面向以太无源光网的支持流量预测与预分配机制的动态带宽分配算法

提出了一种支持流量预测与预分配机制的动态带宽分配算法(DBA),能够对高优先级业务进行流量预测,并根据预测结果预先分配带宽,以避免“T 2”排队延时.同时,为了提高信道利用率,还引入了预测修正机制,一旦出现带宽剩余现象,就从下一周期开始对预测流量作进一步修正,使其更加逼近真实流量.仿真实验显示,该算法优于现有的DBA算法,不仅能够满足高优先级业务的延时要求,而且有效控制了低优先级业务延时异常现象的发生.

Traffic Estimation and Pre-allocation Supported Dynamic Bandwidth Allocation Algorithm for EPON

This paper presented a novel dynamic bandwidth allocation(DBA) algorithm that supports traffic estimation and bandwidth pre-allocation.To avoid the "T 2" queueing delay of high priority services,this algorithm forecasts their traffic,then assigns the equal amount of the bandwidth to them in advance according to the forecast results.Meanwhile,the rectification scheme is introduced to improve the bandwidth utilization.Once the bandwidth pre-allocated to high priority services is surplus,the rectification scheme will start to work from the next circle.The computer simulation results show that the proposed algorithm can meet the delay demands of high priority services and control the delay abnormity of low priority services simultaneously.