Energy-efficient bandwidth allocation for multiuser scalable video streaming over WLAN

Authors:
Xin Ji;Sofie Pollin;Gauthier Lafruit;Iole Moccagatta;Antoine Dejonghe;Francky Catthoor
Affiliations:
Katholieke Universiteit Leuven, Leuven, Belgium and IMEC, Leuven, Belgium and Interdisciplinary Institute for Broadband Technology, Ghent University, Gent, Belgium;Katholieke Universiteit Leuven, Leuven, Belgium and IMEC, Leuven, Belgium and Interdisciplinary Institute for Broadband Technology, Ghent University, Gent, Belgium and UC Berkeley, CA;IMEC, Leuven, Belgium;IMEC, Leuven, Belgium;IMEC, Leuven, Belgium and Interdisciplinary Institute for Broadband Technology, Ghent University, Gent, Belgium;Katholieke Universiteit Leuven, Leuven, Belgium and IMEC, Leuven, Belgium
Venue:
EURASIP Journal on Wireless Communications and Networking - Multimedia over Wireless Networks
Year:
2008

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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.