Skip to content


  • Research Article
  • Open Access

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

  • 1Email author,
  • 1 and
  • 2
EURASIP Journal on Wireless Communications and Networking20052005:375340

  • Received: 15 June 2004
  • Published:


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.


  • ad hoc networks
  • cross-layer optimization
  • IEEE 802.11 wireless LAN
  • MANETs
  • mode selection algorithms

Authors’ Affiliations

Planète Project, INRIA, 2004 Route des Lucioles, B.P. 93, 06902 Sophia Antipolis Cedex, France
Temics Project, IRISA-INRIA, Campus de Beaulieu, Rennes Cedex, 35042, France


© Mohammad Hossein Manshaei et al. 2005

This article is published under license to BioMed Central Ltd. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.