The rapid advancement in portable computing platforms and
wireless communication technology has led to significant interest in the design
and development of protocols for instantly deployable wireless networks, often
referred to as MANET: "Mobile Ad-Hoc Network". This thesis
concentrates on the transmission layer which is mostly
implemented by TCP (Transmission Control Protocol). TCP suffers a significant
drop in its throughput when it runs on a MANET. This significant TCP throughput
drop is mainly because of the TCP implicit assumption that any packet loss is
due to congestion, which causes TCP to invoke the congestion control
algorithms. This assumption is true for the wired network, but not true for the
MANET. Several protocols have been proposed for
improving the TCP throughput over a Standalone MANET. To the best of our knowledge this research is the first research that discuss,
propose and evaluate transmission control scheme for a MANET connected to the
wired network (MANET as Access Network). Our scheme consists of three
protocols, the TCP protocol on the wired network, the Snoop protocol on the
base station and the ATCP protocol on the MANET. The simulation results show
that our scheme was able to improve the TCP end-to-end connection throughput
without requiring changes to the TCP stack on the fixed host(s), limiting the
changes to the base station and the mobile host(s). This will make deploying
such a scheme much easier, as it does not require re-compiling and re-linking
existing applications.