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Dynamic bandwidth allocation method based on Report in EPON (Ethernet Passive Optical Network) system

A technology of dynamic bandwidth allocation and allocation method, which is applied in multiplexing system selection devices, transmission systems, digital transmission systems, etc., can solve the problems of large average network delay and inability to correctly handle report loss, etc., to reduce the average delay , Solve the effect of report information loss and network traffic delay reduction

Inactive Publication Date: 2012-05-09
高通创锐讯通讯科技(上海)有限公司
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Problems solved by technology

[0004] 2. Report-based dynamic bandwidth allocation (DBA) mechanism, this allocation strategy can be used for transient characteristics of system traffic, and cannot be determined during network planning
The advantage of this method is that the processing is simple, but the disadvantages are: the average network delay is large; the report loss cannot be handled correctly

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  • Dynamic bandwidth allocation method based on Report in EPON (Ethernet Passive Optical Network) system
  • Dynamic bandwidth allocation method based on Report in EPON (Ethernet Passive Optical Network) system

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Embodiment Construction

[0014] The dynamic bandwidth allocation method of Report in the EPON system of the present invention comprises the steps:

[0015] 1) The OLT receives the report information from the ONU at time T0.

[0016] 2) Then, the OLT starts the following model to predict the state of the ONU, the prediction model is: Report_post=k×Report_input×weight+(1-weight)×Report_post;

[0017] Wherein Report_input is the Report information reported by the ONU, k is the amplification factor, weight is the filter coefficient, Report_post is the processed Report information, and K and weight are values ​​preset according to the service attributes of the ONU.

[0018] 3) The OLT sends a Grant (authorization frame) to the ONU at time T1 according to the processed Report information. This is because the OLT distributes the corresponding bandwidth to the ONU according to the bandwidth required in the Report information. The initial Report information is enlarged or reduced through the prediction model...

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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 [0001] The invention relates to a Report-based dynamic bandwidth allocation method in an EPON system. Background technique [0002] In the current EPON system, the bandwidth allocation mechanism is mainly divided into the following two types: [0003] 1. The static bandwidth allocation of Report is not considered. This allocation strategy can be used when the system traffic is stable and the delay requirement is small; the static bandwidth allocation of Report is not considered, which is determined during network planning. [0004] 2. Report-based Dynamic Bandwidth Allocation (DBA) mechanism, this allocation strategy can be used for transient characteristics of system traffic and cannot be determined during network planning. [0005] Based on the Report-based Dynamic Bandwidth Allocation (DBA) mechanism, the traditional processing method is to directly allocate bandwidth according to the Report reported by the ONU (in simple terms, how much bandwidth is requ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q11/00H04L12/56
Inventor 王冬
Owner 高通创锐讯通讯科技(上海)有限公司