Energy-Aware Competitive Power Control in Relay-Assisted Interference Channels with Direct Transmitters-Receivers Link

In this paper, the issue of competitive, energy- efficient power control in a relay-assisted interference channel is considered. The energy efficiency is measured in bit/Joule and is defined as the ratio of a SINR-based function, divided by the sum of the transmit power plus the circuit power consumed to operate the device. Taking also into account the direct path between transmitters and receivers, a non-cooperative power control game is devised. The proposed game is shown to always admit a Nash equilibrium and, based on its best-response dynamics, a power control algorithm that can be implemented in a fully distributed way is provided. Finally, numerical results are provided to show the merits of the proposed algorithms.