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VEHICULAR AD-HOC NETWORK(VANET)

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• PRESENTED BY: AKASH R

• GUIDED BY: Smt. GEETHA RAJ R

• CO-ORDINATED BY: Smt. ANJU J

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Presentation outline• What is a VANET?• Intelligent transportation system• Vehicle to vehicle communication• Vehicle to infrastructure communication• Dedicated Short Range Communication • challenges • Applications of VANET• conclusion• references

A modern vehicle

F o r w a r d r a d a r

C o m p u t i n g p l a t f o r m

E v e n t d a t a r e c o r d e r ( E D R )

P o s i t i o n i n g s y s t e m

R e a r r a d a r

C o m m u n i c a t i o n f a c i l i t y

D i s p l a y

(GPS)

Human-Machine Interface

A modern vehicle is a network of sensors/actuators on wheels !A modern vehicle is a network of sensors/actuators on wheels !

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What is VANET? Vehicles Transformed into “Computers on the Wheels” or

“Networks on the Wheel” Vehicular Communication System (VCS):- Two main type of

communications Vehicle to Vehicle (V2V) Communication:-

Vehicle to Infrastructure (V2I) communication:- Advantage and Usage of VCS:- Information sharing Co-operative driving Other value added services like Navigation, internet access etc. ad-hoc means to a system of network elements that combine

to form a network requiring little or no planning

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Cont. Communication between V2V and V2I are “ad-

hoc" in nature.This special kind of communication network is

known as “Vehicular Ad-hoc Network (VANET)” VANET will become Worlds largest ad-hoc network

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Why we need VANET?

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Overview of Basic Components in VANETs• Communication:- Wireless Access in Vehicular

Environment (WAVE): IEEE 1609.2 Standard also Known DSRC 802.11p

• Supports Multi-Hop communication for vehicles out of range (Max. Range DSRC is 1000m)

• On-Board Unit (OBU):- A device which is inside the vehicle which

processes the data collected from various sensors fitted inside the cars and gives conditions of the vehicles is responsible for communication with outside network i.e with other vehicles and infrastructure.

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Cont.• Road Side Unit (RSU): Infrastructure for

communication between the cars for sharing and information from various vehicles.

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INTELLIGENT TRANSPORTATION SYSTEM

It allows safe and free flow traffic.

It uses GPS and DGPS equipped devices.

It uses various technology like:- 1. Wireless communications 2. Computational technologies 3. Floating car data/floating cellular data 4. Sensing technologies 5. Inductive loop detection 6. Video vehicle detection 7. Bluetooth Detection

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Vehicle to vehicle communicationUses multi-hop/multi cast technique. uses two type of broadcasting 1. naive broadcasting 2. intelligent broadcasting

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Vehicle to infrastructure communicationHigh bandwidth link with vehicle and roadside

equipment.Roadside units broadcast messages.

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Routing based communication• Uses multi hop unicast

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Dedicated Short Range Communication (DSRC)

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Cont.

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RoutingEach vehicle is a node with unique ID.

proactive routing • It tries to maintain routes to all destinations.

Reactive routing • It initiates route discovery in demand of data

traffic.

Position based Routing• Routing based on destination’s position.

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Broadcasting• Broadcasting algorithms used.• Data and control packet forwarding are loop free.• Ad hoc routing algorithms are used.

Mobicasting• Consider time into account.• Main goal is delivery of information to all nodes in

a point of time.

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Quality of service

• Indicates level of performance given to user.• Provide robust routes among nodes.

Security

• Many threats for Vanet.• Avoid some threats using digital signatures.

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VANET Research ChallengesRouting • Large end-to-end delays and decreased packet

delivery ratio.Security Frameworks• Need lightweight, scalable authentication

frameworks.• Need reliable and secureness .• Need fast and low-cost message exchange facility.

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cntd.Quality of Service.• QoS challenges are packet delivery ratio and

connection duration.

Broadcasting.• Most messages in Vanet are broadcast messages.• Collisions affects message delivery.

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Applications of VANET

Three major classes of applications possible in VANET are safety oriented convenience oriented commercial oriented

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CONCLUSION• Consists of vehicle-to-vehicle, vehicle-to-

infrastructure communication.

• It improves the safety of vehicles.

• Supports Intelligent Transportation system.

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REFERENCES

•Raya, M. and Hubaux, J., “The Security of Vehicular Ad Hoc

Networks”, in Proceedings of the 3rdACM Workshop on Security of Ad

Hoc and Sensor Networks (SASN 2005), Alexandria, VA,

• Harsch, C., Festag, A. & Papadimitratos, P., “Secure Position-Based

Routing for VANETs”, in Proceedings of IEEE 66thVehicular

Technology Conference (VTC-2007).

•Gerlach, M., Full Paper: Assessing and Improving Privacy in VANETs,

www.networkon-wheels.de/downloads/escar2006gerlach.pdf .

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•Jinyuan, S., Chi, Z. & Yuguang, F., “An ID-based Framework Achieving

Privacy and Non-Repudiation”, in Proceedings of IEEE Vehicular Ad Hoc

Networks, Military Communications Conference (MILCOM 2007).

•Stampoulis, A. & Chai, Z., A Survey of Security in Vehicular Networks.

•Balon, N., Introduction to Vehicular Ad Hoc Networks and the Broadcast

Storm

Problem,http://www.csie.ntpu.edu.tw/~yschen/course/96-2/Wireless/papers/

broadcast-5.pdf .

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