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Abstract:
Transportation systems are designed to transport people from one place to another as safely and efficiently as possible. Unfortunately, many accidents and fatalities occur on the road every day. Recently, the development of the Intelligent Transportation System (ITS) has been advancing towards safe and smooth driving without delay. Wireless communication systems are expected to play a pivotal role in the ITS safety-related applications. Dedicated Short Range Communication (DSRC) radio technology is projected to support low-latency wireless data communications among vehicles and from vehicles to roadside units. Vehicle safety-related communication services, which require reliable and fast message delivery, usually demand broadcast communications in vehicular ad hoc networks (VANETs). The major obstacle that hinders the successful deployment of the DSRC systems is the lack of reliable and scalable communication protocols for safety-related services.
In this presentation, an effective scheme for the design of the control channel in DSRC to provide safety-related broadcast services is reported. The core strategies of the new scheme to enhance broadcast reliability include cross-layer priority set, dynamic receiver-oriented packet repetitions for one-hop broadcast, and farthest relay counter-based multi-hop broadcast. Comparing with other schemes for DSRC based safety-related services, the proposed scheme is more robust and efficient. Moreover, the proposed scheme is compatible with the IEEE 802.11p standard, and easy to implement. Additionally, the reliability and performance of the proposed broadcast scheme for DSRC VANET safety-related services on highway are investigated analytically and by simulations. The analytic model accounts for the impact of the hidden terminal problem, message arrival intervals, and the backoff counter process on the reliability and performance. Consequently, observations and discussions from numerical results are demonstrated
Biographical Sketch
Xiaomin Ma received B.E. and M.E. degrees in Electrical Engineering in 1984 and 1989, respectively, and his Ph.D. degree in Signal and Information Processing at the Beijing University of Posts & Telecommunications, China, in 1999. From 2000 to 2002, he was a post-doctoral fellow in the Department of Electrical and Computer Engineering, Duke University.
He had been teaching in the field of Electrical and Computer Engineering as an assistant professor and associate professor at Petroleum University of China for about eight years. Then, he worked in a telecommunication company for a short time. Currently, he is an associate professor in Electrical and Computer Engineering at Oral Roberts University.
His research interests include physical layer and MAC layer of mobile ad hoc wireless networks, Quality of service (QoS) and call admission control protocols in wireless networks, stochastic modeling and analysis of communication systems, and computational intelligence and its applications to communication coding, signal processing, and control systems. He was PI, Co-PI or project leader in several research projects supported by Chinese National Science Foundation (NSF), Oklahoma NSF EPSCoR, Motorola, AFOSR, ARO etc. He has co-authored one book, and published more than 70 papers in peer-reviewed journals and conferences. He also holds a US patent. He has been serving in program committees of several major international conferences.
Dr. Ma has received numerous awards and honors for his work in teaching and research. He currently is a senior member of the IEEE. |
