To sense or not to sense in energy-efficient power control gamesReport as inadecuate

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1 L2S - Laboratoire des signaux et systèmes 2 LIA - Laboratoire Informatique d-Avignon 3 Chaire Radio Flexible - Chaire Radio Flexible Alcatel-Lucent-Supélec

Abstract : A network of cognitive transmitters is considered. Each transmitter has to decide his power control policy in order to maximize energy-efficiency of his transmission. For this, a transmitter has two actions to take. He has to decide whether to sense the power levels of the others or not which corresponds to a finite sensing game, and to choose his transmit power level for each block which corresponds to a compact power control game. The sensing game is shown to be a weighted potential game and its set of correlated equilibria is studied. Interestingly, it is shown that the general hybrid game where each transmitter can jointly choose the hybrid pair of actions to sense or not to sense, transmit power level leads to an outcome which is worse than the one obtained by playing the sensing game first, and then playing the power control game. This is an interesting Braess-type paradox to be aware of for energy-efficient power control in cognitive networks

Author: Mael Le Treust - Yezekael Hayel - Samson Lasaulce - Merouane Debbah -



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