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Theory and Practice in Wireless Networks

Explore the significance of experimental results in wireless network research and their impact on validating theoretical assumptions. Gain insights from experts Ratul Mahajan, Injong Rhee, Kamin Whitehouse, Bhaskar Krishnamachari, and Martin Haenggi on key aspects like multipath fading, path loss, energy consumption, link symmetry, overhead, coexistence, and protocol evaluation.

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Theory and Practice in Wireless Networks

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  1. Theory and Practice in Wireless Networks Panel 3: What constitutes a useful experimental result?

  2. Panelists • Ratul Mahajan (MS Research) • Injong Rhee (CS, NCSU) • Kamin Whitehouse (CS, U of Virginia) • Bhaskar Krishnamachari (EE and CS, USC) • Martin Haenggi (EE, ND)

  3. Question • Good experimental work can raise new questions and play an important role in validating or invalidating assumptions of and results from theoretical work. At the same time, experimental research faces the criticism of being driven too narrowly by current hardware limitations and market realities.

  4. Exampleswhere experiments are not only useful but crucial • Multipath fading, coherence times • Large-scale path loss • Energy consumption (independent of Tx power) • Link symmetry

  5. More Examples • Overhead (feedback, CSI)DARPA: 99% overhead? • Long hops vs. short hops • Coexistence (e.g., WiFi, ZigBee, BT) • Protocol evaluation • Scaling: Open testbeds, OSU’s ExScal

  6. Small-Scale Fading • Turntable experiment shows that there is no randomness. And SS doesn’t help.

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