may 07 - 09, 2006icbl 2007 florianopolis brazil1 iri-easy: a distance education software system y....
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May 07 - 09, 2006 ICBL 2007 Florianopolis Brazil 1
IRI-Easy: A Distance Education Software
System
Y. Wang, K. Maly, C. M. Overstreet
Department of Computer ScienceOld Dominion University
{ywang, maly, cmo}@cs.odu.edu
May 07 - 09, 2006 ICBL 2007 Florianopolis Brazil 2
Overview - Synchronous virtual classroom
environment
IRI-h provided support for heterogeneous network environments, heterogeneous platforms and introduced the notion of a commonly shared view of any shared activities among all participants
IRI-Easy extends IRI-h functionality to allow simple on-the-fly set up and joining of collaborative sessions and is suitable for groups of participants located in isolated multicast-enabled Intranets
May 07 - 09, 2006 ICBL 2007 Florianopolis Brazil 3
Features Each functionality mostly 1-2 clicks
(very few 3) Session start and join simple and
fast Java implementation Audio, video conferencing, tool
sharing, gateways, white board, and pointer service.
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May 07 - 09, 2006 ICBL 2007 Florianopolis Brazil 5
Architecture sample - continued
Two multicast sites connected by unicast tunnel
Java server for authentication Directory server keeps track of all
participants and sessions Join through multicast site or
unicast tunnel
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Features - continued Heterogeneous network environment
Gateways Rate control for video and tool sharing
Heterogeneous platforms Common shared view with multiple
control Works behind NAT and with slow
bandwidth participants
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User interface
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IRI-easy modes
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IRI-easy modes
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Conclusions IRI-Easy works perfectly in
Intranets IRI-Easy may have some problems
with audio over low bandwidth connections when heavy tool sharing is done
It’s not easy to design a simple interface for a complex system