Transcript 幻灯片 1

Vehicle Area Network
Zhang
Ju
2014- 5-2
Outline
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Introduction to Vehicle Area Network
Protocol stack of VAN
Performance analysis
Applications
The Future
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Definition
local area network in and around a moving
vehicle
provide wireless access in vehicular
environments
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Definition
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Classification —Inter VAN , Intra (In-Vehicle) VAN [1]
Technology —Bluetooth, WIFI, 3G, Vehicle Ad-hoc Network , RFID
Standardised in ISO 11519-3
Spectrum Allocation —5.850-5.925GHZ, 7channels(USA)
vehicle-to-vehicle
safety
high-power, longer-distance
communication
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Why is VAN needed ?
Passenger needs
Traffic congestion
Real-time
Efficient
Accurate
Passenger experience
Traffic accident
Intelligent Transportation
Systems
ITS
VAN
Active road safety applications
Energy consumption
Traffic efficiency and management applications
Infotainment applications
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Intra (In-Vehicle) VAN
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Data communication network of onboard equipment
(OBE)
In-Vehicle Data Collection/Analysis Systems
In-Vehicle Communication Network [1]
Assess a driver’s behavior or a vehicle’s performance
Assist drivers to respond correctly
Infotainment
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Inter VAN
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Network of vehicles that interact with one another
and with infrastructure to transmit and receive data [2]
Include
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vehicle-to-vehicle (V2V)
vehicle-to-broadband cloud (V2B )
vehicle-to-roadside-infrastructure (V2I )
Provide
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obstacle detection
navigation data
weather conditions and accident locations
Global Internet services
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researches and projects
Partners for Advanced Transit and High-ways (PATH)
apply advanced technology
increase highway capacity
enhance public safety
reduce traffic congestion
energy consumption
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researches and projects
SafeTrip-21 (Safe and Efficient Travel through
Innovation and Partnerships for the 21st Century)
conduct demonstrations and operational tests
speed up deployment of communication/
navigation technologies
improve transportation safety
improve mobility features
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researches and projects
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Tokyo Smartway project (Japan)
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develop intelligent roads for the 21st century
enable automated driving using ITS technologies
Electronic Road Pricing project (Singapore )
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construct a comprehensive road network
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Architecture of VAN
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ITS projects, architecture and standards of VAN
depend on area [3]
OBE—On Board Equipment
SDN —Service Delivery Node
RSE —Road-Side Equipment
ENOC—Enterprise Network
Operation Center
IntelliDrive ITS architecture(USA)
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Architecture of VAN
V2B communications
In-Vehicle
service
V2I communications
V2V communications
US DOT National ITS Architecture [3]
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WAVE Protocol Stack
support the communication of data
1609.1
manage and maintain the network
 diagnostics, synchronization
 discovery and association of
neighboring devices
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1609.3
1609.4
802.2
802.11
1609.3
relations and
1609.4
1609.4
dependencies
802.11
1609.2
802.11p
802.11p
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WAVE protocol stack
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Major Involved Organizations
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American Society for Testing and Materials (ASTM)
IEEE
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IEEE 1609.1
IEEE 1609.2
IEEE 1609.3
IEEE 1609.4
The IEEE Task Group p
IEEE 802.11
ASTM E2213-03
IEEE 802.11p
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WAVE protocol stack
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IEEE 802.11p
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released in November 2010-11
Based on ASTM E2213-03
add wireless access in vehicular environments
support ITS applications
Apply to V2V and V2I
ASTM E2213-03
standard specification for telecommunications and
information exchange between roadside and vehicle systems
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WAVE protocol stack
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IEEE 802.11p —physical layer [3]
VAN Doppler spread up to 2 kHz
RMS delay spread of up to 0.8 µs
guard interval 1.6 µs
Doppler spread 156.25 kHz
low bit error rates
highly reliable communication
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IEEE 802.11p —MAC layer
prioritization of important
safety
time-critical messages
enhanced distributed channel
access
quality of service (QoS)
support
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WAVE protocol stack
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IEEE 1069.4
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—MAC layer
provide extensions to MAC
supports multichannel WAVE operations
ACI--importance and urgency of its content
0 -- regular access
1 --non-prior background Traffic
2,3 --reserved for prioritized messages
allow prioritization of
frames
Scheme of enhanced distributed channel access
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WAVE protocol stack
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IEEE 1609 [4]
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a family of standards for WAVE
architecture, organization
management structure
communication model
security mechanisms and physical access
IEEE 1069.1
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resource manager
define the communication formats (command
message and data storage formats )
mobile platforms supported
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WAVE protocol stack
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IEEE 1069.2
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security issues in WAVE
IEEE 1609 .3
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supports secure message data exchange
Define Management Information Base(MIB)
for the WAVE protocol stack
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Performance analysis
Architecture of the overhauled IEEE 802.11
implementation of the network simulator NS-2 [3]
Simulation configuration parameters
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Performance analysis
Probability of successful message reception
when only one node is sending
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Performance analysis
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Impact of vehicle density
transmission power: 20 dBm
packet generation rate:5 packets/s
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Impact of transmission rate
vehicle density: 96 vehicles/km
transmission power: 10 dBm
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Impact of transmission power
vehicle density: 96 vehicles/km
packet generation rate: 5 packets/s
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Intelligent Transportation Systems
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IVHS of America, VICS of Japan
Efficient communication
Intelligent traffic
management
information services
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Anti-collision system
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Camera + monitor or phone software [5]
Anti-collision systems using camera
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Automatic parking
automation steering wheel
operation
Detect parking
space
Distance 40cm
Ultrasonic sensor
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The Future
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combine wireless local and wide area network
technologies
IP-centric devices, sensors, signal processing, and
driver behavior analysis techniques
collect driver/car/ road data
quickly analyze and share the information
reliable and informative communication
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Reference
[1] Miad Faezipour, Mehrdad Nourani, Adnan Saeed, Sateesh Addepalli.
Progress and Challenges in Intelligent Vehicle Area Networks [J].
Communications of The ACM, 2012, 55(2): 46-56.
[2] Georgios Karagiannis, Onur Altintas, Eylem Ekici, et al.Vehicular
Networking: A Survey and Tutorial on Requirements,Architectures,
Challenges, Standards and Solutions [J]. IEEE COMMUNICATIONS
SURVEYS AND TUTORIALS , 2011, 13(4): 65-97.
[3] Y. L. Morgan. Notes on DSRC & WAVE Standards Suite: Its
Architecture, Design, and Characteristics[J]. IEEE COMMUNICATIONS
SURVEYS AND TUTORIALS , 2010, 12(4): 78-82.
[4] Hannes Hartenstein, Kenneth P Laberteaux. VANET:Vehicular
Applications and Inter-Networking Technologies [M]. John Wiley &
Sons, 2010. 15-46.
[5] http://www.iova.com.
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