Using topology information for quality-aware Peer-to-Peer multilayer video streaming

摘要

Due to increasing bandwidth capacities, the Internet has become a viable transport medium for a (live) video. Often, delivery of video streams relies on the client–server paradigm and therefore exhibits limited scalability. The Peer-to-Peer (P2P) network model is an attractive and scalable candidate to stream video content to end users. However, these P2P frameworks typically operate in a network agnostic mode. Introducing network topology information into these P2P frameworks offers opportunities to enhance the performance.In this paper, we introduce a model to include network information when streaming a (multilayered) video in P2P frameworks. An important metric for video stream providers is the content quality perceived by end users. The optimization studied here aims at maximizing the number of users receiving a high quality video.The paper addresses the optimization problem seen from the stream provider's viewpoint, having access to network topology information. An exact optimization approach is presented for benchmarking purposes and a heuristic approach to cope with realistic network sizes. In addition, we present an approach to decide the deployment location of peering functionality. The results show that our strategy significantly decreases the fraction of destinations receiving only the base layer, and by introducing extra peering functionality, network capacities are used more efficiently. Copyright © 2015 John Wiley & Sons, Ltd.