Mobility

Combination of Centralized & Decentralized Database and Terminal-Based Spectrum Sensing for Secondary Spectrum Access

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Executive Summary

Since, the original Cognitive Radio (CR) concept had emerged, the opportunistic usage of selected frequency bands has become one of the most promising application scenarios from the perspective of a near-to mid-term broad market deployment. Driven by the prospect of a hugely increased overall spectral efficiency through the opportunistic exploitation of otherwise unused frequency bands and the favorable propagation conditions in some of the considered bands (such as the TV white spaces at 470-790 MHz), a series of large-scale research projects have studied the practical feasibility of such system concepts.

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