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A simulation study of the impact of mobility on TCP/IP

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3 Author(s)
Manzoni, P. ; Politecnico di Milano, Italy ; Ghosal, D. ; Serazzi, G.

This paper presents a simulation analysis of the impact of mobility on data transport protocols. We consider the TCP/IP protocol augmented with features to support host mobility in wide area networks. Our results show that the existing version of TCP can yield low throughput in highly mobile environments due to the fact that TCP cannot discriminate packets dropped due to hand-offs with those dropped due to congestion in one or more network resources. We investigate a proposal in which the transport layer explicitly receives information from the network layer of any ongoing mobility. We show that by effectively capitalizing this information, TCP can appropriately extend the slow-start phase in the recovery process and achieve higher throughput. Based on the simulation analysis we also show the robustness of this scheme in the presence of both host mobility and network congestion

Published in:

Network Protocols, 1994. Proceedings., 1994 International Conference on

Date of Conference:

25-28 Oct 1994