Efficient Discovery of Spectrum Opportunities with MAC-Layer Sensing in Cognitive Radio Networks
IEEE Transactions on Mobile Computing
IEEE 802.22: the first cognitive radio wireless regional area network standard
IEEE Communications Magazine
Interference management and performance analysis of UMTS/HSPA+ femtocells
IEEE Communications Magazine
EURASIP Journal on Wireless Communications and Networking - Special issue on femtocell networks
A survey of spectrum sensing algorithms for cognitive radio applications
IEEE Communications Surveys & Tutorials
IEEE Communications Magazine
WiMAX femtocells: a perspective on network architecture, capacity, and coverage
IEEE Communications Magazine
Business case evaluations for LTE network offloading with cognitive femtocells
Telecommunications Policy
Media access protocol for a coexisting cognitive femtocell network
Computer Networks: The International Journal of Computer and Telecommunications Networking
A dynamic programming approximation for downlink channel allocation in cognitive femtocell networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
Distributed Delay-Aware Routing and Metrics Evaluation for Cognitive Radio Networks
Wireless Personal Communications: An International Journal
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We define and propose a femtocell-based cognitive radio architecture for enabling multitiered opportunistic access in next-generation broadband wireless systems. This architecture combines the conventional femtocell idea with an infrastructure-based overlay cognitive network paradigm. The cognitive femtocell concept leads to simpler and easier proliferation of cognitive radio into practical systems. We highlight the drawbacks and advantages of the proposed network structure with a discussion on research directions for cognitive femtocell architecture. We also provide experimental results to illustrate a general proof of concept for this new modality.