Mobility

On Link-Level Starvation in Dense 802.11 Wireless Community Networks

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Executive Summary

With the growing number of spontaneously deployed Wi-Fi hotspots and home networks, end-users often experience significant performance degradation or even starvation. However, the authors observe that tuning individual system parameters (channel, Tx power, carrier sense threshold, transmit rate, etc.) is insufficient and may lead to starvation in some cases. In this paper, they develop a comprehensive analytical model to characterize the throughput of individual links in dense IEEE 802.11 wireless community networks that accounts for heterogeneous transmission power levels and CS thresholds, as well as various sources of packet collisions. Based on the insight from the theoretical analysis, they propose a simple identification mechanism that can determine the sources of starvation using local measurements.

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