John S. Baras, University
of Maryland
Abstract:We describe new
methods for multi-hop wireless network design. We
introduce an implicitly defined approximate 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
considers effects of the hidden nodes, node scheduling
algorithms, MAC and PHY layer failures and unsuccessful
packet transmission attempts at the MAC layer in
arbitrary network topologies where multiple paths share
nodes. We describe the application of Automatic
Differentiation (AD) to these implicit performance
models, and develop a methodology for sensitivity
analysis and parameter optimization for wireless
protocols. We also introduce new methods that utilize
on-line feedback from the PHY layer to simplify the
joint MAC and routing protocol design. We provide
several examples that demonstrate the benefits of
applying these new methods in an integrated manner.
[Presentation slides]
