Energy-Harvesting Cognitive Radios in Smart Cities

In this chapter, we combine two important techniques, which are cognitive radio ( CR ) and energy harvesting ( EH ), to realize a smart city. We first study solutions to overcome the challenges for a smart city and investigate cognitive radio sensor networks ( CRSNs ), their Internet connection, and application of harvesting methods in CRSN domain. Furthermore, we reveal the motivations for spectrum‐aware and self‐sustaining communications in a smart city. In the light of these discussions, we study a networking architecture of Internet of Things ( IoT ) consisting of energy‐harvesting cognitive radios ( EH‐CRs ), i.e., Energy‐Harvesting Cognitive Internet of Things. By using this architecture, we also propose a general implementation framework for EH‐CRs for the smart city concept.