On Modeling and Accuracy Analysis of the Available Bandwidth Measurement Based-on Packet-pair Sampling

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http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52#.VNhy5CzQrzE

Author(s)   

Jun LIU, Dafang ZHANG, Junhang JIN

Affiliation(s)

School of Computer and communication, Hunan University, Changsha, P.R.China.
School of software, Hunan University, Changsha, P.R.China.
School of software, Hunan University, Changsha, P.R.China.

ABSTRACT

Packet-pair sampling, also called probe gap model (PGM) is proposed as a lightweight and fast available bandwidth measurement method. But measurement tools based on PGM gives results with great uncertainty in some cases. PGM’s statistical robustness has not been proved. In this paper we propose a more precise statistical model based on PGM. We present the new approach by using probability distribution and statistical parameters. We also investigate the use of a PGM bandwidth evaluation method considering a non-fluid cross traffic and present the alternative approach where the bursty nature of the probed traffic could be taken into account. Based on the model, measurement variance and sample size can be calculated to improve the measurement accuracy. We evaluated the model in a controlled and reproducible environment using NS simulations.

 

KEYWORDS

Active Probing, Probe Gap Model, Available Bandwidth, Variance, Sample Size, Traffic Burst

Cite this paper

J. LIU, D. ZHANG and J. JIN, "On Modeling and Accuracy Analysis of the Available Bandwidth Measurement Based-on Packet-pair Sampling," Int'l J. of Communications, Network and System Sciences, Vol. 1 No. 2, 2008, pp. 168-176. doi: 10.4236/ijcns.2008.12021.

 

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