Energy Aware Spectrum Decision Framework for Cognitive Radio Networks

Recently cognitive radios have been proposed to mitigate the problem of spectrum scarcity and spectrum under-utilization. One of the key aspect of the cognitive radio is the optimal channel selection. The cognitive radio system selects a licensed band which has acceptable availability and also satisfies the system needs in terms of bandwidth and power constraints. To this end we propose an energy aware spectrum decision framework for cognitive radio network (ESDF-CR), which guarantees a certain level of QoS to the system running on low power, by selecting those channels which require lesser power for transmission. Channel selection and packet admission control techniques have been proposed to realize the spectrum decision framework. A comparison is done with random channel selection scheme to show the effectiveness of the proposed framework.