[Nets-seminars] UCL EE Talk Friday 28th February 16:00 -- Barlow Room 807 Roberts

[Richard G. Clegg]

Next Friday's talk (28th February) will be in the Barlow Room in the 
Robert's building, room 807.  It is at 16:00.  If you are visiting from 
outside UCL and need access to the building then please email Ioannis 
Psaras <i.psaras at ucl.ac.uk> as I will not be in UCL that day.

The speaker is George Xylomenos from Athens University of Economics and 
Business.

Title: Reducing Forwarding State in Content-Centric Networks with 
Semi-Stateless Forwarding (to appear at IEEE INFOCOM 2014, joint work 
with Christos Tsilopoulos and Yannis Thomas)

Abstract: Routers in the Content-Centric Networking (CCN) architecture 
maintain state for all pending content requests, so as to be able to 
later return the corresponding content. By employing stateful 
forwarding, CCN supports native multicast, enhances security and enables 
adaptive forwarding, at the cost of excessive forwarding state that 
raises scalability concerns. We propose a semi-stateless forwarding 
scheme in which, instead of tracking each request at every on-path 
router, requests are tracked at every d hops. At intermediate hops, 
requests gather reverse path information, which is later used to deliver 
responses between routers using Bloom filter-based stateless forwarding. 
Our approach effectively reduces forwarding state, while preserving the 
advantages of CCN forwarding. Evaluation results over realistic ISP 
topologies show that our approach reduces forwarding state by 54%-70% in 
unicast delivery, without any bandwidth penalties, while in multicast 
delivery it reduces forwarding state by 34%-55% at the expense of 6%-13% 
in bandwidth overhead.

Bio:George Xylomenos is an Assistant Professor of Computer Science at 
the Athens University of Economics and Business (AUEB) and a member of 
the Mobile Multimedia Laboratory. He received his B.Sc. in Informatics 
(1993) from AUEB, and M.S. (1996) and Ph.D. (1999) degrees in Computer 
Science from the University of California, San Diego (UCSD). His current 
research interests include information-centric network architectures and 
protocols, multicast-based and peer-to-peer content distribution, the 
provision of Quality of Service over wireless and mobile networks and 
real-time transport protocols for multimedia. In the past he has worked 
in link layer protocols for wireless hosts and multicast support for 
mobile hosts. He has participated in many EU funded FP6 and FP7 
projects, including the pioneering PSIRP and PURSUIT projects which 
developed a clean-slate Future Internet architecture based on pub/sub.

-- 
Richard G. Clegg,
Dept of Elec. Eng.,
University College London
http://www.richardclegg.org/