Collaboration and Coordination in Secondary Networks for Opportunistic Spectrum Access
In this paper, the authors address the general case of a coordinated secondary network willing to exploit communication opportunities left vacant by a licensed primary network. Since Secondary Users (SU) usually have no prior knowledge on the environment, they need to learn the availability of each channel through sensing techniques, which however can be prone to detection errors. They argue that cooperation among secondary users can enable efficient learning and coordination mechanisms in order to maximize the spectrum exploitation by SUs, while minimizing the impact on the primary network. To this goal, they provide three novel contributions in this paper.