  In this paper, we consider the problem of wireless power control in an
interference channel where transmitters aim to maximize their own benefit. When
the individual payoff or utility function is derived from the transmission
efficiency and the spent power, previous works typically study the Nash
equilibrium of the resulting power control game. We propose to introduce
concepts of correlated and communication equilibria from game theory to find
efficient solutions (compared to the Nash equilibrium) for this problem.
Communication and correlated equilibria are analyzed for the power control
game, and we provide algorithms that can achieve these equilibria. Simulation
results demonstrate that the correlation is beneficial under some settings, and
the players achieve better payoffs.
