I am an seasoned R&D professional, with over 15 years experience. I have participated in and led a large number of large-scale R&D projects, both commercial and academic, at the national and European levels. My main field of expertise is Quality of Experience (QoE), and I am conversant on a number of other topics, such as Network Function Virtualization (NFV), Software-defined Networks (SDN), QoS, Network Management, Data Analysis, and Predictive Models.
In the first half of 2017, I was a Senior Systems Engineer at EXFO, in the NFV team. My work revolved around the virtualization of network probes and their associated support infrastructure, and their integration into NFV architectures, notably ETSI NFV MANO. There were also performance issues to be addressed, due to moving the probes from specialized hardware to a COTS-based cloud context.
Until early 2017, I was a Principal Scientist at VTT Technical Research Centre of Finland, working in the Network Performance team, within the Communication Systems expert area.
At VTT, I was the lead for research in the QoE domain. Besides the traditional work on quality assessment for media services, I have also worked on other aspects of QoE, most notably QoE management, and the business and economic aspects of QoE.
I also worked on ways to define, understand and improve QoE for non-media services, in particular for Web-based services (WebQoE). This is particularly interesting for Cloud services, and work on this subject was spear-headed within the TIVIT Cloud Software Program. There are many possible applications for QoE estimators for generic services, ranging from SLA definition and enforcement, Operating Support Systems, datacenter management, and of course QoE optimization for the different services.
My research interests are centered around Quality of Experience (mainly for networked multimedia and other applications), and its applications to network control and optimization, pricing, and Service Level Agreements definition. I work on reference-free, parametric models for real-time QoE estimation, since those usually are the most suitable for control applications.
One of the subjects that I am currently interested in is the development QoE-aware control mechanisms that can improve the quality perceived by the user by acting both at the application and network levels. Suitable parametric models for quality allow to assess the impact of different network impairments and application configuration parameters on the QoE, and this knowledge can be in turn used to take corrective actions when needed. For example, vertical handovers can be triggered in multi-access devices, or application-level configurations can be changed to better suit the current network conditions (e.g. increase redundancy if packet losses are high, or choose a different video representation).
PhD in Computer Science, 2005
Université Rennes 1, France
MSc in Computer Science, 2002
Université Rennes 1, France
Computing Engineering, 2001
Universidad de la República, Uruguay