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Chinese-French meetings on smart cities in Issy-les-Moulineaux (March 2014)
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BUAA
How Vehicular Ad hoc Networks Serves Smart
CityDr Juhua Pu
Beihang University
Guideline
What is VanetWhy we need VanetResearch hot spot of VanetVanet and Smart City
What is Vanet
Vanet: Vehicular Ad hoc Networks
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
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 ……
Guideline
What is VanetWhy we need VanetResearch hot spot of VanetVanet and Smart City
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
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
Examples
Research institute and system
TrafficViewFleetNet & NOWCarTelMobeyesCAR2CARIntelliDrive
Guideline
What is VanetWhy we need VanetResearch hot spot of VanetVanet and Smart City
Research Hot spot
FrameworkConnectivityMobility modelRoutingData managementSafety and securityapplications
routing
Single cast vs. Multicast vs. BroadcastSingle hop vs. multi hopStorage-carry-forward
Broadcast in heterogeneous Vanet
directional broadcast (DBroadcast)regional broadcast (Rbroadcast)
C
D
G
H
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
Heterogeneous Vanets
Each vehicle has different communication radius Vehicle changes proactively Signal block etc. Equipment Heterogeneity by Manufacturers ……
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Beihang University
16
S A B C
Heterogeneity and the three main issues
Broadcast storm
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Beihang University
17
Heterogeneity and the three main issues
Network partition
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18
Heterogeneity and the three main issues
Intersection broadcast
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Beihang University
19
Non-Redundant Communication RangeNon-Redundant Communication Range, NRCR
Broadcast storm
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Beihang University
20
Isomeric Forward, IF
Receiving HELLO message
Receiving EVENT message
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Beihang University
21
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
Isomeric Carry, IC
BROADCAST_NORMAL EVENT
BROADCAST_TO_RELAY EVENT
04/11/2023
Beihang University
22
B Carrying B not Carrying
B Carrying B not Carrying
Isomeric Intersection Broadcast,IIB
Intersection Delay
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Beihang University
23
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
Evaluation(DBroadcast)
5 vpkm & 50 vpkm
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Beihang University
24
Evaluation(Rbroadcast)
5 vpkm & 50 vpkm
04/11/2023
Beihang University
25
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
Guideline
What is VanetWhy we need VanetResearch hot spot of VanetVanet and Smart City
Applications for VANETs
Public Safety ApplicationsTraffic Management ApplicationsTraffic Coordination and Assistance
ApplicationsTraveler Information Support ApplicationsComfort ApplicationsAir pollution emission measurement and
reductionLaw enforcementBroadband services
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
Vanets and smarty city
Vanets can be an infrastructure of data collection for smart city
04/11/2023
Beihang University
30
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
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
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
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