Low-complexity centralized joint power and admission control in cognitive radio networks
IEEE Communications Letters
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
Optimization of OFDMA-based cellular cognitive radio networks
IEEE Transactions on Communications
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Hybrid inter-sector coordinated multi-point transmission scheme
Proceedings of the 5th International Conference on Ubiquitous Information Management and Communication
Partial information relaying with multiple relays and destination nodes
Proceedings of the 5th International Conference on Ubiquitous Information Management and Communication
Joint sensing period and transmission time optimization for energy-constrained cognitive radios
EURASIP Journal on Wireless Communications and Networking
COMAS: a cooperative multiagent architecture for spectrum sharing
EURASIP Journal on Wireless Communications and Networking
Outage analysis in presence of correlated interferers in a cognitive radio CDMA network
International Journal of Communication Networks and Distributed Systems
IEEE/ACM Transactions on Networking (TON)
Balancing reliability and utilization in dynamic spectrum access
IEEE/ACM Transactions on Networking (TON)
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We investigate the dynamic spectrum sharing problem among primary and secondary users in a cognitive radio network. We consider the scenario where primary users exhibit on-off behavior and secondary users are able to dynamically measure/estimate sum interference from primary users at their receiving ends. For such a scenario, we solve the problem of fair spectrum sharing among secondary users subject to their QoS constraints (in terms of minimum SINR and transmission rate) and interference constraints for primary users. Since tracking channel gains instantaneously for dynamic spectrum allocation may be very difficult in practice, we consider the case where only mean channel gains averaged over short-term fading are available. Under such scenarios, we derive outage probabilities for secondary users and interference constraint violation probabilities for primary users. Based on the analysis, we develop a complete framework to perform joint admission control and rate/power allocation for secondary users such that both QoS and interference constraints are only violated within desired limits. Throughput performance of primary and secondary networks is investigated via extensive numerical analysis considering different levels of implementation complexity due to channel estimation.