Aarhus Universitets segl

Cognitive radio MAC protocol for WLAN

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  • Qi Zhang
  • Frank Hanns Paul Fitzek, Antennas, propagation and radio networking, Danmark
  • V.B. Iversen, Danmark
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
TitelIEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications, 2008
Sider1 - 6
ISBN (trykt)978-1-4244-2643-0
ISBN (Elektronisk)978-1-4244-2644-7
StatusUdgivet - 2008
Eksternt udgivetJa
BegivenhedIEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications - Cannes, Frankrig
Varighed: 15 sep. 200818 sep. 2008


KonferenceIEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications
SerietitelI E E E International Symposium Personal, Indoor and Mobile Radio Communications

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