摘要
分析了以往状态报告型与非状态报告型GPON动态带宽分配算法的优缺点,采用二者相结合的方式,提出一种基于小波多尺度分析的GPON动态带宽分配算法(DBA.)算法通过小波预测模型获得ONU的实时业务量,并采用权重优先级的方式为各ONU合理分配上行带宽.给出了算法的实现步骤,在OPNET环境下建立了GPON的仿真模型,对所提出算法的有效性进行了验证.结果表明,算法获得了较低的传输时延和较高的带宽利用率,是一套完整可行的动态带宽分配方案.
This paper analyzes the advantages and disadvantages of the previous status report and Non-Status Report types of DBA（dynamic bandwidth allocation）algorithm based on GPON,and then,by choosing a combination of both methods,proposes a DBA scheme in GPON based on Wavelet multiscale model.The algorithm can obtain ONU realtime traffic by wavelet prediction model,for the rational allocation of upstream bandwidth of ONU by using weighted priority mode.The implementation steps of the algorithm are given.The simulation model based on GPON was established in OPNET environment,and the effectiveness of the proposed algorithm was verified.The results show that the algorithm can achieve lower propagation delay and higher bandwidth utilization,and it is a complete set of feasible dynamic bandwidth allocation scheme.
出处
《应用科技》
CAS
2011年第3期46-49,共4页
Applied Science and Technology
