Toward continuous push-based P2P live streaming

Abstract

Abstract-Due to unpredictable peer churns (joins, leaves and failures), it is challenging to offer video continuity in peer-topeer (P2P) live streaming. In this paper, we study a push-based P2P network formed by unreliable nodes (i.e., nodes which may churn at any time). To achieve high stream continuity, the video is encoded into k MDC (Multiple-Description Coded) streams and t FEC (Forward Error Correction) streams. To achieve low delay and reduce error correlation between streams, the k + t streams are pushed to the nodes in parent-disjoint spanning trees. The issue is how to construct these trees minimizing the worst-case node delay.We address the optimization of the spanning trees through problem analysis and algorithmic design. After presenting a model capturing important system parameters and delay components, we formulate the problem and prove that it is NP-hard. We then propose SUN (Streaming with Unreliable Nodes), a simple, adaptive and distributed algorithm which continuously reduces delay through overlay adaptation. Through extensive simulation on real Internet and Internet-like topologies, we show that stream continuity can be achieved with push-based P2P streaming. SUN is effective, achieving low delay and high continuity in the presence of node churns for P2P live streaming.

Novel Pre-pushing & Downloading Model in Mobile Peer-assisted Streaming Network

“…Researchers should be responsible for designing better schemes to improve the performance of the streaming network to offer better services. There are lots of researches working on mobile streaming network [6][7][8][9][10][11] and peer-assisted streaming network [12][13][14][15][16][17][18][19][20]. However, to our knowledge, so far, there is few researches on the topic of how to pre-push resources in mobile peer-assisted network.…”