学术报告第201210期

题目: Modelling and performance evaluation of the IEEE 802.11 DCF for  real-time control

报告人：田玉楚 教授   澳大利亚昆士兰科技大学

时间：2012年9月9日下午16:00

地点：南一楼 521 会议室

摘要:
Popular wireless networks, such as IEEE  802.11/15/16, are not designed for real-time applications. Thus, supporting  real-time quality of service (QoS) in wireless real-time control is challenging.  We adopt the widely used IEEE 802.11, with the focus on its distributed  coordination function (DCF), for soft-real-time control systems. The concept of  the critical real-time traffic condition is introduced to characterize the  marginal satisfaction of real-time requirements. Then, mathematical models are  developed to describe the dynamics of DCF based real-time control networks with  periodic traffic, a unique feature of control systems. Performance indices such  as throughput and packet delay are evaluated using the developed models,  particularly under the critical real-time traffic condition. Finally, the  proposed modelling is applied to traffic rate control for cross-layer networked  control system design.

个人简介:
Professor Yu-Chu  Tian is a computer scientist and an expert in networks and systems. He is an  Australia Research Council recognised expert of international standing. He is a  professor of computer science and the Head of Discipline of Computer Networks  and Communications at Queensland University of Technology. Prof Tian received  the PhD degree in industrial automation from Zhejiang University in 1993, and the PhD degree in Computer and  Software Engineering from the University of Sydney in 2009. In 1987, he joined the  Naval Academy of Engineering as a Lecturer in Systems Engineering. From 1994 to  1998, he was with Zhejiang University as an Associate Professor. From  1996 to 1998, he was also with Hong Kong University of Science and Technology as  a Research Associate. In 1998, he joined Curtin University of Technology as a  Research Fellow. He was elected as one of the first four Western Australia  Strategic Research Fellows in 2000. Since 2002, he has been with Queensland  University of Technology, Brisbane, Australia , initially as a Lecturer,  later as a Senior Lecturer and Associate Professor, and currently as an  Professor and HoD. As a visiting professor, he was with the Department of  Computer Science, the University of  Maryland at College Park, USA , in 2007. He has published over  140 refereed papers, and the h-index of his publications has reached 19. His  current research interests include complex systems, systems engineering,  real-time computing, embedded systems, computer networks, wireless  communications, and control theory and engineering. He is the author and  co-author of more than 139 refereed journal and conference papers and the holder  of a patent. He is an Associate Editor for Information Sciences (Elsevier) and  Asia-Pacific Journal of Chemical Engineering  (Wiley).