• 5G Network Slicing as an Enabler for Smart Distribution Grid Operations 

      Mendis, Handunneththi V. Kalpanie; Heegaard, Poul Einar; Kralevska, Katina (Journal article; Peer reviewed, 2019)
      The power distribution grid has to undergo substantial modifications in order to meet the future electricity needs. The increased flexibility in power consumption, local production and storage insist on smarter supervisory ...
    • A modeling approach for dependability analysis of smart distribution grids 

      Zerihun, Tesfaye Amare; Helvik, Bjarne Emil; Heegaard, Poul Einar (Chapter, 2018)
      The distribution grids are among the most critical infrastructures which integrates advanced control and communication technologies atop of power systems. This paper presents a comprehensive modeling framework suited to ...
    • A new QoE fairness index for QoE management 

      Hossfelt, Tobias; Skorin-Kapov, Lea; Heegaard, Poul Einar; Varela, Martin (Journal article; Peer reviewed, 2018)
      The user-centric management of networks and services focuses on the Quality of Experience (QoE) as perceived by the end user. In general, the goal is to maximize (or at least ensure an acceptable) QoE, while ensuring ...
    • A Survey on Network Resiliency Methodologies against Weather-based Disruptions 

      Kmiecik, Wojciech; Rak, Jacek; Medeiros, Carmo; Heegaard, Poul Einar; Mas Machuca, Carmen; André, Joao; Jorge, Luisa; Musumeci, Francesco; Voyiatzis, Artemios; Pasic, Alija; Tornatore, Massimo; Travanca, Rui; Furdek, Marija; Hmaity, Ali; Simpson, Steven; Babarczi, Peter; Martins, Lucia; Følstad, Eirik Larsen; Braun, Torsten (Chapter; Conference object; Peer reviewed, 2016)
      Due to the increasing dependence on network ser- vices of our society, research has recently been concentrating on enhancing traditional protection strategies to withstand large- scale failures, as in case of disaster ...
    • Achieving dependability in software-defined networking - a perspective 

      Helvik, Bjarne Emil; Heegaard, Poul Einar; Mendiratta, Veena (Chapter; Conference object; Peer reviewed, 2015)
      In this paper we take a closer look at the operationof software defined networking (SDN) in intra-domain networks.The focus is on the dependability issues related to interworking ofSDN controllers, network OS (NOS), and ...
    • An Empirical Study of Software Reliability in SDN Controllers 

      Vizarreta, Petra; Trivedi, Kishor; Helvik, Bjarne Emil; Heegaard, Poul Einar; Kellerer, Wolfgang; Mas Machuca, Carmen (Chapter, 2017)
      Software Defined Networking (SDN) exposes critical networking decisions, such as traffic routing or enforcement of the critical security policies, to a software entity known as the SDN controller. Controller software, as ...
    • An Experimental Platform for QoE Studies of WebRTC-based Multi-Party Video Communication 

      Ammar, Doreid; De Moor, Katrien; Heegaard, Poul Einar (Chapter, 2017)
      Web Real-Time Communication (WebRTC) enables easy to use, no installation, in browser applications such as Google hangout and appear.in. To increase the understanding of the Quality of Experience with the use of such ...
    • An Experimental Platform for QoE Studies of WebRTC-based Multi-Party Video Communication 

      Ammar, Doreid; De Moor, Katrien; Heegaard, Poul Einar (Journal article, 2018)
      Web Real-Time Communication (WebRTC) enables easy to use, no installation, in browser applications such as Google hangout and appear.in. To increase the understanding of the Quality of Experience with the use of such ...
    • An IP Multicast Framework for Routable Sample Value Communication in Transmission Grids 

      Adrah, Charles Mawutor; Yellajosula, Jaya R. A. K.; Kure, Oivind; Palma, David; Heegaard, Poul Einar (Journal article; Peer reviewed, 2019)
      The growth and deployment of digital substations based on IEC 61850 in power utility industry will spawn new opportunities for wide area systems. These include monitoring, protection and control applications that will ...
    • Assessing the maturity of SDN controllers with software reliability growth models 

