Collaboration

Push Popular Segments in P2P VoD System: Possibility and Design

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Executive Summary

Video-on-Demand (VoD) services have attracted a lot of attentions in recent years. Measurement studies show that VCR (Video Cassette Recorder) operations, such as pause, rewind, and fast forward/backward, influence the pattern of the access to video segments and viewer(session) sojourn time. Moreover, some VCR features (e.g., bookmarking) newly proposed can further magnify such effects. This paper analyzes the possibility to discern popular segments (highlights) from normal non-popular segments (normal-content) and how to reduce playback jitter in P2P streaming by leveraging this difference in segment popularity. The authors' contributions are two folds. First, a user playback model is presented, based on which they come to an affirmative conclusion on the possibility aforementioned. Besides, they also examine a real workload trace to validate the model and conclusions.

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