کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
461862 696640 2007 14 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Laboratory-based calibration of available bandwidth estimation tools
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر شبکه های کامپیوتری و ارتباطات
پیش نمایش صفحه اول مقاله
Laboratory-based calibration of available bandwidth estimation tools
چکیده انگلیسی

Examining the validity or accuracy of proposed available bandwidth estimation tools remains a challenging problem. A common approach consists of evaluating a newly developed tool using a combination of simple ns-type simulations and feasible experiments in situ (i.e., using parts of the actual Internet). In this paper, we argue that this strategy tends to fall short of establishing a reliable “ground truth,” and we advocate an alternative in vitro-like methodology for calibrating available bandwidth estimation tools that has not been widely used in this context. Our approach relies on performing controlled laboratory experiments and using a set of tools to visualize and analyze the relevant tool-specific traffic dynamics. We present a case study of how two canonical available bandwidth estimation tools, Spruce and Pathload, respond to increasingly more complex cross traffic and network path conditions. We expose measurement bias and algorithmic omissions that lead to poor tool calibration. As a result of this evaluation, we designed a calibrated available bandwidth estimation tool called Yaz that builds on the insights of Pathload. We show that in head to head comparisons with Spruce and Pathload, Yaz is significantly and consistently more accurate with respect to ground truth, and reports results more quickly with a small number of probes.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microprocessors and Microsystems - Volume 31, Issue 4, 1 June 2007, Pages 222–235
نویسندگان
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