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Wireless Networks
Erschienen in: Wireless Networks 5/2011

01.07.2011

F2-MAC: an efficient channel sensing and access mechanism for cognitive radio networks

verfasst von: Hsi-Lu Chao, TakChon Lou, Shuhua Jiang

Erschienen in: Wireless Networks | Ausgabe 5/2011

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Abstract

One of the most challenging issues in cognitive radio (CR) systems is channel sensing and accessing. In this paper, a CR channel access mechanism is proposed. The mechanism consists of two phases: fast channel accessing and proactive channel vacating. In fast channel accessing, a pair of CR users time-efficiently searches an available channel to deliver data. In proactive channel vacating, a pair of CR users periodically makes channel access opportunities to primary users (PUs) and vacates the occupied channel as quick as possible. We utilize the concept of channel hopping to reduce the average channel searching time. Furthermore, our vacating mechanism allows CR users to create opportunities for PUs to claim the spectrum and thus minimize the caused interference to PUs. We evaluate the performance of our approach through a two-dimensional Markov chain model as well as simulations. The performance study indicates that the proposed protocol achieves low channel searching time, high throughput, and fairness.
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Metadaten
Titel
F2-MAC: an efficient channel sensing and access mechanism for cognitive radio networks
verfasst von
Hsi-Lu Chao
TakChon Lou
Shuhua Jiang
Publikationsdatum
01.07.2011
Verlag
Springer US
Erschienen in
Wireless Networks / Ausgabe 5/2011
Print ISSN: 1022-0038
Elektronische ISSN: 1572-8196
DOI
https://doi.org/10.1007/s11276-010-0316-5

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