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Adaptive Routing Protocol for
VANETs in City Environments using
Real-Time Traffic Information
指導教授：許子衡 教授
報告學生：董藝興 學生
作者：Arzil, S.A. ; Aghdam, .H. ; Jamali, M.A.J. ;
出處：Information Networking and Automation
(ICINA), 2010 International Conference on
Introduction
• The inter-vehicle communication (lVC) is ad
hoc and vehicle-to-roadside communication
(VRC) is through access points (roadside units).
• Both FleetNet and CarT ALK used multi-hop
communication techniques, but while
FleetNet was supported by a partial fixed
infrastructure, CarT ALK used no existing
infrastructure.
Introduction
• Therefore data dissemination in these projects
does not perform well, due to the dynamic
nature of mobile nodes in VANETs and lack of
continuous end-to-end connectivity.
• In other words, continuous end-to-end
connectivity is sporadic.
Introduction
• In such networks where end-to-end
connectivity might not exist, the store-carry
and forward (SCF) paradigm can be employed.
ARBR Protocol
• Assumptions
– We assume that every vehicle knows its
geographical position and direction through global
positioning system (GPS).
– Vehicles periodically send beacons reporting their
positions to their neighbors.
– We also assume that vehicles are equipped with
digital maps to determine which road segment or
intersection they are in.
ARBR Protocol Overview
• The ARBR protocol uses two mechanisms to
increase delivery ratio and lower delay of
delivered packets.
• These mechanisms consist of the following:
– Discovery of high quality routing path between
route-requesting vehicle and base station node
and data packet forwarding along the discovered
path.
ARBR Protocol Overview
• Path maintenance by updating routing
information of route reply packet in
intermediate nodes.
ARBR Protocol Overview
ARBR Protocol Overview
ARBR Protocol Overview
Simulation Settings
Simulation area
6000m X 4000m
Number of intersections
15
Number of vehicles
40-200
Average velocity
5-40 mls
Simulation time
10,000 s
Transmission range
250 m
Data packet size
512 Byte
Data rate
1 Mbps
Simulation Result
Simulation Result