Greedy Receivers in IEEE 802.11 Hotspots: Impacts and Detection

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As wireless hotspot business becomes a tremendous financial success, users of these networks have increasing motives to misbehave in order to obtain more bandwidth at the expense of other users. Such misbehaviors threaten the performance and availability of hotspot networks, and have recently attracted increasing research attention. However the existing work so far focuses on sender-side misbehavior. Motivated by the observation that many hotspot users receive more traffic than they send, they study greedy receivers in this paper. The authors identify a range of greedy receiver misbehaviors, and quantify their damage using both simulation and testbed experiments.