Secrecy Rate Region of Miso Interference Channel: Pareto Boundary and Non-cooperative Games

Competition in interference channels is modeled using noncooperative game theory. The well known Nash equilibrium often leads to inefficient solutions. In the current work, we study the achievable secrecy rate of a multiple-antenna (MISO) interference channel (IFC). First, we characterize the Pareto boundary of the secrecy rate region. Next, the parameterization is exploited to compute the Nash equilibrium. In contrast to the usual case in which the rate is considered as utility function, the Nash outcome is not maximum ratio transmission (MRT), it depends on the SNR and the channel realizations and it can be shown to be almost efficient at all SNR values. All results are illustrated by sample region plots, reaction curves, and average price of anarchy figures.