... underlay and overlay games, with utility functions defined in (14 )and( 15)andwiththe potential functions defined in (17 )and( 18), are exactpotential games is given in the appendix.3.2. A Bayesian Potential ... other hand, based on the overlay paradigm,besides selecting the transmission power and the frequency channel, the SUs devote part of their transmission power for relaying the primary transmission. ... scenario, and D&F relaymode, is shown in Figures 4, 5 ,and6 .Inparticular,Figure 4represents the choice of frequency channels, and Figures 5 and 6 depict the selection of the transmission power, ...