TCP PERFORMANCE OF MOBILE IP IN WIRELESS NETWORKS
JEAN-PIERRE NZIGA
Approved:
-----------------------------------------------------Lawrence J. Osborne
Supervising Professor
-----------------------------------------------------Hikyoo Koh
Committee Member
-----------------------------------------------------Dehu Qi
Committee Member
-----------------------------------------------------Lawrence J. Osborne
Chair, Department of Computer Science
-----------------------------------------------------Jack R. Hopper
Dean, College of Engineering
-----------------------------------------------------Jerry W. Bradley
Associate Vice President for Research
And Dean of Graduate Studies
 2003 by Jean-Pierre Nziga
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ABSTRACT
TCP PERFORMANCE OF MOBILE IP IN WIRELESS NETWORKS
Jean-Pierre Nziga
The main purpose of this thesis is to study the performance of the Transmission Control
Protocol (TCP) over a wireless network with a mobile node.
TCP performs well on the wired network, but presents a poor behavior on the
wireless network due to the high bit rate over the wireless links and the handoff while the
mobile node changes the cell. Solutions have been proposed to enhance the behavior of
the TCP in the wireless link, but none tests the proposed solutions on all network
capabilities. In addition, all previous research proposals to differentiate between the
motion-related packet losses and congestion-related packet losses present serious
drawbacks.
In this thesis, using the NS simulator, we will examine in detail the behavior of
the wireless networks with a mobile node, but unlike other authors, we will test the
performance of the TCP using all TCP flavors (Reno, NewReno, Tahoe, Vegas, Sack,
Fack), using all the routing protocols available (DSDV, DSR, TORA, AODV), and
different speeds for the mobile node.
This will allow us to find the combination of TCP, speed, and routing protocol
needed to achieve a high throughput in communication with a mobile host, and perhaps
trigger another approach to TCP improvement over wireless networks with mobile nodes.