基于预测的VBR优化带宽分配模型

Model of VBR Optinum Dynamic Bandwidth Allocation Based on Prediction

研究 VBR业务的动态带宽分配问题。以往的 VBR动态带宽分配模型中多只注重对VBR业务的预测研究 ,而忽视分配机制对业务的 QOS参数影响。基于此 ,提出了一个优化的动态带宽分配模型。该模型在预测值的基础上 ,以信元丢失率最小为优化目标对系统的带宽资源进行了优化分配 ,并用随机优化算法求出最优带宽分配向量。与以往方案相比 ,最优化的带宽分配在信元丢失率上达到最优 ,有效地保证了业务 QOS参数。

In this paper we make a research on VBR dynamic bandwidth allocation.Many researches have been made on VBR dynamic bandwidth allocation,but most of them focus on traffic prediction,not on traffic QOS guarantees.Based on their researches,an optinum dynamic bandwidth allocation model is first proposed.In this model,bandwidth allocation assignment is aiming the minimization of the cell lose rate,which could be implemented by random optimization.Simulation results show that our model possesses better performance over the references.