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Unbiased bandwidth estimation in communication protocols
KTH, School of Electrical Engineering (EES), Automatic Control.
KTH, School of Electrical Engineering (EES), Automatic Control. (System Identification Group)ORCID iD: 0000-0002-9368-3079
KTH, School of Electrical Engineering (EES), Automatic Control.ORCID iD: 0000-0001-9940-5929
2005 (English)In: Proceedings of the 16th IFAC World Congress, 2005, IFAC , 2005Conference paper, Published paper (Refereed)
Abstract [en]

Heterogeneous communication networks with their variety of application demands, uncertain time-varying trafc load, and mixture of wired and wireless links pose several challenging problem in modeling and control. In this paper we focus on bandwidth estimation and elucidate why estimates based directly on bandwidth samples are biased. Previously, this phenomenon has been observed but not properly explained, it seems. Standard techniques for bandwidth estimation are based on measurements of inter-arrival times of packets as the bandwidth is proportional to the inverse of the  nterarrival time. Two main classes of bandwidth estimators are analyzed wrt how variations in the inter-arrival times affect the estimates. It is shown that linear time-invariant ltering of instantaneous bandwidth estimates does not change the bias. In contrast to this, smoothing the inter-arrival-time samples does give a bias reduction which depends on the properties of the smoothing lter. Hence, with such approach, noise attenuation can be traded against tracking ability wrt changes in the actual bandwidth.

Place, publisher, year, edition, pages
IFAC , 2005.
Keyword [en]
Estimation, Communication Protocols, Communication Networks, TCP, Bandwidth
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-84769DOI: 10.3182/20050703-6-CZ-1902.01175Scopus ID: 2-s2.0-79960701333ISBN: 008045108X (print)ISBN: 9780080451084 (print)OAI: oai:DiVA.org:kth-84769DiVA: diva2:499599
Conference
IFAC World Congress, Prague, Czech Republic
Note

QC 20120220

Available from: 2012-02-20 Created: 2012-02-13 Last updated: 2014-11-27Bibliographically approved

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