how vehicular ad hoc networks serves smart city (beihang university)
DESCRIPTION
Chinese-French meetings on smart cities in Issy-les-Moulineaux (March 2014)TRANSCRIPT
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BUAA
How Vehicular Ad hoc Networks Serves Smart
CityDr Juhua Pu
Beihang University
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Guideline
What is VanetWhy we need VanetResearch hot spot of VanetVanet and Smart City
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What is Vanet
Vanet: Vehicular Ad hoc Networks
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What is Vanet
for easy and effective communication between vehicles with dynamic mobility uses WiFi IEEE 802.11 and WiMAX IEEE 802.16
a form of Mobile ad-hoc network Dynamic but not random mobility moving in an organized fashion
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What is Vanets
Providing V2V and V2I communications V2V: Vehicular to Vehicular communications V2I: Vehicular to Infrastructure communications
Widely used traffic safety comfort of driving and traveling ……
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Guideline
What is VanetWhy we need VanetResearch hot spot of VanetVanet and Smart City
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Why Vehicular Networks?
• Safety Traffic accident
• Millions of Fatalities and Injuries(US2004: 42,800 vs. 2,800,000)
• Thousands of Billions cost to society(US2004:230.6 billions)
Traffic jams• Traffic jams generate a tremendous waste of time and of
fuel• Also increasing the pollution
Most of these problems can be solved by providing appropriate information to the driver or to the vehicle
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Efficiency Traffic jams waste time and fuel In 2003, US drivers lost a total of 3.5 billion hours
and 5.7 billion gallons of fuel to traffic congestionProfit
Safety features and high-tech devices have become product differentiators
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Examples
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Research institute and system
TrafficViewFleetNet & NOWCarTelMobeyesCAR2CARIntelliDrive
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Guideline
What is VanetWhy we need VanetResearch hot spot of VanetVanet and Smart City
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Research Hot spot
FrameworkConnectivityMobility modelRoutingData managementSafety and securityapplications
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routing
Single cast vs. Multicast vs. BroadcastSingle hop vs. multi hopStorage-carry-forward
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Broadcast in heterogeneous Vanet
directional broadcast (DBroadcast)regional broadcast (Rbroadcast)
C
D
G
H
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Broadcast storm
Three main issues for broadcast in Vanet
1504/11/2023
network
partition
intersection
broadcast
storm partitionintersctio
nDBroadcast √ √ —
RBroadcast √ √ √
A
Beihang University
AB
C F
D
H
G
E
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Heterogeneous Vanets
Each vehicle has different communication radius Vehicle changes proactively Signal block etc. Equipment Heterogeneity by Manufacturers ……
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S A B C
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Heterogeneity and the three main issues
Broadcast storm
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Heterogeneity and the three main issues
Network partition
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Heterogeneity and the three main issues
Intersection broadcast
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Non-Redundant Communication RangeNon-Redundant Communication Range, NRCR
Broadcast storm
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Isomeric Forward, IF
Receiving HELLO message
Receiving EVENT message
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A’s driving along EVENT
forward direction
B’s driving along EVENT
forward direction
B is farther than A along
EVENT forward direction
EVENT typeCase no.
What to do
× × √ — aA changes to non-tail
node
× × ×BROADCAST_NORMAL b ignore
BROADCAST_TO_RELAY bA changes to non-tail
node
× √ — — c,dA changes to non-tail
node
√ × √BROADCAST_NORMAL e
A changes to non-tail node
BROADCAST_TO_RELAY e Need more calculation√ — × — f,h ignore
√ √ √ — gA changes to non-tail
node
B’s driving along EVENT forward
direction
B is farther than A along EVENT forward
directionCase no. What to do
√ — c,dSet EVENT type as BROADCAST_TO_RELAY and
broadcast. A changes to non-tail node
× √ aSetting EVENT type as BROADCAST_NORMAL and
broadcast. A changes to non-tail node× × b ignore
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Isomeric Carry, IC
BROADCAST_NORMAL EVENT
BROADCAST_TO_RELAY EVENT
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B Carrying B not Carrying
B Carrying B not Carrying
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Isomeric Intersection Broadcast,IIB
Intersection Delay
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Loc. of sending
node
Loc. of receiving
node
What to do(sending)
Receiving node gotten this
EVENTWhat to do(receiving)
intersection intersectionintersection
delay —
carrying , directional broadcast while approaching intersection(farther than
communication radius)
intersectionBidirection
roadintersection
delay
√ ignore
×carrying , directional broadcast while approaching intersection(farther than
communication radius)Bidirection
roadintersection
Directional broadcast
√ ignore× Intersection delay
Bidirection road
Bidirection road
