Moderate Deviations of Retransmission Buffers Over a Wireless Fading Channel

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Executive Summary

The authors study the buffer performance of retransmission protocols over a wireless link. The channel gain is modeled as a discrete-time complex Gaussian model. The advantage of this channel model over simpler alternatives (such as finite-state Markov models) is that the correspondence with the physical situation is more transparent. In order to keep the performance analysis of the buffer content tractable, they opt for heavy-traffic and moderate deviations scalings. They add some notes on the optimal selection of the signal to noise ratio.

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