Bjarne Emil Helvik

About

Academic degrees:

1975: Siv.ing. (MSc in Technology)
1982: Dr. Techn.

Work experience:

1975: Scientific assistant, NTH;
1981: Doctor research fellowship (NTNF);
1976 - 1997: Scientist, Head of Section, Senior Scientist, and Principal Research Scientist at ELAB, DELAB, SINTEF Telecom and Informatics;
1988 - 1997: Adjunct professor at the Department of Computer Engineering and Telematics (IDT), NTH;
1997 -2016: Professor, Department of Telematics, NTNU;
2003 - 2012: Principal investigator, Norwegian Centre of Excellence Q2S - the Centre for Quantifiable Quality of Service in Communication Systems;
2009 - 2017: Vice Dean of Research, IME-NTNU;
2017 - 2021: Professor, Department of Information Security and Communication Technology, NTNU
2020 - 2021: WP leader/PI, Centre for Research-based Innovation – Norwegian Center for Cybersecurity in Critical Sectors (NORCICS)
2022 - …: Professor Emeritus

Fields of interest

Dependability modelling, analysis and simulation, analysis of operational data,
Communication network dependability; design & management for resilience and survivability,
Software reliability,
Fault-tolerant systems,
Combined security and dependability evaluation, probabilistic approaches in security,
Architecture of ICT systems (Emphasis on dependability issues),
QoS in communication networks and services.

Current research focuses on ensuring dependability in services provided by multi-domain, virtualised ICT systems. Primary applications are 5G (SDN, NFV, Slicing, ...), BlockChains and SmartGrids.

Excerpts of professional activities:

Editing:

Computer communications, Special Issue on Reliable Network-based Services (RNS)
Networks, Special Issue on Resilience of Communication Networks to Random Failures and Disasters

TPC chair:

RNDM 2018 - International Workshop on Resilient Networks Design and Modeling
Networking 2014,
9th International Workshop on Rare Event Simulation,
DRCN11 International Conference on the Design of Reliable Communication Networks,
EURO NGI 2007 (Euro-NGI Conference on Next Generation Internet Networks.)

Research

Fields of interest and current research activities

Dependability modelling, analysis and simulation, analysis of operational data.
Communication network dependability; design & management for resilience and survivability,
Combined security and dependability evaluation, probabilistic approaches in security,
Architecture of networking/telecommunication systems (Emphasis on dependability issues),
Software reliability,
Fault-tolerant systems,
QoS in communication networks and services,
Multi-domain and -provider service level agreements (SLAs).

The current research focus is on ensuring the dependability of services provided by multi-domain, virtualised ICT systems. Primary applications are 5G and beyond (SDN, NFV, Slicing, ...), BlockChains and SmartGrids.

Networking Research Group

Publications

2025

Austad, Henrik; Mathisen, Geir; Helvik, Bjarne Emil. (2025) Deterministic Networks for Low-Latency Cyber-Physical Systems. NTNU Norges teknisk-naturvitenskapelige universitet NTNU Norges teknisk-naturvitenskapelige universitet
Doctoral dissertation

2024

Patil, Amit Dilip; Meer, Hermann De; Heegaard, Poul Einar; Helvik, Bjarne Emil. (2024) Modeling protection systems in smart active distribution grids for a performance analysis. Energy informatics review.
Academic article

2023

Austad, Henrik; Jellum, Erling Rennemo; Hendseth, Sverre; Mathisen, Geir; Bryne, Torleiv Håland; Gregertsen, Kristoffer Nyborg. (2023) Composable distributed real-time systems with deterministic network channels. Journal of systems architecture
Academic article

2022

Gebraselase, Befekadu; Adrah, Charles Mawutor; Zerihun, Tesfaye Amare; Helvik, Bjarne Emil; Heegaard, Poul Einar. (2022) Blockchain Support For Time-Critical Self-Healing In Smart Distribution Grids.
Academic chapter/article/Conference paper
Gebraselase, Befekadu; Helvik, Bjarne Emil; Jiang, Yuming. (2022) Bitcoin P2P Network Measurements: A Testbed Study of the Effect of Peer Selection on Transaction Propagation and Confirmation Times. IEEE Transactions on Network and Service Management
Academic article

2021

Garau, Michele; Muka, Romina; Heegaard, Poul Einar; Helvik, Bjarne Emil. (2021) Co-simulation and Discrete Event Simulation for Reliability Assessment of Power System and ICT: A Comparison.
Academic chapter/article/Conference paper
Gebraselase, Befekadu Gezaheng; Helvik, Bjarne Emil; Jiang, Yuming. (2021) Transaction Characteristics of Bitcoin.
Academic chapter/article/Conference paper
Gebraselase, Befekadu Gezaheng; Helvik, Bjarne Emil; Jiang, Yuming. (2021) An Analysis of Transaction Handling in Bitcoin.
Academic chapter/article/Conference paper
Tola, Besmir; Jiang, Yuming; Helvik, Bjarne Emil. (2021) Model-Driven Availability Assessment of the NFV-MANO with Software Rejuvenation. IEEE Transactions on Network and Service Management
Academic article
Garau, Michele; Helvik, Bjarne Emil. (2021) Power Unavailability Reduction in Distribution Grid Fault Management with Entropy Minimization.
Academic chapter/article/Conference paper
Gebraselase, Befekadu Gezaheng; Helvik, Bjarne Emil; Jiang, Yuming. (2021) Effect of Miner Incentive on the Confirmation Time of Bitcoin Transactions.
Academic chapter/article/Conference paper

