1. P2P Live Video Streaming Polytechnic University Brooklyn, NY http://cis.poly.edu/~ross

2. IPTV: Vision Thousands of channels –From hundreds of countries –Independent artists –Lectures and events –User generated from Web cams –Hand-held wireless devices High-quality image and sound –1Mbps+ Channel viewed by thousands to millions of users

3. Challenge How does a popular site distribute –a million streams –at 1 Mbps –in cost effective manner Naturally, consider P2P

4. P2P IPTV: success stories Coolstream: –4,000 simultaneous users in 2003 PPLive: –200,000 users at 400-800 kbps for 2006 Chinese New Year –Aggregate rate of 100 Gbps ppstream, UUsee, and many others

5. obtain list of peers trade chunks tracker peer Chunk downloading and uploading Source of video

6. @ Polytechnic University Measurement infrastructure for large- scale P2P live video system: PPLive Developing our own live video system Research and prototypes for P2P on- demand video –Layered video –Multiple description video

7. PPLive: Chinese New Year 2006

8. Upload and download rates: Home, Popular

9. Upload and download rates: Campus, Popular Channel

10. PPLive: Peer Departures

11. Geographic Distribution

12. Challenges Bandwidth intensive Peers come and go Asymmetric residential access Incentives for redistribution Lags among viewers Security –Pollution –Overtaking for DDoS

13. Summary Live video over the Internet P2P distribution Huge success stories: in China Business models: –Embedded video ads User generated in future Many challenges remain