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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 – PowerPoint PPT presentation

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Title: NASA Space Internet Workshop


1
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
2
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)

3
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

4
Terrestrial
  • Based on TCP/IP V4/6
  • LAN and WAN Links
  • Object Based-Extendable

5
Wireless
  • Point-to-Point Line-of-Sight
  • RF and Laser Communications Links
  • Object-Based Extendable

6
Satellite
  • Anything You Can Do In STK, I Can Import
  • By Using STK We Can Focus On The Communications
  • Interface Is Object-Based Extendable

7
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

8
Our Automated Process
End-to-End Model Framework
Cellular
802.11
IP Hosts
Integrated Statistical Analysis
Routes
Satellite Tool Kit
9
Alternate Data Uses
10
Model Inter-Relationships
11
Issues With the Airborne/Space Link
12
Figure 1 LEO-TRDSS RF Link Signal Strength
13
Weather Models
14
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
15
  • 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)

16
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