2020

Tola, Besmir; Jiang, Yuming; Helvik, Bjarne Emil. (2020) On the Resilience of the NFV-MANO: An Availability Model of a Cloud-native Architecture.
Academic chapter/article/Conference paper
Kamisinski, Andrzej; Musumeci, Francesco; Hmaity, Ali; Tornatore, Massimo; Casazza, Marco; Farshad, Arsham. (2020) Resilient NFV Technology and Solutions.
Chapter
Zerihun, Tesfaye Amare; Garau, Michele; Helvik, Bjarne Emil. (2020) Effect of Communication Failures on State Estimation of 5G-Enabled Smart Grid. IEEE Access
Academic article
Helvik, Bjarne Emil; Vizarreta, Petra; Heegaard, Poul Einar; Trivedi, Kishor; Machuca, Carmen Mas. (2020) Modelling of Software Failures.
Chapter
Gonzalez, Andres J.; Ordonez-Lucena, Jose; Helvik, Bjarne Emil; Nencioni, Gianfranco; Xie, Min; Lopez, Diego R.. (2020) The Isolation Concept in the 5G Network Slicing.
Academic chapter/article/Conference paper
Rak, Jacek; Heegaard, Poul Einar; Helvik, Bjarne Emil. (2020) Resilience of communication networks to random failures and disasters: An optimization perspective. Networks
Academic article

2019

Tola, Besmir; Nencioni, Gianfranco; Helvik, Bjarne Emil; Jiang, Yuming. (2019) Modeling and Evaluating NFV-Enabled Network Services under Different Availability Modes.
Academic chapter/article/Conference paper
Zerihun, Tesfaye Amare; Helvik, Bjarne Emil. (2019) Dependability of Smart Distribution Grid Protection Using 5G.
Academic chapter/article/Conference paper
Amare, Tesfaye; Adrah, Charles Mawutor; Helvik, Bjarne Emil. (2019) A Method for Performability Study on Wide Area Communication Architectures for Smart Grid.
Academic chapter/article/Conference paper
Gebraselase, Befekadu Gezaheng; Helvik, Bjarne Emil; Jiang, Yuming. (2019) Suitability of Blockchains to Enable and Support Networking Functions: State of Art.
Academic chapter/article/Conference paper
Tola, Besmir; Nencioni, Gianfranco; Helvik, Bjarne Emil. (2019) Network-Aware Availability Modeling of an End-to-End NFV-Enabled Service. IEEE Transactions on Network and Service Management
Academic article
Rak, Jacek; Heegaard, Poul Einar; Helvik, Bjarne Emil. (2019) Highlights from RNDM 2018 – 10th Anniversary Workshop on Resilient Networks Design and Modeling. IEEE Communications Magazine
Abstract
Zerihun, Tesfaye Amare; Garau, Michele; Helvik, Bjarne Emil. (2019) Dependability Modeling and Analysis of 5G Based Monitoring System in Distribution Grids.
Academic chapter/article/Conference paper

2018

Vizarreta, Petra; Trivedi, Kishor; Helvik, Bjarne Emil; Heegaard, Poul Einar; Blenk, Andreas; Kellerer, Wolfgang. (2018) Assessing the Maturity of SDN Controllers with Software Reliability Growth Models. IEEE Transactions on Network and Service Management
Academic article
Heegaard, Poul Einar; Helvik, Bjarne Emil; Rak, Jacek. (2018) Proceedings 10th International Workshop on Resilient Networks Design and Modeling (RNDM). IEEE Press IEEE Press
Academic anthology/Conference proceedings
Nencioni, Gianfranco; Garroppo, Rosario G.; Gonzalez, Andres J.; Helvik, Bjarne Emil; Procissi, Gregorio. (2018) Orchestration and Control in Software-Defined 5G Networks: Research Challenges. Wireless Communications & Mobile Computing
Academic literature review
Oostenbrink, Jorik; Kuipers, Fernando; Heegaard, Poul Einar; Helvik, Bjarne Emil. (2018) Evaluating Local Disaster Recovery Strategies. Performance Evaluation Review
Academic article
Esposito, Christian; Gouglidis, Antonios; Hutchison, David; Gurtov, Andrei; Helvik, Bjarne Emil; Heegaard, Poul Einar. (2018) On the Disaster Resiliency within the Context of 5G Networks: The RECODIS Experience.
Academic chapter/article/Conference paper
Zerihun, Tesfaye Amare; Helvik, Bjarne Emil. (2018) Dependability Analysis of Smart Distribution Grid Architectures Considering Various Failure Modes.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Nencioni, Gianfranco; Kamisinski, Andrzej; Helvik, Bjarne Emil; Heegaard, Poul Einar. (2018) Dependability of the NFV Orchestrator: State of the Art and Research Challenges. IEEE Communications Surveys and Tutorials
Academic article
Zerihun, Tesfaye Amare; Helvik, Bjarne Emil; Heegaard, Poul Einar. (2018) A modeling approach for dependability analysis of smart distribution grids.
Academic chapter/article/Conference paper

