Mobility

Exploiting the Burstiness of Intermediate-Quality Wireless Links

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Executive Summary

The authors address the challenge of link estimation and routing over highly dynamic links, that is, bursty links that rapidly shift between reliable and unreliable periods of transmissions. Based on significant empirical evidence of over 100,000 transmissions over each link in 802.15.4 and 802.11 test-beds, they propose two metrics, Expected Future Transmissions (EFT) and MAC3, for runtime estimation of bursty wireless links. They introduce a Bursty Link Estimator (BLE) that based on these two-metrics, accurately estimates bursty links in the network rendering them available for data transmissions. Finally, they present Bursty Routing Extensions (BRE): an adaptive routing strategy that uses BLE for forwarding packets over bursty links if they offer better routing progress than longterm-stable links.

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