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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2006, Vol. 7 Issue (Supplement 1): 151-158    DOI: 10.1631/jzus.2006.AS0151
Original Paper     
Multi-user Motion JPEG2000 over wireless LAN: Run-time performance-energy optimization with application-aware cross-layer scheduling
Ji Xin, Pollin Sofie, Lenoir Gregory, Lafruit Gauthier, Dejonghe Antoine, Catthoor Francky
Interuniversity Microelectronics Center, Kapeldreef 75, Leuven 3001, Belgium; Department of Electrical Engineering, K.U.Leuven, ESAT/INSYS, Belgium; Interdisciplinary Institute for Broadband Technology, Gent-Ledeberg B-9050, Belgium
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Abstract  This paper introduces a video application-aware cross-layer framework for joint performance-energy optimization, considering the scenario of multiple users upstreaming real-time Motion JPEG2000 video streams to the access point of a WiFi wireless local area network and extends the PHY-MAC run-time cross-layer scheduling strategy that we introduced in (Mangharam et al., 2005; Pollin et al., in press) to also consider congested network situations where video packets have to be dropped. We show that an optimal solution at PHY-MAC level can be highly suboptimal at application level, and then show that making the cross-layer framework application-aware through a prioritized dropping policy capitalizing on the inherent scalability of Motion JPEG2000 video streams leads to drastic average video quality improvements and inter-user quality variation reductions of as much as 10 dB PSNR, without affecting the overall energy consumption requirements.

Key words： Performance-energy optimization      Application-aware scheduling      Motion JPEG2000      WLAN multi-user transmission     
Received: 04 December 2005     
CLC:  TN919.8  
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Ji Xin
Pollin Sofie
Lenoir Gregory
Lafruit Gauthier
Dejonghe Antoine
Catthoor Francky
Cite this article:

Ji Xin, Pollin Sofie, Lenoir Gregory, Lafruit Gauthier, Dejonghe Antoine, Catthoor Francky. Multi-user Motion JPEG2000 over wireless LAN: Run-time performance-energy optimization with application-aware cross-layer scheduling. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2006, 7(Supplement 1): 151-158.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2006.AS0151     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2006/V7/ISupplement 1/151

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