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V2V COMMUNICATION

Contents
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Introduction
V2V Communications
V2V Applications
V2V Communications for Safety
Technologies

Introduction
Vehicle Communication Systems:


This systems are an emerging types of networks in which vehicles and roadside
units are the communicating nodes:

- to provide each other as information, such as safety warning and traffic
information
...

 The system will use a region of the 5
...
11p for various public safety services
 V2V is currently in active development by General Motors, which
demonstrated the system in 2006 using Cadillac vehicles
...

 It is Fast and Reliable and provides real time safety
 It does not need any roadside Infrastructure
...
9 GHz

It is designed to facilitate communication at distances of up to 1 km
...


Applications
 Safety related: collision avoidance, cooperative merging, etc
 Incident report: dissemination of data regarding accidents on the network or
breakdown/ blockage of a link, etc
 Route Guidance: en-route guidance about the shortest path, route guidance
for gas stations, etc
 Miscellaneous: green light prediction, parking space availability, etc
...

 By exchanging anonymous:
o vehicle-based data regarding position, speed, and location
 Enables a vehicles to:
o sense threats and hazard with a 360 degree awareness of
the position of other vehicles
...


V2V Communication for Safety
Example : Hazard Warning
 Vehicles that are in a traffic jam and turned on their hazard warning lights,
communicate this information back to other Vehicles

 This information is much more accurate and reaches upcoming traffic
faster than conventional methods

V2V Communication for Safety
Example : Accident Warning
 Vehicles that are involved in an accident are the most
reliable source of information about the very fact that
there is an accident
 If vehicles involved in an accident are equipped with
short-range communication, they can send out a
warning message to the following traffic e
...
to avoid
mass collisions
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V2V Communication for Safety
Example : Emergency Vehicle Warning
 Approaching emergency vehicles send out a warning message to warn
vehicles that are in its vicinity
 Receiving vehicles can automatically mute the radio or the hands free-phone
and give an audible or visual warning message to the driver

V2V Communication for Safety
Example : Traffic Signal Violation Warning
 Vehicles can be warned about an imminent change of a traffic light and if they are in
danger of running a red light
 Traffic lights can send out their timing and phase to prevent red light violations and
potential accidents

V2V Communication for Safety
Example : Adaptive Cruise Control
 This system is effective when the adaptive cruise control fails to perform

correctly due to the radar's line-of-sight scanning
...


V2V Communication for Safety
 According to the National Highway Traffic Safety Administration (NHTSA),
76% of car accidents could be prevented with the help of V2V communication
technology
Large number of cars on the road must be equipped
...

 V2V communication technology uses Dedicated Short Range
Communications (DSRC), which in the US utilizes a 75-MHz bandwidth at a

frequency of 5
...


Technologies
• WSN (Wireless sensor networks) - consists of spatially distributed
autonomous sensors to monitor physical or environmental
conditions, such as temperature, sound, vibration, pressure,
humidity, motion or pollutants and to cooperatively pass their data
through the network to a main location
• VANET (Vehicular Ad hoc Networking) – enables communication
over multiple wireless hubs, but not necessarily including roadside
access points
...


Technologies

DSRC (Dedicated Short Range
Communication)
 The new tech combines Wi-Fi and GPS to create a new form of
communication known as DSRC
...


Technologies

DSRC (Dedicated Short Range
Communication)
 DSRC is a multi-channel wireless standard that based on the IEEE 802
...
11 MAC
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9 GHz band
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850 – 5
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Separation

10m

Technologies
VANET (Vehicle Ad hoc Networking)
 VANET is a technology that uses moving cars as nodes in a network to create
a mobile network
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11p, WAVE IEEE 1609, WiMAX IEEE 802
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Technologies
VANET (Vehicle Ad hoc Networking)
 VANET turns every participating car into a wireless router or node, allowing
cars approximately 100 to 300 metres of each other to connect
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VANET consist of some sensors embedded on the vehicles
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VANET can also be helped by some of Roadside Units like Cellular Base
Stations, to distribute the data to the other vehicles

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