Cross-layer QoS control for video communications over wireless ad hoc networks

Qi Qu, Yong Pei, James W. Modestino, Xusheng Tian, Bin Wang

Research output: Contribution to journalArticle

20 Scopus citations

Abstract

Assuming a wireless ad hoc network consisting of n 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.

Original languageEnglish (US)
Pages (from-to)743-756
Number of pages14
JournalEurasip Journal on Wireless Communications and Networking
Volume2005
Issue number5
DOIs
StatePublished - Dec 1 2005

Keywords

  • Ad hoc
  • Effective transmission rate
  • Joint sourcechannel coding
  • Packet delay
  • Throughput capacity
  • Video transmission

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications
  • Media Technology

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