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Poster on 4x8 foot posterboard

Poster on 4x8 foot posterboard. The IRI-h Objectives 1. Platform Independent Services : using JAVA technology Multi-participant Audio/Video : using Java’s JMF framework

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Poster on 4x8 foot posterboard

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  1. Poster on 4x8 foot posterboard

  2. The IRI-h Objectives 1 • Platform Independent Services: using JAVA technology • Multi-participant Audio/Video: using Java’s JMF framework • Collaboration Engine with Multiple-Platform-Tool-Source: 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.

  3. 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 student’s workstation is coordinated with the instructor’s machine. • Scalable: 100 participants • Easy of Use: Ease of installation, Quick class join

  4. High Speed Network (Multicast) High Speed Network(Multicast) Gateway Gateway G P3 P1 P2 High Delay without multicast Low Bandwidth with multicast Low Bandwidth without multicast IRI-h Network Layout S1 S2 Multicast P7 P6 P9 P8 Intranet UDP tunnel UDP tunnel Multicast UDP tunnel S3 P5 P4 Multicast disabled site

  5. Log Server SP SM Annotation Group Communication server Pointer Gateway Sharing Tool Audio Video Observers Token Managers Snd Rcv Snd Snd Gateway servers Rcv Rcv TCP connection Service manager Main Thread Snd: Sender Rcv: Receiver SP: Session Participant SM: Session Manager Thread relationship IRI-h Software Architecture

  6. SM: Session Manager SP: Session Participant HA: Host Ambassador X Y: X initiates protocol with Y X Y: X spawn Y server B SP Startup SP C D H Directory Server SM Java Server E F G HA HA SM SP SP A Startup Applet 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

  7. Login/Discussion Mode Private panel Class name and semester Room cards Token controlled tools Private panel Login box Shared view Audio control Video control Annotation token holder utilities

  8. Presentation Mode

  9. Collaboration Mode

  10. 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

  11. 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

  12. 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

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