2017

Vizarreta, Petra; Trivedi, Kishor; Helvik, Bjarne Emil; Heegaard, Poul Einar; Kellerer, Wolfgang; Machuca, Carmen Mas. (2017) An empirical study of software reliability in SDN controllers.
Academic chapter/article/Conference paper
Kamisiński, Andrzej; Helvik, Bjarne Emil; Gonzalez, Andres Javier; Nencioni, Gianfranco. (2017) Assessing the risk of violating SLA dependability requirements in software-defined networks.
Academic chapter/article/Conference paper
Tola, Besmir; Jiang, Yuming; Helvik, Bjarne Emil. (2017) Failure Process Characteristics of Cloud-Enabled Services.
Academic chapter/article/Conference paper
Vizarreta, Petra; Heegaard, Poul Einar; Helvik, Bjarne Emil; Kellerer, Wolfgang; Machuca, Carmen Mas. (2017) Characterization of Failure Dynamics in SDN Controllers.
Academic chapter/article/Conference paper
Nencioni, Gianfranco; Helvik, Bjarne Emil; Heegaard, Poul Einar. (2017) Including Failure Correlation in Availability Modeling of a Software-Defined Backbone Network. IEEE Transactions on Network and Service Management
Academic article

2016

Nencioni, Gianfranco; Helvik, Bjarne Emil; Gonzalez, Andres Javier; Heegaard, Poul Einar; Kamisinski, Andrzej. (2016) Availability Modelling of Software-Defined Backbone Networks.
Academic chapter/article/Conference paper
Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2016) The cost for meeting SLA dependability requirements; implications for customers and providers. Reliability Engineering & System Safety
Academic article
Gonzalez, Andres Javier; Nencioni, Gianfranco; Helvik, Bjarne Emil; Kamisinski, Andrzej. (2016) A Fault-Tolerant and Consistent SDN Controller.
Academic chapter/article/Conference paper
Nencioni, Gianfranco; Helvik, Bjarne Emil; Gonzalez, Andres Javier; Heegaard, Poul Einar; Kamisinski, Andrzej. (2016) Impact of SDN Controllers Deployment on Network Availability. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
Report
Heegaard, Poul Einar; Helvik, Bjarne Emil; Nencioni, Gianfranco; Wäfler, Jonas. (2016) Managed Dependability in Interacting Systems.
Academic chapter/article/Conference paper

2015

Heegaard, Poul Einar; Helvik, Bjarne Emil; Mendiratta, Veena. (2015) Achieving Dependability in Software-Defined Networking - A Perspective.
Academic chapter/article/Conference paper
Heegaard, Poul Einar; Helvik, Bjarne Emil; Trivedi, Kishor; Machida, Fumio. (2015) Survivability as a Generalization of Recovery.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Grønsund, Pål R.; Mahmood, Kashif; Helvik, Bjarne Emil; Heegaard, Poul Einar; Nencioni, Gianfranco. (2015) Service availability in the NFV Virtualized Evolved Packet Core.
Academic chapter/article/Conference paper
Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2015) Maximizing the reliability of dual homed, critical services in wireless/cellular networks. Optical Switching and Networkning Journal
Academic article
Gonzalez, Andres J.; Helvik, Bjarne Emil; Tiwari, Prakriti; Becker, Denis; Wittner, Otto J.. (2015) GEARSHIFT: Guaranteeing availability requirements in SLAs using hybrid fault tolerance.
Academic chapter/article/Conference paper

2014

Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2014) The Positive Impact of Failures on Energy Efficient Virtual Machines Consolidation.
Academic chapter/article/Conference paper
Zhang, Peiqing; Fotiou, Nikos; Helvik, Bjarne Emil; Marias, Giannis F.; Polyzos, George C.. (2014) Analysis of the effect of InfoRanking on content pollution in peer-to-peer systems. Security and Communication Networks
Academic article
Abdelkefi, Atef; Jiang, Yuming; Helvik, Bjarne Emil; Biczok, Gergely; Calu, Alexander. (2014) Assessing the service quality of an Internet path through end-to-end measurement. Computer Networks
Academic article
Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2014) Using genetic algorithms to improve the reliability of dual homed wireless critical services.
Academic chapter/article/Conference paper

2013

Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2013) Hybrid cloud management to comply efficiently with SLA availability guarantees.
Academic chapter/article/Conference paper
Cholda, Piotr; Helvik, Bjarne Emil. (2013) Reliable Network-Based Services. Computer Communications
Editorial
Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2013) Optimizing service continuity in a multi operator multi technology wireless environment.
Academic chapter/article/Conference paper
Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2013) Reliability modelling of access point selection and handovers in heterogeneous wireless environments.
Academic chapter/article/Conference paper
Myakotnykh, Eugene; Wittner, Otto; Helvik, Bjarne Emil; Abdelkefi, Atef; Helland, Jon Kåre; Kvittem, Olav Arne. (2013) An Analysis of Interdomain Availability and Causes of Failures Based on Active Measurements. Telecommunications Systems
Academic article
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2013) SLA success probability assessment in networks with correlated failures. Computer Communications
Academic article

