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 and Affiliations

1. Katholieke Universiteit Leuven, Leuven, 3000, Belgium

   Xin Ji, Sofie Pollin & Francky Catthoor

2. IMEC, Kapeldreef 75, Leuven, 3001, Belgium

   Xin Ji, Sofie Pollin, Gauthier Lafruit, Iole Moccagatta, Antoine Dejonghe & Francky Catthoor

3. Interdisciplinary Institute for Broadband Technology (IBBT), Ghent University, Gent, 9000, Belgium

   Xin Ji, Sofie Pollin & Antoine Dejonghe

4. UC Berkeley, CA, 94720, USA

   Sofie Pollin

Corresponding author

Correspondence toXin Ji.

Open Access This article is distributed under the terms of the Creative Commons Attribution 2.0 International License (https://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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