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Transcript of vinod_mae
Vehicular web server for road safety
V. Sundeep (1604-10-737-046)
Javad khalili (1604-10-737-061)
Sultan moshsen adwah aldini(1604-09-737-162)
project guide
Mr. Mohammad Pasha
Motivation: Scenario IImagine traveling on a highway with traffic jam miles ahead…
Can we do better?
• Data delivery latency is high• High deployment cost for data collection
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So what kind of a system do we need? Desirable system properties
Data collection and distribution in a local environment Low information delivery latency Cheap deployment and communication
Probable solutions Cellular ? Service fees Satellite ? High latency Vehicular Networks ?
What is a vehicular network? Vehicles are equipped with sensing, computing and wireless devices Vehicles talk to road-side infrastructure (V2I) and other vehicles
(V2V) Has all the desirable properties
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Outline
Vehicular Networks and Applications Research overview Mobility models and simulators(introduction) Data dissemination approaches and tradeoffs
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Vehicular Networks
What does road-side infrastructure (Infostation) mean? High bandwidth & Low cost device Coverage is less compared to a cellular base station
Advantages of infrastructure support Low latency communication with vehicles Gateway to the Internet and extend connectivity Distributing time-critical data (e.g. accident notifications,
traffic jam) near the affected area is efficient
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Applications & Challenges
Lots of potential applications Safety: Emergency brake light, Collision warning etc Comfort: Toll services, Parking space locator etc Commercial: Map updates, Video download, Services etc
What makes vehicular networks challenging? Combination of V2V + V2I communications They face the ‘worst case’ scenarios in real world
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Who all are working on vehicular networks?
Automobile Industry
Projects• Vehicle to Infrastructure test-bed, SFO• PATH, CarTel, DieselNet (USA)• FleetNet, NOW, CarTalk2000 (Europe)
State-of-the-art
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US DOT
Research on Vehicular Networks: The BIG Picture
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Openxc
What is Openxc? How does it work?
Android Tool Kit
The Android SDK provides you the API libraries.
It also provides developer tools necessary for : Building testing debugging apps for Android.
Eclipse a multi-language Integrated development environment It can be used to develop applications in Java
Features:
It can be used for developing web applications.
I-Jetty
pure Java-based HTTP server and Java Servlet container developed as a free and open source project
FEATURES:Simplicity
Embeddability Pluggability
How does it work?
Proposed system
Data Dissemination
Characteristics High mobility Dynamic topology Receivers are a priori
unknown Large scale High density Low penetration ratio
Challenges Maintaining routing tables
is difficult
Scalability
Dealing with partitions
Vehicular networks need to handle large amounts of data (emergency messages, videos etc)
How do we efficiently disseminate this information?
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Classification of Dissemination Approaches V2I / I2V dissemination
Push based Pull based
V2V dissemination Flooding
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Push based dissemination
Infostation pushes out the data to everyone Applications: Traffic alerts, Weather alerts
Why is this useful? Good for popular data No cross traffic Low contention
Drawback Everyone might not be interested in the same data
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Pull based dissemination
Request – Response model Applications: Email, Webpage requests
Why is this useful? For unpopular / user-specific data
Drawback Lots of cross traffic Contention, Interference, Collisions
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Flooding
Basic Idea Broadcast generated and received data to neighbors Usually everyone participates in dissemination
Advantages “Good” for delay sensitive applications Suitable for sparse networks
Key Challenges How to avoid broadcast storm problem?
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Techniques to avoid the broadcast problem Simple forwarding
Timer based Hop limited
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Drawbacks / Limitations of Flooding Flooding in general
High message overhead Not scalable
Take AwayV2I/I2V Dissemination Pros Cons
Push Suitable for popular data Not suitable for un-popular data
Pull Suitable for un-popular/ user-specific data
Cross traffic incurs heavy interference, collisions
V2V Dissemination Pros Cons
Flooding Can reliably & quickly distribute data
Not scalable for dense networks
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System requirements
HARDWARE REQUIREMENTS: RAM-2GB SYSTEM TYPE:32-BIT OPERATING SYSTEM PROCESSOR:INTEL CORE DUO 2 SOFTWARE REQUIREMENTS: WINDOWS VISTA ANDROID SDK I-JETTY OMNET++
conclusion
As it is an experimental model and some simulations are required so hence this will be help full for interaction of two cars so that they can access the data easily by using an android mobile phones.
Thank You for Listening
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References [Nadeem’06] Comparative study of data dissemination models for vanets, Mobiquitous. [Wu’04a] MDDV: A Mobility-Centric Data Dissemination Algorithm for Vehicular
Networks, VANET. [Korkamaz’04] Urban multi-hop broadcast protocol for inter-vehicle communication
systems, VANET. [Sun’00] GPS-Based Message Broadcasting for Inter-Vehicle Communication, ICCPP. [Zong’01] Ad Hoc Relay Wireless Networks over Moving Vehicles on Highways,
Mobihoc. [Wu’04b] Analytical Models for Information Propagation in Vehicle-to-Vehicle
Networks, VTC. [Linda’00a] Disseminating Messages among Highly Mobile Hosts based on Inter-
Vehicle Communication, IV. [Sormani’06] Towards Lightweight Information Dissemination in Inter-Vehicular
Networks, VANET [Zhao’06] VADD-Vehicle-Assisted Data Delivery in Vehicular Ad Hoc Networks,
INFOCOM. [Caliskan’06] Decentralized Discovery of Free Parking Spaces, VANET [Basu’04] Wireless Ad Hoc Discovery of Parking Meters, WAMES. [Zhao’07] Data Pouring and Buffering on The Road: A New Data Dissemination
Paradigm for Vehicular Ad Hoc Networks, Transactions on VT
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