Distributed algorithms for spectrum access in cognitive radio relay networks

Manohar Shamaiah, Sang Hyun Lee, Sriram Vishwanath, Haris Vikalo

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)


We develop distributed algorithms for efficient spectrum access strategies in cognitive radio relay networks. In our setup, primary users permit secondary users access to the resource (spectrum) as long as they consent to aiding the primary users as relays in addition to transmitting their own data. Given a pool of primary and secondary users, we desire to optimize overall network utility by determining the best configuration/pairing of secondary users with primary users. This optimization can be stated in a form similar to the maximum weighted matching problem. Given such formulation, we develop an algorithm based on affinity propagation technique that is completely distributed in its structure. We demonstrate the convergence of the developed algorithm and show that it performs close to the optimal centralized scheme.

Original languageEnglish
Article number6331685
Pages (from-to)1947-1957
Number of pages11
JournalIEEE Journal on Selected Areas in Communications
Issue number10
Publication statusPublished - 2012
Externally publishedYes


  • Cognitive radios
  • Distributed algorithms
  • Message-passing algorithms
  • Spectrum access strategy

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


Dive into the research topics of 'Distributed algorithms for spectrum access in cognitive radio relay networks'. Together they form a unique fingerprint.

Cite this