Spectrum availability model of secondary users in cognitive radio networks

Nariman Rahimian, Costas N. Georghiades, Hasari Celebi, Khalid A. Qaraqe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Cognitive Radio systems are a promising solution to the spectrum scarcity problem, but precise modeling of spectrum utilization is vital to the analysis and design of such systems. In this paper, we mathematically derive the Probability Mass Function (PMF) of the fraction of available subcarriers for the secondary users in an OFDMA based cognitive radio system for different requesting distributions. The PMF of the total number of requested subcarriers from all primary users is derived and the effect of the requesting distribution on the asymptotic spectrum availability for secondary users is studied. It is shown that if a requesting distribution is undesired, providing more subcarriers will not increase the spectrum availability for the secondary network.

Original languageEnglish
Title of host publicationIWCMC 2012 - 8th International Wireless Communications and Mobile Computing Conference
Pages360-365
Number of pages6
DOIs
Publication statusPublished - 22 Nov 2012
Event8th IEEE International Wireless Communications and Mobile Computing Conference, IWCMC 2012 - Limassol, Cyprus
Duration: 27 Aug 201231 Aug 2012

Publication series

NameIWCMC 2012 - 8th International Wireless Communications and Mobile Computing Conference

Other

Other8th IEEE International Wireless Communications and Mobile Computing Conference, IWCMC 2012
CountryCyprus
CityLimassol
Period27/8/1231/8/12

Keywords

  • Cognitive radio
  • OFDMA
  • dynamic spectrum access
  • spectrum availability

ASJC Scopus subject areas

  • Computer Networks and Communications

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  • Cite this

    Rahimian, N., Georghiades, C. N., Celebi, H., & Qaraqe, K. A. (2012). Spectrum availability model of secondary users in cognitive radio networks. In IWCMC 2012 - 8th International Wireless Communications and Mobile Computing Conference (pp. 360-365). [6314231] (IWCMC 2012 - 8th International Wireless Communications and Mobile Computing Conference). https://doi.org/10.1109/IWCMC.2012.6314231