Localized Multistreams for P2P Streaming

Streaming video over the Internet, including cellular networks, has now become a commonplace. Network operators typically use multicasting or variants of multiple unicasting to deliver streams to the user terminal in a controlled fashion. P2P streaming is an emerging alternative, which is theoretically more scalable but suffers from other issues arising from the dynamic nature of the system. Users' terminals become streaming nodes but they are not constantly connected. Another issue is that they are based on logical overlays, which are not optimized for the physical underlay infrastructure. An important proposition is to find effective ways to increase the resilience of the overlay whilst at the same time not conflicting with the network. In this article we look at the combination of two techniques, redundant streaming and locality awareness, in the context of both live and video-on-demand streaming. We introduce a new technique and assess it via a comparative, simulation-based study. We find that redundancy affects network utilization only marginally if traffic is kept at the edges via localization techniques

Reducing Cost and Contention of P2P Live Streaming through Locality and Piece Selection

The use of locality within peer-to-peer (P2P) networks is ensuring the construction of overlay networks that are both economically viable for network operators and scalable. However, the underlying protocols on which traditional P2P overlays are based are rapidly having to evolve in order to better support more time sensitive, real-time video delivery systems. This shift places greater demand on locality mechanisms to ensure the correct balance between bandwidth savings and successful timely playback. In this paper, we investigate the impact of peer locality within live streaming P2P systems and consider the pertinent challenges when designing locality based algorithms to support efficient P2P live streaming services. Based on our findings we propose an algorithm for supporting locality and harmonised play points in a live streaming P2P system. We present our results and in-depth analysis of its operation though a series of simulations which measure bandwidth consumption at network egress points, failure rates and each peer’s play point relative to the live stream

Cognitive interconnections

Introduction. Originally conceived as a non-commercial infrastructure, the Internet has gradually morphed into the largest ‘connectivity machine’ ever built. Business, entertainment, social life and politics are heavily reliant on the Web, which in turn requires a fully-operational network. Yet, unlike any other complex machine, the Internet has not been built with the knowledge of what it was later supposed to be doing. So now, many worry that it will fail under the strain of time- and dataintensive applications. HD Video, Cloud Services and the Internet of Things are already making this issue apparent. What will happen when new applications that are not yet in sight emerge? In this lecture I will explain why the time is ripe for a complete overhaul of the net, highlighting its actual flaws. I will discuss the network mechanisms that will help to shape the next-generation Internet, focusing on the prospects and hurdles of ‘cognitive’ networking

Exploiting Awareness of NetworkTopology and Relay Capability for P2PTVTraffic Localization

芝浦工業大学2016年