Joint spectrum and power allocation in coded cooperative cognitive radio networks

Cooperative cognitive radio (CR) improves quality of service (e.g. rate) of primary users by cooperative transmission from secondary uses. However, as owners of the spectrum, primary users' traffic demands are relatively easy to be satisfied. The rationale is that they would be more interested in the benefits of other format (e.g. revenue), instead of the enhanced rate. In this paper, we propose a new cooperative CR framework, where primary users assist transmissions of secondary users. In exchange for this concession, primary users receive the payments of secondary users for the spectrum and cooperative transmit power being used in cooperation. An auction-theoretic model with multiple auctioneers, multiple bidders and multiple commodities is developed for a joint spectrum and cooperative power allocation. Finally, we mathematically prove the convergence of the proposed auction, and verify the performance of the proposed scheme by numerical results.