Planning sujet à modifications :
Mercredi 13 octobre 2010 à 14h00 Salle DIR 306, Bu-Sung LEE, Francis (NTU Singapore), Wireless networking using Multiple channel multiple interface
Wireless ad hoc network consists of self-organising nodes which relay packets for each other. Research in ad hoc networks has focused on single channel and single interface networks, which has a major problem of significant bandwidth capacity reduction due to channel interference among nodes.
One approach to address the bandwidth reduction problem is to use multiple channel multiple interface, where each node have a choice of the out-going channel for each packet/flow.
This talk will focus on the use of multiple channel multiple interface (MCMI) with efficient channel assignment algorithms. It was found that simple static distributed assignment of channel, eg.
Round-robin, can drastically reduced contention, improving the throughput and packet delay performance of the network. Using a slightly more complex algorithm we are able to minimize both the intra-flow and inter-flow interference.
Further improvement were gain using dynamic distributed channel assignment and routing protocol that can take advantage of the multiple channels available using two interfaces by dynamically switching the channels for forwarding packets based on data traffic.
We extended the AODV protocol, called AODV-M using an additional routing metric.
A/Prof. Bu-Sung LEE, Francis joined NTU in 1987 and is currently an Associate Professor with the School of Computer Engineering, Nanyang Technological University.
In July 2010, he holds a joint appointment in industry as Director, Service Platform Lab, HP Labs Singapore to direct the research towards "Everything as a service".
He has been actively involved in Regional Network since 1998 through active participation in Internet2 and Asia Pacific Advance Network Consortium (APAN).
He was the Director of Network Technology of APAN from 2000-2003. In Nov. 2003 he was elected the first president of the Singapore Research & Education Networks (SingAREN) society. SingAREN is a partner of the TEIN-2 project which connects European countries directly to ASEM member countries.
He is a member of the technical management committee of TEIN-2 and contributed to the successful realisation of the network.
He has served as committee member in various conferences, eg. Program Chair in ccGrid 2006,
Program Chair in International Conference on Network 2004, IFIP Networking 2008 General Chair. He was the invited KEYNOTE speaker at GridNets 2008.
He is the co-author of the paper entitled , "Impact of Parallel Download on Job Scheduling in Data Grid Environment", which won the BEST paper award at the 7th International Conference on Grid and Cooperative Computing (GCC 2008).
In addition, he also co-authored the paper, "Seamless Handoff in Heterogeneous Network for VOIP Applications", which won the Best Paper award at the Second International Conference on Advances in Future Internet, July 2010.
His research interests are in network management, mobile and broadband networks, distributed networks, Network Qos, Grid computing. He has two patents and over 90 journal papers and 170 conference papers.