Proceedings of the 7th ACM international symposium on Mobility management and wireless access
Comprehensive Capacity Ensured Distributed Binary Power Allocation in Dense Cognitive Networks
Journal of Network and Systems Management
Long term fair scheduling in a cognitive wireless network with spectrum underlay
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Distributed admission and power control for cognitive radios in spectrum underlay networks
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Centralized and distributed optimization of ad-hoc cognitive radio network
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Perturbation analysis for spectrum sharing in cognitive radio networks
IEEE Transactions on Wireless Communications
A dynamic spectrum leasing (DSL) framework for spectrum sharing in cognitive radio networks
Asilomar'09 Proceedings of the 43rd Asilomar conference on Signals, systems and computers
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Probabilistic coexistence and throughput of cognitive dual-polarized networks
EURASIP Journal on Wireless Communications and Networking - Special issue on dynamic spectrum access: from the concept to the implementation
Joint sensing period and transmission time optimization for energy-constrained cognitive radios
EURASIP Journal on Wireless Communications and Networking
Computer Networks: The International Journal of Computer and Telecommunications Networking
Wireless Personal Communications: An International Journal
Computer Networks: The International Journal of Computer and Telecommunications Networking
An adaptive and QoS-based spectrum awareness framework for CR networks
Computer Networks: The International Journal of Computer and Telecommunications Networking
An MMSE Overlay Cognitive Wireless System
International Journal of Interdisciplinary Telecommunications and Networking
Ergodic Sum Rate Maximization for Underlay Spectrum Sharing with Heterogeneous Traffic
Wireless Personal Communications: An International Journal
An MMSE Overlay Cognitive Wireless System
International Journal of Interdisciplinary Telecommunications and Networking
A Survey of Cooperative Games for Cognitive Radio Networks
Wireless Personal Communications: An International Journal
Wireless Personal Communications: An International Journal
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A resource allocation framework is presented for spectrum underlay in cognitive wireless networks. We consider both interference constraints for primary users and quality of service (QoS) constraints for secondary users. Specifically, interference from secondary users to primary users is constrained to be below a tolerable limit. Also, signal to interference plus noise ratio (SINR) of each secondary user is maintained higher than a desired level for QoS insurance. We propose admission control algorithms to be used during high network load conditions which are performed jointly with power control so that QoS requirements of all admitted secondary users are satisfied while keeping the interference to primary users below the tolerable limit. If all secondary users can be supported at minimum rates, we allow them to increase their transmission rates and share the spectrum in a fair manner. We formulate the joint power/rate allocation with proportional and max-min fairness criteria as optimization problems. We show how to transform these optimization problems into a convex form so that their globally optimal solutions can be obtained. Numerical results show that the proposed admission control algorithms achieve performance very close to that of the optimal solution. Also, impacts of different system and QoS parameters on the network performance are investigated for the admission control, and rate/power allocation algorithms under different fairness criteria.