| Video Transmission over Wireless Channels |
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| 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., 2005) 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.
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Received: 04 December 2005
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doi: 10.1109/TNET.2002.801419
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