David A. Bryan

1. David A. Bryan P2PSIP AdHoc Meeting IETF 64 (Vancouver)

2. draft-bryan-sipping-p2p-01 • Did not iterate draft for this IETF • Another iteration soon • Moving forward, I expect this will change a great deal to adapt and change to reflect protocol decisions made in this meeting and future (?) meetings

3. New Work • Evaluating routing techniques • Looking at a limited set of P2P approaches • Which common approaches are specifically appropriate for real time communications? • Simulations of performance in communications situations of many P2P algorithms • Much of this work is academic, but the non-academic part of this work is likely to result in an informational draft for input to decision making on finding appropriate routing technique

4. Routing Techniques • Preliminary results • We can eliminate a large number of existing P2P approaches designed for file sharing • Don’t guarantee termination • Optimized for number of hits, not lookup speed • Have never actually been implemented (far more common than you might imagine) • Because we have buddy lists, may be able to take advantage of “social networking” in overlay approach • Can be significant performance improvement (see Sprout algorithm)

5. Routing Techniques • Need to ensure system supports redundancy • In some approaches designed for file sharing, this hasn’t been as much of a concern since multiple copies are assumed • We aren’t likely to find a perfect or “best” technique – evaluating each and every one is likely to be a rat hole • New techniques every day • In Summary • The criterion we need for communications is likely to be quite different than for file sharing

6. More New Work • Use Cases Draft(s?) • Have an extensive use cases draft • After discussion at this IETF have several more to add • plan to combine this work with Eunsoo Shim • Will release soon • Possibly one draft on immediate uses and another of more speculative/long term uses • Speculative might be best presented in P2PRG