Spectrum and Energy Aware Routing Protocol for Cognitive Radio Ad Hoc Networks

Throughput maximization is one of the core challenges in cognitive radio ad hoc networks (CRANs), where local spectrum resources are changing over time and locations. This paper proposes a spectrum and energy aware routing (SER) protocol for CRANs, which involves route selection and channel-timeslot assignment jointly. The proposed routing scheme with channel-timeslot assignment can balance the energy consumption, eliminate contention between users, and decompose contending traffic over different channels and timeslots. As a result, the proposed scheme leads to significant increases in network throughput and decreases the end-to-end delay. The simulation results show the effectiveness of the proposed approach with good generalization ability.