Published on

  • Be the first to comment

  • Be the first to like this

No Downloads
Total views
On SlideShare
From Embeds
Number of Embeds
Embeds 0
No embeds

No notes for slide


  1. 1. How To Implement H.323 Presented at the Joint Techs Workshop 28 - 31 January 2001 University of Hawaii, Honolulu, HA By Larry Amiot (NWU/I2) and Tyler Miller Johnson (UNC)
  2. 2. Today’s Agenda <ul><li>Video Conferencing Environment </li></ul><ul><li>H.323 Video Conferencing </li></ul><ul><ul><li>Basics </li></ul></ul><ul><ul><li>ITU Standard </li></ul></ul><ul><ul><li>Addressing and Zone Management </li></ul></ul><ul><li>H.323 Deployment </li></ul><ul><li>Internet2 Video Conferencing Service </li></ul><ul><li>Applications in the Educational Environment </li></ul>
  3. 3. Video Conferencing Environment
  4. 4. Digital Video In The Educational Environment <ul><ul><li>Classroom presentations- need for video clips </li></ul></ul><ul><ul><li>Colloquiums- need to broadcast on the network </li></ul></ul><ul><ul><li>Homework Assignments- Video-based reference material </li></ul></ul><ul><ul><li>Collaborative classes- need for remote interaction between class participants </li></ul></ul><ul><ul><li>Committee meetings- need for remote interaction between participants </li></ul></ul><ul><ul><li>Informal collaboration- need for remote interaction between colleagues </li></ul></ul><ul><ul><li>Conference presentations- need for remote interaction between presenters and audience </li></ul></ul>
  5. 5. Parts of the Puzzle <ul><li>Web-based Virtual Classroom </li></ul><ul><li>Collaborative Tools </li></ul><ul><ul><li>Application sharing </li></ul></ul><ul><ul><li>White board </li></ul></ul><ul><ul><li>Chat window </li></ul></ul><ul><li>Video Conferencing </li></ul><ul><li>Real-time Streamed Video </li></ul><ul><li>Archived Video </li></ul>
  6. 6. Video Conferencing Alternatives <ul><li>ISDN-based </li></ul><ul><ul><li>H.320 (Legacy) </li></ul></ul><ul><li>Internet-based </li></ul><ul><ul><li>Access Grid </li></ul></ul><ul><ul><li>http://www-fp.mcs.anl.gov/fl/accessgrid/ </li></ul></ul><ul><ul><li>Virtual Room Videoconferencing System (VRVS) </li></ul></ul><ul><ul><li>http://vrvs.cern.ch/ </li></ul></ul><ul><ul><li>MPEG2 Multicast </li></ul></ul><ul><ul><li>H.323 </li></ul></ul>
  7. 7. H.323 Video Conferencing <ul><li>H.323 Video Conferencing is becoming widely used in the educational environment. </li></ul><ul><ul><li>Staff meetings </li></ul></ul><ul><ul><li>Working Group meetings </li></ul></ul><ul><ul><li>Collaborations </li></ul></ul><ul><ul><li>Interactive classes </li></ul></ul><ul><ul><li>Conference tracks </li></ul></ul>
  8. 8. ViDeNet: A Business Case <ul><li>ViDeNet is one current model for deployment </li></ul><ul><li>Voice-Over-IP integration driving the business case </li></ul><ul><li>Research applications driving video implementations </li></ul>
  9. 9. H.323 Video Conferencing <ul><li>Basics </li></ul><ul><li>ITU Standard </li></ul><ul><li>Addressing and Zone Management </li></ul>
  10. 10. H.323 Standard <ul><li>Umbrella set of standards defining real-time multimedia communications and conferencing over packet-based networks </li></ul><ul><li>International Telecommunications Union (ITU) finalized Version 1 in 1996 </li></ul><ul><li>Version 2 approved January 1998 </li></ul><ul><li>Part of the family H.32x standards </li></ul>
