-----Original Message----- From: talks-bounces@lists.cs.princeton.edu [mailto:talks-bounces@lists.cs.princeton.edu] On Behalf Of Jennifer Rexford Sent: Tuesday, June 13, 2006 7:50 PM To: talks@lists.cs.princeton.edu Subject: [talks] Wed Jun 14 10:30am talk on overlay networks Reminder... TALK ANNOUNCEMENT Speaker: Professor John Chi-Shing Lui, Chinese University of Hong Kong Title: On the Interaction of Multiple Overlay Routing Date/time: 10:30am-11:30am on Wednesday June 14 Location: room 105 in the CS building (i.e., the small auditorium) Abstract: In the past few years, overlay networks have received much attention but there has been little study on the ``interaction'' of multiple, co-existing overlays on top of a physical network. In addition to previously introduced concept of overlay routing strategy such as the selfish routing, we introduce a new strategy called ``overlay optimal routing''. Under this routing policy, the overlay seeks to minimize its weighted average delay by splitting its traffic onto multiple paths. We establish that (i) the overlay optimal routing can achieve better delay compared to selfish routing, and (ii) there exists a Nash equilibrium when multiple overlays adopt this strategy. Although an equilibrium point exists for overlay optimal routing and possibly for selfish routing, we show that the interaction of multiple overlay routing may not be Pareto optimal and that some fairness anomalies of resource allocation may occur. This is worthy of attention since overlay may not know the existence of other overlays and they will continue to operate at this sub-optimal point. We explore two pricing schemes to resolve the above issues. We show that by incorporating a proper pricing scheme, the overlay routing game can be led to the desired equilibrium and avoid the problems mentioned above. Extensive fluid-based simulations are performed to support the theoretical claims. The collaborators of this work include Joe W.J. Jiang and Dah-Ming Chiu. Bio: John Chi-Shing Lui was born in Hong Kong. He received his Ph.d. in Computer Science from UCLA. After his graduation, he joined the IBM Almaden Research Laboratory/San Jose Laboratory and participated in various R&D projects on file systems and parallel I/O architectures. He later joined the Department of Computer Science and Engineering at the Chinese University of Hong Kong. His research interests span both in system and in theory/mathematics, with current research interests in theoretic/applied topics in data networks, distributed multimedia systems, network security, OS design issues and mathematical optimization and performance evaluation theory. John's personal interests include films and general reading. _______________________________________________ talks mailing list talks@lists.cs.princeton.edu https://lists.cs.princeton.edu/mailman/listinfo/talks