Research area: Networks

The research area focuses on technology, mechanisms and architectures for cost efficient provision of services with differentiated quality of service (QoS) requirements over heterogeneous, partly autonomic and dynamic communication networks. An important foundation for the research is the modeling and quantitative evaluation of such networks. The QoS aspects considered are related to traffic handling and dependability. There are strong collaborations with the Information security research area at ITEM to ensure that the security aspects of QoS are covered, and with the Networked systems research area to link network-layer QoS to end user quality of experience (QoE).


The research area has the current staff:

Research activites

The main research activities at the research area include:

  • Wireless Networking (Andresen, Heegaard, Jiang, Kure) [+]

    Wireless Networking (Andresen, Heegaard, Jiang, Kure) [–]

    Focuses on ad hoc networking, targeting QoS for multicast in ad hoc networks. The research has been extended towards wireless sensor networks where the initial focus has been on whether game theory is a suitable tool for defining routing protocols. Another focus is on mobile networks, with special interest in handover issues and techno-economical optimisation of ITS infrastructure. Part of the work has been conducted at Q2S and benefits from the European networks of excellence: Euro-NGI (2003-2006), Euro-FGI (2006-2008) and Euro-NF (2008-2011). The research on mobile networks has close collaboration with the Network Laboratory (NetLab) and SIG-Wireless.
  • Optical Networking (Stol, Øverby) [+]

    Optical Networking (Stol, Øverby) [–]

    The focus is on architectures and QoS aspects of optical networks, with special attention to hybrid optical networks. Projects include the Optical packet-switched migration-capable networks with service guarantees (OpMiGua) project, co-funded by the Research Council of Norway, Telenor and NTNU, 2004-2007. Currently, two PhD students and one Post.Doc (Savi) are involved in this activity.
  • Internet Traffic Theory (Jiang) [+]

    Internet Traffic Theory (Jiang) [–]

    The focus is on stochastic network calculus, which is a theory crucial for QoS analysis of networks where applications can tolerate some amount of loss or excess delay and / or the provided services are stochastic in nature. Other projects include “NetControl: Probabilistic Network Calculus Models for Feedback Control”, co-funded by the Research Council of Norway and DAAD, Germany (2008-2009), and the European networks of excellence: Euro-NGI (2003-2006), Euro-FGI (2006-2008) and Euro-NF (2008-2011).
  • QoS Management (Heegaard, Helvik) [+]

    QoS Management (Heegaard, Helvik) [–]

    Focuses on techniques for optimizing the quality of delivered service and resource utilization. A novel idea is to use simple mobile agents (ants) swarming in the network to manage resources. This swarm-based technique yields an inherently robust, distributed and autonomous path management. It has also been applied to on-line and efficient deployment of service components, in cooperation with the Networked systems research area. Another focus is on quantifiable dependability and survivability. The considered scenarios include core networks and multi-operator multi-technology wireless environment. Work on survivability is carried out in cooperation with Duke University, USA and within the IST-BISON project (Telenor partner). The work conducted at Q2S benefits from the cooperation within the European networks of excellence: Euro-NGI (2003-2006), Euro-FGI (2006-2008) and Euro-NF (2008-2011), and has on dependability issues in tight cooperation with AGH, VTT and University of Rome II.
  • Security Assessment (Helvik) [+]

    Security Assessment (Helvik) [–]

    The objective is to quantifiably model security services and obtain probabilistic measures for security services in dynamic environments with non-trusted parties. The work is carried out in co-operation the Information security research area. The work within the area has been conducted at Q2S and benefitted from cooperation within the European networks of excellence: Euro-NGI (2003-2006), Euro-FGI (2006-2008) and Euro-NF (2008-2011).
  • Network Measurements (Jiang, Helvik, Heegaard) [+]

    Network Measurements (Jiang, Helvik, Heegaard) [–]

