Eiji Oki, Associate Professor, University of Electro-Communications, Tokyo, Japan

Date: April 2, 2009 (Thursday)
Time: 11:30am
Place: 202 ECEC, NJIT 

About the Presenter: 

Eiji Oki is an Associate Professor of The University of Electro-Communications, Tokyo Japan. He received B.E. and M.E. degrees in Instrumentation Engineering and a Ph.D. degree in Electrical Engineering from Keio University, Yokohama, Japan, in 1991, 1993, and 1999, respectively. In 1993, he joined NTT Laboratories, Tokyo Japan. He has been researching IP and optical network architectures, traffic-control methods, high-speed switching systems, and communications protocols. From 2000 to 2001, he was a Visiting Scholar at Polytechnic University, Brooklyn, New York, where he was involved in designing tera-bit switch/router systems. He joined The University of Electro-Communications, Tokyo Japan, in July 2008. He has published more than one hundred peer-reviewed journal, transaction articles, and international conference papers. He is active in standardization of Path Computation Element (PCE) and GMPLS in the IETF. He wrote more than ten IETF RFCs and drafts. He is also active in organizing international journals and conferences. He served as a Co-Chair of Technical Program Committee for 2006 Workshop on High-Performance Switching and Routing (HPSR 2006), Guest Co-Editor of Journal of Communications and Networks in 2007, Guest Co-Editor of IEEE Communications Magazine in 2008, Vice-Chair of Technical Program Committee for iPOP 2009, and Track Co-Chair on Optical Networking, ICCCN 2009. Dr. Oki was the recipient of the 1998 Switching System Research Award and the 1999 Excellent Paper Award presented by IEICE, and the 2001 Asia-Pacific Outstanding Young Researcher Award presented by IEEE Communications Society for his contribution to broadband network, ATM, and optical IP technologies. He co-authored two books, ``Broadband Packet Switching Technologies,'' published by John Wiley, New York, in 2001 and ``GMPLS Technologies,'' published by RC Press, Boca Raton, in 2005. He is an IEEE Senior Member.

About the Talk: 

Adopting an appropriate routing scheme can increase the network resource utilization rate and network throughput of Internet Protocol (IP) networks. Since it optimizes the assignment of traffic resources, additional traffic can be supported. It also suppresses network congestion and increases robustness in that the face of traffic demand fluctuations, most which are difficult to predict. One useful approach to enhancing routing performance is to minimize the maximum link utilization rate, also called the network congestion ratio, of all network links. I will talk about load-balanced optimal routing by the pipe, hose, and intermediate models. The pipe model, which is specified by the exact traffic matrix, provides the best routing performance, while the traffic matrix is difficult to measure and predict accurately. On the other hand, the hose model is specified by the traffic as just the total outgoing/incoming traffic from/to each node, but it has a problem that its routing performance is degraded compared to the pipe model, due to insufficient traffic information. The intermediate model, where the upper and lower bounds of traffic demands for source-destination pairs are added as constraints, is a construction that lies between the pipe and hose models. The intermediate model, which lightens the difficulty of the pipe model, but narrows the range of traffic conditions, specified by the hose model, enhances the routing performance compared to the hose model. 

For more information contact Roberto Rojas-Cessa (973)-596-3508 or e-mail: rojas@njit.edu. Directions to NJIT can be found at http://www.njit.edu/about/visit/gettingtonjit.php.

Click here for seminar archives

Note: All ECE MS thesis defense and PhD dissertation (proposal) defense are counted towards ECE791.