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准确的网络带宽测量对许多互联网应用和协议至关重要。现有带宽测量工具如Pathchar,Bing和Bprobe都假定链路对称.但ADSL、cable modem和卫星链路等的广泛存在,使测量必须考虑非对称链路.本文提出了一种新的非对称链路测量算法(ALBMA,Asymmetric Link Bandwidth Measurement Algorithm),来测量一条路径上各链路的双向带宽,并采用核密度评估算法过滤测量噪声.仿真验证了测量和滤波算法的有效性.与先前算法相比,ALBMA具有相近的测量精度,但测量速度更快,并且耗费网络资源少.
Accurate network bandwidth measurement is crucial for many Internet applications and protocols. Existing bandwidth measurement tools such as Pathchar, Bing, and Bprobe all assume link symmetry, but the widespread presence of ADSL, cable modem and satellite links makes measurements necessary to account for asymmetric links.This paper presents a new asymmetric chain (ALBMA, Asymmetric Link Bandwidth Measurement Algorithm) to measure the bi-directional bandwidth of each link in a path and measure the noise using kernel density estimation algorithm.The simulation verifies the validity of the measurement and filtering algorithms.Compared with the previous algorithm Compared to ALBMA, it has similar measurement accuracy, but it measures faster and consumes less network resources.