| Autor: |
Ji, Xin, Pollin, Sofie, Lenoir, Gregory, Lafruit, Gauthier, Dejonghe, Antoine, Catthoor, Francky |
| Zdroj: |
Journal of Zhejiang University: Science A; Jan2006 Supplement, Vol. 7, p151-158, 8p |
| Abstrakt: |
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 an inter-user quality variation reductions of as much as 10 dB PSNR, without affecting the overall energy consumption requirements. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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