Information of COE Seminar

We would like to inform you about COE-SEMINAR as follows.

DATE :	July 26, 2005 15:00-17:30
PLACE :	IS Collaboration room 7 (IS III-5)
SPEAKER :	Dr. Fengyuan Ren "Time synchronization in wireless sensor network" Dr. Xuehai PENG "Hierarchical Mobile IPv6 and Dynamic Hierarchy"
SPEECH :	English
Reference :	Research Center for Trustworthy e-Society (E-mail:miyuki-s)

ABSTRACT
Dr. Fengyuan Ren
Time synchronization is a supporting technology for many applications in wireless sensor networks (WSN). In this talk, we will explain why time synchronization is necessary, and why the traditional time synchronization approaches, such as NTP and GPS are not used in WSN. The technical challenges will be analyzed. The model of computer clock and the basic time synchronization mechanism will be introduced. The existed typical schemes and algorithm will be reviewed and summarized. Finally, our work will be presented.
Slide (PDF file)

Dr. Xuehai PENG
Internet was extended continually in its scale and application since last century 60's. It has become the largest man-made information system nowadays, but with some challenges. IPv6 was proposed to be important content of Next Generation Internet, with mobility as its feature. Mobile IPv6 was designed to enable an IPv6 terminal to continue communications seamlessly while changing its access to network. Since decreasing communication and management cost is a key issue of the research of the Internet mobility management, Hierarchical Mobile IPv6 was proposed in result. In this lecture, an overview of IPv6 and mobile IPv6 is given firstly. Performance of HMIPv6 is analyzed later. Aiming at more diversiform mobile terminals and application, a dynamic hierarchy approach, named AMMS by us, is also introduced. As an important content of our project, Trusted Computed and Trustworthy Networks, further thinking about trustworthy mobile networks is made
Slide (PDF file)

CAREER SUMMARY
Fengyuan Ren, received a B.A and M.Sc. degrees in automatic control from Northwestern Ploytechnical university in 1993 and 1996 respectively. He obtained Ph.D degree in Computer Science. During 2000~2001 he worked at electronic engineering department of Tsinghua University as a post doctor. Now, he is an associate professor at computer science department of Tsinghua university. His main research interests are Congestion and Flow Control in Computer Networks,Robust Control Theroy,and wireless sensor network etc.
Xuehai PENG received the B.S. in communication engineering and the Ph.D. in communication and information system from Beijing JiaoTong University in 1997 and 2004 respectively. Currently he is a postdoctor of the Department of Computer Science and Technology, Tsinghua University. His main research interests include network routing and switch, trustworthy networks, and mobile wireless Internet.