A novel node mobility(NoM) approach of cognitive Radio Networks (CRNs) communication in beyond 4g spectrum management (SM)

The amount of signaling needed to maintain the CRNs topology has been estimated with regard to different radius of clusters size management scenarios. The node mobility for the recommended network model has been simulated according to a Random Waypoint mobility model (RWP). The simulation results show that only a portion of the network hosts simultaneously traverse their respective cluster boundaries. Additionally, this amount is heavily impacted by the cluster sizes, which must be properly dimensioned based on factors like, local, geographical or regulatory considerations. The sides (vertices) of a large cluster become longer, which further increases the probability of nodes traversing them. Consequently, this signifies the need for a more flexible and dynamic allocation of the spectrum resources, which requires a new approach to cognitive radio network management. This can be achieved with the help of mobile devices capable of accurately sensing the spectrum occupancy, learning about temporarily unused frequency bands and able to reconfigure their transmission parameters in such a way that the spectral opportunities can be effectively exploited.