INTRODUCTION that is always changing the utilization of



World’s road moves toward becoming packed and
expands road accident because of the expansion in the quantity of vehicles in
the globe. A large portion of the developing nations are the for the most part
experiencing road accidents because of the absence of legitimate foundation for
traffic administration and accident administration. Among over all road
accidents in world most elevated number of the accidents and loss of lives are
going on in India. Likewise, 90% of the world accident  are occurring in developing nations.

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The likelihood of direct trade of kinematic
information between vehicles over an ad hoc organize condition called a
vehicular ad hoc network(VANET) has been generally seen by governments, auto
fabricating ventures and academia as a promising idea for future acknowledgment
of intelligent transportation network (ITS) accordingly accomplishing wellbeing
and productivity in our almost stuffed motorways.


Vehicular Ad Hoc Networks (VANETs) is organize
condition that is always changing the utilization of vehicles from only a
vehicle media to a clever transport instrument to guarantee road safety,
decrease in rush hour gridlock issues, basic cautions and getting to solaces
and entertainments. Vehicles using wireless communication abilities are named
as “computer networks on wheels” having information sharing
capacities. It helps in sharing data among vehicles and adjacent roadside infrastructure.
Vehicles having this innovation can enhance road movement wellbeing by imparting
crisis messages between vehicles with the goal that drivers can take proper
choices auspicious.


To lessen the quantity of road fatalities, vehicular
networks will assume an expanding part in the Intelligent Transportation
Systems (ITS) zone . Most ITS applications ,such as road security, armada
administration, and route, will rely on information traded between the vehicle
and the road side infrastructure (V2I), or even straight forwardly between
vehicles(V2V). The incorporation of sensoring abilities on-board of vehicles, alongside
shared portable communication among vehicles, gauge note worthy enhancements in
terms of safety sooner rather than later.

approach collects information available when a traffic accident occurs, which
is captured by sensors installed on on-board unit of the vehicles. The data
collected are structured in a packet, and forwarded to a remote Control Unit
through a combination of V2V and V2I wireless communication. Based on sensor
information, our system will estimate the accident severity. This information
is of utmost importance, for example, to determine the most suitable set of
resources in a rescue operation. Since we want to consider the information obtained
just when the accident occurs, to estimate its severity immediately, we are
limited by the data automatically retrievable, omitting other information,
e.g., about the driver’s degree of attention, drowsiness, etc.


Fig-1.1Basic Structure
of VANET 12

Architecture Of VANET

VANET system architecture comprises of individual
components and works in three different domains. The components required in
VANETs are on-board unit, application
unit and road-side unit.

Application Unit (AU)

An Application
Unit (AU) is gadget that exists in vehicle and executes applications using the
driving capacities of the OBU. The AU can be either a devoted gadget for
particular application say security or a gadget with correspondence to run the
Internet. An OBU can have different AUs implanted in it that can share OBUs
assets and preparing. AU might be inserted inside an OBU making it a solitary
unit or both might be independently appended through a wired or remote
association. There is just coherent distinction amongst AU and OBU.

1.1.2 On Board Unit (OBU)

An OBU is a
gadget that dwells in vehicle and aides in offering data to RSUs or with
different OBUs. Its parts incorporate a resource command processor (RCP), a UI,
a particular interface to associate with different OBUs and a system gadget for
short range wireless correspondence in light of IEEE 802.11p radio innovation.
This gadget has arrange capacities which are utilized to send, get and forward
data without wires on the fly. Working abilities of OBU incorporates directing,
nature of administration, security and IP portability.

1.1.3 Road-side Units (RSUs)

is a road side infrastructure that might be settled along roads intersections,
stopping spaces, oil pumps, eating joints, and so on. It includes a gadget with
systems administration abilities that works for short range remote interchanges
utilizing IEEE 802.11p.

Fig-1.2Architecture of

FIG-1.3Various Components of VANET in Vehicle9




Communication Architecture

Communication types in VANETs can be categorized into four types. The
category is closely related to VANETs components as described above. Figure 3
describes the key functions of each communication type.



1.2 Communication

Communication types in VANETs can be categorized into four types. The
category is closely related to VANETs components as described above. Figure 3
describes the key functions of each communication type.

1.2.1 In-vehicle communication, which is more and more
necessary and important in VANETs research, refers to the in-vehicle domain.
In-vehicle communication system can detect a vehicle’s performance and
especially driver’s fatigue and drowsiness, which is critical for driver and
public safety.