2012

Paquereau, Laurent; Helvik, Bjarne Emil. (2012) Ant-based systems for wireless networks : retrospect and prospects.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2012) Guaranteeing SLA Availability in Telecommunications Networks.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2012) A Study of the Interval Availability and its Impact on SLAs Risk.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2012) Characterization of Router and Link Failure Processes in UNINETT’s IP Backbone Network. International Journal of Space-Based and Situated Computing (IJSSC)
Academic article
Zhang, Peiqing; Helvik, Bjarne Emil. (2012) Towards green P2P: Analysis of energy consumption in P2P and approaches to control.
Academic chapter/article/Conference paper
Zhang, Peiqing; Helvik, Bjarne Emil. (2012) Modeling Push-Based Live P2P Streaming by Stochastic Activity Networks. Journal of Digital Information Management
Academic article
Zhang, Peiqing; Helvik, Bjarne Emil. (2012) Modeling Push-Based Live P2P Streaming by Stochastic Activity Networks. Communications in Computer and Information Science (CCIS)
Academic article
Cholda, Piotr; Følstad, Eirik Larsen; Helvik, Bjarne Emil; Kuusela, Pirkko; Naldi, Maurizio; Norros, Ilkka. (2012) Towards risk-aware communications networking. Reliability Engineering & System Safety
Academic literature review
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2012) System Management to Comply with SLA Availability Guarantees in Cloud Computing.
Academic chapter/article/Conference paper

2011

Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2011) Failures and changes in cellular access networks; A study of field data.
Academic chapter/article/Conference paper
Cholda, Piotr; Helvik, Bjarne Emil. (2011) Proceedings of the 2011 8th International Workshop on the Design of Reliable Communication Networks. IEEE Press IEEE Press
Academic anthology/Conference proceedings
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2011) Analysis of Failures Characteristics in the UNINETT IP Backbone Network.
Academic chapter/article/Conference paper
Zhang, Peiqing; Helvik, Bjarne Emil. (2011) Modeling and analysis of P2P content distribution under coordinated attack strategies.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2011) Guaranteeing Service Availability in SLAs on Networks with Non Independent Failures.
Academic chapter/article/Conference paper
Ma, Huaiyuan; Helvik, Bjarne Emil; Wittner, Otto. (2011) An Impact of Addressing Schemes on Routing Scalability. Journal of Communications and Networks
Academic article
Secci, Stefano; Ma, Huaiyuan; Helvik, Bjarne Emil; Rougier, Jean-Louis. (2011) Resilient Inter-Carrier Traffic Engineering for Internet Peering Interconnections. IEEE Transactions on Network and Service Management
Academic article
Paquereau, Laurent; Helvik, Bjarne Emil. (2011) Ant-Based Multipath Routing for Wireless Mesh Networks. Lecture Notes in Computer Science (LNCS)
Academic article

2010

Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2010) Dynamic Sharing Mechanism for Guaranteed Availability in MPLS Based Networks.
Academic chapter/article/Conference paper
Zhang, Peiqing; Helvik, Bjarne Emil. (2010) Towards Green P2P: Understanding the Energy Consumption in P2P under Content Pollution.
Academic chapter/article/Conference paper
Ma, Huaiyuan; Helvik, Bjarne Emil; Wittner, Otto. (2010) The Stability of Compact Routing in Dynamic Inter-Domain Networks.
Academic chapter/article/Conference paper
Gonzalez, Martinez Andres; Helvik, Bjarne Emil. (2010) Guaranteeing Service Availability in SLAs; a Study of the Risk Associated with Contract Period and Failure Process. IEEE Latin America Transactions
Academic article
Zhang, Peiqing; Helvik, Bjarne Emil. (2010) Modeling QoS in P2P File-sharing with Benign and Malicious Peers by Stochastic Activity Networks.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Helvik, Bjarne Emil; Hellan, Jon K.; Kuusela, Pirkko. (2010) Analysis of Dependencies Between Failures in the UNINETT IP Backbone Network.
Academic chapter/article/Conference paper
Paquereau, Laurent; Helvik, Bjarne Emil. (2010) Opportunistic Ant-Based Path Management for Wireless Mesh Networks. Lecture Notes in Computer Science (LNCS)
Academic article
Paquereau, Laurent; Helvik, Bjarne Emil. (2010) Ensuring Fast Adaptation in an Ant-Based Path Management System. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
Academic article
Myakotnykh, Evgeniy; Helvik, Bjarne Emil; Hellan, Jon Kåre; Kvittem, Olav Arne; Skjesol, Trond; Wittner, Otto. (2010) Analyzing Causes of Failures in the Global Research Network Using Active Measurements.
Academic chapter/article/Conference paper
Myakotnykh, Evgeniy; Helvik, Bjarne Emil; Wittner, Otto; Kvittem, Olav; Helland, Jon Kåre; Skjesol, Trond. (2010) Measurement and Analysis of End-to-end Dependability Characteristics in the Global Network.
Academic chapter/article/Conference paper
Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2010) Determining dependencies in multi technology inter domain wireless access; A case study.
Academic chapter/article/Conference paper

