Opportunistic channel selection strategy for better QoS in cooperative networks with cognitive radio capabilities

Ala Al-Fuqaha, Bilal Khan, Ammar Rayes, Mohsen Guizani, Osama Awwad, Ghassen Ben Brahim

Research output: Contribution to journalArticlepeer-review

48 Scopus citations


Mission-oriented MANETs are characterized by implicit common group objectives which make inter-node cooperation both logical and feasible. We propose new techniques to leverage two optimizations for cognitive radio networks that are specific to such contexts: opportunistic channel selection and cooperative mobility. We present a new formal model for MANETs consisting of cognitive radio capable nodes that are willing to be moved (at a cost). We develop an effective decentralized algorithm for mobility planning, and powerful new filtering and fuzzy based techniques for both channel estimation and channel selection. Our experiments are compelling and demonstrate that the communications infrastructure-specifically, connection bit error rates-can be significantly improved by leveraging our proposed techniques. In addition, we find that these cooperative/opportunistic optimization spaces do not trade-off significantly with one another, and thus can be used simultaneously to build superior hybrid schemes. Our results have significant applications in high-performance mission-oriented MANETs, such as battlefield communications and domestic response & rescue missions.

Original languageEnglish (US)
Pages (from-to)156-167
Number of pages12
JournalIEEE Journal on Selected Areas in Communications
Issue number1
StatePublished - Jan 2008
Externally publishedYes


  • Ad-hoc network
  • Cognitive radio
  • Cooperation
  • Filter
  • Fuzzy logic
  • Quality of service

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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