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In this paper, the authors propose a cross layer optimizer named XLO between scalable video streaming application and IEEE 802.16 MAC layer. The main objective is to allow video streaming application to adapt its parameters according to 802.16 MAC layer conditions and resource availability. XLO uses the existing service flow management messages exchanged between Base Station (BS) and Subscriber Station (SS) and makes them available to the video streaming application via a specific XLO interface. They implemented the XLO in the QualNet simulator and performed extensive simulations using a personalized scalable video traffic generator, capable of streaming video with different data rates.
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