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Performance evaluation of mobile wireless networks

Ahmad Al Hanbali 1
1 MAESTRO - Models for the performance analysis and the control of networks
CRISAM - Inria Sophia Antipolis - Méditerranée
Abstract : This thesis deals with the mobility impact on the performance of mobile ad hoc network (MANET). It contains two parts. The first part surveys the TCP protocol over MANET.
The main conclusion is that mobility degrades the TCP performance. Since it induces frequent route failures and extended network partitions. These implications were the motivation in the second part to introduce and evaluate new transmission schemes that rely on the mobility to improve the capacity of MANET. More precisely, in the absence of a direct route between two nodes the rest of the nodes in the network can serve as the relay nodes. In the beginning, the focus was on the performance of the relay nodes (throughput and relay buffer size) using a detailed queueing analysis. One of the main results was that random mobility models that have uniform stationary distribution of nodes location achieve the lowest throughput of relaying. Next, in order to optimize the performance of the two-hop relay protocol, especially the delivery delay of packets, we evaluated the multicopy extension under the assumption that the lifetime of the packets is limited. The performance results (delivery delay, round trip time, consumed energy) were derived using the theory of absorbing Markov chains and the fluid approximations. These results were exploited to optimize the total energy consumed subject to a constraint on the delivery delay.
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Submitted on : Thursday, October 9, 2008 - 3:17:56 PM
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Ahmad Al Hanbali. Performance evaluation of mobile wireless networks. Networking and Internet Architecture [cs.NI]. Université Nice Sophia Antipolis, 2006. English. ⟨tel-00327868⟩

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