  11. 11. H.323 Standard <ul><li>Version 2 added </li></ul><ul><ul><li>Security (H.235) </li></ul></ul><ul><ul><ul><li>Authentication/Authorization </li></ul></ul></ul><ul><ul><ul><li>Integrity </li></ul></ul></ul><ul><ul><ul><li>Privacy </li></ul></ul></ul><ul><ul><ul><li>Non-Repudiation </li></ul></ul></ul><ul><ul><li>Fast call setup </li></ul></ul><ul><ul><li>T.120/H.323 integration </li></ul></ul><ul><ul><li>Supplementary services </li></ul></ul><ul><ul><ul><li>Call transfer </li></ul></ul></ul><ul><ul><ul><li>Call diversion </li></ul></ul></ul>
  12. 12. H.323 Standard <ul><li>H.323 Components </li></ul><ul><ul><li>Terminals (Clients) </li></ul></ul><ul><ul><li>Gateways </li></ul></ul><ul><ul><li>GateKeepers </li></ul></ul><ul><ul><li>Multipoint Control Units (MCU’s) </li></ul></ul>
  13. 13. H.323 Standard <ul><li>H.323 standard covers </li></ul><ul><ul><li>Voice- required </li></ul></ul><ul><ul><li>Video- optional </li></ul></ul><ul><ul><li>Data- optional </li></ul></ul>
  14. 14. H.323 Clients INTERNET H.323 Video Conferencing GateKeeper MCU Real Video Web Browser H.323
  15. 15. Pieces of H.323 <ul><li>Audio Codecs </li></ul><ul><ul><li>G.711 (required), G.722, G.723, G.728, G.729 </li></ul></ul><ul><li>Video Codecs </li></ul><ul><ul><li>H.261 (required), H.263 </li></ul></ul><ul><li>Data Sharing </li></ul><ul><ul><li>T.120, T.125 Annex A (multicast) </li></ul></ul><ul><li>Call Control </li></ul><ul><ul><li>H.245 </li></ul></ul>
  16. 16. Control Data Audio Video A/V Control Control RAS RTCP RTP G.7XX H.26X H.245 T.120 H.225 (Q.931) TCP UDP IP H.323 Protocol Stack
  17. 17. H.323 Standard <ul><li>Gatekeeper required functions </li></ul><ul><ul><li>Address translation </li></ul></ul><ul><ul><li>Admissions control </li></ul></ul><ul><ul><li>Bandwidth control </li></ul></ul><ul><ul><li>Zone management </li></ul></ul><ul><li>Optional functions </li></ul><ul><ul><li>Call control signaling </li></ul></ul><ul><ul><li>Call authorization </li></ul></ul><ul><ul><li>Bandwidth management </li></ul></ul><ul><ul><li>Call management </li></ul></ul>
  18. 18. H.323 Zone <ul><li>Gatekeeper (master control) </li></ul><ul><li>Multipoint Control Unit (MCU) </li></ul><ul><li>Gateway </li></ul><ul><li>Endpoints </li></ul>
  19. 19. Addressing H.323 Concepts <ul><li>Three intraZone Dialing Modes </li></ul><ul><ul><li>By IP address – not recommended </li></ul></ul><ul><ul><li>By Alias ( trjohns1 or [email_address] ) </li></ul></ul><ul><ul><li>By Extension (226.6101) </li></ul></ul><ul><li>Interzone Dialing </li></ul><ul><ul><li>‘Neighbor’ tables – current ViDeNet practice </li></ul></ul><ul><ul><li>Automatic Destination Zone Resolution </li></ul></ul><ul><ul><ul><li>Peer to peer </li></ul></ul></ul><ul><ul><ul><li>Hierarchical </li></ul></ul></ul>
  20. 20. Addressing Interfacing to the PSTN +1 (919) 226.6101 Gatekeeper PSTN IP Network Gateway EndPoint 226.6101 Exit Zone Prefix <ul><li>0 (168 245 929) 226.6101 </li></ul>Zone Prefix Extension
  21. 21. ViDeNet Peer to Peer Gatekeepers And Directory Services MetaDirectory LDAP LDAP LDAP LDAP
  22. 22. H.323 Standard <ul><li>Gateways are optional elements of H.323 that communicate with: </li></ul><ul><ul><li>PSTN analog terminals </li></ul></ul><ul><ul><li>H.320 terminals via ISDN networks </li></ul></ul><ul><ul><li>H.321 terminals over ATM </li></ul></ul><ul><ul><li>H.324 terminals over PSTN networks </li></ul></ul><ul><ul><li>Other </li></ul></ul>
  23. 23. GateKeeper H.323 Clients INTERNET H.323 Video Conferencing Real Video Web Browser H.323 H.320 Gateway ISDN MCU
  24. 24. H.323 Deployment
  25. 25. H.323 Deployment Events 1998 1999 2000 2001 2002 2003 2004 2005 H.235 Security Unix Gatekeeper Ethernet Power H.450 Fancy Services NT Gatekeeper USB Desktops Unified Messaging PCI Desktops LDAP Gatekeeper H.323 Phones VC Appliances Rack Mount CODECs Wireless H.323 RELIABILITY Cell H.323 POTS Cable TV Over IP DEPLOYMENT 100% 0% Video Voice
