The Performance of Multiple TCP Flows with Vertical Handoff

Copyright 2009 ACM. Reprinted with permission. Published in Proc. 7th ACM International Symposium on Mobility Management and Wireless Access MOBIWAC 2009, October 26-27, Tenerife, Canary Islands, Spain.

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Abstract: The performance of an individual TCP flow with a vertical handoff has been studied in several papers. However, the effect of a vertical handoff on multiple TCP flows has been little studied. In this paper we study the behaviour of multiple competing TCP flows with a vertical handoff. As a part of this study we evaluate the cross-layer assisted TCP enhancements for a vertical handoff that we had earlier proposed and analyzed for a single TCP flow. We show that our algorithms can be adapted for multiple TCP flows with minor modifications and that they are effective in improving multiple flow-TCP performance in the presence of a vertical handoff.