计算机应用 ›› 2010, Vol. 30 ›› Issue (1): 124-126.

• 网络与通信 • 上一篇    下一篇

一种改进的基于流量预测的动态带宽分配算法

郑宇1,李广军2,钱宇平3   

  1. 1.
    2. 电子科技大学通信与信息工程学院
    3. 电子科技大学清水河校区通信与信息工程学院
  • 收稿日期:2009-07-02 修回日期:2009-08-18 发布日期:2010-01-01 出版日期:2010-01-01
  • 通讯作者: 钱宇平

Improved DBA algorithm based on traffic prediction

  • Received:2009-07-02 Revised:2009-08-18 Online:2010-01-01 Published:2010-01-01

摘要: 介绍了一种基于流量预测的上行带宽动态分配算法(P-DBA)。PDBA算法根据短相关业务(SRD)和自相似、长相关业务(LRD)的流量特征建立了不同的线性预测模型,并在流量变化较快时放弃预测,以减小带宽浪费;同时,在光网络单元中提出一种配合预测机制的公平调度策略。仿真表明PDBA算法比DBAM算法在端到端延时、丢包率等方面有明显改善。

关键词: 以太无源光网络, 动态带宽分配, 流量预测, 服务质量

Abstract: P-DBA based on traffic prediction was presented, which established different linear prediction models for the ShortRange Dependence (SRD) and SongRange Dependence (LRD) traffic and drop prediction to reduce the bandwidth waste when the variation of traffic was rapid, while Optical Network Unit (ONU) used a new local fair scheduling policy adapted to the prediction strategy. The simulation result shows that end-to-end delay, and packet loss rate has been improved obviously, compared with DBAM algorithm.

Key words: Ethernet Passive Optical Network (EPON), Dynamic Bandwidth Allocation (DBA), traffic prediction, Quality of Service (QoS)