基于延遲參數(shù)的可用帶寬主動估測算法
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，但它的實際測量存在許多困難。該文基于延遲趨勢模型，提出一種端到端的可用帶寬估測算法SSP(SRdeg and SRdet Parameters)，設(shè)計了反映網(wǎng)絡(luò)傳輸性能的參數(shù)SRdeg 和SRdet ，通過端系統(tǒng)對參數(shù)進行計算，主動調(diào)整發(fā)送速率，從而快速估測到網(wǎng)絡(luò)的可用帶寬，達到有效利用網(wǎng)絡(luò)資源的目的。在NS2平臺進行了參數(shù)和SSP算法的性能測試實驗，并與當前的帶寬估測工具Pathload進行了比較。實驗結(jié)果表明，SSP算法估測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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