2009

Moe, Marie Elisabeth Gaup; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2009) Comparison of the Beta and the Hidden Markov Models of Trust in Dynamic Environments.
Academic chapter/article/Conference paper
Moe, Marie Elisabeth Gaup; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2009) Comparison of the Beta and the Hidden Markov Models of Trust in Dynamic Environments. IFIP Advances in Information and Communication Technology
Academic article
Cholda, Piotr; Mykkeltveit, Anders; Helvik, Bjarne Emil; Jajszczyk, Andrzej. (2009) Continuity-based resilient communication.
Academic chapter/article/Conference paper
Zhang, Peiqing; Helvik, Bjarne Emil. (2009) Modeling reputation scheme in P2P file-sharing by stochastic activity networks.
Academic chapter/article/Conference paper
Hachana, Safaà; Montavont, Nicolas; Paquereau, Laurent; Helvik, Bjarne Emil. (2009) Exploiting Alternative Paths in MHWNs: A Source-Based QoS Routing Approach.
Academic chapter/article/Conference paper
Paquereau, Laurent; Helvik, Bjarne Emil. (2009) Ensuring Fast Adaptation in an Ant-Based Path Management System.
Academic chapter/article/Conference paper
Mykkeltveit, Anders; Helvik, Bjarne Emil. (2009) Adaptive management of connections to meet availability guarantees in SLAs.
Academic chapter/article/Conference paper
Paquereau, Laurent; Helvik, Bjarne Emil. (2009) Revisiting the Auto-Regressive Functions of the Cross-Entropy Ant System. Lecture Notes in Computer Science (LNCS)
Academic article
Ma, Huaiyuan; Helvik, Bjarne Emil; Wittner, Otto. (2009) A compact routing scheme with lower stretch.
Academic chapter/article/Conference paper
Gonzalez, Martinez Andres; Helvik, Bjarne Emil. (2009) Guaranteeing Service Availability in SLAs; A Study of the Risk Associated with Contract Period and Failure Process.
Academic chapter/article/Conference paper
Myakotnykh, Eugene; Helvik, Bjarne Emil. (2009) Analysis of Evolution Scenarios for End-to-end Quality of Services Provisioning in the Internet.
Academic chapter/article/Conference paper
Ma, Huaiyuan; Wittner, Otto; Helvik, Bjarne Emil. (2009) A Stochastic Clustering Algorithm for Swarm Compact Routing.
Academic chapter/article/Conference paper
Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2009) Managing availability in wireless inter domain access.
Academic chapter/article/Conference paper

2008

Mykkeltveit, Anders; Helvik, Bjarne Emil. (2008) Dependability differentiation in communication networks. Norges teknisk-naturvitenskapelige universitet Doctoral Theses at NTNU, 1503-8181 (2008:312)
Doctoral dissertation
Heegaard, Poul Einar; Helvik, Bjarne Emil; Wittner, Otto Jonassen. (2008) The Cross Entropy Ant System for Network Path Management. Telektronikk
Academic article
Paquereau, Laurent; Helvik, Bjarne Emil. (2008) Simulation of Wireless Multi-* Networks in NS-2.
Academic chapter/article/Conference paper
Meling, H; Montresor, A; Helvik, Bjarne Emil; Babaoglu, O. (2008) Jgroup/ARM: a distributed object group platform with autonomous replication management. Software, Practice & Experience
Academic article
Moe, Marie Elisabeth Gaup; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2008) TSR: trust-based secure MANET routing using HMMs.
Academic chapter/article/Conference paper
Meling, Hein; Montresor, Alberto; Helvik, Bjarne E.; Babaoglu, Ozalp. (2008) Jgroup/ARM: a distributed object group platform with autonomous replication management. Software, Practice & Experience
Academic article
Grosan, Crina; Abraham, Ajith; Helvik, Bjarne Emil. (2008) Building Multiobjective Resilient Networks.
Academic chapter/article/Conference paper
Mykkeltveit, Anders; Helvik, Bjarne Emil. (2008) Application of the RESTART/Splitting technique to network resilience studies in NS2.
Academic chapter/article/Conference paper

2007

Helvik, Bjarne Emil; Sallhammar, Karin; Knapskog, Svein Johan. (2007) Integrated Dependability and Security Evaluation Using Game Theory and Markov Models.
Academic chapter/article/Conference paper
Sallhammar, Karin; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2007) A Framework for Predicting Security and Dependability Measures in Real-time. International Journal of Computer Science and Network Security
Academic article
Emstad, Peder Johannes; Heegaard, Poul Einar; Helvik, Bjarne Emil; Paquereau, Laurent. (2007) Dependability and performance with discrete event simulation. Tapir Akademisk Forlag Tapir Akademisk Forlag
Compendium
Cholda, Piotr; Mykkeltveit, Anders; Helvik, Bjarne Emil; Wittner, Otto Jonassen; Jajszczyk, Andrzej. (2007) A Survey of Resilience Differentiation Frameworks in Communication Networks. IEEE Communications Surveys and Tutorials
Academic article
Emstad, Peder Johannes; Helvik, Bjarne Emil; Kure, Øivind. (2007) 3rd EuroNGI Conference on Next Generation Internet Networks, Design and Engineering for Heterogeneity. IEEE (Institute of Electrical and Electronics Engineers) IEEE (Institute of Electrical and Electronics Engineers)
Academic anthology/Conference proceedings

