Enhancing VoWLAN Service Through Adaptive Voice Coder

Adlen Ksentini 1
1 DIONYSOS - Dependability Interoperability and perfOrmance aNalYsiS Of networkS
Inria Rennes – Bretagne Atlantique , IRISA-D2 - RÉSEAUX, TÉLÉCOMMUNICATION ET SERVICES
Abstract : For the last decade, Voice Over IP (VoIP) has been a great concern leading to consider it as the "killing application". Deploying such applications in the Wireless Local Area Networks (WLAN) is still in progress, and further investigations are needed. Unlike wired networks, wireless networks such as WLAN, have their own characteristics, which introduce many challenges that prohibit the support of real-time applications like VoIP. To support VoWLAN, it is commonly accepted that cross-layer cooperation is required. It involves an exchange of information between the MAC layer as well as the application layer aiming at better adapting the voice coder to the network conditions. In this paper, we propose to adapt the voice coder's rate regarding the MAC layer feedbacks that reflects the network state in term of network load and physical rate. Simulation results show that compared to the case when using only G.711 coder, our cross-layer solution ensures high VoIP quality by maintaining low end-to-end delays and minimum PLR (Packet Loss Rate).
Type de document :
Communication dans un congrès
IEEE. International Symposium Symposium on Computers and Communications (ISCC), Jul 2009, Soussa, Tunisia. 2009
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https://hal.inria.fr/hal-00789328
Contributeur : Adlen Ksentini <>
Soumis le : lundi 18 février 2013 - 09:17:20
Dernière modification le : mercredi 16 mai 2018 - 11:23:18

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  • HAL Id : hal-00789328, version 1

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Adlen Ksentini. Enhancing VoWLAN Service Through Adaptive Voice Coder. IEEE. International Symposium Symposium on Computers and Communications (ISCC), Jul 2009, Soussa, Tunisia. 2009. 〈hal-00789328〉

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