Poster on

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Poster on 4x8 foot posterboard
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The IRI-h Objectives 1

• Platform Independent Services using JAVA
  technology
• Multi-participant Audio/Video using Javas JMF
  framework
• Collaboration Engine with Multiple-Platform-Tool-S
  ource makes available the rich set of
  applications running on Windows/UNIX
  environments.
• Delivery to the home/office users can access
  the session over a regular Internet connection
  using the latest generation of high speed at home
  Internet connections.
• Recording/Replay indexed by session events
• Support multiple learning modes lecture,
  demonstration, collaborative learning,
  computer-based labs, student team project, study
  sessions
• Virtual Rooms the class can be divided into
  groups by assigning each group a virtual meeting
  room. Students can move from room to room and
  join in different on-going discussions.

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The IRI-h Objectives 2

• Platform/environment management including late
  join/early leave A student can join an on-going
  session at any time and fully participate in that
  class.
• Situational awareness Students, instructors and
  technical engineers are made aware of the current
  operating environment and are notified about
  noteworthy changes or unusual situations.
• Class Management instructor handouts/student
  notes, call by name, polling, classroom video,
  attendance, auto session start, class monitoring,
  enrollment
• Shared Common Experience The position and focus
  of the windows displayed on the students
  workstation is coordinated with the instructors
  machine.
• Scalable 100 participants
• Easy of Use Ease of installation, Quick class
  join

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IRI-h Network Layout
S1
S2
Multicast
P7
P6
P8
P9
Intranet
UDP tunnel
UDP tunnel
UDP tunnel
Multicast
S3
P4
P5
Multicast disabled site
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IRI-h Software Architecture
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IRI-h Startup Scenarios
E, F Automated Startup by Java Server B Manual
Join by contacting the Directory Server H
Session Manager manually invoked G Manual Join
by contacting H directly
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Login/Discussion Mode
Token controlled tools
Private panel
Room cards
Private panel
Class name and semester
Login box
Shared view
Audio control
Video control
Annotation token holder utilities
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Presentation Mode
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Collaboration Mode
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Future Tasks 1

• Gateway
• Target bandwidth setup
• uplink (to gateway) 128-512 Kbps
• downlink (from gateway) 256-740Kbps
• Tunneling for lack of multicast
• Format transcoding and/or data rate limiting.
• Bandwidth management
• Inter-Stream Synchronization
• Quality of Session management

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Performance

• IRI-h Scalability scalability tests on 35
  machines with no incremental degradation in
  performance (video/audio/IPV reception).
• Delay Audio/Video 750ms, IPV 1800ms
• Bandwidth 1.5 Mb/s with three video, audio, ipv,
  pointer and annotation
• StartUp initial interface 1 minute, video 25s,
  audio (10s), ipv (5 s), pointer(30ms), private
  services (3 s), class creation (10s)
• Refresh rates Video 15 frames/sec, IPV 5s for
  full screen

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Future Tasks 2

• Late-Join mechanisms (service state)
• Record/Replay
• Semi-reliable application access protocols
• Multiple Rooms
• Feedback network monitor, smiley face
• Additional Features classroom video, call on
  student, survey, PA channel for multiple rooms,
  exam tool, remote ipv