Cognitive radio is the emerging technology which
provide the innovative approach to improve the spectrum
utilization and alleviate the spectrum scarcity. Evaluation of the
spectrum occupancy is the step toward the future deployment of
cognitive radio. Worldwide several spectrum occupancy
measurement campaigns have been performed at different
location in context of cognitive radio. We reviewed past
measurement campaigns performed by different research groups
and analysis of empirical results. We further provide a spectrum
occupancy measurement framework for the proposed spectrum
measurement in India.