Research projects

We study residential-access Quality of Service, Internet tomography, and routing protocols — all aimed at understanding Internet itself. QoS techniques are also applied to Internet tomography to obtain richer information than just topology, and to derive better models on which to test the proposed routing protocols. We propose a new methodology to measure residential-access QoS via continuous, very-low-load probes; we build a new map annotated with QoS and MPLS tunnels; and we propose a new EGP routing protocol based on topological considerations, with sub-linear complexity in routing-table size.

Finding new ways to manage growing data usage and to improve the level of service required by new smartphone applications is an essential issue. Understanding user mobility (the context they experience) and the content they demand is fundamental when looking for solutions in the modern communication landscape. UCOOL derives appropriate models for the correlation between user interests and their mobility, and develops efficient prediction algorithms for both. The partners — France, Brazil, Chile, Argentina — bring complementary background to address context-content correlation and prediction in mobile wireless networks.

Goals: measurement, modelling, and proposal of new routing algorithms for the Internet. Algorithms that find routes dynamically must be verified on artificial networks with the same characteristics as real ones — which requires a good model of real networks. Probes also capture traffic and QoS data; we propose routing protocols whose tables grow sub-linearly with network size. Collaboration with UBA, ENS Lyon (France), and LNCC (Brazil).

We study Internet structure via network tomography (topology + traffic), propose routing protocols that scale with continuous growth, and analyse it as a complex system, primarily focused on community detection.

Internet analysis (topology and traffic) and application-routing from three angles: tomography (topology + utilisation exploration), traffic measurement (per application, link, or destination), and P2P routing.

Study of computer networks and data routing in selected areas to improve existing technologies: Internet topology and its properties, ad-hoc networks, and data traffic from the applications’ viewpoint. We continue topological analysis through k-cores (LaNet-vi), develop the ANTop ad-hoc protocol (simulated in QUENAS), and model traffic per application linking it to QoS.