Multiuser Detection
Elements of Information Theory (Wiley Series in Telecommunications and Signal Processing)
Elements of Information Theory (Wiley Series in Telecommunications and Signal Processing)
Stackelberg game for utility-based cooperative cognitiveradio networks
Proceedings of the tenth ACM international symposium on Mobile ad hoc networking and computing
Dynamic spectrum leasing in cognitive radio networks via primary-secondary user power control games
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Spectrum Leasing to Cooperating Secondary Ad Hoc Networks
IEEE Journal on Selected Areas in Communications
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Dynamic spectrum leasing (DSL) is one of the schemes proposed for dynamic spectrum sharing (DSS) in cognitive radio networks. In DSL, spectrum owners, denoted as primary users, dynamically adjust the amount of secondary interference they are willing to tolerate in response to the demand from secondary transmitters. In this correspondence we investigate how much can be gained by primary users if this limited interaction with secondary system is allowed, compared to a scheme in which the interference cap allowed by primary users is fixed a priori by a regulatory authority. To that end, we define performance metrics for both primary and secondary systems based on the theoretically achievable multiuser sum-rate of the secondary system and analyze both schemes' behavior with respect to different system parameters. This analysis shows that (i) in dynamic environments DSL based schemes may present an important advantage over other schemes with fixed interference constraints, and (ii) DSL schemes are robust against inaccurate a priori information that may degrade system performance.