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How To Implement H.323

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  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. Today’s Agenda • Video Conferencing Environment • H.323 Video Conferencing • Basics • ITU Standard • Addressing and Zone Management • H.323 Deployment • Internet2 Video Conferencing Service • Applications in the Educational Environment

  3. Video Conferencing Environment

  4. Digital Video In The Educational Environment • Classroom presentations- need for video clips • Colloquiums- need to broadcast on the network • Homework Assignments- Video-based reference material • Collaborative classes- need for remote interaction between class participants • Committee meetings- need for remote interaction between participants • Informal collaboration- need for remote interaction between colleagues • Conference presentations- need for remote interaction between presenters and audience

  5. Parts of the Puzzle • Web-based Virtual Classroom • Collaborative Tools • Application sharing • White board • Chat window • Video Conferencing • Real-time Streamed Video • Archived Video

  6. Video Conferencing Alternatives • ISDN-based • H.320 (Legacy) • Internet-based • Access Grid http://www-fp.mcs.anl.gov/fl/accessgrid/ • Virtual Room Videoconferencing System (VRVS) http://vrvs.cern.ch/ • MPEG2 Multicast • H.323

  7. H.323 Video Conferencing • H.323 Video Conferencing is becoming widely used in the educational environment. • Staff meetings • Working Group meetings • Collaborations • Interactive classes • Conference tracks

  8. ViDeNet: A Business Case • ViDeNet is one current model for deployment • Voice-Over-IP integration driving the business case • Research applications driving video implementations

  9. H.323 Video Conferencing Basics ITU Standard Addressing and Zone Management

  10. H.323 Standard • Umbrella set of standards defining real-time multimedia communications and conferencing over packet-based networks • International Telecommunications Union (ITU) finalized Version 1 in 1996 • Version 2 approved January 1998 • Part of the family H.32x standards

  11. H.323 Standard • Version 2 added • Security (H.235) • Authentication/Authorization • Integrity • Privacy • Non-Repudiation • Fast call setup • T.120/H.323 integration • Supplementary services • Call transfer • Call diversion

  12. H.323 Standard • H.323 Components • Terminals (Clients) • Gateways • GateKeepers • Multipoint Control Units (MCU’s)

  13. H.323 Standard • H.323 standard covers • Voice- required • Video- optional • Data- optional

  14. GateKeeper MCU H.323 Real Video Web Browser H.323 Video Conferencing INTERNET H.323 Clients

  15. Pieces of H.323 • Audio Codecs • G.711 (required), G.722, G.723, G.728, G.729 • Video Codecs • H.261 (required), H.263 • Data Sharing • T.120, T.125 Annex A (multicast) • Call Control • H.245

  16. H.323 Protocol Stack A/V Control Control Data Audio Video Control G.7XX H.26X RTCP RAS H.225 (Q.931) H.245 T.120 RTP TCP UDP IP

  17. H.323 Standard • Gatekeeper required functions • Address translation • Admissions control • Bandwidth control • Zone management • Optional functions • Call control signaling • Call authorization • Bandwidth management • Call management

  18. H.323 Zone • Gatekeeper (master control) • Multipoint Control Unit (MCU) • Gateway • Endpoints

  19. AddressingH.323 Concepts • Three intraZone Dialing Modes • By IP address – not recommended • By Alias (trjohns1 or tyler@netcall1.unc.edu) • By Extension (226.6101) • Interzone Dialing • ‘Neighbor’ tables – current ViDeNet practice • Automatic Destination Zone Resolution • Peer to peer • Hierarchical

  20. 0 (168 245 929) 226.6101 Extension Zone Prefix Exit Zone Prefix AddressingInterfacing to the PSTN Gatekeeper EndPoint 226.6101 +1 (919) 226.6101 Gateway PSTN IP Network

  21. And Directory Services MetaDirectory LDAP LDAP LDAP LDAP ViDeNet Peer to Peer Gatekeepers

  22. H.323 Standard • Gateways are optional elements of H.323 that communicate with: • PSTN analog terminals • H.320 terminals via ISDN networks • H.321 terminals over ATM • H.324 terminals over PSTN networks • Other

  23. MCU H.323 Video Conferencing H.320 ISDN GateKeeper Gateway H.323 Real Video INTERNET Web Browser H.323 Clients

  24. H.323 Deployment

  25. 100% POTS Video H.450 Fancy Services Voice Unified Messaging RELIABILITY DEPLOYMENT H.235 Security NT Gatekeeper Unix Gatekeeper Ethernet Power USB Desktops Cable TV Over IP H.323 Phones VC Appliances Rack Mount CODECs Wireless H.323 LDAP Gatekeeper PCI Desktops Cell H.323 0% 1998 1999 2000 2001 2002 2003 2004 2005 H.323 Deployment Events

  26. H.323 FABRIC Conference Room Appliance Performance: Very Good Price: $2500 - $8000 Desktop Video Performance: Fair to Good Price: $500 - $1000 Teleclass Codec Performance: Excellent Price: $10,000 IP Phone Performance: Excellent Price: $150 - $500 Wireless IP Phone Performance: Very Good Price: $250 - $600 Soft Phone Performance: Fair Price: $0 - $50 Fax / Modem Appliance Performance: Good Price: $150 -$500 Choose Your Connection

  27. Endpoints H.323 FABRIC Gatekeeper Cluster Management Server (Directory Services) Embedded, Distributed, Load Balancing NT / Unix / VxWorks Unix Win2000 Cluster Gateway Farm Embedded, Distributed, Load Balancing NT / Unix / VxWorks Messaging Servers Services MCU Farm PSTN Trunks Embedded, Distributed, Load Balancing NT / Unix / VxWorks In The Zone

