基于延遲參數(shù)的可用帶寬主動(dòng)估測(cè)算法
An Active Estimation Algorithm for Available Bandwidth Based on the Delay Parameters
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摘要: 可用帶寬是重要的網(wǎng)絡(luò)資源，但它的實(shí)際測(cè)量存在許多困難。該文基于延遲趨勢(shì)模型，提出一種端到端的可用帶寬估測(cè)算法SSP(SRdeg and SRdet Parameters)，設(shè)計(jì)了反映網(wǎng)絡(luò)傳輸性能的參數(shù)SRdeg 和SRdet ，通過(guò)端系統(tǒng)對(duì)參數(shù)進(jìn)行計(jì)算，主動(dòng)調(diào)整發(fā)送速率，從而快速估測(cè)到網(wǎng)絡(luò)的可用帶寬，達(dá)到有效利用網(wǎng)絡(luò)資源的目的。在NS2平臺(tái)進(jìn)行了參數(shù)和SSP算法的性能測(cè)試實(shí)驗(yàn)，并與當(dāng)前的帶寬估測(cè)工具Pathload進(jìn)行了比較。實(shí)驗(yàn)結(jié)果表明，SSP算法估測(cè)帶寬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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