Cooperative Spectrum Sensing For Cognitive Radio Vehicular Ad Hoc Networks: An Overview And Open Research Issues

Cognitive Radio Vehicular Ad hoc Networks (CR-VANETs) utilize CR technology to increase frequency bandwidth for vehicular communications. Cooperative Spectrum Sensing (CSS) exploits spatial and temporal diversity for fast and accurate detection of Primary Users (PUs). This paper provides an overview of CSS techniques for CR-VANETs. We review state of the art CSS techniques proposed in literature highlighting their advantages, implementation challenges, and overhead. We then discuss open research issues and future directions, with emphasis on security threats as well as the control and coordination traffic overhead.