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Wireless Networks
Erschienen in: Wireless Networks 2/2011

01.02.2011

Application layer QoS optimization for multimedia transmission over cognitive radio networks

verfasst von: F. Richard Yu, Bo Sun, Vikram Krishnamurthy, Saqib Ali

Erschienen in: Wireless Networks | Ausgabe 2/2011

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Abstract

In cognitive radio (CR) networks, the perceived reduction of application layer quality of service (QoS), such as multimedia distortion, by secondary users may impede the success of CR technologies. Most previous work in CR networks ignores application layer QoS. In this paper we take an integrated design approach to jointly optimize multimedia intra refreshing rate, an application layer parameter, together with access strategy, and spectrum sensing for multimedia transmission in a CR system with time varying wireless channels. Primary network usage and channel gain are modeled as a finite state Markov process. With channel sensing and channel state information errors, the system state cannot be directly observed. We formulate the QoS optimization problem as a partially observable Markov decision process (POMDP). A low complexity dynamic programming framework is presented to obtain the optimal policy. Simulation results show the effectiveness of the proposed scheme.
Vorheriger Artikel A scalable distributed dynamic address allocation protocol for ad-hoc networks
Nächster Artikel Constrained multiple deployment problem in wireless sensor networks with guaranteed lifetimes

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Metadaten
Titel
Application layer QoS optimization for multimedia transmission over cognitive radio networks
verfasst von
F. Richard Yu
Bo Sun
Vikram Krishnamurthy
Saqib Ali
Publikationsdatum
01.02.2011
Verlag
Springer US
Erschienen in
Wireless Networks / Ausgabe 2/2011
Print ISSN: 1022-0038
Elektronische ISSN: 1572-8196
DOI
https://doi.org/10.1007/s11276-010-0285-8

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