1.2.2Vehicle-to-vehicle (V2V) communicationcan provide a data exchange
platform for the drivers to share information and warning messages, so as to
expand driver assistance.

1.2.3Vehicle-to-road infrastructure (V2I)
communicationis another useful research field in VANETs. V2I communication enables
real-time traffic/weather updates for drivers and provides environmental
sensing and monitoring.

1.2.4 Vehicle-to-broadband cloud (V2B)
communication means that vehicles may communicate via wireless broadband mechanisms
such as 3G/4G. As the broadband cloud may include more traffic information and
monitoring data as well as infotainment, this type of communication will be
useful for active driver assistance and vehicle tracking.

Fig 1.4 Key functions of each communication type.







1.3 Wireless Access Technology in VANET

Distinctive innovations
are accessible to execute VANET related uses of street wellbeing and activity
advancement. These assistance vehicles to convey among each other and RSU’s.
VANET utilizes short range remote correspondence in light of IEEE 802.11p
standard or Wi-Max IEEE 802.16 for sharing data among vehicles in an impromptu

IEEE 802.11p
is an overhauled form or revision to the IEEE 802.11 models to make it good to
vehicular condition by including remote access in vehicular situations (WAVE).
The trading of data among vehicles and street side foundation is done in
authorized ITS band of 5.9 GHz (5.85-5.925 GHz).

IEEE 802.16
is a progression of remote models made by the Institute of Electrical and
Electronics Engineers (IEEE).


1.4 Application Of VANET

As proposed by the majority of vehicle makers there
are numerous applications imagined for VANETs. The zone of these applications
is wide yet it can be talked about in three distinct classifications

1.4.1 Safety
Applications These applications basically concentrate on decrease
in street mishaps, maintaining a strategic distance from impact and diminishing
death toll of people driving in vehicles. VANETs furnish drivers with
auspicious data so they can forestall perilous mishaps. Consequently legitimate
operation of these applications ought to be compulsory. Inhabitants of vehicles
trade data about the speed, position of the vehicle or any up and coming
dangerous area to get security out and about.

1.4.2 Traffic
optimization and Location Based ServicesThis application manages limiting movement clogs and helping driver to
discover best course to goal. It enhances activity’s stream, co-appointment and
help. It does as such by giving data with respect to street condition, maps and
pertinent messages required time to time.

Infotainment ApplicationsVANET covers wellbeing application as well as data and
excitement application also. The drivers and travelers can appreciate
Infotainment applications, for example, office of web network regardless of
whether different remote web availability choices are not accessible. VANETS
offer applications, for example, surfing, sharing documents, playing gaming,
visiting, finding closest eating joints, theater, petroleum pump or closest
stopping accessibility.


1.5 Challenges

The ebb and flow key research test of VANETs is the
absence of focal correspondence co-ordinator related with all the current
remote access innovations reserved for VANET set-up, usage and arrangement.
Despite the fact that VANET is a type of MANET, its conduct and qualities are
essentially unique. A portion of the essential VANET inquire about difficulties
that must be routed to accomplish successful vehicular correspondence are
examined beneath.

1.5.1 Comparison of High-Speed Wireless Communication
Technologies for Vehicular NetworksSome rapid
remote access advancements and models have been proposed, prescribed and
considered for use in VANET network by numerous analysts. A portion of the advancements
and air interface conventions equipped for supporting fast correspondence in
vehicular condition which are right now being considered for VANETs incorporate

technology – (2G, 2.5G …4G):The 2G and 2.5G advancements give dependable security and wide
correspondence scope while 3G and 4G innovations which are quickly assuming
control offer exceptionally enhanced correspondence limit and transfer speed.
In USA, Europe and Japan, many armada and telematics ventures are as of now
utilizing distinctive ages of cell innovation. Be that as it may, the obvious
high cost combined with its high dormancy rate and restricted transmission
capacity debilitates its conceivable use as future correspondence base for

Draft IEEE 802.11p based standards:ASTM and IEEE-embraced draft is a variety of IEEE
802.11 family intended to help remote correspondence in vehicular condition.
This air interface convention is a work-in-advance by IEEE Working Group that
would give between vehicle correspondence (IVC) and vehicle-to-roadside
correspondence at vehicular speed running from 200 to 300km/h covering
correspondence scope of 1000m. The medium access control (MAC) and physical
(PHY) layers depend on IEEE 802.11a. IEEE 802.11p innovation is intensely advanced
by vehicle fabricating enterprises over the globe particularly in USA through
VII and VSCC, Japan through Advanced Safety Vehicle venture (ASV), Europe
through C2C-CC and Germany through SeVeCOM. Because of significant generation
volumes, the evaluated arrangement cost of IEEE 802.11p is anticipated to be
moderately low when contrasted and cell innovation. Thus, this early innovation
likewise called WAVE has an edge over cell advancements and genuinely more
reasonable for VANETs.

