Thursday, December 12, 2013

Is There a Case for Mobile Phone Content Pre-staging

Presenter: Alessandro Finamore
Authors: Alessandro Finamore (Politecnico di Torino), Marco Mellia (Politecnico di Torino), Zafar Gilani (Universitat Politecnica de Catalunya), Kostantina Papagiannaki (Telefonica Research), Yan Grunenberger (Telefonica Research), Vijay Erramilli (Telefonica Research)

The authors propose a novel technique to implement content pre-staging (caching) in mobile network, specifically by pushing content on the user devices.
A new component is introduced: the content bundler. It is installed at the ISP side and it  classifies the traffic and identifies the most popular items to bundle the set of content that  will be pushed  to the mobile terminals.
They study a 1-day trace (HTTP log) of a big metropolitan city to evaluate the performance of the scheme. It turns out that popularity is a good trigger for  pre-staging.
Different strategies are proposed to bundle content. Among them, the popularity based one is the most practical, achieving 7% of saving in terms of volume of data transferred and tangible benefits for users too.

Q: It seams a macro network optimization, is this targeted for big events?
A: Yes, but not only. Imagining a big event I may say that if we push the bundler at the BST level we may achieve suboptimal performance

Q: It seams that  you determine the bundle on a 24h basis, what about doing it hour by hours?
A: This is exactly what we have done.