Semantic-aware Link Layer Scheduling of MPEG-4 Video Streams in Wireless Systems
Jirka Klaue, James Gross, Holger Karl, Adam Wolisz · 2003
Delivering video streams to terminals via a wireless last hop is a challengingtask due to the varying nature of the wireless link. While a common approach suggeststo exploit the variations of the wireless channel, an alternative is to exploitcharacteristics of the video stream to improve the transmission. In this paper weshow how semantic stream variations of MPEG-4 coded video can be used to increasethe number of terminals which can be supported in a wireless cell at a givenminimum video quality. As example system we consider the performance of anOFDM system with different video sources. Simulations show that the number ofsupportable terminals can be increased on average by fifty percent.