Zhe LI

Projets de recherche

I am currently included by project VIPEER (VIdeo Traffic Engineering in an Intra-Domain Context using), a collaborative project funded by the French "Agence Nationale de la Recherche". It started in January 2010, and shall last 3 years.

The main objective of the present project is to provide methods allowing a network operator to have explicit control on traffic flows related to video distribution. VIPEER builds upon the collaboration between a traditional CDN and a peer-assisted CDN or "distributed CDN" (dCDN), i.e. an overlay controlled by the network operator using P2P paradigms. The peers in the dCDN may be network elements such as network nodes or boxes located at customers' premises. In the latter case, the box is actually split between a private part which is directly under the customer's control and a "public" part that is managed within the distributed overlay, by the network operator.

My main task is to design the technical elements of the video delivery system.  The major components include a CDN, a “dCDN” (a set of set-top-boxes), and the clients. The main contributions of this task include: maintaining a state-of-the-art bibliography on a flourishing scientific and applicative topic, the design of algorithms for allocating content to edge servers, either CDN or dCDN, the design of algorithms for delivering the data to the clients, and the development of several tools, both theoretical and applicative, allowing a comprehensive analysis of the proposed algorithms.

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