MAC protocol for opportunistic cognitive radio networks with soft guarantees

Haythem A. Bany Salameh, Marwan M Krunz, Ossama Younis

Research output: Contribution to journalArticle

129 Citations (Scopus)

Abstract

Cognitive radio (CR) is the key enabling technology for an efficient dynamic spectrum access. It aims at exploiting an underutilized licensed spectrum by enabling opportunistic communications for unlicensed users. In this work, we first develop a distributed cognitive radio MAC (COMAC) protocol that enables unlicensed users to dynamically utilize the spectrum while limiting the interference on primary (PR) users. The main novelty in COMAC lies in not assuming a predefined CR-to-PR power mask and not requiring active coordination with PR users. COMAC provides a statistical performance guarantee for PR users by limiting the fraction of the time during which the PR users' reception is negatively affected by CR transmissions. To provide such a guarantee, we develop probabilistic models for the PR-to-PR and the PR-to-CR interference under a Rayleigh fading channel model. From these models, we derive closed-form expressions for the mean and variance of interference. Empirical results show that the distribution of the interference is approximately lognormal. Based on the developed interference models, we derive a closed-form expression for the maximum allowable power for a CR transmission. We extend the min-hop routing to exploit the available channel information for improving the perceived throughput. Our simulation results indicate that COMAC satisfies its target soft guarantees under different traffic loads and arbitrary user deployment scenarios. Results also show that exploiting the available channel information for the routing decisions can improve the end-to-end throughput of the CR network (CRN).

Original languageEnglish (US)
Article number4752837
Pages (from-to)1339-1352
Number of pages14
JournalIEEE Transactions on Mobile Computing
Volume8
Issue number10
DOIs
StatePublished - Oct 2009

Fingerprint

Cognitive radio
Radio transmission
Throughput
Radio interference
Rayleigh fading
Telecommunication traffic
Fading channels
Masks
Communication

Keywords

  • Interference
  • Opportunistic access
  • Outage probability
  • Power mask

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications
  • Software

Cite this

MAC protocol for opportunistic cognitive radio networks with soft guarantees. / Bany Salameh, Haythem A.; Krunz, Marwan M; Younis, Ossama.

In: IEEE Transactions on Mobile Computing, Vol. 8, No. 10, 4752837, 10.2009, p. 1339-1352.

Research output: Contribution to journalArticle

Bany Salameh, Haythem A. ; Krunz, Marwan M ; Younis, Ossama. / MAC protocol for opportunistic cognitive radio networks with soft guarantees. In: IEEE Transactions on Mobile Computing. 2009 ; Vol. 8, No. 10. pp. 1339-1352.
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