Resource Allocation and Outage Analysis for an Adaptive Cognitive Two-Way Relay Network

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17 Scopus citations


In this paper, an adaptive two-way relay cooperation scheme is studied for multiple-relay cognitive radio networks to improve the performance of secondary transmissions. The power allocation and relay selection schemes are derived to minimize the secondary outage probability where only statistical channel information is needed. Exact closed-form expressions for secondary outage probability are derived under a constraint on the quality of service of primary transmissions in terms of the required primary outage probability. To better understand the impact of primary user interference on secondary transmissions, we further investigate the asymptotic behaviors of the secondary relay network, including power allocation and outage probability, when the primary signal-to-noise ratio goes to infinity. Simulation results are provided to illustrate the performance of the proposed schemes.

Original languageEnglish (US)
Article number7929301
Pages (from-to)4727-4737
Number of pages11
JournalIEEE Transactions on Wireless Communications
Issue number7
StatePublished - Jul 2017


  • Two-way relay
  • cognitive radio networks
  • outage probability
  • power allocation
  • relay selection

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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