An Active Estimation Algorithm for Available Bandwidth Based on the Delay Parameters

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.