NDLI: A method of bandwidth dimensioning and management for aggregated TCP flows with heterogeneous access links

Content Provider	IEEE Xplore Digital Library
Author	Kawahara, R. Ishibashi, K. Mori, T. Ozawa, T. Sumita, S. Abe, T.
Copyright Year	2004
Description	Author affiliation: NTT Service Integration Lab., NTT Corp., Tokyo, Japan (Kawahara, R.)
Abstract	We propose a method of dimensioning and managing the bandwidth of a link on which flows arriving on access links that have heterogeneous bandwidths are aggregated. We start by developing a formula that approximates the mean TCP file-transfer time of a flow in such a situation. This only requires the bandwidth of the access link carrying the flow and the bandwidth and utilization of the aggregation link, each of which is easy to set or measure. We then extend the approximation to handle various factors that affect actual TCP behavior, such as round-trip time and restrictions other than the access-link bandwidth and congestion of the aggregation link in the end-to-end path of the flow. To do this, we define the virtual access-link bandwidth as the file-transfer speed of the flow when utilization of the aggregation link is negligibly small. We apply the virtual access-link bandwidth in the approximation to estimate the TCP performance of the flow with increasing utilization of the aggregation link. We use this method of estimation as the basis for a method of dimensioning the bandwidth of the link such that TCP performance is maintained and a method of managing bandwidth by comparing measured link utilization with the estimated threshold that indicates degradation of TCP performance. We also use simulation to analyze the accuracy of the estimates produced by our method.
Sponsorship	mobilkon austria Telekon Austria Deutsche Telekon Siemens AG Austria
Starting Page	15
Ending Page	20
File Size	1647508
Page Count	6
File Format	PDF
ISBN	3800728400
DOI	10.1109/NETWKS.2004.240681
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-06-13
Publisher Place	Austria
Access Restriction	Subscribed
Rights Holder	VDE Verlag Gmbh
Subject Keyword	Degradation Analytical models Fluid flow measurement Web and internet services Bandwidth Telecommunication traffic Quality of service TCPIP Traffic control IP networks
Content Type	Text
Resource Type	Article

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