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BZVD

BZVD. Dresden University of Technology Computer Centre Support Centre for Video Conference Services (BZVD). Wolfgang Wünsch Christoph Fleck. Video Conferences in the German Research Network TERENA Networking Conference 2001 ‘Highlighting Advanced Networks and Services‘ Antalya, Turkey

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BZVD

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  1. BZVD Dresden University of Technology Computer Centre Support Centre for Video Conference Services (BZVD) Wolfgang Wünsch Christoph Fleck Video Conferences in the German Research Network TERENA Networking Conference 2001 ‘Highlighting Advanced Networks and Services‘ Antalya, Turkey 14 - 17 May 2001

  2. BZVD Dresden University of Technology Computer Centre Support Centre for Video Conference Services (BZVD) Zellescher Weg 12 01062 Dresden Project Manager: Dipl.-Ing. Wolfgang Wünsch Staff: Dipl.-Inform. Undine Grohmann Dipl.-Ing. Christoph Fleck Dipl.-Ing. Detlef Makowitz Dipl.-Inform. Frank Schulze Students: Reinhard Förster, Thomas Uhle André Schulze, Tino Schinnerling Tel.: (0049)-0351-463-5653 Fax: (0049)-0351-463-7116 Video: video.urz.tu-dresden.de (0049)-0351-463-8688 E-Mail: bzvd@tu-dresden.de WWW: http://bzvd.urz.tu-dresden.de

  3. Tasks of BZVD Maintenance of local network & equipment Education The BZVD as a service centre of DFN User consulting Application searches& tests Providing video conferences(as a service)

  4. User Poll Use of Video Conferencing 13% not planned 30% short-term 57% already used Frequency: Up to 15 conferences per month Average duration: Up to 1 hour Main technology: MBone, H.323 October 1999

  5. Purpose of BZVD • Support of the DFN community with planning, installation and use of video conference services • Video conferencing as a regular service in the WiN • Co-operation with other projects of the DFN • Knowledge transfer between local partners in the WiN • Efforts and benefits  synergy effects

  6. User Consulting and Demonstrations • Introduction to standard users: • Opportunities and limitations of video conferencing • Hardware and software look-and-feel • Recommendation: H.323 or MBone tools • Users with special demands: • Help on selecting hardware and software • Supporting with first steps • H.323 and MBone tools and others • ATM, ISDN (H.320), gateway solutions

  7. Providing Video Conferences • Support for users with our equipment: • during usage mobile BZVD communication equipment • (e.g. broadcasts of conferences / meetings) • Provide a stationary video conferencing room for groups • Usage: • Ohio State University, Columbus • Demonstration for TIB e.V.(Technology & Innovations Consulting for Employees, Hamburg) • Tests in co-operation with the Max Planck Society • etc.

  8. Network of Competence • Partners  Network of local competences in the WiN • Contacts with app. 20 organisations and institutions • 8 different computer centres in Niedersachsen and 6 other research institutionsin Germany • Deutscher Wetterdienst, Virtuelles Theater Bochum, Europa Universität Frankfurt/Oder and other • (With single institutions at the moment, no network yet) • contacts are presently rather bilateral, not yet interlinked

  9. MCU Service of DFN • Application scenarios: • Directors, managers • Scientists • Demands: • Reliable and unbureaucratic management of the MCU • Reservation tool for the MCU with direct users access • Video quality: at least 384 kbps • Audio quality: G.722 • T.120 for application sharing • Continuous presence: display of the last 4-5 participants • Display of names of the participants of a conference • Reliable service, hotline, FAQs • Automation of the service: directory, configuration,billing, monitoring, gatekeeper (centralised / distributed)

  10. MCU Service of DFN • Development tasks • DFN • Provision of a reservation system • Installation of components • Installation of a monitoring system • Installation of a service administration • Recommendations for end systems / clients • User • Installation of a gatekeeper (if necessary an MCU) • Time scheduling • Start piloting in summer 2001 with restricted functionality (lack of reservation system) • and limited number of users

  11. Tests of H.323 Devices • Purpose: MCU services by DFN in WiNTerminals: end devices • Polyspan: Viewstation 128, Viewstation 512, ViaVideoSony: Contact 1600Tandberg: 1000VCON: Escort 25, Crusier 384, MC 8000, Falcon IP, ViGO ProIntel: Proshare 500, TeamStationElsa Vision II, NetMeeting 3.01, SunForum 3.1 & 3.0 • MCUs: multi control unit for group conferences • FVC: Click To MeetACCORD: MGC 100RADVision: MCU-323ezenia!: encounter 1000 NetServer • reliable, in active development, no further development, instable

  12. Tests of H.323 MCUs • MCUs: multipoint control units for H.323 • FVC: Click To Meet ACCORD: MGC 100 RADVision: MCU-323

  13. Tests of H.323 MCU‘s • FVC: Click To Meet (Demo Version) • Usage and registeration is done by the members • Closed groups with up to 15 users, small conferences with 4 users • Scheduled or ad-hoc Conferences, browser-based • ACCORD: MGC 100 • Administrator permanently needed, registration of users required • Large, closed groups, large conferences possible • Administrator starts conference • Unique functions: video splitting modes, speed matching • RADVision: MCU-323 • Usage by users themselves, no registration required • Medium-sized of conferences • Conferences start with dialing from terminal • Audio problems with NetMeeting

  14. Results of Tests • Group conferences with more than 4 terminals: difficult • Every participant with bad audio equipment cause disturbances • Video coding without special hardware is not optimal • Video display on TV - best solution, but expensive • Compatibility issues between certain H.323 devices • Gatekeeper is part of the systemconcept for the WiN • Quality of G-WiN satisfies the needs • Local problems occur sometimes • MCU: highest requirements in the network

  15. Compatibility Matrix for H.323 [2] http://bzvd.urz.tu-dresden.de/vc-systeme/matrix/

  16. Accessories

  17. Video Conference Address Book • List of video conference users • Users create and change entries individually • Listing of the entries is generally accessible [3] http://bzvd.urz.tu-dresden.de/adressen/adr.php

  18. Information of BZVD • Information available in German only [1]: • Audio / video: signals, connectors, codings • Room equipment and design • Video conference hardware & software: • Chosen products, own tests • Long list of manufacturers, distributors, services • MBone software archives • Poster: audio, video, MBone [4] • MBone Manual • PC hardware: audio / video cards • Notebook for video conferences • English translation of unique information upon request (compatibility matrix)

  19. To Do • H.323 over Firewall • Gatekeeper • QoS

  20. Links [1] http://bzvd.urz.tu-dresden.de/ [2] http://bzvd.urz.tu-dresden.de/vc-systeme/matrix/ [3] http://bzvd.urz.tu-dresden.de/adressen/adr.php [4] ftp://ftp-mm.urz.tu-dresden.de/ pub/dokumentationen/allgemein/audio-video-mbone_poster.pdf

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