and after the prediction is consistent.In the concrete operations, these two parameters can be arranged in the LLID territory.In the EPON network system; Different ONU can be complementary with the different service attribute; Parameter K and weight can be provided with according to the ONU service attribute, suitable convergent-divergent Report information, and the service attribute of ONU then can be confirmed according to system network planning.When parameter K and weight are set to greater than 1 numerical value, amplify Report information; And when parameter K and weight are set to less than 1 numerical value, dwindle Report information.The concrete parameter values that is provided with to reach the purpose of accurate prediction, can obtain through the test of limited number of time.
In the distribution method of dynamic bandwidth based on Report in the EPON of the present invention system; Through parameter is set; Reasonably amplify original Report information (the Report information that ONU accepts at T0 constantly), simulate the T2 moment state of ONU, reach the purpose of more accurately distributing bandwidth.Based on the bandwidth of Report information distribution after the prediction, make and authorize frame can reflect information flow-rate more accurately, can be so that the network traffics of T2 to T0 between constantly postpone to reduce, thus reduce the network average retardation.In the distribution method of the present invention, can simulate the ONU state through the average Report information of certain hour, effectively solve the problem of Report information dropout with the concrete service attribute that record is arranged.
Based on the distribution method of dynamic bandwidth of Report, can solve Network in the EPON of the present invention system, reduce the network average retardation with instantaneous stability.
Claims (2)
- In the EPON system based on the distribution method of dynamic bandwidth of Report, it is characterized in that, comprise the steps:1) OLT receives the Report information that certain ONU reports;2) OLT starts the state of the said ONU of following model prediction, and said model is:Report_post=k * Report_input * weight+ (1-weight) * Report_post; Wherein Report_input is the Report information that said ONU reports, and k is an amplification coefficient, and weight is a filter factor, and Report_post is the Report information after handling; K and weight are according to the pre-set numerical value of the service attribute of said ONU.3) OLT issues and authorizes frame to give said ONU according to the Report information after handling in the step 2;4) after said ONU receives and authorizes frame, send data to OLT.
- 2. according to the distribution method of claim 1, it is characterized in that: the numerical value of said k and weight is arranged in the LLID territory.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105027661A CN102447978A (en) | 2010-10-11 | 2010-10-11 | Dynamic bandwidth allocation method based on Report in EPON (Ethernet Passive Optical Network) system |
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| CN2010105027661A CN102447978A (en) | 2010-10-11 | 2010-10-11 | Dynamic bandwidth allocation method based on Report in EPON (Ethernet Passive Optical Network) system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102664761A (en) * | 2012-05-25 | 2012-09-12 | 武汉烽火网络有限责任公司 | Method for EPON (Ethernet passive optical network) system to be compatible with authorization of multilink ONU (optical network unit) and single-link ONU |
| WO2018176730A1 (en) * | 2017-03-31 | 2018-10-04 | 深圳市中兴微电子技术有限公司 | Dynamic bandwidth allocation method and apparatus, and computer storage medium |
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| EP1848137A2 (en) * | 2006-04-20 | 2007-10-24 | Centillium Communications, Inc. | Enhanced upstream data traffic management for EPON |
| CN101127704A (en) * | 2007-09-20 | 2008-02-20 | 杭州华三通信技术有限公司 | A method and device for dynamic bandwidth allocation |
| CN101316141A (en) * | 2007-05-29 | 2008-12-03 | 华为技术有限公司 | Band width distribution method, device, communication apparatus and system |
| CN101500180A (en) * | 2008-02-02 | 2009-08-05 | 普然通讯技术(上海)有限公司 | Method for reporting uplink communication need in real-time |
| CN101667962A (en) * | 2009-10-14 | 2010-03-10 | 天津大学 | Dynamic bandwidth allocation method for self-adapting service quality assurance in Ethernet passive optical network |
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2010
- 2010-10-11 CN CN2010105027661A patent/CN102447978A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1848137A2 (en) * | 2006-04-20 | 2007-10-24 | Centillium Communications, Inc. | Enhanced upstream data traffic management for EPON |
| CN101316141A (en) * | 2007-05-29 | 2008-12-03 | 华为技术有限公司 | Band width distribution method, device, communication apparatus and system |
| CN101127704A (en) * | 2007-09-20 | 2008-02-20 | 杭州华三通信技术有限公司 | A method and device for dynamic bandwidth allocation |
| CN101500180A (en) * | 2008-02-02 | 2009-08-05 | 普然通讯技术(上海)有限公司 | Method for reporting uplink communication need in real-time |
| CN101667962A (en) * | 2009-10-14 | 2010-03-10 | 天津大学 | Dynamic bandwidth allocation method for self-adapting service quality assurance in Ethernet passive optical network |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102664761A (en) * | 2012-05-25 | 2012-09-12 | 武汉烽火网络有限责任公司 | Method for EPON (Ethernet passive optical network) system to be compatible with authorization of multilink ONU (optical network unit) and single-link ONU |
| CN102664761B (en) * | 2012-05-25 | 2014-10-29 | 武汉烽火网络有限责任公司 | Method for EPON (Ethernet passive optical network) system to be compatible with authorization of multilink ONU (optical network unit) and single-link ONU |
| WO2018176730A1 (en) * | 2017-03-31 | 2018-10-04 | 深圳市中兴微电子技术有限公司 | Dynamic bandwidth allocation method and apparatus, and computer storage medium |
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Application publication date: 20120509 |