NDLI: Towards modeling effect of packet-level TCP dynamics on Internet operations and management

Content Provider	IEEE Xplore Digital Library
Author	Marbukh, V.
Copyright Year	2012
Description	Author affiliation: National Institute of Standards and Technology, 100 Bureau Drive, Stop 8920, Gaithersburg, MD 20899-8920 (Marbukh, V.)
Abstract	This paper reports on work in progress on modeling of the effect of packet-level TCP congestion avoidance dynamics on flow-level Internet performance and management including buffer sizing under arriving/departing flows. The proposed model accounts for the packet-level TCP burstiness due to congestion avoidance dynamics by incorporating the entire effective bandwidth of TCP-controlled traffic as opposed to the conventional model which accounts for the average TCP rate only. In particular, we demonstrate that conventional Markov model of Internet performance is applicable only in a case of sufficiently heavy average load corresponding to long flow-level queues and file transfer times. In a case of lighter average load the conventional Markov performance model significantly underestimates flow-level queues and file transfer times, and surprisingly a simpler mean-field performance model may be more accurate. While increasing buffer sizes causes proportional increase in the worst-case packet-level delays, the positive effect on the average capacity utilization and flow-level performance may be muted due to increase in the TCP burstiness. These conclusions may explain and quantify observed self-similarity of TCP traffic, and have important implications for the Internet design, operations, and management.
Starting Page	470
Ending Page	473
File Size	445553
Page Count	4
File Format	PDF
ISBN	9781467302678
ISSN	15421201
e-ISBN	9781467302692
e-ISBN	9781467302685
DOI	10.1109/NOMS.2012.6211933
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-04-16
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Markov processes Bandwidth Aggregates Internet Approximation methods Buffer overflow Mathematical model buffer sizing packet-level TCP dynamics flow-level Internet performance
Content Type	Text
Resource Type	Article

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