Cross Layer Design for Primary User Modeling in Cognitive Radio Ad-hoc Sensor Network

Presence of Primary Users is one of the critical roadblocks for successful operation among SU network. Increasing primary users’ activity in the available spectrum band, enhances the chances of interference and spectrum unavailability for Secondary Users (SU) communication. All the existing techniques consider the fact that, at a time, only single Primary User (PU) is using the license spectrum band. But this assumption is not correct for real-time scenarios, as there can be multiple PUs operating simultaneously, further degrading the SU performance. Hence, all the interference calculation, channel switching and spectrum access design related models considering single PU operation, do not make practical sense for real time deployment of cognitive radio sensor network. Therefore, the concept of multiple PU operation (CogRPU) has been proposed by considering the real time field deployment scenario. Furthermore, a suitable cross layer design is developed in order to overcome the CogRPU problem and it showed a considerable performance improvement between without cross layer and with cross layer techniques.