Efficient Routing and Scheduling in Ad-Hoc Cognitive Radio Networks

In this paper, we propose a flexible and resilient communication system using an ad-hoc cognitive radio network that fully utilizes the available spectrum resources. Two main issues are addressed in this paper: route discovery, that is, identifying multiple paths from the source to the destination, and scheduling for these paths, that is, efficiently allocating available resources to achieve an optimal transmission. Field-based routing is adopted and it is shown through simulations that the proposed framework can efficiently reduce the transmission delay and be robust to the dynamics of channel availability in a cognitive radio network.