Optimizing Bit Transmission Power for Link Layer Energy Efficiency

Abstract

In this paper, we study the issue of optimizing transmission power (energy per symbol) for minimizing the expected energy required to deliver a frame to the destination node in a point-to-point link employing an automatic repeat request (ARQ) scheme over a fading channel. We derive the expected energy as a function of the transmission power and derive a simple optimization algorithm based on the properties of this function.