Performance Metric Sensitivity Computation for Optimization and Trade-off Analysis in Wireless Networks

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Date
2008-02-26Author
Baras, John S.
Tabatabaee, Vahid
Papageorgiou, George
Rentz, Nicolas
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Show full item recordAbstract
We develop and evaluate a new method for estimating and optimizing
various performance metrics for multi-hop wireless networks,
including MANETs. We introduce an approximate (throughput) loss
model that couples the physical, MAC and routing layers effects.
The model provides quantitative statistical relations between the
loss parameters that are used to characterize multiuser interference
and physical path conditions on the one hand and the traffic rates
between origin-destination pairs on the other. The model takes into
account effects of the hidden nodes, scheduling algorithms,
IEEE 802.11 MAC and
PHY layer transmission failures and finite packet transmission retries
at the MAC layer in arbitrary network topologies where multiple paths
share nodes. We apply Automatic Differentiation (AD) to these implicit
performance models, and develop a methodology for sensitivity analysis,
parameter optimization and trade-off analysis for key wireless protocols.
Finally, we provide simulation experiments to evaluate the effectiveness
and performance estimation accuracy of the proposed models and
methodologies.