基于延迟参数的可用带宽主动估测算法
An Active Estimation Algorithm for Available Bandwidth Based on the Delay Parameters
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摘要: 可用带宽是重要的网络资源，但它的实际测量存在许多困难。该文基于延迟趋势模型，提出一种端到端的可用带宽估测算法SSP(SRdeg and SRdet Parameters)，设计了反映网络传输性能的参数SRdeg 和SRdet ，通过端系统对参数进行计算，主动调整发送速率，从而快速估测到网络的可用带宽，达到有效利用网络资源的目的。在NS2平台进行了参数和SSP算法的性能测试实验，并与当前的带宽估测工具Pathload进行了比较。实验结果表明，SSP算法估测带宽的精度和效率都高于Pathload。Abstract: Available bandwidth is one of the important network resources, but it difficult to measure in practice. In this paper, SSP(SRdeg and SRdet parameters), an active end-to-end available bandwidth estimation algorithm based on delay trend model, is proposed. Two parameters SRdeg and SRdetare designed which can indicate the network transmission performance changes. By calculating these parameters, the end system can adjust the transmission rate so that the available bandwidth can be estimated quickly as well as the network resources can be effectively used. The parameters are tested by NS2 simulation platform. The performance of SSP algorithm is compared with Pathload, a currently used tool on available bandwidth estimation. The simulation experiments show that the proposed algorithm SSP is more efficient and accurate than that of Pathload.
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