CRAHNs: Cognitive radio ad hoc networks
Ad Hoc Networks
A survey on MAC protocols for cognitive radio networks
Ad Hoc Networks
Tuning radio resource in an overlay cognitive radio network for TCP: greed isn't good
IEEE Communications Magazine
A testbed development framework for cognitive radio networks
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
A survey of spectrum sensing algorithms for cognitive radio applications
IEEE Communications Surveys & Tutorials
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Currently, the radio spectrum is statically allocated and divided between licensed and unlicensed frequencies. This results in its inefficient usage. Cognitive Radio (CR) is a recent paradigm which aims at addressing this inefficiency. It allows unlicensed users to opportunistically access vacant licensed frequency bands, as long as any harmful interference to incumbent users is avoided. In this context, providing appropriate medium access control (MAC) protocols is a core issue. However, the existing proposals omit relevant issues, are too complex, or are based on unrealistic assumptions in practical terms. Therefore, in this paper, we propose and analyze, through simulation, what we intend to be a really practical CR MAC protocol for distributed (i.e., ad-hoc) multi-hop CR scenarios, with high variability in terms of the availability of vacant frequency bands in time and space. Evaluation results confirm that the proposed approach, designated as CoSBT MAC, can result in relevant benefits.