Integrating energy harvesting and dynamic spectrum allocation in Cognitive Radio Networks
Ayman Sabbah, Mohamed A. Ibnkahla · 2016
Enabling Energy Harvesting (EH) for Cognitive Radio Networks (CRNs) is promising to extend their lifetime. Since Secondary Users (SUs) can either access the spectrum or harvest energy, EH should be integrated within the context of Dynamic Spectrum Access (DSA), in order to increase both the energy efficiency and the spectrum efficiency. This paper proposes a novel algorithm that enables SUs to harvest energy with minimal impact on their spectrum access performance. The algorithm allows SUs to participate in making decisions regarding their operating mode. Moreover, the algorithm ensures that the level of energy in the CRN cannot be lower than a specific threshold. The performance is studied for two types of access schemes: interweave and hybrid underlay/interweave. The results show that the proposed algorithm provides a good balance between accessing the spectrum and harvesting energy.