Open Access

Cross-Layer QoS Control for Video Communications over Wireless Ad Hoc Networks

EURASIP Journal on Wireless Communications and Networking20052005:412475

https://doi.org/10.1155/WCN.2005.743

Received: 21 June 2004

Published: 12 December 2005

Abstract

Assuming a wireless ad hoc network consisting of homogeneous video users with each of them also serving as a possible relay node for other users, we propose a cross-layer rate-control scheme based on an analytical study of how the effective video transmission rate is affected by the prevailing operating parameters, such as the interference environment, the number of transmission hops to a destination, and the packet loss rate. Furthermore, in order to provide error-resilient video delivery over such wireless ad hoc networks, a cross-layer joint source-channel coding (JSCC) approach, to be used in conjunction with rate-control, is proposed and investigated. This approach attempts to optimally apply the appropriate channel coding rate given the constraints imposed by the effective transmission rate obtained from the proposed rate-control scheme, the allowable real-time video play-out delay, and the prevailing channel conditions. Simulation results are provided which demonstrate the effectiveness of the proposed cross-layer combined rate-control and JSCC approach.

Keywords

ad hoc video transmission throughput capacity effective transmission rate packet delay joint source-channel coding

Authors’ Affiliations

(1)
Department of Electrical and Computer Engineering, College of Engineering, University of Miami
(2)
Department of Electrical & Computer Engineering, University of California
(3)
Department of Computer Science & Engineering, College of Engineering & Computer Science, Wright State University

Copyright

© Qi Qu 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.