Outage analysis for underlay cognitive networks using incremental regenerative relaying

Kamel Tourki, Khalid Qaraqe, Mohamed Slim Alouini

Research output: Contribution to journalArticle

100 Citations (Scopus)

Abstract

Cooperative relay technology has recently been introduced into cognitive radio (CR) networks to enhance the network capacity, scalability, and reliability of end-to-end communication. In this paper, we investigate an underlay cognitive network where the quality of service (QoS) of the secondary link is maintained by triggering an opportunistic regenerative relaying once it falls under an unacceptable level. Analysis is conducted for two schemes, referred to as the channel-state information (CSI)-based and fault-tolerant schemes, respectively, where different amounts of CSI were considered. We first provide the exact cumulative distribution function (cdf) of the received signal-to-noise ratio (SNR) over each hop with colocated relays. Then, the cdf's are used to determine a very accurate closed-form expression for the outage probability for a transmission rate $R$. In a high-SNR region, a floor of the secondary outage probability occurs, and we derive its corresponding expression. We validate our analysis by showing that the simulation results coincide with our analytical results in Rayleigh fading channels.

Original languageEnglish
Article number6324462
Pages (from-to)721-734
Number of pages14
JournalIEEE Transactions on Vehicular Technology
Volume62
Issue number2
DOIs
Publication statusPublished - 2013

Fingerprint

Outage Probability
Channel state information
Channel State Information
Outages
Relay
Signal to noise ratio
Rayleigh Fading Channel
Cognitive Radio Networks
Cumulative distribution function
Rayleigh fading
Cognitive radio
Fault-tolerant
Fading channels
Quality of Service
Distribution functions
Scalability
Quality of service
Closed-form
Communication
Simulation

Keywords

  • Incremental regenerative relaying
  • outage analysis
  • underlay cognitive networks

ASJC Scopus subject areas

  • Automotive Engineering
  • Aerospace Engineering
  • Computer Networks and Communications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Outage analysis for underlay cognitive networks using incremental regenerative relaying. / Tourki, Kamel; Qaraqe, Khalid; Alouini, Mohamed Slim.

In: IEEE Transactions on Vehicular Technology, Vol. 62, No. 2, 6324462, 2013, p. 721-734.

Research output: Contribution to journalArticle

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