Spectrum leasing in cooperative cognitive radio networks: An auction-based approach

The problem of resource allocation in a spectrum leasing scenario in Cooperative Cognitive Radio Networks (CCRN) is addressed, in this work. The system model consists of a number of primary user (PU) pairs and a secondary user (SU) pair. We propose a solution for resource allocation problem in the spectrum leasing scenario. More specifically, we determine when is beneficial for a PU to lease its unused spectrum portion to SU and how much of PU´s resource is optimum to be leased. The SU is supposed to cooperate with PUs by relaying the PUs´ signals, in return. Besides, the optimum allocated cooperating power of SU to relay each PU´s signals is determined. An efficient auction mechanism is proposed and the existence of the Nash Equilibrium (NE) for the proposed auction game is proved.