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Link properties in 802.11b mesh networks and dense wireless sensor networks have been well studied. They have observed that wireless links assume complex properties, such as wide range non-uniform packet delivery rate at different distances, loose correlation between distance and packet delivery rate, link asymmetry, and temporal variations. The authors' study on link properties complements existing works by focusing on the differences between broadcast and unicast link properties, as well as the impact of interference pattern on the differences. Using an event traffic trace from the field sensor network of ExScal, they experimentally evaluate the design and the performance of LOF in a testbed of 195 Stargates with 802.11b radios.
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