On the minimum delay peer-to-peer video streaming: how realtime can it be?
Proceedings of the 15th international conference on Multimedia
Inferring Network-Wide Quality in P2P Live Streaming Systems
IEEE Journal on Selected Areas in Communications
Elite: differentiating the playback lag for peer-assisted live video streaming
Proceedings of the 2012 IEEE 20th International Workshop on Quality of Service
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P2P live streaming systems suffer a lot from long playback lag in lag-sensitive scenarios. In this paper, we propose a new approach to reducing the playback lag in P2P live streaming systems. According to measurement studies, there exist a certain amount of active peers, who stay longer and contribute more bandwidth than other peers. Inspired by this, we propose a tiered overlay design, in which peers are organized into three tiers based on their degrees of activity. We develop a set of algorithms to evaluate the peers' degrees of activity. Specifically, the backbone of the overlay consists of the peers with high activity in tier-1. These active peers are responsible for diffusing the newly generated fresh chunks to peers located in all the involved Autonomous Systems (ASes). They contribute more bandwidth and thus enjoy shorter playback lag. Further more, adaptive biased neighbor selection algorithm is employed among non-backbone peers to keep traffic locality. Evaluated by extensive simulations, the proposed algorithms can reduce the average playback lag and cross-ISP traffic greatly.