Fast Rerouting for IP Multicast Traffic in Managed IPTV Networks

Tuesday, November 17, 2009 - 11:45am


3:30 – 4:30
Computer Science Conference Room, Harold Frank Hall Rm. 1132

HOST: Ben Zhao

Computer Networks Group
University of Goettingen
Goettingen, Germany

Title: Fast Rerouting for IP Multicast Traffic in Managed IPTV Networks


Recent deployments of IP based multimedia distribution, especially
broadcast TV distribution has increased the importance of simple and
fast restoration during IP network failures for service providers. The
restoration mechanisms currently adopted in IP networks use either IGP
re-convergence (which could be too slow for multimedia apps) or some
form of fast reroute (which does not support IP multicast). Both would
increase router configuration and network operation complexity as well
as human-errors. In this talk, we present and evaluate a simple but
efficient restoration method that relies on unicast IP encapsulation for
undelivered multicast packets during failures. We tune IP link weights
such that the multicast routing path and unicast routing path between
any two routers are failure disjoint. We demonstrate that, our method
can be realized with minor modification to the current multicast routing
protocol (PIM-SM), while yielding to good performance in the Emulab
testbed. This is joint work with my student at Goettingen and
collaborators at AT&T lab.


Xiaoming Fu received his PhD in Computer Science from Tsinghua
University, Beijing, China in 2000. After that he moved to Germany,
firstly as a research fellow (2000-2002) at Technical University Berlin,
then as assistant professor (2002-2007) at the University of Goettingen.
Since April 2007 he is a professor and head of the Computer Networks
Group at the University of Goettingen.

He has also held visiting positions at ETSI, University of Cambridge and
Columbia University, and is currently a Fulbright Visiting Professor at
UCLA Computer Science Department. He has been a PI and steering
committee member of EU-sponsored research projects VIDIOS, ENABLE and
MING-T. He has served as a guest editor of the IEEE Network Special
Issue on Implications and Control of Middleboxes in the Internet, and an
area editor of the Computer Communications Journal (Elsevier), as well
as on the program or organization committees of several conferences such
as MobiCom/MobiHoc, MobiArch, INFOCOM, ICNP, ICDCS, CCW and ICCCN.
Currently he is secretary of the IEEE Communications Society’s Technical
Committee of Computer Communications (TCCC).