1 / 42

Dan Cotton University of Nebraska, Lincoln American Distance Education Consortium (ADEC)

The Application of Distance Education Using Advanced Hybrid Networking Chinese-American Networking Symposium Shanghai, People's Republic of China August 21-23, 2002. Dan Cotton University of Nebraska, Lincoln American Distance Education Consortium (ADEC). American Distance Education Consortium.

tcoomer
Télécharger la présentation

Dan Cotton University of Nebraska, Lincoln American Distance Education Consortium (ADEC)

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. The Application of Distance Education Using Advanced Hybrid NetworkingChinese-American Networking SymposiumShanghai, People's Republic of ChinaAugust 21-23, 2002 Dan Cotton University of Nebraska, Lincoln American Distance Education Consortium (ADEC)

  2. American Distance Education Consortium WWW.ADEC.EDU

  3. ADEC • Janet Poley, President • Ancillary organization of the University of Nebraska • 12 year old non-profit organization of 50 plus state universities and land grant colleges • Local, state, national and international partnerships

  4. Advanced Internet Satellite Extension Project (AISEP) • 3 year, National Science Foundation (NSF) • $4 million • NSF Supplements • Research Experiences for Undergraduates (REU) • Chinese - American Networking Symposium (CANS) • Experimental Program to Stimulate Competitive Research (EPSCoR)

  5. Advanced Internet Satellite Extension Project • Partnerships • ADEC, Internet2 Universities, smaller and minority serving institutions, rural and remote learners • Tachyon, Inc. • OARnet & ITEC-Ohio (Internet2 Technology Evaluation Center) • University of California San Diego Supercomputer Center - SDSC • Cooperative Association for Internet Data Analysis - CAIDA • National Laboratory for Applied Network Research - NLANR

  6. Lead Institutions for AISEP • University of Nebraska-Lincoln • University of Maryland-College Park • University of Illinois • North Carolina State University • North Carolina A&T University • Washington State University

  7. Goal • Bring advanced networking applications to geographically remote campuses and learning centers for purposes of research, teaching and extension.

  8. Project will: • enable unreachable campuses, remote learning centers, extension offices to share in advanced networking research and applications • create access for the research university community to scientific, cultural and human resources otherwise inaccessible

  9. Objectives AISEP will: • explore use of satellite to deliver Internet services to determine compatibility of satellite technology with I2 services and applications • explore deployment and integration of DE applications, including collaborative applications at rural, remote institutions and extension learning centers

  10. Tachyon.net

  11. ADEC Network - SDSC

  12. Typical Tachyon Satellite Dish Installation

  13. ADEC Network Site Map

  14. Research objectives • establish standards for "acceptable, application- based Internet" for remote locations • understand how to establish, build and support a satellite-based IP network • Connect Tachyon satellite gateway to the San Diego NAP (I1 and I2 service) • Provide CPEs (formerly TAPS) to ADEC member institutions (70 sites)

  15. Research objectives (continued) • investigate QoS • study network performance • determine requirements to support this type of network • determine parameters for a sustainable business model

  16. Transportable Dish System

  17. Tachyon Central Ground Station San Diego Internet Instructional Sites Earth Satellite Internet 1 or Internet 2 Transportable Ground Station Permanent Ground Station Instructional Sites Instructional Sites

  18. Design Goals • Inexpensive to build and operate • Off-the-shelf parts for easy duplication • Easy to operate by one person with one day training • Small and light • Reliable and adaptable to diverse field conditions • Reliable and adaptable to diverse field conditions • Easily modified

  19. Initial Applications • Provide distance learning in rural/remote and underserved areas • Link field research to campus computers, laboratories, and collaborators worldwide • Link field instruction and demonstrations to campus classrooms • Link field activities to remote databases using devices such as PDAs • Remote monitoring of construction projects • Special events, conferences, fairs, disasters, etc.

  20. Portable

  21. Satellite Trailer Subsystems • Dish and radio transceiver • Power • Leveling and aiming • Heating and cooling • External connections • Computer

  22. Next steps • Develop improved designs • Demonstrate at conferences • Publish papers • Provide training on use of the system • Provide consultation on design, construction and operation • Arrange for turnkey system purchases

  23. Application Testing

  24. H.323 Over Satellite

  25. Variables • Tachyon Network • Satellite IP, asynchronous, bandwidth settings dedicated vs. non-dedicated service • Polycom • dialing speeds • Internet1 – Internet2 • Point-to-point, multi-point • Data flow: uplink > downlink, downlink > uplink • Network traffic, noise • H.323 • Multipoint Control Unit (MCU)

  26. Testing • Test tape • Internet1 and Internet2 • Tachyon bandwidth service • 2mb/256k non-dedicated • 2mb/512k non-dedicated • Identify optimum Polycom speed per Tachyon bandwidth service • Video tape results

  27. Internet Instructional Sites Tachyon Central Ground Station San Diego Earth Satellite Internet 1 or Internet 2 H.323 Testing ITEC-Ohio Ground Station Instructional Sites

  28. Observations • Data rate • Frame rate • Packet loss • Pixilation • Latency • Jitter

  29. Preliminary results • Some fluctuations in quality • Some packet loss • It worked! • Excellent video • Internet2 <> 2Mbps / 512Kbps with 384Kpbs Tachyon service level

  30. Program Design

  31. ADEC H.323 Presentation for Megaconference III

  32. Lessons Learned • Hybrid networking works • Television techniques can be applied….and they positively impact program quality • Studio cameras • Studio lighting • Studio set • Microphones • Producer / director • Don’t limit your thinking….explore all possibilities

  33. Multicast Over Satellite

  34. Variables • Internet2 <> Tachyon • PIM Sparse Mode (Internet2) versus DVMRP (Tachyon) • IGMP • Internet1, and non-multicast enabled sites • Cisco • Quickcom • MPEG • VBrick • Other technologies

  35. Testing/Observations • Internet2 <> Tachyon • Iowa State University – video streaming • ITEC-Ohio • ADEC router configuration • Monitoring • Works quite well!

  36. Research Projects • EPSCoR • …to extend the AISEP test-bed into EPSCoR states in a systematic fashion, as well as test specific remote sensing, GIS and other scientific applications of hybrid networking, including satellite • …using appropriate combinations of fiber, satellite, wires and radio technology to carry signals in combination with software and devices for data collection, communications, visualization and decision making

  37. Research Projects • EPSCoR • 8 sub-projects • Land management • Aquaculture • Water conservation and management • Environmental monitoring

  38. Nebraska Research, Teaching and Extension Project • Internet2 Applications to Enhance the Management of Natural and Agro-ecosystems.” • Carbon Sequestration and Global Climate Change • Improved Efficiencies of Nitrogen and Irrigation Management • Grazing Behavior of Cattle in the Nebraskan Sandhills

  39. Improved Efficiencies of Nitrogen and Irrigation Management Tachyon Central Ground Station San Diego Earth Satellite Internet 2 University of Nebraska Lincoln Satellite IP Data loggers and sensors Tachyon Access Point (TAP) 802.11b network Computer

  40. Why this work? • ADEC believes distance education…. • is about providing new knowledge and information wherever and whenever the learner is ready to take advantage of it • positively impacts competition • leads to improved economic development • aids in cultural sharing and understanding • is vital in community building • requires advanced networking and information technology

  41. Credits • Janet Poley, Ph D • President of ADEC • Bob Dixson, Ph D, PE • Chief Research Engineer • Ohio State, OARnet • Paul Schopis • Senior Network Engineer • ITEC-Ohio

  42. Questions

More Related