Using Real World Data to Create OPNET Models DRAFT
July 2005
R. Preston, The MITRE Corporation
J. Doane, The MITRE Corporation
D. Kiwior, The MITRE Corporation
ABSTRACT
The future airborne network needs to provide routing, transport protocols
and quality of service over radio links which will experience periodic
outages due to line of sight occlusion caused by aircraft's wings and
tail. To create and test the performance of protocols under these conditions
it is necessary to correctly model the outages resulting from aircraft
occlusion. We extended OPNET to model this phenomenon and compared our
results to connectivity status data from a Joint Expeditionary Force
Exercise in 2002, (JEFX 02.)
We extended the OPNET models so the pointing direction of an antenna
affixed to a moving aircraft could be determined in 3D space. This pointing
direction can be used with an appropriate antenna pattern to determine
the antenna gain in the direction of the destination. To verify the
accuracy of our modifications, we modeled the Paul Revere aircraft experiment
during JEFX02. Measurements of air-to-ground connectivity in our OPNET
simulations of this JEFX experiment show a strong correlation to the
recorded air-to-ground connectivity in the actual JEFX experiment.
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