Toronto Networking Seminar

Organized by Department of Computer Science and Department of Electrical and Computer Engineering, University of Toronto

Can IP Routing Effectively use Optical Bypass?

Admela Jukan
TU Braunschweig, Germany

Friday, March 12, 2pm
Location: BAB024 (Bahen Centre Basement) 


Despite the steady and significant increase in traffic, todays Internet topologies are stable, reliable, and underutilized. This is mainly due to the proven ISP practice called headroom, where the static IP links are significantly over-provisioned, often up to 70 percent. While the practice of large headroom allows for accommodation of unpredictable flows, and also keeps the network stable and resilient against attacks and failures, it leads to high capital and operational expenses of high-speed IP interfaces, as well as higher energy consumption. At first glance, optical circuits can address all these problems, as they can be dynamically deployed to bypass any congested or faulty IP links and are the "greenest" of all networks; however, the price to pay is stability of IP routing and network management, which is in fact the main reason why ISPs continue to deploy the headroom practice. In this talk, I will discuss why past approaches to deploy dynamic optical circuits have not been widely adopted for IP routing, and present an idea wherein IP optical bypass links between a pair of routers are established, while keeping the IP routing stable. I will discuss an optimization-based approach to compute the optimal set of optical circuits used to bypass large IP flows. But, can this be done without the knowledge of the traffic matrix?


Admela Jukan is W3 Professor of Electrical and Computer Engineering at the Technical University Carolo-Wilhelmina of Brunswick (Braunschweig) in Germany. Prior to coming to Brunswick, she was research faculty at the Institut National de la Recherche Scientifique (INRS), University of Illinois at Urbana Champaign (UIUC) and Georgia Tech (GaTech). From 2002-2004, she served as Program Director in Computer and Networks System Research at the National Science Foundation (NSF) in Arlington, VA. She received the M.Sc. degree in Information Technologies and Computer Science from the Polytechnic of Milan, Italy, and the Ph.D. degree (cum laude) in Electrical and Computer Engineering from the Vienna University of Technology (TU Wien) in Austria. Dr. Jukan has chaired and co-chaired several international conferences, including IFIP ONDM, IEEE ICC and IEEE GLOBECOM. She serves as Associate Technical Editor for IEEE Communications Surveys, IEEE Communications Magazine and IEEE Network. She is a Senior Member of the IEEE. Her research interests include optical networks, network control and management and performance evaluation.

Host of Talk:

Jörg Liebeherr (