A study on the usage of cross-layer power control and forward error correction for embedded video transmission over wireless links

  • Authors:

  • Fabrizio Granelli;Cristina E. Costa;Aggelos K. Katsaggelos

  • Affiliations:

  • Department of Information and Communication Technology, University of Trento, Povo, Trento, Italy;CREATE-NET International Research Center, Trento, Italy;Electrical Engineering and Computer Science Department, Northwestern University, Evanston, IL

  • Venue:
  • Advances in Multimedia
  • Year:
  • 2007

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Abstract

Cross-layering is a design paradigm for overcoming the limitations deriving from the ISO/OSI layering principle, thus improving the performance of communications in specific scenarios, such as wireless multimedia communications. However, most available solutions are based on empirical considerations, and do not provide a theoretical background supporting such approaches. The paper aims at providing an analytical framework for the study of single-hop video delivery over a wireless link, enabling cross-layer interactions for performance optimization using power control and FEC and providing a useful tool to determine the potential gain deriving from the employment of such design paradigm. The analysis is performed using rate-distortion information of an embedded video bitstream jointly with a Lagrangian power minimization approach. Simulation results underline that cross-layering can provide relevant improvement in specific environments and that the proposed approach is able to capitalize on the advantage deriving from its deployment.