摘要
提出了一种支持多业务的结合上行物理层开销Ind域状态指示与流量预测的GPON动态带宽分配算法。该算法由光线路终端(OLT)设备通过检测上行流物理层开销Ind字段,判断各光网络单元(ONU)缓存中数据的有无,在此基础上根据AR模型计算并预测ONU的流量。该算法提高了ONU流量预测的精度,并且采用分组机制减少开销,同时有利于异厂商OLT和ONU设备的互通。仿真结果表明,该算法不仅保证多业务的不同QoS要求,而且具有较高的带宽利用率。
In this paper, a novel GPON DBA scheme, named Traffic Predicting Integrated with Status Indication, is proposed. In this scheme, Optical Line Terminal （OLT） determines ONU data cache＇s status by detecting upstream PLOu Ind field and further predicts ONU＇s traffic by AR model. The algorithm integrates the ad- vantages of status report and nonstatus report DBA, and it increases the predicting accuracy of ONU traffic with lower cost and has good interoperability between OLT and ONU made by different venders. The simulation results show that the algorithm has high bandwidth utilization and can guarantee multi-services＇ QoS requirements.
出处
《光通信技术》
CSCD
北大核心
2009年第5期14-17,共4页
Optical Communication Technology
基金
国家863计划(No.2007AA01Z243)资助
华为公司高校科技基金资助
