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Wireless traffic service platform for combined vehicle-to-vehicle and
vehicle-to-infrastructure communications
Authors : T. Sukuvaara and P. Nurmi
IEEE Wireless Communications, Vol 16, pp. 54 - 61 , December 2009
Speaker : 蔡明信
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Introduction
Related work
Platform and services
System description
Technical requirements
Available wireless technologies
Performance analysis and discussion
Conclusions
outline
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The vehicle-to-vehicle (V2V) communication platform is currently a popular research topic
Traffic safety enhancement is the driving factor in many approaches,sensor data from vehicles and roadside units is used for providing accident and/or weather warnings to roadside units and vehicles.
Introduction
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The capability for continuous communication is an important
goal.
In the carlink project the aim was to build more comprehensive
solution for vehicle-to-infrastructure (V2I) and V2V
communication purposes.
Employed hybrid communication of general packet radio
service (GPRS) and wireless networking.
Introduction
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Wireless networking stands for the ultimate communication platform, while GPRS’s primary purpose is to provide an alternate communication solution.
The simulations, pilot testing, and analysis evaluate the basic communication efficiency of the platform.
Introduction
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In the United States the Department of Transportation is coordinating the Vehicle Infrastructure Integration (VII) program.
The European (Cooperative Vehicle Infrastructure Systems)CVIS project generates an open standards-based communication.
Related work
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The main advantages of carlink are the open platform solution, the flexibility and scalability of the platform into different types of services and capacity communication requirements, and operation reliability based on dual radio communications.
Related work
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The Carlink platform is designed to provide an infrastructure to a wide community of commercial and governmental traffic and safety services.
Platform and services
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The wireless traffic service platform is divided into three parts:
1. Traffic service central unit (TSCU)
2. Traffic service base stations (TSBSs)
3. Mobile end users (MEUs)
Platform and services
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Carlink services.
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Operational model of local RWS and incident warning service.
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Schematic of the road weather model.
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The TSCU is on the top with connections to the underlying service cores , it also stores all data gathered from the platform and forwards the appropriate data to services.
Road weather service(RWS) core includes a weather forecast model
System description
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The parameters gathered from the vehicle are the temperature, car throwing indicator, car sudden braking indicator, airbag blast notification
The WLAN/WiMAX and GPRS interfaces are used for communication with the TSBSs and TSCU.
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Carlink platform structure
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The traffic speed (up to 100 km/h in our scenario) generates an extremely challenging element
Ad-hoc networking with handoff and seamless continuation of communication are important issues required in the final operative system.
Technical requirements
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The most popular solution for wireless communication is the Wi-Fi system, which is based on the IEEE 802.11 standard family.
IEEE 802.11p represents the ultimate future solution
Technical requirements
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wireless ad hoc communication between vehicles
ensure that the most crucial data will also be exchanged in the platform without any delay when there are no TSBSs nearby.
Technical requirements
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WLAN :
Wi-Fi
WiMAX
Available wireless technologies
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Two main simulation :
1. One-way traffic scenario
2. Bidirectional traffic scenario
PERFORMANCE ANALYSIS AND DISCUSSION
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Conditions : four or eight vehicles are traveling at 100 km/h speed
The distances between consecutive vehicles were fixed
to 100 m
PERFORMANCE ANALYSIS AND DISCUSSION
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Main results of the simulations
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Presented the carlink concept of a hybrid wireless traffic service platform between cars
Showcases a true bidirectional communication entity
Analyzed and forecast information about road weather conditions and immediate incident warnings.
Conclusions
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Decrease accidents and lives lost in traffic.
The ultimate goal was to create an intelligent communication platform.
Conclusions