    The focus is on assessing QoS related performance through traffic measurement. Topics of special attention include monitoring and controlling Quality of Experience, robust on-line measurement, traffic and service characterization, compound network failure and restoration processes, and network diagnosis and anomaly detection. This area has collaboration with the Information security research area on anomaly detection. National and international projects include the Celtic/NFR R2D2 project, NetControl, and the European networks of excellence: Euro-NGI (2003-2006), Euro-FGI (2006-2008) and Euro-NF (2008-2011).
  • Cloud Computing (Jiang) [+]

    Cloud Computing (Jiang) [–]

    This area focuses on resource allocation and optimization in cloud systems. See the CleanSky project.
  • Tele-economics (Øverby) [+]

    Tele-economics (Øverby) [–]

    This area focuses on cost analysis, business modelling, and modelling of telecommunication markets. This is a recent focus activity for the research area. A tenured staff started in August 2010, followed by a Post.Doc (Biczók) in December 2010. Read more...


The research area is a part of the following projects:


  • FP7 CleanSky: Network for Cloud Computing Eco-System (September 2014 - August 2018) [+]

    FP7 CleanSky: Network for Cloud Computing Eco-System (September 2014 - August 2018) [–]

    CleanSky ITN aims to develop innovative ideas in the emerging areas within the “eco-system” of cloud computing: data center evolution, consolidation and service migration, and beyond, via structural training of young researchers. To achieve this goal, a unique combination of academic institutions and industrial organizations will collaborate together and create a multidisciplinary (computer science, telecommunications, scientific computing and optimization theory), international (four European countries plus USA and China) and intersectoral (public and private; education and industry) environment to embed a pool of young researchers for innovative research in cloud computing.
  • FP7 CLIMBER: Cross-Layer Investigation and Integration of Computing and Networking Aspects of Mobile Social Networks (April 2013 - March 2017) [–]

    The explosive evolution of information and communication technologies enables online social networking (OSN) systems such as MySpace, Facebook, Twitter, etc, to connect active users of similar interests, conversing with one another and forming virtual communities. Nowadays the social networks are increasingly accessed via mobile devices thus rendering a new research field of mobile social networks (MSNs). A few interesting research and development results about MSNs have been reported in the literature. The majority of them, however, focus on user applications running on mobile devices and pay little attention to the underlying mobile communication networks. Since the underlying wireless networks play an equally important role in the success of OSN systems, MSNs are regarded in this proposal as a marriage of the traditional wired-network-based social networks with mobile wireless communication networks. The overall objective of this project is to cross-fertilise and share ideas in order to accelerate the development, transfer and deployment of research knowledge in the field of MSNs.
  • ALLEGRA: Large-scale experiments on geo-location aware greedy routing architecture (part of EU FP7 IP OpenLab) [+]

    ALLEGRA: Large-scale experiments on geo-location aware greedy routing architecture (part of EU FP7 IP OpenLab) [–]

    Due to the scalability issues of the Internet routing system, serious research efforts have been targeted at the “clean-slate” redesign of the routing fabric at use. In addition to inherent scalability, successful alternative mechanisms have to exhibit excellent failure tolerance and recovery, and support for multipath and multicast routing to boost one-to-one and one-to-many traffic scenarios. This proposal aims at the deployment and “proof-of-concept” testing of a lightweight greedy geographical routing algorithm in the OpenLab FP7 facility. By using the geolocation service of Spotter built on top of PlanetLab, we set up metrically embedded world-scale overlay topologies and perform greedy routing experiments over the constituting PlanetLab Europe nodes. Our experiments span over functional tests, multicast and multipath measurements, and error tolerance scenarios. We also deploy and test content delivery services over the designed overlay topology. Such practical, world-scale realization of one of the most promising theoretical future routing mechanisms and conducting the proposed experiments will significantly further the state of Future Internet research in Europe, as well as at the global level.



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Please contact the research area coordinator Professor Yuming Jiang.

2014/05/13 09:37, Yuming Jiang