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The American Distance Education Consortium. AISEP – “Shared Cyberinfrastructure” National Science Foundation. ADEC-www.adec.edu. Advancing E-Learning, E-Science, E-Access…Anytime, Anyplace Growing global network Collaboratories Strategic Planning Research and Development

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slide1
The American Distance Education Consortium
  • AISEP – “Shared Cyberinfrastructure”
  • National Science Foundation
adec www adec edu
ADEC-www.adec.edu
  • Advancing E-Learning, E-Science, E-Access…Anytime, Anyplace
  • Growing global network
  • Collaboratories
  • Strategic Planning
  • Research and Development
  • Partnerships and Development
academic trends global
Academic Trends - Global
  • Knowledge and information growing exponentially – no one can be expert – networks critical
  • Instruction is becoming more learner centers, non-linear and self directed
  • Growing emphasis on academic accountability-demonstrate competency
  • Outsourcing and partnerships increasing
e learning to change the world
E-Learning to Change the World

Survey November 2004 –nonprofits and associations www.nten.org

Entering the Mainstream: Quality and Extent of Online Education in the U.S. 2003 and 2004-Sloan-C

A Nation Online: Entering the Broadband Era

Sept. 2004 – U.S. Dept. of Commerce

key findings
Key Findings
  • Widespread Use of E-Learning: 54% of respondent organizations are using or planning to use this year – 36% more are interested
  • Vast majority of organizations satisfied:88%
  • Wide variety of uses: self-paced E-Learning most common
  • Key benefits: convenience, access and cost effectiveness
sloan c survey 2003 data
Sloan C Survey-2003 Data
  • Approximately two million students studying online
  • Online enrollment growth expected to accelerate
advanced internet satellite extension project nsf
Advanced Internet Satellite Extension Project - NSF

Goal:

Bring advanced networking applications to geographically remote learners for purposes of research, teaching and extension.

slide11

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 Customer Premise Equipment (CPE)

network

Computer

adec voice services
ADEC Voice Services

Walt Magnussen Ph.D

Texas A&M University

Director for TAMU Internet2 Technology Evaluation Center

network impairments
Network Impairments
    • Packet loss
    • Jitter
    • Latency
  • How much is to much ???
slide35

VoIP Phone Codec Testing

Internet2 Technology Evaluation Center

Department of Telecommunications

Texas A&M University, College Station, TX 77843

Design and Implementation

Network Diagram

Network Lab Setup

Above: Graduate students Clark Xu Yang and Karthik Kannan analyze results from voice quality test.

  • Ixia traffic generator loads one side of the network with generic TCP traffic.
  • Call is placed from one IP phone to the other.
  • Anritsu Data Quality Analyzer measures packet loss between the two phones.
  • Agilent VQT transmits audio file though one IP phone and receives the audio file with potential missing packets though the other IP phone.
  • VQT then compares the two audio files and returns a call quality score (MOS).

Contact: Walt Magnussen Email: [email protected] http://itec.tamu.edu

slide36

VoIP Phone Codec Testing

Internet2 Technology Evaluation Center

Department of Telecommunications

Texas A&M University, College Station, TX 77843

Results and Conclusions

  • G.729 codec degraded at a faster rate when packet loss exceeded 5%
  • Higher bandwidth applications such as LANs or MANs should use G.711 as default
  • G.711 codec provided acceptable audio quality (MOS >3.0) up to 5% packet loss.
  • GIPS codec significantly outperformed G.711 before declining in audio quality at 15%packet loss.

Contact: Walt Magnussen Email: [email protected] http://itec.tamu.edu

slide37

ADEC VoIP Beta Testing

American Distance Education Consortium (ADEC)

Tachyon Networks, Inc.

Internet2 Technology Evaluation Center

Department of Telecommunications

Texas A&M University, College Station, TX 77843

Concept and Design

  • Call is placed from SAT phone to LAN phone
  • Contending data is also transmitted over satellite link
  • Voice and contending data travels from Tachyon facilities in San Diego to the Internet2 network via the San Diego Supercomputing Center
  • Voice and data gets routed to Texas A&M University Network
  • Voice and data reaches the ITEC LAN switch
  • Data Quality Analyzer measures packets lost over the entire network
  • Voice Quality Tester takes transmitted voice and received voice then returns back a score (MOS) ranking the call quality

Contact: Walt Magnussen Email: [email protected] http://itec.tamu.edu

slide38

ADEC VoIP Beta Testing

American Distance Education Consortium (ADEC)

Tachyon Networks, Inc.

Internet2 Technology Evaluation Center

Department of Telecommunications

Texas A&M University, College Station, TX 77843

Lab Implementation

Graduate student Karthik Kannan places a call from the satellite phone to the local network phone.

Packetized voice conversation travels to Tachyon indoor units.

Lab Testing Setup

Tachyon Satellite Indoor Units

Tachyon Satellite Antenna

Packetized voice conversation is converted to an RF signal to be transmitted over the satellite antenna.

Contact: Walt Magnussen Email: [email protected] http://itec.tamu.edu

itec ohio technology projects
ITEC-Ohio Technology Projects
  • Disaster Recovery Project
    • Experiments with backup of university administrative data
last mile possibilities
Last Mile Possibilities
  • Dark fiber to the PoP
    • Spectrum Network Solutions
  • Local Area Rings (e.g., CERF)
  • Leased circuit to PoP
    • SBC Last Mile Agreement
    • SOMACS for T1s and DS3s
    • Other Last Mile Agreements
  • Satellite and Wireless Networks
the handheld camera
The Handheld Camera
  • Camera
  • Transmitter and receiver
  • Small battery pack
  • Handle
  • Range about 500 feet outdoors
the backpack camera
The Backpack Camera
  • Camera and handle
  • Transmitter and receiver
  • Big battery pack
  • Wall plug and automobile battery chargers
  • Wireless microphone for speaker
  • Hands-free director’s radio for camera person
  • GPS receiver video overlay for location documentation
  • Automobile in motion. Magnetic antenna.
  • Range about 4000 feet outdoors. Directional antenna.
contact adec
Dr. Janet Poley, C218 Animal Science, P.O. Box 830952, Lincoln, NE. 68583-0952

Voice: 402-472-7000

Fax: 402-472-9060

e-mail: [email protected]

web: http://www.adec.edu

Contact ADEC
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