  26. 26. Choose Your Connection H.323 FABRIC Desktop Video Performance: Fair to Good Price: $500 - $1000 Conference Room Appliance Performance: Very Good Price: $2500 - $8000 Teleclass Codec Performance: Excellent Price: $10,000 IP Phone Performance: Excellent Price: $150 - $500 Fax / Modem Appliance Performance: Good Price: $150 -$500 Wireless IP Phone Performance: Very Good Price: $250 - $600 Soft Phone Performance: Fair Price: $0 - $50
  27. 27. In The Zone Gateway Farm Gatekeeper Cluster MCU Farm Messaging Servers PSTN Trunks H.323 FABRIC Endpoints Services Embedded, Distributed, Load Balancing NT / Unix / VxWorks Embedded, Distributed, Load Balancing NT / Unix / VxWorks Embedded, Distributed, Load Balancing NT / Unix / VxWorks Win2000 Cluster Management Server (Directory Services) Unix
  28. 28. Popular Equipment <ul><li>Gatekeepers </li></ul><ul><ul><li>RADVision NGK-100/200 </li></ul></ul><ul><ul><li>RADVision embedded gatekeeper </li></ul></ul><ul><ul><li>RADVision ECM / ViaIP400 *beta </li></ul></ul><ul><ul><li>Cisco MCM </li></ul></ul><ul><li>MCUs </li></ul><ul><ul><li>RADVision MCU-323 </li></ul></ul><ul><ul><li>RADVision ViaIP 400 platform, 100-port *beta </li></ul></ul><ul><ul><li>Accord (including h.321 gateway) </li></ul></ul><ul><ul><li>Siemens LP5100 - IP telephone ($400) </li></ul></ul><ul><li>Gateways </li></ul><ul><ul><li>RADVision L2W-323 </li></ul></ul><ul><ul><li>RADVision VIU </li></ul></ul><ul><li>Endpoints </li></ul><ul><ul><li>Polycom VS4000 - discrete codec ($10,000) </li></ul></ul><ul><ul><li>Polycom ViewStation - conference room in a box ($4000) </li></ul></ul><ul><ul><li>VCON ViGo Standard - desktop / laptop USB solution ($550) </li></ul></ul><ul><ul><li>VCON ViGo PRO - desktop / laptop USB solution/ Speaker, 2Mbps, & multicast support ($1199) </li></ul></ul><ul><ul><li>Polycom ViaVideo - desktop / laptop USB solution ($400) </li></ul></ul><ul><ul><li>Siemens LP5100 - IP telephone ($400) </li></ul></ul>
  29. 29. MCU H.323 Video Conferencing Bandwidth Requirements Audio & Video Streams (N*2*384Kbps)
  30. 30. Staffing for H.323 <ul><li>Offering H.323 Services Requires </li></ul><ul><ul><li>Account Management </li></ul></ul><ul><ul><ul><li>‘ Free-love’ zones </li></ul></ul></ul><ul><ul><ul><li>Explicitly defined users </li></ul></ul></ul><ul><ul><li>Systems Administration </li></ul></ul><ul><ul><li>Directory Services </li></ul></ul><ul><ul><li>Monitoring 7x24 </li></ul></ul><ul><ul><li>Web Documentation </li></ul></ul><ul><ul><li>Training </li></ul></ul><ul><ul><li>Initial Client Installation </li></ul></ul><ul><ul><li>Purchasing Assistance and Consultation </li></ul></ul><ul><ul><li>Help Desk </li></ul></ul>
  31. 31. ViDeNet Participants 50 and counting … American University in Cairo (Egypt) Aristotle University of Thessaloniki (Greece) Beijing Institute of Technology (China) Canarie (Canada) CiCV (France) CINECA (Italy) The College of William and Mary (Virginia) Columbia University (New York) ESnet (US Nuclear Laboratories) The Georgia Institute of Technology HEAnet (Ireland) IIUCC (Israel) Indiana University Internet2 Louisiana State University Texas A&M University University of Akron - Wayne College University of Alabama University of Colorado at Denver University of Hawaii University of Illinois at Chicago University of Illinois at Urbana-Champaign University of Missouri at Kansas City University of New Brunswick (Canada) University of North Carolina University of Pennsylvania University of South Carolina University of Tennessee University of Virginia Virginia Commonwealth University Wright State University (Ohio) Yale University (Connecticut) MCNC (North Carolina) Mississippi State University National Sun Yat-Sen University (Taiwan) National Technical University of Athens North Carolina State University NYSERnet (New York) OARNet (Ohio) Ohio State University Oklahoma State University OneNet (Oklahoma) Pennsylvania State University Procter and Gamble (Ohio) RADVision (Tel Aviv) SURFnet (the Netherlands) Tel Hai College (Israel)
  32. 32. Internet2 Video Conferencing Service
  33. 33. Collaborative Video Conferencing Services over Internet2 Initiative <ul><li>Provide a service that is intended to enable one-to-one, one-to-group, and group-to-group collaborative conferencing in support of personal communication, meetings, conferences, and shared education for Internet2 members (primary and sponsored) and their international counterparts. </li></ul>
  34. 34. Basic Tenets of Service <ul><li>Independent of geographic or national boundaries </li></ul><ul><li>Video conferencing viewed as current best collaborative environment </li></ul><ul><li>Gateways between technologies will be necessary </li></ul><ul><li>Gateways must be transparent to end users </li></ul><ul><li>Need to consider voice/telephony integration </li></ul>
  35. 35. Key Technical Issues <ul><li>A Global Dialing Plan </li></ul><ul><li>A Global Directory Service </li></ul><ul><li>A Scheduling Mechanism for the use of shared resources </li></ul><ul><li>Improvements and coordination in “back room” functionality and control </li></ul><ul><li>Interoperability with other significant communication services (gateways) </li></ul>
  36. 36. Key Technical Issues (Continued) <ul><li>QoS </li></ul><ul><li>Multicast </li></ul><ul><li>H.235 Security </li></ul><ul><ul><li>Authentication/Authorization </li></ul></ul><ul><ul><li>Integrity </li></ul></ul><ul><ul><li>Privacy </li></ul></ul><ul><ul><li>Non-Repudiation </li></ul></ul>
  37. 37. I2DV Steering Committee I2DV-VC Sub-Committee Implementation Plan Development Team Collaborative Video Conferencing Services over Internet2 White Paper Developers <ul><li>Service Implementation Team </li></ul><ul><li>Funding Task Force </li></ul><ul><li>Operations Task Force </li></ul><ul><li>Research & Development Task Force </li></ul><ul><li>Outreach & Communication Task Force </li></ul>
  38. 38. Proposed Prototype Service <ul><li>Focus on deployment not research </li></ul><ul><li>Start with single technology </li></ul><ul><li>Recommended that that prototype service be based on H.323 technology </li></ul><ul><li>Based on contributed resources </li></ul><ul><li>Based on distributed management </li></ul><ul><li>Based on distributed systems </li></ul><ul><li>Emphasis on Gateways (centralized if necessary) </li></ul>
  39. 39. Applications in the Educational Environment By Dr. Robert Dixon, Ohio State University
  40. 40. H.323 Examples <ul><li>Megaconference1 </li></ul><ul><ul><li>Fall 1999 Internet2 meeting </li></ul></ul><ul><ul><li>Over 50 sites from all over the world </li></ul></ul><ul><ul><li>384Kbps </li></ul></ul><ul><ul><li>Cascaded MCUs </li></ul></ul><ul><li>Megaconference2 </li></ul><ul><ul><li>www.mega-net.net/megaconference </li></ul></ul>
  41. 41. Megaconference2 <ul><li>Fall 2000 Internet2 meeting. </li></ul><ul><li>World’s first totally remote conference track. </li></ul><ul><li>Empty lectern. </li></ul><ul><li>Worldwide interactive audience. </li></ul><ul><li>114 End points; 28 Multipoint Control Units. </li></ul><ul><li>The model for all future conferences on all subjects. </li></ul>
