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Wireless Networks
Erschienen in: Wireless Networks 5/2011

01.07.2011

Analysis and optimization of a cross-layer adaptation mechanism for real-time applications in wireless networks

verfasst von: Dionysia Triantafyllopoulou, Nikos Passas, Evangelos Zervas, Lazaros Merakos

Erschienen in: Wireless Networks | Ausgabe 5/2011

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Abstract

The theoretical analysis of a cross-layer mechanism for improving the quality of service of real-time applications in wireless networks is presented. The mechanism coordinates adaptations of the modulation order at the Physical layer and the media encoding mode at the Application layer, to improve packet loss rate, throughput and mean delay. With the use of Continuous Flow Modeling, the system is considered as a “fluid” queue with inflow and outflow rates representing its traffic generation and service rates, respectively. Each data source is modeled as a Markov chain, from the steady-state of which the optimal adaptation thresholds of the cross-layer mechanism are derived. Extensive performance evaluation results show that the optimized operation of the mechanism attains a significant performance improvement compared to both the sub-optimal case, and a legacy system, which adjusts the modulation order and encoding mode separately and independently of each other.
Vorheriger Artikel On the reliability and performance of real-time one-hop broadcast MANETs
Nächster Artikel Spectrum auction with interference constraint for cognitive radio networks with multiple primary and secondary users

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Metadaten
Titel
Analysis and optimization of a cross-layer adaptation mechanism for real-time applications in wireless networks
verfasst von
Dionysia Triantafyllopoulou
Nikos Passas
Evangelos Zervas
Lazaros Merakos
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/s11276-011-0352-9

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