1 / 28

ConferenceXP Update

ConferenceXP Update. Fred Videon & Andrew Whitaker University of Washington. I’m ConferenceXP. I’m Access Grid. Talk Outline. ConferenceXP Background and Current Release Upcoming Release: ConferenceXP 5.0 ConferenceXP Deployments of Interest Questions/Discussion.

Leo
Télécharger la présentation

ConferenceXP Update

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. ConferenceXP Update Fred Videon & Andrew Whitaker University of Washington

  2. I’m ConferenceXP I’m Access Grid

  3. Talk Outline • ConferenceXP Background and Current Release • Upcoming Release: ConferenceXP 5.0 • ConferenceXP Deployments of Interest • Questions/Discussion

  4. Center for Collaborative Technologies • Microsoft funded center • Mandate: • Investigate education and other collaborative scenarios • Extend and maintain the ConferenceXP platform • Build the community of users and developers • http://cct.cs.washington.edu

  5. ConferenceXP • Platform for Real-time collaboration • High-quality multipoint conferencing • Full-screen, real-time video at 30 fps • Built-in presentation capability, whiteboard & screen sharing

  6. A Brief History of ConferenceXP • Project began at MSR in 2001 as DISC • Successful UW deployment for distance learning, ongoing since Spring 2003 • 4-way distance learning deployments Autumn 2004, 2005 & 2006 • July 2007: UW Center for Collaborative Technologies founded to continue CXP development & support

  7. ConferenceXP Services • Venue Service • Provide virtual meeting spaces • Simple web service • Archive Service • Conference archive & playback • Reflector Service • Unicast tunnel • Multicast support is not great in many areas

  8. ConferenceXP is a Shared Source Platform • Provides a great platform for research in collaborative environments • APIs designed for extensibility • .Net Framework shortens development cycle • Includes rich AV device support • Provides a proven platform for distance learning and distributed meetings • Existing tools support integrated TabletPC based presentation, archive post-processing and integrated archive playback

  9. Current Release • ConferenceXP 4.1 released December 2007 • Localization support • Extracted strings to resource files • Chinese version checked by native speakers • Vista Support • x64 Support

  10. UpcomingRelease • CXP 5.0: Aiming for Summer 2008 Release • Improved Diagnostics • Security Enhancements • NAT-friendly reflector • High-quality audio

  11. Diagnostics • Problem: Understanding network failures is very difficult • Approach: Aggregate connectivity information at a diagnostic service • Details (similar to multicast beacon): • Leverage the diagnostic info in RTCP • Receiver reports, sender reports • Each RTCP packet is copied over unicast to the diagnostic service

  12. Diagnostics: UI Changes • Warning icons • Tool tips • Missing participant “Ghost icon” • Access to Detail view

  13. Diagnostics: Detail View

  14. Security • 4.x has minimal security • Any client can join any venue • 5.0 provides password-protected venues • Two implementations: • Weak: Password required to access the mapping from venue name to multicast IP • Protects against accidental accesses • Strong: Password is hashed into a symmetric encryption key

  15. Security: User’s view

  16. NAT-Friendly Reflector • The 5.0 ConferenceXP allows multiple clients to run behind a single NAT device • Details: • 4.x assumes all clients use standard RTP, RTCP ports • NATs map different machines to different ports • 5.0 removes this assumption • Requires changing the JOIN protocol to use UDP

  17. High-Quality Audio • Changes to DirectShow buffering enable high-quality uncompressed audio • Higher quality compressed formats added • User control via advanced audio configuration UI Credit: José Feghali (TCU)

  18. Recent Deployments of Interest • Shared Course with Lahore University • Initial work with Latin America Virtual Institute • Music instruction and performance • Initial work with Aravind Eye Hospital

  19. Shared Course with Lahore University • Masters class, Spring 2008 • University of Washington • Lahore University of Management Science • Microsoft • Computing for the Developing world

  20. Technical Challenges • Ensuring adequate bandwidth • Limited bandwidth to Pakistan • Reliability • Ensuring this did not compromise UW-MS class • Limited time to prepare

  21. 3-way setup for UW, MS, LUMS Microsoft LUMS CP3 CP3 PMP Venue 1 PMP Venue 2 Archiver UW CP3 CP3 Server

  22. Future Work: Improved Support for Heterogeneity • Reduce complexity for scenarios such as the Lahore class • Enhance Venue to use multiple multicast groups • Admin & user configurable stream-to-group assignments • User configurable group subscription

  23. Work with LATAM Virtual Institute • March, 2008, LACCIR Meeting • Latin American and Carribbean Collaboration for ICT Research • Seattle and University of Chile, Santiago, Chile • Seminar presentation • CXP Unicast reflector

  24. Music Instruction & Performance • Work led by José Feghali at Texas Christian University • Master class in piano performance with the Royal Academy of Music in London • Other recitals and instruction including: • USC School of Music • Julliard School of Music • The New World Symphony

  25. Piano Master Class Video

  26. Aravind Eye Hospital • Video conferencing for telemedicine in southern India • Challenge: scaling beyond ~6 vision centers

  27. Get the ConferenceXP Source • ConferenceXP and related projects are available in source & binary distributions • http://www.codeplex.com/ConferenceXP Collaborate with us on new features, etc.

  28. Resources & Contacts • CCT Website/Wiki • Announcements Email List • Contacts: cct.cs.washington.edu cct-announce-request@cs.washington.edu cct@cs.washington.edufred@cs.washington.edu andrew@cs.washington.edu

More Related