Retransmission Scheduling in Layered Video Caches
Key: ZSS02-1
Author: Michael Zink, Jens Schmitt, Ralf Steinmetz
Date: April 2002
Kind: In proceedings
Publisher: IEEE
Book title: Proceedings of IEEE International Conference on Communications 2002 (ICC 2002), New York, USA
Abstract: In contrast to classical assumptions in Video on Demand (VoD) research, the main requirements for VoD in the Internet are adaptiveness, support of heterogeneity, and last not least high scalability. Hierarchically layered video encoding is particularly well suited to deal with adaptiveness and heterogeneity support for video streaming. A distributed caching architecture is key to a scalable VoD solution in the Internet. Thus, the combination of caching and layered video streaming is promising for an Internet VoD system, yet, requires thoughts about some new issues and challenges. In this paper, we investigate one particular of these issues: how to deal with retransmissions of missing segments for a cached layered video in order to meet users' demands to watch high quality video with relatively little quality variations. We devise a suite of fairly simple retransmission scheduling algorithms and compare these against existing ones by simulative experiments.

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