Directional broadcast
—Directional broadcast in the same road
but block in different raods
Loc. of sending
node
Loc. of receiving
node
What to do(sending)
Receiving node gotten this
EVENTWhat to do(receiving)
intersection Intersectionintersection
delay
√carrying , directional broadcast while approaching intersection(farther than
communication radius)
×carrying , directional broadcast while approaching intersection(farther than
communication radius)
intersectionBidirection
roadintersection
delay
√ ignore
×carrying , directional broadcast while approaching intersection(farther than
communication radius)Bidirection
roadIntersection
Directional broadcast
√ ignore× Intersection delay
Bidirection road
Bidirection road
Directional broadcast
√Directional broadcast in the same road
but block in different raods
×Directional broadcast in the same road
but block in different raods
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Evaluation(DBroadcast)
5 vpkm & 50 vpkm
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Evaluation(Rbroadcast)
5 vpkm & 50 vpkm
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Data management
教师试讲-学术报告
Beihang University
Networks
character
Simuplatform
Replica Deletion
Data
Transmission
Data Management
Multicast
Cooperative data dissermination
Replica Deletion
DTN+Vanet
MPEB, E-MPEB
COTS
SuDA, RAD
BHU-VSim
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Guideline
What is VanetWhy we need VanetResearch hot spot of VanetVanet and Smart City
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Applications for VANETs
Public Safety ApplicationsTraffic Management ApplicationsTraffic Coordination and Assistance
ApplicationsTraveler Information Support ApplicationsComfort ApplicationsAir pollution emission measurement and
reductionLaw enforcementBroadband services
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Applications (details)
• Congestion detection• Vehicle platooning• Road conditions
warning• Collision alert• Stoplight assistant• Emergency vehicle• warning
• Deceleration warning• Toll collection• Border clearance• Adaptive cruise control• Drive-through payment• Merge assistance
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Vanets and smarty city
Vanets can be an infrastructure of data collection for smart city
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100,000 vehicle-mounted sensors covering the whole roads in the metropolis
More than 100,000 road links of all kinds of complexity level Handle more than 500,000 GPS position points and related
parameters each cycle
Telematics-floating cars based information services system
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Show real-time traffic situation and congestion of the metropolitan road network in China for the first time Provide users with local micro-city traffic information for the first time The services include international well-known car company , mobile terminal manufacturers , mobile operators and internet companies.
2005
The first domestic internet dynamic traffic information service:
Bei Jing Public transportation
websiteThe first domestic
value-added mobile data
service of dynamic traffic
information
2006 2007
The first navigation equipment MIO C320T
Carrying dynamic traffic information service
2008
The first Vehicle dynamic traffic information service:Nissan Teana
First nationwide multi-city Roaming serviceOf dynamic traffic information :Beijing、 Shanghai、 Guangzhou、 Shenzhen
First mobile internet dynamic navigation service
2009
The first domestic dynamic traffic service based on portals
Dynamic traffic information service
serve Olympic successfully
2010The first domestic dynamic navigation equipment
First vehicle interactive dynamic navigation service: G-BOOK
Dynamic traffic information service serve Shanghai World Expo
FAW、 SAIC、 Toyota、 nissan、BMW、 G.M.
The Milestone of Industrialization
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宁波
沈阳
天津
成都南京
重庆
泉州
福州
台州温州
昆明
济南
长沙
武汉
南昌
合肥郑州
西安
太原
苏州
北京
上海
广州
深圳
石家庄 大连
青岛
杭州无锡
贵州省
广西省
甘肃
西藏
新疆
呼和浩特
宁夏青海
吉林省
黑龙江省
金华
Content Sub-content Current Status Nr
Basic Contents
Traffic Flow and Prediction
Real-time Information
Beijing 、 Shanghai 、 Guangzhou 、 Shenzhen 、 Chengdu 、 Chongqing 、 Nanjing 、 Ningbo 、ShenYang 、 Tianjin 、 Suzhou 、 Fuzhou 、 Qingdao 、 Shijiazhuang 、 Changsha 、 Huhehaote
、 Dongguan 、 Foshan, 、 Chongqing 、 Nanjing 、 Fuzhou 、 Kunming 、 Quanzhou 、 Taizhou 、 Wuxi 、 Zhongshan 、 Jinhua 、 Wuhan 、 Wenzhou 、 Xiamen 、 Changchun
33
Prediction Information Beijing 、 Shanghai 、 Shenzhen 3
Traffic Event Beijing 、 Shanghai 、 Guangzhou 、 Shenzhen 、 TianJin 5
Content Current Status Nr
Advanced Contents
Parking Information Shanghai 1
Creative Traffic Information Representation Current Status Nr
Simplified Graphic Traffic Information Beijing 、 Shanghai 、 Guangzhou 、 Shenzhen 4
•2008 : 4 metros of BeiJing, ShangHai,
GuangZhou, ShenZhen
•2009 : Increasing 6 cities:
•2010 : Increaseing 12cities
•2011 : Increaseing 10 cities, major inter-
connecting motorways of China
东莞佛山
Service Coverage
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ES240/350 RX350/450h LX 570 Crown Camry
Terminal
Telecom operators
TEANAG25/37 Sedan G37 Coupe G37 Convertible EX25/35
Websites
IOV/Telematics service
LS600HL
Manufacturers
• Providing data to Toyota, Nissan, GM and other brand • Providing data to mobile devices made , such as Jiaming, Nokia and other manufacturers. • Providing data to China Mobile and China Telecom's • The real-time traffic services provided by them have reaches to millions.
Industry Customer
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