A FRAMEWORK FOR DYNAMIC TRAFFIC MONITORING USING VEHICULAR AD-HOC NETWORKS Hadi Arbabi PhD in Computer Science Department Of Computer Science Old Dominion University Advisor: Dr. Michele C. Weigle M.S. in Computer Science Old Dominion University, May 2007 Advisor: Dr. Stephan Olariu B.S. in Computer Engineering Shiraz University , June 2001
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A Framework for Dynamic Traffic Monitoring using Vehicular Ad-hoc Networks
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A FRAMEWORK FOR DYNAMIC TRAFFIC MONITORING USING VEHICULAR AD-HOC NETWORKS
Hadi ArbabiPhD in Computer ScienceDepartment Of Computer ScienceOld Dominion UniversityAdvisor: Dr. Michele C. Weigle
M.S. in Computer ScienceOld Dominion University, May 2007 Advisor: Dr. Stephan Olariu
B.S. in Computer Engineering Shiraz University , June 2001
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Content INTRODUCTION
Traffic Monitoring and Technologies in Use Motivations and Our Approach
nf = total number of distinct received forwarded messages received by forwardingnc = total number of distinct received carried messagesn = total number of distinct received messagestf = forwarding delay ≈ 0.0tc = carrying delay ≈ average travel timewf = nf /nwc = nc/n
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Performance Evaluation of DTMon Traffic Conditions
Free Flow Traffic Transient Flow Traffic
Transient Congestion Extended Congestion
Compare Delivery Methods Message Reception Rate Message Delay and Latency Quality of Data (estimated measurements)
Compare with Probe Vehicle-Based Systems (e.g., AVL) Fixed Point Sensors and Detectors (e.g., ILD)
Several experiments using VANET modules that we developed for the ns-3 simulator
•H. Arbabi, M. C. Weigle, "Highway Mobility and Vehicular Ad-Hoc Networks in ns-3," In Proc. of the Winter Simulation Conference. Baltimore, MD, December 2010•Highway Mobility for Vehicular Networks (Project and Google Code)• http://code.google.com/p/ns-3-highway-mobility/
impact the quality of monitored traffic data when using vehicular networks Market penetration rate Traffic conditions Communication range Distance between communicating entities Methods of message delivery Information and message reception rate Message delay
Contributions An evaluation of the impact of different
methods of message delivery on the quality of traffic data that can be gathered by vehicular networks Regular forwarding Dynamic transmission range Store-and-carry Hybrid
Comparisons Information and message reception rates Message delay (and latency) In-use technologies
Future Work Investigate the usage of the most recent security/routing
techniques and algorithms in VANETs suitable for DTMon
Adapt DTMon and the same framework toward mobile nodes (e.g., cell phones) TOs are service providers (or TMCs) and … Vehicles are smart-phones (and with installed DTMon apps) Apps are updated with most recent defined virtual strips for the region
Extend our implementation of VANET simulation modules for urban areas (e.g., intersections) Add the ability to read in and use detailed maps instead of a single
straight highway Investigate the use of dynamically-defined virtual strips and TOs in
DTMon to evaluate the performance of our proposed framework in urban area
This work was supported in part by the National Science Foundation under grants CNS-0721586 and CNS-0709058.
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Publications Hadi Arbabi and Michele C. Weigle, "Monitoring Free-Flow Traffic using
Vehicular Networks," In Proceedings of the IEEE Intelligent Vehicular Communications System Workshop (IVCS). Las Vegas, NV, January 2011.
Hadi Arbabi and Michele C. Weigle, “Using DTMon to Monitor Transient Flow Traffic”, In Proceedings of the IEEE Vehicular Networking Conference (VNC). Jersey City, NJ, December 2010.
Hadi Arbabi and Michele C. Weigle, “Highway Mobility and Vehicular Ad-Hoc Networks in ns-3,” In Proceedings of the Winter Simulation Conference. Baltimore, MD, December 2010.
Hadi Arbabi and Michele C. Weigle, "Using Vehicular Networks to Collect Common Traffic Data," In Proceedings of the ACM International Workshop on Vehicular Internetworking (VANET). Beijing, September 2009.
Hadi Arbabi, "Channel Management in Heterogeneous Cellular Networks", Master's Thesis, June 2007.
Hadi Arbabi, "PCI Interface to Control Parallel Stepper Motors Simultaneously: Design, Implementation, Driver, and GUI", Bachelor's Thesis and Technical Report, June 2001.