Vehicular Ad-hoc NETwork (VANET)
Introduction
One
of the new networking concepts which were born during the last decade is the
communication between vehicles using short range wireless solutions, known as
VANET (Vehicular Ad hoc Network).Vehicle-to-vehicle and
vehicle-to-infrastructure communication systems enable vehicles to share
information captured by their local sensors with other interested vehicles. To
ensure that this information is delivered at the right time and location, we
need a proper data dissemination mechanism. The most important problem is the
intermittent connectivity of VANET nodes caused by high mobility of cars. The
high dynamics of cars combined with usage of short range communications make
the connectivity among the cars very unstable, so even the best effort service
cannot be guaranteed. The communication quality differs in cities during
traffic jams (where we may obtain dense and stable networks) from one in
highways (where the VANET network is sparse and the topology is highly
dynamic). Due to the variety of communication scenarios it is very hard to
predict the generic transport characteristics of VANETs. VANETs can greatly
enhance driving safety by avoiding crashes potentially caused by emergent
braking, lane changing, and so on by enabling the vehicles to communicate with
their neighbours and share their driving states. In the future, it can be
supposed that with all vehicles involved in VANETs they can be more responsive
to the actions of their nearby neighbour nodes, resulting in fewer traffic
accidents. In fact, the major design goal of VANETs is to enhance driving
safety and decrease traffic accidents.
Vehicular Ad-hoc NETwotrk
Importance of
VANET in India
India is expecting a heavy
increase of vehicles on the road in the near future.As per the road safety records, in India alone, there are
around 400,000 road accidents with 90,000 fatal accidents are happening in
a year. So we need techniques to reduce road fatalities and further improve the
efficiency and ecology of road traffic. Indian roads struggle with
problems of traffic flow and instability. We can save lots of lives, money, and
time by forewarning appropriate information to the driver or vehicle regarding
congestion and traffic management.
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