Universidad Politecnica de Madrid
In cognitive radio networks, there are scenarios where Secondary Users (SUs) utilize opportunistically the spectrum originally allocated to Primary Users (PUs). The spectrum resources available to SUs fluctuate over time due to PUs activity, SUs mobility and competition between SUs. In order to utilize these resources efficiently spectrum sharing techniques need to be implemented. In this paper, the authors present an approach based on game-theoretical mechanism design for dynamic spectrum sharing. Each time a channel is not been used by any PU, it is allocated to SUs by a central spectrum manager based on the valuations of the channel reported by all SUs willing to use it.