A simulation framework for traffic information dissemination in ubiquitous vehicular ad hoc networks

The ongoing efforts to apply advanced technologies to help solve transportation problems advanced the growing trend of integrating mobile wireless communications into transportation systems. In particular, vehicular ad hoc networks (VANETs) allow vehicles to constitute a decentralized traffic information system on roadways and to share their own information. This research focused on the development of an integrated transportation and communication simulation framework to build a more realistic environment with which to study VANETs, as compared to previous studies. This research implemented a VANET-based information model into an integrated transportation and communication simulation framework in which these independent simulation tools were tightly coupled and finely synchronized. A traffic information system as a VANET application was built and demonstrated based on the simulation framework developed in this research. In this system, vehicles record their own travel time data, s…

Author: Kim, Hyoungsoo

Source: University of Maryland

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Chapter 1: Introduction
1.1 Background
1.2 Research objectives
1.3 Dissertation organization
Chapter 2: Related Work
2.1 Ad hoc networks
2.1.1 The ALOHA network
2.1.2 CSMA/CD, IEEE 802.3, and the Ethernet
2.1.3 CSMA/CA, IEEE 802.11, and Wi-Fi
2.1.4 Bluetooth (IEEE 802.15.1)
2.2 Vehicular ad hoc networks
2.2.2 Traffic Safety
2.2.3 Traffic Information Dissemination
2.2.4 Vehicle-Infrastructure Integration
2.3 Traffic information imputation
2.4 Discussion
Chapter 3: Traffic Information Characteristics
3.1 Individual travel time characteristics
3.1.1 Experiment for individual travel time
3.1.2 Reliability of individual travel time information
3.1.3 Acceptance probability
3.2 Travel time information relevance
3.2.1 Experiment for spatial and temporal relevance
3.2.2 Spatial and temporal relevance
3.2.3 Linear model
3.3 Discussion
Chapter 4: Simulation Framework
4.1 Simulation design
4.1.1 Information model
4.1.2 Simulation framework desig
4.2 Implementation
4.2.1 Simulation tools
4.2.2 Mobility management
4.2.3 Time management
4.2.4 Intervehicle communication
4.3 Discussion
Chapter 5: Traffic Information System Application
5.1 Traffic information system configuration
5.2 Simulation model architecture
5.2.1 Vehicle release and travel time generation
5.2.2 Data dissemination
5.2.3 Data interpretation
5.2.4 Dynamic routing
Chapter 6: Case Study
6.1 Simulation environment
6.2 Framework performance
6.3 Traffic information speed
6.4 Dynamic routing performance
6.5 Discussion
Chapter 7: Conclusion
7.1 Summary of Findings
7.2 Contribution
Appendix A Paramics API code
Appendix B QualNet code

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