2006

Li, Frank Y.; Stol, Norvald; Helvik, Bjarne E.. (2006) Conformance Deterioration in QoS Networks: Phenomenon, Analysis and Elimination. Computer Networks
Academic article
Gan, Qitao; Helvik, Bjarne Emil. (2006) Dependability Modelling and Analysis of Networks as Taking Routing and Traffic into Account.
Academic chapter/article/Conference paper
Paquereau, Laurent; Helvik, Bjarne Emil. (2006) A Module-Based Wireless Node for ns-2.
Academic chapter/article/Conference paper
Li, Frank; Stol, Norvald; Helvik, Bjarne Emil. (2006) Conformance deterioration in QoS networks: Phenomenon, analysis and elimination. Computer Networks
Academic article
Sallhammar, Karin; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2006) On Stochastic Modeling for Integrated Security and Dependability Evaluation. Journal of Networks
Academic article

2005

Andreassen, Ragnar; Sudbø, Aasmund; Bjørnstad, Steinar; Helvik, Bjarne Emil; Hodne, Erik; Wikshaaland, Sigbjørn. (2005) Fault tolerance in a TWC/AWG based optical burst switching node architecture.
Academic chapter/article/Conference paper
Andreassen, Ragnar; Helvik, Bjarne Emil; Sudbø, Aasmund; Zouganeli, Evi. (2005) A study of fault tolerant architectures for electronic in- and egress interconnections in optical burst/packet switched networks.
Academic chapter/article/Conference paper
Sallhammar, Karin; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2005) Incorporating Attacker Behavior in Stochastic Models of Security.
Academic chapter/article/Conference paper
Sallhammar, Karin; Knapskog, Svein Johan; Helvik, Bjarne Emil. (2005) Using Stochastic Game Theory to Compute the Expected Behavior of Attackers.
Academic chapter/article/Conference paper
Heegaard, Poul Einar; Wittner, Otto; Helvik, Bjarne Emil. (2005) Self-managed virtual path management in dynamic networks. Lecture Notes in Computer Science (LNCS)
Academic article
Heegaard, Poul Einar; Helvik, Bjarne Emil; Andreassen, Ragnar. (2005) Application of Rare Event Techniques to Trace Driven Simulation.
Academic chapter/article/Conference paper
Wittner, Otto; Helvik, Bjarne Emil; Nicola, Victor Fouad. (2005) Internet Failure Protection using Hamiltonian p-Cycles found by Ant-like Agents.
Academic chapter/article/Conference paper
Bjørnstad, Steinar; Sudbø, Aasmund; Andreassen, Ragnar; Zouganelli, Evi; Stol, Norvald; Helvik, Bjarne Emil. (2005) Node redundancy in optical burst and packet switched networks.
Academic chapter/article/Conference paper
Helvik, Bjarne Emil; Meling, Hein (ITEM - NTNU); Montresor, Alberto. (2005) An approach to experimentally obtain service dependability characteristics of the Jgroup/ARM system. Lecture Notes in Computer Science (LNCS)
Academic article
Heegaard, Poul Einar; Wittner, Otto; Helvik, Bjarne Emil. (2005) Self-management of virtual paths in dynamic networks. Lecture Notes in Computer Science (LNCS)
Academic article
Helvik, Bjarne E.; Meling, Hein; Montresor, Alberto. (2005) An approach to experimentally obtain service dependability characteristics of the Jgroup/ARM system. Lecture Notes in Computer Science (LNCS)
Academic article
Zouganeli, Evi; Solheim, Astrid; Kjølnesberg, Heidi; Andreassen, Ragnar; Feng, Boning; Stol, Norvald. (2005) Techno-Economic Evaluation of Optical Packet/Burst Switching. IEE Conference Publication
Academic article
Zouganeli, Evi; Andreassen, Ragnar Ø; Feng, Boning; Solem, Astrid; Stol, Norvald; Kjønsberg, Heidi. (2005) Why bother with optical packets? An evaluation of the viability of optical packet/burst switching. Telektronikk
Academic article
Sallhammar, Karin; Knapskog, Svein Johan; Helvik, Bjarne Emil. (2005) Building a Stochastic Model for Security and Trust Assessment Evaluation. ERCIM News
Academic article
Zouganeli, Evi; Andreassen, Ragnar; Feng, Boning; Solem, Astrid; Stol, Norvald; Kjønsberg, Heidi. (2005) Why bother with optical packets? An evaluation of the viability of optical packet/burst switching. Telektronikk
Academic article

