e-road project an overview pravin shankar [email protected]
Post on 20-Dec-2015
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Outline
Introduction E-Road Vision TrafficView On-demand Traffic Query Protocol Enhancements to MAC layer Hybrid Vehicular Network Architecture
Outline
Introduction Vision TrafficView On-demand Traffic Query Protocol Enhancements to MAC layer Hybrid Vehicular Network Architecture
Introduction
Vehicular networkingReduce accidentsStreamline trafficProvide rich multimedia application support
VANETs – specific instance of MANETs FCC – 5.9GHz DSRC band Related work
Outline
Introduction E-Road Vision TrafficView On-demand Traffic Query Protocol Enhancements to MAC layer Hybrid Vehicular Network Architecture
The E-Road Vision
To design an intelligent transportation system to revolutionize the way we drive by supportingCollaborative traffic information exchangeEmergency/Safety Message DisseminationOn-demand Traffic Conditions monitoringDynamic Route PlanningRich multimedia distribution
Outline
Introduction E-Road Vision TrafficView On-demand Traffic Query Protocol Enhancements to MAC layer Hybrid Vehicular Network Architecture
TrafficView – Look beyond your eyes
What’s in What’s in front of front of
that bus ?that bus ?
What’s What’s behind behind
the the bend ?bend ?On rainy days
On foggy daysOn foggy days
TrafficView
Vehicular Adhoc Networks (VANETS)
Each node consists of: Embedded Computer GPS device IEEE 802.11b/g WiFi
Augmented with amplifier and antenna
TouchScreen UI
Prototype Implementation
Implementation in Java and OpenGL
Works on Windows and Linux, PCs and iPAQs
Research Issues in TrafficView
Aggregation
Put as much data as possible in one packet
Perform more aggregation as distance increases Validation
Information received could be incorrect – either malicious neighbor, or malfunctioning neighbor
Perform data cleansing, and aging of records GPS Position Accuracy
GPS devices have accuracy of 20 m (3 m with D-GPRS) Use collaborative correction information to improve accuracy without
requiring infrastructure (like WAAS) or specialized devices (like gyroscope).
Outline
Introduction E-Road Vision TrafficView On-demand Traffic Query Protocol Enhancements to MAC layer Hybrid Vehicular Network Architecture
On-demand Traffic Query Protocol
VITP – Vehicular Information Transfer ProtocolAn information transfer protocol for vehicular
computing Location-sensitive queries and replies between
nodes of a VANET VITP Peers – nodes that operate as clients,
intermediates, or servers Location encoding and Geographical Routing
Outline
Introduction E-Road Vision TrafficView On-demand Traffic Query Protocol Enhancements to MAC layer Hybrid Vehicular Network Architecture
Enhancements to MAC layer
DSRC 5.9 GHz Licensed Spectrum IEEE 802.11 unsuitable for the network
conditions posed by VANETs High Vehicle Mobility Priority of Services Cross-layer awareness
Outline
Introduction E-Road Vision TrafficView On-demand Traffic Query Protocol Enhancements to MAC layer Hybrid Vehicular Network Architecture
Hybrid Vehicular Network Architecture
What happens when a wifi link fails? Use alternate communication links, eg. GPRS/3G
when network partitions When to switch between the two?
Wifi – high bandwidth, low latency, free, but unreliable GPRS/3G – low bandwidth, high latency, expensive,
but reliable Design an intelligent MAC layer which switch
between these two medium based on network conditions and application demands.
Thank you!
http://discolab.rutgers.edu/traffic/