Abstract
The connectivity among vehicles is affected by obstructions either static (e.g., buildings,
vegetation, hills) or mobile (other vehicles on the road). The low height of antennas onboard
the vehicles implies that the optical line of sight (LOS) can be obstructed by the obstructions,
in particular by the mobile obstructions causing disconnection among vehicles even within the
single hop transmission range. In this work, the channel modeling for vehicular communication
scenario is investigated in detail. Multiple knife-edge diffraction is proposed to account for
attenuation caused by vehicle along the propagation path. The vehicular communication
scenario is simulated in the ns-3 network simulator with four categories of vehicles and the
attenuation loss is calculated. The simulation results confirm that vehicles as obstructions can
be a major source of signal attenuation and a single vehicle can cause attenuation up to 20
dB in the road scenario.
Faisal Khan, Farhan Elahi, Kamran Ali, Sadique Ahmed Bugti, Ehsanullah Kakar. (2012) Attenuation Caused by Obstructing Vehicles in V ANETs, Journal of Applied and Emerging Sciences, Volume 3, Issue 2.
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