Auction-based spectrum sharing
Mobile Networks and Applications
NeXt generation/dynamic spectrum access/cognitive radio wireless networks: a survey
Computer Networks: The International Journal of Computer and Telecommunications Networking
Geometric programming for communication systems
Communications and Information Theory
Power control in cognitive radio networks: how to cross a multi-lane highway
IEEE Journal on Selected Areas in Communications - Special issue on stochastic geometry and random graphs for the analysis and designof wireless networks
Proactive detection of spectrum opportunities in primary systems with power control
IEEE Transactions on Wireless Communications
A Decision-Theoretic Framework for Opportunistic Spectrum Access
IEEE Wireless Communications
IEEE Transactions on Wireless Communications
Power Control By Geometric Programming
IEEE Transactions on Wireless Communications
Joint power control and beamforming for cognitive radio networks
IEEE Transactions on Wireless Communications
IEEE Journal on Selected Areas in Communications
Distributed interference compensation for wireless networks
IEEE Journal on Selected Areas in Communications
A framework for uplink power control in cellular radio systems
IEEE Journal on Selected Areas in Communications
Proceedings of the 5th International Conference on Ubiquitous Information Management and Communication
International Journal of Communication Systems
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We venture beyond the "listen-before-talk" strategy that is common in many traditional cognitive radio access schemes. We exploit the bi-directional nature of most primary communication systems. By intelligently choosing their transmission parameters based on the observation of primary user (PU) communications, secondary users (SUs) in a cognitive network can achieve higher spectrum usage while limiting their interference to the PU. Specifically, we propose that the SUs listen to the PU's feedback channel to assess their interference on the primary receiver (PU-Rx), and adjust radio power accordingly to satisfy the PU's interference constraint. We investigate both centralized and distributed power control algorithms without active PU cooperation. We show that the PU feedback information inherent in many two-way primary systems can be used as important coordination signal among multiple SUs to distributively achieve a joint performance guarantee on the primary receiver's quality of service.