Message Broadcasting in Vehicular NetworksThe conceived VANET applications require transmission, assembling and
handling of extensive volume of electronic messages/information parcels.
Message broadcasting has been viewed as an alluring elective arrangement via
car remote systems administration analysts somewhat because of its minimal
effort and halfway because of its help for huge potential volumes of
information bundles. Henceforth, a few telecom strategies and systems have been
thought about by numerous scientists. These methods incorporate confined and
unlimited transmission capacity advanced administration arrangements and
additionally satellite telecom arrangement which has effectively fused constant
movement information administrations.

VANETs Routing Protocols:Much research has been completed on the
appropriateness of MANET steering conventions in VANETs and additionally a few
other research studies. Oppositely, the regular system dividing (discontinuous
system availability) because of greatly powerful topology and high versatility
in VANET render MANET conventions unsatisfactory for vehicular correspondences.
Additionally, the suppositions in MANET directing that conclusion to-end
arrange network can be built up constantly, and that transitional hubs amongst source
and goal can simply be found can’t hold in VANET. Thus, where the previously
mentioned presumptions don’t hold in VANET, the convey and forward approach was
proposed in for VANETs whereby a moving vehicle persistently convey an
information bundle until the point when it is sent to another vehicle nearer to
the goal without any immediate course.

Power Control and AdjustmentPower administration in the feeling of vitality
effectiveness isn’t an issue in VANETs similar to the case with other developing
remote advances, for example, LTE because of the presence of introduced
batteries in the vehicles. Be that as it may, control administration in term of
transmission control is a testing issue that must be made plans to accomplish
compelling vehicular correspondence. In a thick vehicular system, high
transmission power could prompt disturbance of a continuous transmission with
another transmission at a removed vehicle because of impedances.

1.5.5 Security, Privacy, Anonymity and LiabilitySecurity is one of the difficulties that requests
watchful consideration preceding outlining and organizations of VANETs in our
motorways. A few potential dangers to vehicular correspondence framework exist,
running from counterfeit (or false) messages fit for disturbing activity or
notwithstanding making peril driver’s protection attack. Structures must be
worked out to empower vehicles accepting information bundles from different
vehicles (or system hubs) to have the capacity to build up trust on the
substances transmitting the parcels while the security of the drivers are
ensured utilizing unknown hub characters.

1.5.6 Accident Severityaccumulation of data accessible when an auto collision
happens, which is caught by sensors introduced locally available the vehicles
and in light of that data computing the mischance seriousness. The information
gathered are organized in a bundle, and sent to a remote-Control Unit through a
mix of V2V and V2I remote correspondence.

1.6 Motivation

Broadcasting techniques are associated with broadcast storm problem. This problem
could be reduced or eliminated by reducing the message broadcast range
specifically to the site of interest thereby reducing the unnecessary network
overhead. Another approach that has emerged as a promising solution is clustering approach where
neighbouring mobile vehicles form clusters, manageable groups which limit the
message broadcasting range. Several cluster-based VANETs broadcasting protocols
have been proposed as is the case in 10 11. Different cluster based
technique is used but broadcast storm can also be manageable through relay
nodes. So, we will try the different approach for broadcast storm problem. 

One of the most important modules in the Control Unit
is in charge of the Accident SeverityEstimation, i.e., providinga relative
measure of the potential effect of the collision on the integrity of the
vehicles and people involved. Toobtain this estimationManuel
Fogue and Piedad Garrido 9 proposed aPreviously use of historical information about
previous accidents contained in an existingdatabase, through a process of
Knowledge Discovery in Databases (KDD) but this method is
not providing exact situation of the accident severity at that point of time.

1.7 Objective

Our main objective is tell the severity of the
accident with the help of different sensors that are available in the vehicle.

And disseminate the information about the accident to
near by vehicle and to nearest Road Side Units so that RSUs can inform to Base
Station and Base Station will inform the emergency services (ambulance, police,
insurance etc) according to the severity of accident using less bandwidth.