T. Edwan, L. Guan, G. Oikonomou, I. Phillips

Final Draft:
Abstract:
This paper presents a control-theoretic-like analysis of TCP congestion control mechanism. We extend previous analysis by considering two additional factors: i) wireless link errors and ii) general variable multiplicative decrease (MD). Wireless link errors are usually the cause for unnecessary TCP congestion window reductions and thus lower throughput. We also study the effects of those parameters on TCP's stability condition. In this paper, we present a modified TCP model and analyse it in the presence of delay. This is then linearised around an equilibrium point and re-analysed using a control-theoretic-like framework. The analysis verifies that non-congestive packet loss acts as a disturbance, as opposed to loss due to congestion, which is well within TCP's control.
Reference:
T. Edwan, L. Guan, G. Oikonomou, I. Phillips, "Understanding the Impact of Link Errors on TCP Congestion Control", in Proc. 26th UK Performance Engineering Workshop (UK PEW 2010), Coventry, UK, pp. 59-64, 2010
Bibtex Entry:
@INPROCEEDINGS{Edwan-2010-2-uk-pew,
	author = {Talal Edwan and Lin Guan and George Oikonomou and Iain Phillips},
	title = {Understanding the Impact of Link Errors on TCP Congestion Control},
	year = {2010},
	month = {June},
	address = {Coventry, UK},
	booktitle = {Proc. 26th UK Performance Engineering Workshop (UK PEW 2010)},
	pages = {59--64},
	gsid = {4311161433930400772},
	abstract = {This paper presents a control-theoretic-like analysis of TCP congestion control mechanism. We extend previous analysis by considering two additional factors: i) wireless link errors and ii) general variable multiplicative decrease (MD). Wireless link errors are usually the cause for unnecessary TCP congestion window reductions and thus lower throughput. We also study the effects of those parameters on TCP's stability condition. In this paper, we present a modified TCP model and analyse it in the presence of delay. This is then linearised around an equilibrium point and re-analysed using a control-theoretic-like framework. The analysis verifies that non-congestive packet loss acts as a disturbance, as opposed to loss due to congestion, which is well within TCP's control.}
}
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Understanding the Impact of Link Errors on TCP Congestion Control