  28. Gatekeepers RADVision NGK-100/200 RADVision embedded gatekeeper RADVision ECM / ViaIP400 *beta Cisco MCM MCUs RADVision MCU-323 RADVision ViaIP 400 platform, 100-port *beta Accord (including h.321 gateway) Siemens LP5100 - IP telephone ($400) Gateways RADVision L2W-323 RADVision VIU Endpoints Polycom VS4000 - discrete codec ($10,000) Polycom ViewStation - conference room in a box ($4000) VCON ViGo Standard - desktop / laptop USB solution ($550) VCON ViGo PRO - desktop / laptop USB solution/ Speaker, 2Mbps, & multicast support ($1199) Polycom ViaVideo - desktop / laptop USB solution ($400) Siemens LP5100 - IP telephone ($400) Popular Equipment

  29. Audio & Video Streams (N*2*384Kbps) MCU H.323 Video Conferencing Bandwidth Requirements

  30. Staffing for H.323 • Offering H.323 Services Requires • Account Management • ‘Free-love’ zones • Explicitly defined users • Systems Administration • Directory Services • Monitoring 7x24 • Web Documentation • Training • Initial Client Installation • Purchasing Assistance and Consultation • Help Desk

  31. ViDeNet Participants50 and counting … 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) 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 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. Internet2 Video Conferencing Service

  33. Collaborative Video Conferencing Services over Internet2 Initiative • 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.

  34. Basic Tenets of Service • Independent of geographic or national boundaries • Video conferencing viewed as current best collaborative environment • Gateways between technologies will be necessary • Gateways must be transparent to end users • Need to consider voice/telephony integration

  35. Key Technical Issues • A Global Dialing Plan • A Global Directory Service • A Scheduling Mechanism for the use of shared resources • Improvements and coordination in “back room” functionality and control • Interoperability with other significant communication services (gateways)

  36. Key Technical Issues (Continued) • QoS • Multicast • H.235 Security • Authentication/Authorization • Integrity • Privacy • Non-Repudiation

  37. White Paper Developers • Service Implementation Team • Funding Task Force • Operations Task Force • Research & Development Task Force • Outreach & Communication Task Force Collaborative Video Conferencing Services over Internet2 I2DV Steering Committee I2DV-VC Sub-Committee Implementation Plan Development Team

  38. Proposed Prototype Service • Focus on deployment not research • Start with single technology • Recommended that that prototype service be based on H.323 technology • Based on contributed resources • Based on distributed management • Based on distributed systems • Emphasis on Gateways (centralized if necessary)

  39. Applications in the Educational Environment By Dr. Robert Dixon, Ohio State University

  40. H.323 Examples • Megaconference1 • Fall 1999 Internet2 meeting • Over 50 sites from all over the world • 384Kbps • Cascaded MCUs • Megaconference2 • www.mega-net.net/megaconference

  41. Megaconference2 • Fall 2000 Internet2 meeting. • World’s first totally remote conference track. • Empty lectern. • Worldwide interactive audience. • 114 End points; 28 Multipoint Control Units. • The model for all future conferences on all subjects.

  42. Megaconference2 Presentations • Use of H.323 Technology in CINECA Activities • Material World Module(MWM) & virtual institute • Use of IP Video for Distance Surgical Education • University of Venice Experiences

  43. Use of IP Video for Distance Surgical Education • Jerome Johnson (OSU), Presenter • Laparoscopic Surgery • Surgical instruments & small camera inserted through incision in abdomen • Surgery performed watching TV • Consultation via 2-Way Real-time video • Instruction via Real-time Video

  44. Megaconference2 Presentations • Generation X and Generation D Learning in the ZPD with H.323: Literacy Strategy Lessons from Rural America • Wireless Distribution of H.323 Videoconferencing in a Trauma Center Emergency Department • Tools for Extending Classroom Walls via the Internet • Work and Life in an Antarctic Station

  45. Work and Life in an Antarctic Station • Hans Pfeiffenberger (Alfred Wegener Institute), Presenter • Neumayer Station in Antarctica at 70 deg. South • 384Kbps satellite link to Bremerhaven, Germany • Weekly conferences to interested school classes and museum visitors

  46. Megaconference2 Presentations • LSVNP - A Managed Prototype for H.323 Zones • A Multi-University Internet-based (H.323) Graduate Course in Turbulence • Distance Learning using H.323; A Singapore-MIT experience • Bodyworks: Medicine, Technology, and the Body in the late 20th Century • Advanced Collaboration Tools to Support Multi-University Collaborative Learning in Organizational Communication

  47. Collaborative Learning in Organizational Communication • Noshir Contractor (UIUC), Presenter • Fall 1998 to Fall 2000 • Real-time Graduate Seminar Courses • Globalization • Social Network Analysis • Communication Technologies & New Forms of Organizing • Faculty at: • University of Illinois • Purdue University • University of Southern California • University of Pennsylvania • University of California at Santa Barbara

  48. URLs • Internet2 Digital Video • Dv.internet2.edu • Megaconference • www.mega-net.net/megaconference/ • ViDeNet • www.vide.net • Videoconferencing Cookbook • www.vide.gatech.edu/cookbook2.0/ • VRVS • vrvs.caltech.edu/ • CAVNER • www.cavner.org • Access Grid • http://www-fp.mcs.anl.gov/fl/Accessgrid/

  49. 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)