Conference paper
Cognitive Radio MAC Protocol for WLAN
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.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2008 |
| Pages: | 1-6 |
| Proceedings: | 2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications |
| ISBN: | 142442643X , 142442643x , 9781424426430 , 1424426448 and 9781424426447 |
| Types: | Conference paper |
| DOI: | 10.1109/PIMRC.2008.4699678 |
Access protocols C-CSMA-CA Chromium Degradation Delay Licenses MAC protocol Media Access Protocol Multiaccess communication Throughput Wireless LAN access protocols basic service set carrier sense multiple access cognitive radio distributed cooperative outband sensing media access protocol queueing theory queuing delay station-based dynamic resource selection wireless LAN
