Title :
Primary User Enters the Game: Performance of Dynamic Spectrum Leasing in Cognitive Radio Networks
Author :
Vazquez-Vilar, Gonzalo ; Mosquera, Carlos ; Jayaweera, Sudharman K.
Author_Institution :
Dept. de Teor. de la Senal y Comun., Univ. de Vigo, Vigo, Spain
fDate :
12/1/2010 12:00:00 AM
Abstract :
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.
Keywords :
cognitive radio; game theory; radio spectrum management; radiofrequency interference; DSS; cognitive radio networks; dynamic environment DSL based schemes; dynamic spectrum leasing; dynamic spectrum sharing; fixed interference constraints; game theory; multiuser sum-rate; secondary interference; secondary transmitters; Cognitive radio; DSL; Games; Interference; Maximum likelihood decoding; Measurement; Receivers; Cognitive radio; DSL; dynamic spectrum leasing; dynamic spectrum sharing; game theory; multiuser decoding;
Journal_Title :
Wireless Communications, IEEE Transactions on
DOI :
10.1109/TWC.2010.101310.101056