An Evaluation of Media-Oriented Rate Selection Algorithm for Multimedia Transmission in MANETs

Mohammad Hossein Manshaei 1, * Thierry Turletti 1 Thomas Guionnet 2
* Corresponding author
1 PLANETE - Protocols and applications for the Internet
Inria Grenoble - Rhône-Alpes, CRISAM - Inria Sophia Antipolis - Méditerranée
2 TEMICS - Digital image processing, modeling and communication
IRISA - Institut de Recherche en Informatique et Systèmes Aléatoires, Inria Rennes – Bretagne Atlantique
Abstract : We focus on the optimization of real-time multimedia transmission over 802.11-based ad hoc networks. In particular, we propose a simple and efficient cross-layer mechanism that considers both the channel conditions and characteristics of the media for dynamically selecting the transmission mode. This mechanism called media-oriented rate selection algorithm (MORSA) targets loss-tolerant applications such as VoD that do not require full reliable transmission. We provide an evaluation of this mechanism for MANETs using simulations with NS and analyze the video quality obtained with a fine-grain scalable video encoder based on a motion-compensated spatiotemporal wavelet transform. Our results show that MORSA achieves up to 4 Mbps increase in throughput and that the routing overhead decreases significantly. Transmission of a sample video flow over an 802.11a wireless channel has been evaluated with MORSA. Important improvement is observed in throughput, latency, and jitter while keeping a good level of video quality.
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Mohammad Hossein Manshaei, Thierry Turletti, Thomas Guionnet. An Evaluation of Media-Oriented Rate Selection Algorithm for Multimedia Transmission in MANETs. EURASIP Journal on Wireless Communications and Networking, SpringerOpen, 2005, 2005 (5), pp.375340. ⟨hal-00784482⟩

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