Analysis of Collision Probability in IEEE 802.11Based VANETs
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Graphical Abstract
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Abstract
Vehicular ad hoc network (VANET) is a
new type of ad hoc network with the characteristics of
highly dynamic topology, variable vehicle velocity and den-
sity. In the performance evaluation of VANETs, tradi-
tional collision probability model is not suitable because
it poorly re°ects these characteristics. This paper focuses
on the analysis of collision probability, which is a vital in-
gredient for any performance evaluation in IEEE 802.11
system. On the basis of collision probability in WLANs, a
new model is proposed to estimate collision probability in
VANETs, which integrates the characteristics of VANETs.
The model shows that the collision probability in VANETs
is no longer a constant value as in traditional model, but
a function of the factors re°ecting the characteristics of
VANETs. Simulation results using Network Simulator
2 (ns-2) show the validity and accuracy of the proposed
model.
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