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Adaptive Window Size to Reduce the Influence of Heterogeneous Mobility on TCP Performance
Citation key steuer2008a
Author Steuer, Frank and Kirschnick, Niklas and Vidales, Pablo and Albayrak, Sahin
Title of Book IEEE Symposium on Computers and Communications (ISCC'08)
Pages 149–156
Year 2008
ISBN 978-1-4244-2702-4
Month jul
Abstract The proliferation of wireless access technologies and the growth of demand for mobile services pose the need for seamless mobility across heterogeneous networks. Moreover, the widespread use of the TCP/IP protocol stack clearly reinforces the need to enhance its performance in such scenarios. In this paper we present an experimental evaluation of the influence of the so called heterogeneous (vertical) mobility on the TCP protocol, and propose a cross-layer solution to reduce this impact in future mobile enviroments. The described solution is based on the dynamic adaptation of the window size for a TCP connection, based on the related mobility conditions. We have evaluated this solution using the BIB3R testbed, which emulates the inter-working between commercial wireless technologies (e.g., UMTS, Wi-Fi, WiMAX, etc). The results showed that by adapting the window size before the vertical handover process, TCP connections can adapt faster to heterogeneous links, reducing adaptation time between 30 and 40 percent depending on the mobility scenario.
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