      Vizarreta, Petra; Trivedi, Kishor; Helvik, Bjarne Emil; Heegaard, Poul Einar; Blenk, Andreas; Kellerer, Wolfgang; Mas Machuca, Carmen (Journal article; Peer reviewed, 2018)
      In software defined networking (SDN), critical control plane functions are offloaded to a software entity known as the SDN controller. Today's SDN controllers are complex software systems, owing to heterogeneity of networks ...
    • Availability Modelling of Software-Defined Backbone Networks 

      Kamisinski, Andrzej; Gonzalez, Andres Javier; Helvik, Bjarne Emil; Nencioni, Gianfranco; Heegaard, Poul Einar (Chapter; Conference object; Peer reviewed, 2016)
      Software-Defined Networking (SDN) promises to improve the programmability and flexibility of networks, but it may also bring new challenges that need to be explored. The main objective of this paper is to present a ...
    • Cooperation through pheromone sharing in swarm routing 

      Kjeldsen, Vebjørn (Master thesis, 2007)
      Traditional routing protocols build routing tables that are optimized on one parameter only, this parameter is typically hop counts. With the introduction of new requirements, brought forth by a wide range of communication ...
    • Dashboard for Quality of Experience Studies of WebRTC Based Video Communication 

      Melhoos, Marianne Rie (Master thesis, 2016)
      WebRTC-based applications and services have become more and more popular over the last years. These types of applications support Real-Time Communication (RTC) with audio, video and sometimes also data sharing. WebRTC-based ...
    • Deep Semantics Inspection over Big Network Data at Wire Speed 

      Cheng, Yu; Hu, Chengchen; Jiang, Yuming; Heegaard, Poul Einar; Li, Hao (Peer reviewed; Journal article, 2016)
      Deep semantics inspection (DSI), proposed in this article, reveals the semantics behind big network data on the fly. The key idea of DSI is to obtain a sketch of user behavior at wire speed, with a size several orders of ...
    • Definition of QoE Fairness in Shared Systems 

      Hossfelt, Tobias; Skorin-Kapov, Lea; Heegaard, Poul Einar; Varela, Martin (Journal article; Peer reviewed, 2016)
      User-centric service and application management focuses on the Quality of Experience (QoE) as perceived by the end user. Thereby, the goal is to maximize QoE while ensuring fairness among users, e.g., for resource allocation ...
    • Dependability Differentiation in Cloud Services 

      Chilwan, Ameen (Master thesis, 2011)
      As cloud computing is becoming more mature and pervasive, almost all types of services are being deployed in clouds. This has also widened the spectrum of cloud users which encompasses from domestic users to large companies. ...
    • Dependability in Interdependent Digital Ecosystems 

      Hettervik, Martin Hagen (Master thesis, 2015)
      Advances in information and communications technology (ICT) encourages the interconnection of ICT systems with traditional monolithic systems, creating complex systems of systems. A modern variety of such systems is the ...
    • Dependability of the NFV Orchestrator: State of the Art and Research Challenges 

      Gonzalez, Andres Javier; Nencioni, Gianfranco; Kamisinski, Andrzej; Helvik, Bjarne Emil; Heegaard, Poul Einar (Journal article; Peer reviewed, 2018)
      The introduction of network function virtualisation (NFV) represents a significant change in networking technology, which may create new opportunities in terms of cost efficiency, operations, and service provisioning. ...
    • Design av løsning for automatisk måleravlesning av strøm (AMS) 

      Steinsland, Tor-Erik (Master thesis, 2011)
      Smart metering should be fully deployed before January 1st 2017 in Norway. The smart meters should be able to report consumption on a hourly basis, meaning that the amount of meter data will increase drastically. This ...
    • Digital Money Substitutes in a Two Sided Marked Perspective - A Case Study on Bitcoin 

      Malmo, Espen Sunde (Master thesis, 2013)
      In January 2009 a payment system that enabled transactions in a new digital currency, called bitcoin, were launched. Bitcoin is based on a peer-to-peer (P2P) network where users in the network collectively process and ...