1 a videoconferencing service for the german network for research and education “dfn” renate...
TRANSCRIPT
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A Videoconferencing Service for the German Network for
Research and Education “DFN”
Renate Schroeder - DFN Germany
Internet2 - Member MeetingSpring 2004
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Contents
• DFN Association
• DFNVideoConference (DFNVC)– Service Architecture– Service Model and Operational Model– Service Provision Components– Service Features and Advanced Features– Statistics– Further Plannings
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DFN: ObjectivesTarget Community: Higher Education and
Research (universities, research institutions, industry, government agencies, schools)
• Provision of national and international connectivity by means of a leading edge infrastructure (G-WiN)
• Bundling of community requirements• Set up of testbeds for next generation network
technologies and promotion of new applications• Taking part in international collaborations• Not-for-profit organisation => operational
costs must be fully covered by institutions
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G-WiN Topology
Leipzig
Berlin
Frankfurt
Karlsruhe
Garching
Kiel
Braunschweig
Dresden
Aachen
Regensburg
KaiserslauternAugsburg
Bielefeld
Hannover
ErlangenHeidelberg
IlmenauWürzburg
Magdeburg
Marburg
Göttingen
Oldenburg
Essen
St. Augustin
Core node10 Gbit/s2,4 Gbit/s2,4 Gbit/s622 Mbit/s
as of December 2003
Rostock
Global Upstream
GEANT
Hamburg
Stuttgart
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DFNVC: Managed Video Conference Service
• Increasing need for audio and video transfer with acceptable quality
• Deployment of a videoconferencing service under ITU standard H.323 started in 2001
• Pilot service from Q1 2002 to Q1 2003• Managed and charged DFN service since
April 2003
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ISDN UserVC system
UserVC system
GK
Organisation with own zone (scenario 1)
UserVC system
UserVC system
Organisation without own zone (scenario 3)
Organisation without own zone (scenario 2)
VC Portal
WorldGK
CountryGK
GW toISDN users
DCS
DFNGK
MCU (s)
DFN zone
DFNVC: Service Architecture
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• Who may use the service?– Users in DFN member organisations and
users in national/international partner organisations (guests)
• How to use the service – Member organisations contract DFN and pay a
flat charge to DFN according to the bandwidth of the DFNInternet connection
DFNVC: Service Model
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• DFN - responsible for– Management of service components (MCU, Gateway,
DCS, DFN-GK, Country-GK)– Setting up of a dial plan for the GK structure– Provision of the VC portal– Training courses for local administrators– Hotline, mailing lists
• Participating Organisations - responsible for– Establishment of a technical administrator– Attendance in training courses– Choice of VC systems & operation of a gatekeeper– Training & First level support for their users
DFNVC: Operational Model
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DFNVC: Service Provision Components (I)
• Same equipment in two locations (Berlin and Stuttgart)
• MCUs:– Premium Equipment:
• per location 2 Radvision MCU-60/G.722 with TCM 30 Audio Transcoder Board -> 240 Ports
• per location 2 Radvision MVP 30 Video Boards
– Standard Equipment:• per location 1 Radvision MCU-100 -> 200 Ports
• Gatekeeper, Gateways and DCS– per location 1 Gatekeeper Radvision ECS 2.0– per location 1 Gatekeeper GNU-GK 2.0.2– per location 1 Radvision Gateway gw-P20– per location 1 Radvision Data Collaboration System
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DFNVC: Service Features
• The service :– > allows ad hoc conferences– > offers Dial-In for ISDN-based VC systems– > takes part in the Global Dialing Scheme– > supports preparation, initiation and
management of conferences– provides test results and descriptions for VC
systems– offers training courses for administrators
and hotline
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DFNVC: Service Features
• The service :– allows ad hoc conferences– offers Dial-In for ISDN-based VC systems– takes part in the Global Dialing Scheme– supports preparation, initiation and
management of conferences– > provides test results and descriptions
for VC systems– offers training courses for administrators
and hotline
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DFNVC: Video Competence Center
• VCC TU Dresden (Video Competence Center)
– responsible for VC systems– ongoing tests of VC systems (new releases)– descriptions and instructions for
installation and configuration for the most common VC systems
– interoperability matrix of VC systems and other VC components
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Compatibility of VC Systems
Quality:
Good, reliable
good, unreliable
no function
sufficient, reliable
sufficient, unreliable
unsufficient, reliable
unsufficient, unreliable
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DFNVC: Service Features
• The service :– allows ad hoc conferences– offers Dial-In for ISDN-based VC systems– takes part in the Global Dialing Scheme– provides a VC portal– supports preparation, initiation and
management of conferences– provides test results and descriptions for
VC systems– > offers training courses for
administrators and hotline
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DFNVC: Advanced Services
• Observing the quality of network (LAN and access lines):
– Performance measurement on IP connection:• packet loss, one way delay, jitter• tests with a measurement system of the University
of Erlangen
– H.323 Beacon• tests with some organisations
– Prioritisation of IP-adresses• tests with special organisations
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Statistics
• Participants in the production service– contracts signed with 159 organisations and
institutes– ongoing negotiations with further
organisations– nearly 50% with own gatekeeper
• 17 training courses since April 2003 with 10-15 participants per course
• Several hundreds of conferences per month
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DFNVC: Further Plannings
• Migration to E.164 / DNS / ENUM• Service administration via LDAP (H.350)• Locking VC portal against unauthorized users• Integration of new functions (e.g. SIP based
signalisation, VoIP-structure)• Reservation system
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Thank You !
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DFNVC: Links
Links for interested parties
– Introduction into the topic• Videoconference Cookbook
http://vcc.urz.tu-dresden.de
• VC portal http://www.vc.dfn.de
– Procurement of VC systems and gatekeeper• VCC Dresden (Video Conference Center)
http://vcc.urz.tu-dresden.de/vc-systeme/