P2P Streaming Research

Principle Investigator: Prof. Roger Zimmermann

Project: Audio Amphitheatre
Log: P2P Group Meeting
2003 Summer Schedule
Paper Survey

Lastest AudioPeer

P2P Group Meeting
May 14, 2003	compare the performance of the PP Leaving methods survey of tree construction of application level multicast tree come up with new leave operation
May 20, 2003	compare the performance of 4 tree build algorithm: SPH(source) , SPH(new node), Optimized(Dynamic), Optimized(Static) . Use GTM(GeogiaTech Topology Maker) to generate the dynamic network topology. Define resonable performance index for comparison. (Average All-to-All Delay, etc).
May 30, 2003	Find there is a bug in existing OPT solution Need to finish SPH(New node based) and SSPT(Source-Based Shortest Path Tree) performance evalutaion Select appropriate gt-itm topology and prepair some ratio chart for next meeting Prepair a sheet to explain the algorithm used in my simulation

Audio Amphitheatre

Currently the research topic is using P2P system to build a multi-user audio chatting room. The research challenging is how to design a reliable and effective P2P system that can deliver multiple audio stream on it. Our design is to use "Core Based Tree" topology for this project. CBT has its own advantage over other P2P system that it can easily support multiple streaming over it, also the algorithm running on each node is simple.

Simulation

We are using ns-2 as a simulation platform to test our algorithm. For downloading the latest development code of the simulation, please refer to following :

Lastest source code (4 files) pp-app.h, pp-app.cc, udp-pp.h, udp-pp.cc .
Example: Following are scenarios we created to test the running of the simulation
- Node in hexagon shape (Node 0) is the Rendezvous Point.
- Node in circle shape (Node 1,2,3) are router node.
- Node in box shape (Node 4,5,6,7) are regular node.
- Gray means node not in the P2P group.
- Red indicates core node
- Orange indicate node are member of the P2P group.
- Green flow indicate voice data streaming.
- Nodes marked with green circle are talking.
- Test 1 : A simple test case to show that Join, Leave and Talk are working.
  ( click here to download the movie directly )
- Test 2 : Another simple demo for multiple user talking at the same time.
  ( click here to download the movie directly )
- Test 3 : A case to show core migration when core leaves.
  ( click here to download the movie directly )

Paper Survey
May 19, 2003	A Survey of QoS Multicasting Issues(2000) (pdf)	Almost no research has been done on low service disruption tree migration Little is done on node/link failure in core-based tree

Research Group

Group Member

Leslie S. Liu
Beomjoo Seo
Rahul Hampole