2004

Helvik, Bjarne E.; Meling, Hein; Montresor, Alberto. (2004) An Approach to Experimentally Obtain Service Dependability Characteristics of the Jgroup/ARM System. Universitetet i Stavanger Universitetet i Stavanger
Report
Wittner, Otto; Helvik, Bjarne Emil. (2004) Distributed Soft Policy Enforcement by Swarm Intelligence; Application to Loadsharing and Protection. Annales des télécommunications
Academic article
Helvik, Bjarne Emil. (2004) Perspectives on the Dependability of Networks and Services. Telektronikk
Academic article

Journal publications

Patil, Amit Dilip; Meer, Hermann De; Heegaard, Poul Einar; Helvik, Bjarne Emil. (2024) Modeling protection systems in smart active distribution grids for a performance analysis. Energy informatics review.
Academic article
Austad, Henrik; Jellum, Erling Rennemo; Hendseth, Sverre; Mathisen, Geir; Bryne, Torleiv Håland; Gregertsen, Kristoffer Nyborg. (2023) Composable distributed real-time systems with deterministic network channels. Journal of systems architecture
Academic article
Gebraselase, Befekadu; Helvik, Bjarne Emil; Jiang, Yuming. (2022) Bitcoin P2P Network Measurements: A Testbed Study of the Effect of Peer Selection on Transaction Propagation and Confirmation Times. IEEE Transactions on Network and Service Management
Academic article
Tola, Besmir; Jiang, Yuming; Helvik, Bjarne Emil. (2021) Model-Driven Availability Assessment of the NFV-MANO with Software Rejuvenation. IEEE Transactions on Network and Service Management
Academic article
Zerihun, Tesfaye Amare; Garau, Michele; Helvik, Bjarne Emil. (2020) Effect of Communication Failures on State Estimation of 5G-Enabled Smart Grid. IEEE Access
Academic article
Rak, Jacek; Heegaard, Poul Einar; Helvik, Bjarne Emil. (2020) Resilience of communication networks to random failures and disasters: An optimization perspective. Networks
Academic article
Tola, Besmir; Nencioni, Gianfranco; Helvik, Bjarne Emil. (2019) Network-Aware Availability Modeling of an End-to-End NFV-Enabled Service. IEEE Transactions on Network and Service Management
Academic article
Rak, Jacek; Heegaard, Poul Einar; Helvik, Bjarne Emil. (2019) Highlights from RNDM 2018 – 10th Anniversary Workshop on Resilient Networks Design and Modeling. IEEE Communications Magazine
Abstract
Vizarreta, Petra; Trivedi, Kishor; Helvik, Bjarne Emil; Heegaard, Poul Einar; Blenk, Andreas; Kellerer, Wolfgang. (2018) Assessing the Maturity of SDN Controllers with Software Reliability Growth Models. IEEE Transactions on Network and Service Management
Academic article
Nencioni, Gianfranco; Garroppo, Rosario G.; Gonzalez, Andres J.; Helvik, Bjarne Emil; Procissi, Gregorio. (2018) Orchestration and Control in Software-Defined 5G Networks: Research Challenges. Wireless Communications & Mobile Computing
Academic literature review
Oostenbrink, Jorik; Kuipers, Fernando; Heegaard, Poul Einar; Helvik, Bjarne Emil. (2018) Evaluating Local Disaster Recovery Strategies. Performance Evaluation Review
Academic article
Gonzalez, Andres Javier; Nencioni, Gianfranco; Kamisinski, Andrzej; Helvik, Bjarne Emil; Heegaard, Poul Einar. (2018) Dependability of the NFV Orchestrator: State of the Art and Research Challenges. IEEE Communications Surveys and Tutorials
Academic article
Nencioni, Gianfranco; Helvik, Bjarne Emil; Heegaard, Poul Einar. (2017) Including Failure Correlation in Availability Modeling of a Software-Defined Backbone Network. IEEE Transactions on Network and Service Management
Academic article
Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2016) The cost for meeting SLA dependability requirements; implications for customers and providers. Reliability Engineering & System Safety
Academic article
Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2015) Maximizing the reliability of dual homed, critical services in wireless/cellular networks. Optical Switching and Networkning Journal
Academic article
Zhang, Peiqing; Fotiou, Nikos; Helvik, Bjarne Emil; Marias, Giannis F.; Polyzos, George C.. (2014) Analysis of the effect of InfoRanking on content pollution in peer-to-peer systems. Security and Communication Networks
Academic article
Abdelkefi, Atef; Jiang, Yuming; Helvik, Bjarne Emil; Biczok, Gergely; Calu, Alexander. (2014) Assessing the service quality of an Internet path through end-to-end measurement. Computer Networks
Academic article
Cholda, Piotr; Helvik, Bjarne Emil. (2013) Reliable Network-Based Services. Computer Communications
Editorial
Myakotnykh, Eugene; Wittner, Otto; Helvik, Bjarne Emil; Abdelkefi, Atef; Helland, Jon Kåre; Kvittem, Olav Arne. (2013) An Analysis of Interdomain Availability and Causes of Failures Based on Active Measurements. Telecommunications Systems
Academic article
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2013) SLA success probability assessment in networks with correlated failures. Computer Communications
