Section: Contracts and Grants with Industry

Orange Labs CRE (2009-2010)

Participants : Yves Lechevallier, Florent Masseglia [resp.] , Brigitte Trousse.

Orange and Inria have signed a CRE (Contrat de Rercherche Externalisée), where the goals are:

• To transfer a technology from AxIS to Orange.

• To add a new step devoted to specific needs of Orange.

• To perform experiments on Orange Data.

The AxIS technology involved in this project is the SMDS [92] method proposed in the Ph.D thesis of Alice Marascu. SMDS is an algorithm intending to extract sequential patterns from data streams. The data stream is processed by batches that accumulate the data for the same time period. Afterwards, each batch is processed in order to i) obtain clusters of data and ii) extract approximate sequential patterns that will summarize the clusters. Each such sequential pattern will be considered as a center of the cluster and will evolve from one batch to another.

The new step added by request of Orange is a second clustering process, applied to the approximate sequential patterns. A demonstrator was developed and applied on 3 months data provided by Orange coming from the mobile portal usage. These log files contain the request of users on the portal, made from their mobile devices.

This project ended by July 2010, with the final deliverable containing the complete demonstrator [61] .