Capacity Sharing Workshop @ ACM CoNEXT 2012

December 10, 2012
Nice, France

ACM CoNEXT 2012WorkshopsCapacity SharingKeynotes

Keynote Abstracts and Short Bio’s of Keynote Speakers

Applying Abstraction for a More Efficient and Fair Network Usage

Speaker Dr Diego R. Lopez (Telefónica I+D)
Time: 9:15–10:15


Achieving a more fair and efficient usage of network infrastructures require a direct collaboration between the applications using the networks, and the networks themselves. Note here the intentional plural, since in most conceivable real cases, applications must rely on different networks, with different technologies and constraints and, what is of most importance, different administrative realms. This talk will introduce the need of applying abstraction mechanisms to make this collaboration possible, both at the northbound (application-to-network) and eastbound (network-realm-to-network-realm) interfaces. We will explore as well how recent proposals like the ALTO protocol, the new overlay and encapsulation methods, or the SDN paradigm can be applied to reach these objectives.


Dr. Diego R. Lopez is in charge of the Technology Exploration activities within the GCTO Unit of Telefónica I+D. After working for several years in the academic sector, as responsible for middleware infrastructures in RedIRIS (the Spanish NREN), he joined Telefónica I+D in 2011. Diego is currently focused on identifying and evaluating new opportunities in technologies applicable to network infrastructures, and the coordination of national and international collaboration activities. His current interests are related to network intelligence and virtualization, infrastructural services, and new network architectures. When not struggling with this stuff, Diego devotes his time to comics, cheeses and wines, long walks, and engaging into long discussions about whatever intricate issue he can find a suitable opponent.

Can Congestion-controlled Interactive Multimedia Traffic Co-exist with TCP?

Speaker: Dr Colin Perkins (University of Glasgow)
Time: 16:00–16:45


The WebRTC activity in the Internet Engineering Task Force (IETF) and World-Wide Web Consortium (W3C) is adding standards-based interactive multimedia conferencing features to web browsers. WebRTC systems are expected to see extremely wide deployment, starting in the next year. This deployment poses a challenge, since congestion control algorithms for interactive multimedia have not been standardized. The nature of interactive multimedia traffic complicates congestion control, and the interactions between WebRTC traffic, TCP flows, and the modern network worsen the problem. The region where congestion-controlled interactive multimedia traffic can feasibly co-exist with TCP is outlined, and areas where additional development seems necessary are highlighted.


Dr. Colin Perkins is a Senior Lecturer in the School of Computing Science at the University of Glasgow. His research interests are real-time networked multimedia, next-generation Internet routing, and the use of high-level languages for low-level network protocol implementations. He is heavily involved in standards development relating to the Real-time Transport Protocol (RTP) and other networked multimedia transport protocols in the IETF, where he was previously chair of the Audio/Video Transport working group. He received his BEng in Electronic Engineering in 1992, and his DPhil in 1996, both from the Department of Electronics at the University of York. He is a member of the IETF and the ACM, and a senior member of the IEEE.