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Cognitive radio MAC protocol for WLAN

Research output: Contribution to book/anthology/report/proceedingArticle in proceedingsResearchpeer-review

  • Qi Zhang
  • Frank Hanns Paul Fitzek, Antennas, propagation and radio networking, Denmark
  • V.B. Iversen, Denmark
To solve the performance degradation issue in current WLAN caused by the crowded unlicensed spectrum, we propose a cognitive radio (CR) media access protocol, C-CSMA/CA. The basic idea is that with cognitive radio techniques the WLAN devices can not only access the legacy WLAN unlicensed spectrum but opportunistically access any other under-utilized licensed spectrum without a license. The application scenario of C-CSMA/CA is infrastructure BSS (Basic Service Set) WLAN. C-CSMA/CA efficiently exploits the inherent characteristics of CSMA/CA to design distributed cooperative outband sensing to explore spectrum hole; moreover, it designs dual inband sensing scheme to detect primary user appearance. Additionally, C-CSMA/CA has the advantage to effectively solve the cognitive radio self-coexistence issues in the overlapping CR BSSs scenario. It also realizes station-based dynamic resource selection and utilization. It is compatible with any legacy WLAN (BSS) system. We develop and implement the simulation of C-CSMA/CA by OPNET. The simulation results show that C-CSMA/CA highly enhances throughput and reduces the queuing delay and media access delay
Original languageEnglish
Title of host publicationIEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, 2008
Publication year2008
Pages1 - 6
ISBN (print)978-1-4244-2643-0
ISBN (Electronic)978-1-4244-2644-7
Publication statusPublished - 2008
Externally publishedYes
EventIEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications - Cannes, France
Duration: 15 Sept 200818 Sept 2008


ConferenceIEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications
SeriesI E E E International Symposium Personal, Indoor and Mobile Radio Communications

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