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Analysis of RTO Caused by Retransmission Loss to Combat Channel Noise

by Bhavika Gambhava, N. J. Kothari, K. S. Dasgupta
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International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 1 - Number 8
Year of Publication: 2010
Authors: Bhavika Gambhava, N. J. Kothari, K. S. Dasgupta
10.5120/190-327

Bhavika Gambhava, N. J. Kothari, K. S. Dasgupta . Analysis of RTO Caused by Retransmission Loss to Combat Channel Noise. International Journal of Computer Applications. 1, 8 ( February 2010), 5-9. DOI=10.5120/190-327

@article{ 10.5120/190-327,
author = { Bhavika Gambhava, N. J. Kothari, K. S. Dasgupta },
title = { Analysis of RTO Caused by Retransmission Loss to Combat Channel Noise },
journal = { International Journal of Computer Applications },
issue_date = { February 2010 },
volume = { 1 },
number = { 8 },
month = { February },
year = { 2010 },
issn = { 0975-8887 },
pages = { 5-9 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume1/number8/190-327/ },
doi = { 10.5120/190-327 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2024-02-06T19:45:08.213865+05:30
%A Bhavika Gambhava
%A N. J. Kothari
%A K. S. Dasgupta
%T Analysis of RTO Caused by Retransmission Loss to Combat Channel Noise
%J International Journal of Computer Applications
%@ 0975-8887
%V 1
%N 8
%P 5-9
%D 2010
%I Foundation of Computer Science (FCS), NY, USA
Abstract

A Retransmission Time Out (RTO) is inevitable, when the retransmission of a packet fails to reach the receiver. An RTO compels TCP to reduce packet flow drastically. However, in case of an RTO resulting from retransmission failure caused by the channel noise, reduction in the flow is inappropriate. The problem is compounded when a TCP sender is forbidden to continue transmission till the occurrence of the timeout. In this paper, we investigate the impact of such RTOs with the help of an empirical mathematical analysis. The analysis presented in the paper calculates the idle period of the sender in terms of number of RTTs, which depends on the value of congestion window before the timeout. The mathematical analysis is supported by the results of simulation based experiments and the evaluation of a scheme that improves TCP performance in case of avoidable timeouts caused by the loss of retransmission on an erroneous wireless link.

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Index Terms

Computer Science
Information Sciences

Keywords

RTO SACK_OK cwnd cwnd

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