A survey on spectrum management in cognitive radio networks

Ian F. Akyildiz, Won Yeol Lee, Mehmet C. Vuran, Shantidev Mohanty

Research output: Contribution to journalArticlepeer-review

1388 Scopus citations


Cognitive radio networks will provide high bandwidth to mobile users via heterogeneous wireless architectures and dynamic spectrum access techniques. However, CR networks impose challenges due to the fluctuating nature of the available spectrum, as well as the diverse QoS requirements of various applications. Spectrum management functions can address these challenges for the realization of this new network paradigm. To provide a better understanding of CR networks, this article presents recent developments and open research issues in spectrum management in CR networks. More specifically, the discussion is focused on the development of CR networks that require no modification of existing networks. First, a brief overview of cognitive radio and the CR network architecture is provided. Then four main challenges of spectrum management are discussed: spectrum sensing, spectrum decision, spectrum sharing, and spectrum mobility.

Original languageEnglish (US)
Pages (from-to)40-48
Number of pages9
JournalIEEE Communications Magazine
Issue number4
StatePublished - Apr 2008
Externally publishedYes

ASJC Scopus subject areas

  • Computer Science Applications
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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