Transient analysis of idle time in VANETs using Markov-reward models
Abstract
The development of analytical models to analyze the
behavior of vehicular ad hoc networks (VANETs) is a challenging
aim. Adaptive methods are suitable for many algorithms (e.g.
choice of forwarding paths, dynamic resource allocation, channel
control congestion) and services (e.g. provision of multimedia
services, message dissemination). These adaptive algorithms help
the network to maintain a desired performance level. However,
this is a difficult goal to achieve, especially in VANETs due to fast
position changes of the VANET nodes. Adaptive decisions should
be taken according to the current conditions of the VANET.
Therefore, evaluation of transient measures is required for the
characterization of VANETs. In the literature, different works
address the characterization and measurement of the idle (or
busy) time to be used in different proposals to attain a more
efficient usage of wireless network. The present work focuses
on the idle time of the link between two VANET nodes, which
we denote as Tidle. Specifically, we have developed an analytical
model based on a straightforward Markov reward chain (MRC)
to obtain transient measurements of Tidle. Numerical results from
the analytical model fit well with simulation results.