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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.

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dan cotton university of nebraska lincoln american distance education consortium adec

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)

slide3
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
advanced internet satellite extension project aisep
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)
advanced internet satellite extension project
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
lead institutions for aisep
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
slide7
Goal
  • Bring advanced networking applications to geographically remote campuses and learning centers for purposes of research, teaching and extension.
project will
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
objectives
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
research objectives
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)
research objectives continued
Research objectives (continued)
  • investigate QoS
  • study network performance
  • determine requirements to support this type of network
  • determine parameters for a sustainable business model
slide17

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

design goals
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
initial applications
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.
satellite trailer subsystems
Satellite Trailer Subsystems
  • Dish and radio transceiver
  • Power
  • Leveling and aiming
  • Heating and cooling
  • External connections
  • Computer
next steps
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
variables
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)
testing
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
slide27

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

observations
Observations
  • Data rate
  • Frame rate
  • Packet loss
  • Pixilation
  • Latency
  • Jitter
preliminary results
Preliminary results
  • Some fluctuations in quality
  • Some packet loss
  • It worked!
  • Excellent video
    • Internet2 <> 2Mbps / 512Kbps with 384Kpbs Tachyon service level
lessons learned
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
variables1
Variables
  • Internet2 <> Tachyon
    • PIM Sparse Mode (Internet2) versus DVMRP (Tachyon)
      • IGMP
  • Internet1, and non-multicast enabled sites
    • Cisco
    • Quickcom
  • MPEG
    • VBrick
    • Other technologies
testing observations
Testing/Observations
  • Internet2 <> Tachyon
    • Iowa State University – video streaming
  • ITEC-Ohio
    • ADEC router configuration
    • Monitoring
  • Works quite well!
research projects
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
research projects1
Research Projects
  • EPSCoR
    • 8 sub-projects
      • Land management
      • Aquaculture
      • Water conservation and management
      • Environmental monitoring
nebraska research teaching and extension project
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
slide39

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

why this work
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
credits
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