NASA Space Internet Workshop

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NASA Space Internet Workshop
End-to-End Network Modeling Using Terrestrial,
Wireless and Satellite Components Ray Williams -
TASC Ramon.Williams_at_ngc.com 7 June 2004
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End-To-End Architecture/Model Methodology

• Data Discovery, Storage, Manipulation and
  Modeling
• Develop Complex End-to-End Architectures in
  Minutes
• Model and Analyze the Complete Environment
• Terrestrial
• Wireless
• Satellite
• Analysis and Visualization To Accurately Depict
  Relationships and Performance
• Satellite Tool Kit Orbital Dynamics with
  Superior Interactivity
• Integrated C4ISR Views with Popkin System
  Architect
• Architecture, Requirements and Schedule
• GIS Tools/Methods and Associated Layers
• Day/Night Shading
• DTED and VMAP Terrain Data
• Discrete Event Network Modeling Tools
• Network Simulator (ns-2)
• Opnet (IT Guru, Modeler)

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Data Discovery, Storage, Correlation/Transformatio
n

• Terrestrial
• Topology and Individual Host Data Obtained from
  nMap, nTop, Firewalk, Traceroute, tEthereal
  traces, Circuit Databases,
• Wireless
• RF Point-to-Point, Area Coverage Obtained from
  CSPT, Others
• RF Survey Data From Kismet, GPSMap, GPSD,
• Laser Through NWP-ARPS Extensions
• Satellite
• Orbital Parameters Taken from Two-Line-Element
  (TLEs), STK Import,
• Requirements
• Import of Customer Requirements Documents, DOORS,
  RequisitePro, AP233

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Terrestrial

• Based on TCP/IP V4/6
• LAN and WAN Links
• Object Based-Extendable

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Wireless

• Point-to-Point Line-of-Sight
• RF and Laser Communications Links
• Object-Based Extendable

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Satellite

• Anything You Can Do In STK, I Can Import
• By Using STK We Can Focus On The Communications
• Interface Is Object-Based Extendable

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STK As A Compute Engine

• STK with it's Connect and Coverage Modules is
  Invaluable for Incorporating Satellite Objects
  into Network Scenarios
• Architecture Components Exported to STK via
  Connect
• STK is Commanded to Compute Coverage Times and
  Orbital Positions
• STK Returns Values That Are Stored in a File That
  is Parsed Using Perl And Those Events Are
  Inserted into Time-Based Scenario File for
  Execution

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Our Automated Process
End-to-End Model Framework
Cellular
802.11
IP Hosts
Integrated Statistical Analysis
Routes
Satellite Tool Kit
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Alternate Data Uses
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Model Inter-Relationships
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Issues With the Airborne/Space Link
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Figure 1 LEO-TRDSS RF Link Signal Strength
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Weather Models
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Integrated Model Output
2. Iridium 13 in Sight - Seattle to Washington
Traffic Re-Routing
1. Start of Network
3. Iridium 13 - Out of Sight San Diego to Norfolk
Traffic
Routed Over Ground
4. No Satellite links up
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• Briefing is Based on the Paper Presented at the
  2004 Society of Optical Engineers Conference
  (SPIE.org) at Orlando, FLA End-to-End Network
  Models Encompassing Satellite, Terrestrial and
  Wireless Components
• Majority of Screenshots Acquired From The TASC
  Rapid Architecture Development and Evaluation
  System (TRADES)

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