Open Access

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

  • Mohammad Hossein Manshaei1Email author,
  • Thierry Turletti1 and
  • Thomas Guionnet2
EURASIP Journal on Wireless Communications and Networking20052005:375340

https://doi.org/10.1155/WCN.2005.757

Received: 15 June 2004

Published: 12 December 2005

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.

Keywords

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

Authors’ Affiliations

(1)
Planète Project, INRIA
(2)
Temics Project, IRISA-INRIA

Copyright

© 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.