  42. 42. Megaconference2 Presentations <ul><li>Use of H.323 Technology in CINECA Activities </li></ul><ul><li>Material World Module(MWM) & virtual institute </li></ul><ul><li>Use of IP Video for Distance Surgical Education </li></ul><ul><li>University of Venice Experiences </li></ul>
  43. 43. Use of IP Video for Distance Surgical Education <ul><li>Jerome Johnson (OSU), Presenter </li></ul><ul><li>Laparoscopic Surgery </li></ul><ul><ul><li>Surgical instruments & small camera inserted through incision in abdomen </li></ul></ul><ul><ul><li>Surgery performed watching TV </li></ul></ul><ul><ul><li>Consultation via 2-Way Real-time video </li></ul></ul><ul><ul><li>Instruction via Real-time Video </li></ul></ul>
  44. 45. Megaconference2 Presentations <ul><li>Generation X and Generation D Learning in the ZPD with H.323: Literacy Strategy Lessons from Rural America </li></ul><ul><li>Wireless Distribution of H.323 Videoconferencing in a Trauma Center Emergency Department </li></ul><ul><li>Tools for Extending Classroom Walls via the Internet </li></ul><ul><li>Work and Life in an Antarctic Station </li></ul>
  45. 46. Work and Life in an Antarctic Station <ul><li>Hans Pfeiffenberger (Alfred Wegener Institute), Presenter </li></ul><ul><li>Neumayer Station in Antarctica at 70 deg. South </li></ul><ul><li>384Kbps satellite link to Bremerhaven, Germany </li></ul><ul><li>Weekly conferences to interested school classes and museum visitors </li></ul>
  46. 47. Megaconference2 Presentations <ul><li>LSVNP - A Managed Prototype for H.323 Zones </li></ul><ul><li>A Multi-University Internet-based (H.323) Graduate Course in Turbulence </li></ul><ul><li>Distance Learning using H.323; A Singapore-MIT experience </li></ul><ul><li>Bodyworks: Medicine, Technology, and the Body in the late 20th Century </li></ul><ul><li>Advanced Collaboration Tools to Support Multi-University Collaborative Learning in Organizational Communication </li></ul>
  47. 48. Collaborative Learning in Organizational Communication <ul><li>Noshir Contractor (UIUC), Presenter </li></ul><ul><li>Fall 1998 to Fall 2000 </li></ul><ul><li>Real-time Graduate Seminar Courses </li></ul><ul><ul><li>Globalization </li></ul></ul><ul><ul><li>Social Network Analysis </li></ul></ul><ul><ul><li>Communication Technologies & New Forms of Organizing </li></ul></ul><ul><li>Faculty at: </li></ul><ul><ul><li>University of Illinois </li></ul></ul><ul><ul><li>Purdue University </li></ul></ul><ul><ul><li>University of Southern California </li></ul></ul><ul><ul><li>University of Pennsylvania </li></ul></ul><ul><ul><li>University of California at Santa Barbara </li></ul></ul>
  48. 49. URLs <ul><li>Internet2 Digital Video </li></ul><ul><ul><li>Dv.internet2.edu </li></ul></ul><ul><li>Megaconference </li></ul><ul><ul><li>www.mega-net.net/megaconference/ </li></ul></ul><ul><li>ViDeNet </li></ul><ul><ul><li>www.vide.net </li></ul></ul><ul><li>Videoconferencing Cookbook </li></ul><ul><ul><li>www.vide.gatech.edu/cookbook2.0/ </li></ul></ul><ul><li>VRVS </li></ul><ul><ul><li>vrvs.caltech.edu/ </li></ul></ul><ul><li>CAVNER </li></ul><ul><ul><li>www.cavner.org </li></ul></ul><ul><li>Access Grid </li></ul><ul><ul><li>http://www-fp.mcs.anl.gov/fl/Accessgrid/ </li></ul></ul>
  49. 50. How To Implement H.323 Presented at the Joint Techs Workshop 28 - 31 January 2001 University of Hawaii, Honolulu, HA By Larry Amiot (NWU/I2) and Tyler Johnson (UNC)