[NRG] Practice talk on Tuesday 11/23

Michel Machado michel at digirati.com.br
Sat Nov 20 14:56:44 EST 2010

Sorry, Gonca. I won't be able to make it. I'm traveling this
Thanksgiving. Good luck with your talk at CoNext!

[ ]'s
Michel Machado

On Fri, 2010-11-19 at 15:33 -0500, Gonca Gürsun wrote:
> Hi all,
> I would like to give a practice talk on next Tuesday at 4pm for our
> paper I will be presenting in CoNext soon. Your feedback and comments
> will be very much appreciated. I am posting the abstract below.
> Thanks,
> --gonca
> Inferring Invisible Traffic
> A traffic matrix encompassing the entire Internet would be very
> valuable. Unfortunately, from any given vantage point in the network,
> most traffic is invisible. In this paper we describe results that hold
> some promise for this problem. First, we show a new characterization
> result: traffic matrices (TMs) typically show very low effective rank.
> This result refers to TMs that are purely spatial (have no temporal
> component), over a wide range of spatial granularities. Next, we
> define an inference problem whose solution allows one to infer
> invisible TM elements. This problem relies crucially on an atomicity
> property we define. Finally, we show example solutions of this
> inference problem via two different methods: regularized regression
> and matrix completion. The example consists of an AS inferring the
> amount of invisible traffic passing between other pairs of ASes. Using
> this example we illustrate the accuracy of the methods as a function
> of spatial granularity.
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