Title: NASA Space Internet Workshop
1NASA 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
2End-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)
3Data 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
4Terrestrial
- Based on TCP/IP V4/6
- LAN and WAN Links
- Object Based-Extendable
5Wireless
- Point-to-Point Line-of-Sight
- RF and Laser Communications Links
- Object-Based Extendable
6Satellite
- Anything You Can Do In STK, I Can Import
- By Using STK We Can Focus On The Communications
- Interface Is Object-Based Extendable
7STK 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
8Our Automated Process
End-to-End Model Framework
Cellular
802.11
IP Hosts
Integrated Statistical Analysis
Routes
Satellite Tool Kit
9Alternate Data Uses
10Model Inter-Relationships
11Issues With the Airborne/Space Link
12Figure 1 LEO-TRDSS RF Link Signal Strength
13Weather Models
14Integrated 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)
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