Energy-aware competitive resource allocation in relay-assisted interference channels

The issue of non-cooperative, energy-efficient power control in a relay-assisted interference channel is tackled in this paper, based on a game-theoretic approach. A pricing-based utility function is considered, in which the price controls the trade-off between maximizing the achievable rate and saving as much battery power as possible. Unlike most previous related literature, not only the transmit power, but also the power dissipated in terminal's electronic circuitry to operate the device is taken into account. Relay matrix design is also carried out according to a zero-forcing approach. Uniqueness of the Nash equilibrium and global convergence of the best-response dynamics to the unique Nash equilibrium are shown for the newly proposed non-cooperative game. Finally, numerical results are provided to show the merits of the proposed algorithms.