Giustiniano, Domenico and Malone, David and Leith, Douglas J. and Papagiannaki, Konstantina
Estimating Link Quality in 802.11 WLANs.
Hamilton Institute, Maynooth, Co. Kildare, Ireland.
We propose a powerful new MAC/PHY cross-layer
approach to estimating link quality in 802.11WLANs. Unlike previous
approaches, we explicitly classify channel impairments into
noise-related losses, collision induced losses, hidden-node losses
and 802.11 impairments caused by exposed nodes and capture
effects. Our approach distinguishes among these different types
of impairments without requiring any modification to the 802.11
protocol and provides separate quantitative measures of the
severity of each one. Our approach is suited to implementation
on commodity hardware and we demonstrate both a prototype
implementation and experimental assessments.
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