Open Access

Energy-Efficient Bandwidth Allocation for Multiuser Scalable Video Streaming over WLAN

  • Xin Ji1, 2, 3Email author,
  • Sofie Pollin1, 2, 3, 4,
  • Gauthier Lafruit2,
  • Iole Moccagatta2,
  • Antoine Dejonghe2, 3 and
  • Francky Catthoor1, 2
EURASIP Journal on Wireless Communications and Networking20072008:219570

DOI: 10.1155/2008/219570

Received: 27 February 2007

Accepted: 9 October 2007

Published: 5 November 2007

Abstract

We consider the problem of packet scheduling for the transmission of multiple video streams over a wireless local area network (WLAN). A cross-layer optimization framework is proposed to minimize the wireless transceiver energy consumption while meeting the user required visual quality constraints. The framework relies on the IEEE 802.11 standard and on the embedded bitstream structure of the scalable video coding scheme. It integrates an application-level video quality metric as QoS constraint (instead of a communication layer quality metric) with energy consumption optimization through link layer scaling and sleeping. Both energy minimization and min-max energy optimization strategies are discussed. Simulation results demonstrate significant energy gains compared to the state-of-the-art approaches.

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Authors’ Affiliations

(1)
Katholieke Universiteit Leuven
(2)
IMEC
(3)
Interdisciplinary Institute for Broadband Technology (IBBT), Ghent University
(4)
UC Berkeley

Copyright

© Xin Ji et al. 2008

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.