Link Quality Metrics in Large Scale Indoor Wireless Sensor Networks

Ana Bildea (1) , Olivier Alphand (1) , Franck Rousseau (1) , Andrzej Duda (1)

1 Drakkar

We report results of measurements on SensLAB, an indoor wireless sensor network testbed with a large number of nodes equipped with a CC1101 radio chip. We analyze RSSI and LQI to find the best way to discriminate good links from weak ones and in particular, to derive a metric that estimates the Packet Reception Ratio (PRR) the best. To obtain an estimator of PRR, we have fitted a Fermi-Dirac function to the scatter diagram of the average and standard variation of LQI. The function enables us to find PRR for a given level of LQI. We evaluate the estimator by computing PRR over a varying size window of transmissions and comparing with the estimator.

Mots clés: Received Signal Strength indicator (RSSI); Link Quality; Indicator (LQI); link and routing metrics; Wireless Sensor Networks; (WSN); SensLAB

Domaines: Réseaux et télécommunications [cs.NI]

Ana Bildea, Olivier Alphand, Franck Rousseau, Andrzej Duda. Link Quality Metrics in Large Scale Indoor Wireless Sensor Networks. Proceedings of the 24th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC'13), 2013, London, United Kingdom. ⟨10.1109/PIMRC.2013.6666451⟩. ⟨hal-01199098⟩