Title :
Complexity analysis of spectrum access strategies with channel aggregation in CR networks
Author :
Balapuwaduge, Indika A. M. ; Lei Jiao ; Li, Frank Y.
Author_Institution :
Dept. of Inf. & Commun. Technol., Univ. of Agder (UiA), Grimstad, Norway
Abstract :
Cognitive radio has been introduced to increase spectrum utilization efficiency. To further improve bandwidth utilization of cognitive radio users, channel aggregation (CA) techniques can be adopted for spectrum access. In this paper, we analyze the complexity of three CA strategies, in terms of required amount of handshakes for channel adaptation due to primary and secondary user activities. Continuous time Markov chain models are developed to evaluate the total number of handshakes required per unit time by different CA strategies and the analytical results are validated by simulations. Numerical results reveal that the complexity of CA strategies depends on the capability and the design principle of spectrum adaptation.
Keywords :
Markov processes; cognitive radio; computational complexity; CR networks; bandwidth utilization improvement; channel adaptation; channel aggregation technique; cognitive radio users; complexity analysis; continuous-time Markov chain model; primary user activity; secondary user activity; spectrum access strategy; spectrum adaptation design principle; spectrum utilization efficiency;
Conference_Titel :
Global Communications Conference (GLOBECOM), 2012 IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4673-0920-2
Electronic_ISBN :
1930-529X
DOI :
10.1109/GLOCOM.2012.6503292
