Browsing NTNU Open by Author "Kellerer, Wolfgang"

Now showing items 1-8 of 8

    • 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 ...

    • 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 ...

    • Comparing the Scalability of Communication Networks and Systems 

      Hossfeld, Tobias; Heegaard, Poul Einar; Kellerer, Wolfgang (Journal article; Peer reviewed, 2023)
      Scalability is often mentioned in literature, but a stringent definition is missing. In particular, there is no general scalability assessment which clearly indicates whether a system scales or not or whether a system ...

    • Definition and Application of the Scalability Index: Example of 5G Network Slicing 

      Hossfeld, Tobias; Heegaard, Poul Einar; Kellerer, Wolfgang (Journal article; Peer reviewed, 2024)
      Scalability is of key interest for communication networks and systems, and frequently mentioned in research. However, a framework for benchmarking the scalability of two or more systems is missing. Therefore, we establish ...

    • Guest Editors Introduction: Special Issue on Advanced Management of Softwarized Networks 

      Kellerer, Wolfgang; Schembra, Giovanni; Hwang, Jinho; Kamiyama, Noriaki; Kang, Joon-Myung; Martini, Barbara; Pasquini, Rafael; Pezaros, Dimitrios; Zhang, Hongke; Zhani, Mohamed Faten; Zinner, Thomas (Journal article; Peer reviewed, 2021)
      The Softwarization of networks is enabled by the SDN (Software-Defined Networking), NV (Network Virtualization), and NFV (Network Function Virtualization) paradigms, and offers many advantages for network operators, service ...

    • Guest Editors' Introduction: Special Section on Smart Management of Future Softwarized Networks 

      Schembra, Giovanni; Kellerer, Wolfgang; Jacquenet, Christian; Kamiyama, Noriaki; Martini, Barbara; Pasquini, Rafael; Pezaros, Dimitrios; Riggio, Roberto; Zhang, Hongke; Zhani, Mohamed Faten; Zinner, Thomas (Peer reviewed; Journal article, 2022)
      Network softwarization is one of the key enablers of the future Internet evolution, also supporting the road from the fifth generation (5G) to the next-generation communication systems, namely 6G, with their main objective ...

    • Network Sovereignty: A Novel Metric and Its Application on Network Design 

      Janardhanan, Shakthivelu; Samonaki, Maria; Heegaard, Poul Einar; Kellerer, Wolfgang; Mas Machuca, Carmen (Journal article; Peer reviewed, 2024)
      Most network planning problems in the literature consider metrics, such as cost, availability, and other technology-aware attributes. However, network operators now face new challenges in designing their networks to minimize ...

    • Sacrificing Efficiency for Quality of Experience: YouTube’s Redundant Traffic Behavior 

      Sieber, Christian; Heegaard, Poul Einar; Hoßfeld, Tobias; Kellerer, Wolfgang (Chapter, 2016)
      Internet traffic reports show that YouTube is one of the major sources of data traffic world-wide. Furthermore, the data traffic shifts from mostly fixed landlines to cellular data connections where bandwidth is sparse and ...