Speaker: S. H. Gary Chan, Department of Computer Science and Engineering The Hong Kong University of Science and Technology (HKUST) Title: Proxy-P2P Live Streaming Date/time: 4:30pm on Thursday June 25th Location: B-205 in the E-Quad Abstract: Peer-to-peer (P2P) is a promising technique for live streaming to large distributed group (such as IPTV services). In this talk, we address the design of a proxy-based peer-to-peer (proxy-P2P) streaming network, where the proxies (or super-nodes) are used as "backbone" to carry streams to local users (peers). Users, after mapping to their nearby proxies, get their streams in a peer-to-peer manner. We investigate how to achieve bandwidth-efficient low-delay streaming in such a network. At the proxy level, we study the use of mesh to achieve a certain streaming rate requirement. Since the delay is the slowest path from the source, we design a distributed algorithm called FastMesh which seeks to minimize the worst-case delay of the proxies. At the peer level, we propose and study an efficient distributed algorithm called SIM (Scalable Island Multicast) which combines overlay with IP-multicast. Through simulation and PlanetLab experiments, we show that our algorithms substantially outperform traditional and state-of-the-art approaches. At HKUST, we are currently implementing such a proxy-P2P streaming network and I will share our experience on that at the end of the talk.