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Accurate and fast packet delivery rate (PDR) estimation, used in evaluatingwireless link quality, is a prerequisite to increase the performance of mobile,multi-hop and multi-rate wireless ad hoc networks. Unfortunately, contemporaryPDR estimation methods, i.e. beacon-based packet counting in EstimatedTransmission Time and Expected Transmission Count metrics, have unsatisfactoryperformance. Therefore, in this paper we propose a novel PDR estimation methodbased on SNR profiles. We classify all possible link quality estimation methodsand compare them analytically against our design. Results show that it leads toa more efficient link quality estimation. Further investigations with theprototype implementation of our method in IEEE 802.11b/g testbeds reveal thatthe accuracy of PDR estimation in mobile scenarios can be improved up to 50% incomparison to generic packet-based PDR. Experiments with the same prototype onlink and routing layers for different measurement scenarios show that it leadsto a better rate adaptation and route selection in the form of end-to-endthroughput increase compared to traditional packet counting methods.

Practical Rate and Route Adaptation with Efficient Link Quality Estimation for IEEE 802.11b/g Multi-Hop Networks