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Interference model is the basis of MAC protocol design in wireless networks, and it directly affects the efficiency and predictability of wireless messaging. To exploit the strengths of both the physical and the protocol interference models and to understand the varying observations on the relative goodness of scheduling based on the two models in literature, the authors analyze how network traffic, link length, and wireless signal attenuation affect the optimal instantiation of the protocol model. They also identify the inherent trade-off between reliability and throughput in the model instantiation. The analysis explains the seemingly inconsistent observations in literature and sheds light on the open problem of efficiently optimizing the protocol model instantiation.
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