Abstract:

A new viewpoint is proposed for the energyefficient power control games framework. Under the assumption that more intelligent users present, The Stackelberg equilibrium (SE) is introduced to represent the game results. It is proved that SE is superior to Nash equilibrium (NE) in terms of efficiency without any more network assistance. The proposed viewpoint and scenario can be regarded as a case that system overall performance is improved with help of cognitive knowledge being exploited by cognitive user. Simulation shows that, when in SE, all users can get more remarkable utility increase with decreased power than in NE. 

Key words: energyefficient power control, Nash equilibrium, Stackelberg equilibrium, cognitive radio networks