Asymmetric Cooperative Communications Based Spectrum Leasing Via Auctions in Cognitive Radio Networks
Dynamic Spectrum Leasing (DSL) was proposed recently as a new paradigm for Dynamic Spectrum Sharing (DSS) in Cognitive Radio Networks (CRN's). In this paper, the authors propose a new way to encourage primary users to lease their spectrum: the Secondary Users (SU's) place bids indicating how much power they are willing to spend for relaying the primary signals to their destinations. In this formulation, the primary users achieve power savings due to asymmetric cooperation. They propose and analyze both a centralized and a distributed decision-making architecture for the secondary CRN. In the centralized architecture, a Secondary System Decision Center (SSDC) selects a bid for each primary channel based on optimal channel assignment for SU's.