Academic article
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2012) Characterization of Router and Link Failure Processes in UNINETT’s IP Backbone Network. International Journal of Space-Based and Situated Computing (IJSSC)
Academic article
Zhang, Peiqing; Helvik, Bjarne Emil. (2012) Modeling Push-Based Live P2P Streaming by Stochastic Activity Networks. Journal of Digital Information Management
Academic article
Zhang, Peiqing; Helvik, Bjarne Emil. (2012) Modeling Push-Based Live P2P Streaming by Stochastic Activity Networks. Communications in Computer and Information Science (CCIS)
Academic article
Cholda, Piotr; Følstad, Eirik Larsen; Helvik, Bjarne Emil; Kuusela, Pirkko; Naldi, Maurizio; Norros, Ilkka. (2012) Towards risk-aware communications networking. Reliability Engineering & System Safety
Academic literature review
Ma, Huaiyuan; Helvik, Bjarne Emil; Wittner, Otto. (2011) An Impact of Addressing Schemes on Routing Scalability. Journal of Communications and Networks
Academic article
Secci, Stefano; Ma, Huaiyuan; Helvik, Bjarne Emil; Rougier, Jean-Louis. (2011) Resilient Inter-Carrier Traffic Engineering for Internet Peering Interconnections. IEEE Transactions on Network and Service Management
Academic article
Paquereau, Laurent; Helvik, Bjarne Emil. (2011) Ant-Based Multipath Routing for Wireless Mesh Networks. Lecture Notes in Computer Science (LNCS)
Academic article
Gonzalez, Martinez Andres; Helvik, Bjarne Emil. (2010) Guaranteeing Service Availability in SLAs; a Study of the Risk Associated with Contract Period and Failure Process. IEEE Latin America Transactions
Academic article
Paquereau, Laurent; Helvik, Bjarne Emil. (2010) Opportunistic Ant-Based Path Management for Wireless Mesh Networks. Lecture Notes in Computer Science (LNCS)
Academic article
Paquereau, Laurent; Helvik, Bjarne Emil. (2010) Ensuring Fast Adaptation in an Ant-Based Path Management System. Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
Academic article
Moe, Marie Elisabeth Gaup; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2009) Comparison of the Beta and the Hidden Markov Models of Trust in Dynamic Environments. IFIP Advances in Information and Communication Technology
Academic article
Paquereau, Laurent; Helvik, Bjarne Emil. (2009) Revisiting the Auto-Regressive Functions of the Cross-Entropy Ant System. Lecture Notes in Computer Science (LNCS)
Academic article
Heegaard, Poul Einar; Helvik, Bjarne Emil; Wittner, Otto Jonassen. (2008) The Cross Entropy Ant System for Network Path Management. Telektronikk
Academic article
Meling, H; Montresor, A; Helvik, Bjarne Emil; Babaoglu, O. (2008) Jgroup/ARM: a distributed object group platform with autonomous replication management. Software, Practice & Experience
Academic article
Meling, Hein; Montresor, Alberto; Helvik, Bjarne E.; Babaoglu, Ozalp. (2008) Jgroup/ARM: a distributed object group platform with autonomous replication management. Software, Practice & Experience
Academic article
Sallhammar, Karin; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2007) A Framework for Predicting Security and Dependability Measures in Real-time. International Journal of Computer Science and Network Security
Academic article
Cholda, Piotr; Mykkeltveit, Anders; Helvik, Bjarne Emil; Wittner, Otto Jonassen; Jajszczyk, Andrzej. (2007) A Survey of Resilience Differentiation Frameworks in Communication Networks. IEEE Communications Surveys and Tutorials
Academic article
Li, Frank Y.; Stol, Norvald; Helvik, Bjarne E.. (2006) Conformance Deterioration in QoS Networks: Phenomenon, Analysis and Elimination. Computer Networks
Academic article
Li, Frank; Stol, Norvald; Helvik, Bjarne Emil. (2006) Conformance deterioration in QoS networks: Phenomenon, analysis and elimination. Computer Networks
Academic article
Sallhammar, Karin; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2006) On Stochastic Modeling for Integrated Security and Dependability Evaluation. Journal of Networks
Academic article
Heegaard, Poul Einar; Wittner, Otto; Helvik, Bjarne Emil. (2005) Self-managed virtual path management in dynamic networks. Lecture Notes in Computer Science (LNCS)
Academic article
Helvik, Bjarne Emil; Meling, Hein (ITEM - NTNU); Montresor, Alberto. (2005) An approach to experimentally obtain service dependability characteristics of the Jgroup/ARM system. Lecture Notes in Computer Science (LNCS)
Academic article
Heegaard, Poul Einar; Wittner, Otto; Helvik, Bjarne Emil. (2005) Self-management of virtual paths in dynamic networks. Lecture Notes in Computer Science (LNCS)
Academic article
Helvik, Bjarne E.; Meling, Hein; Montresor, Alberto. (2005) An approach to experimentally obtain service dependability characteristics of the Jgroup/ARM system. Lecture Notes in Computer Science (LNCS)
Academic article
Zouganeli, Evi; Solheim, Astrid; Kjølnesberg, Heidi; Andreassen, Ragnar; Feng, Boning; Stol, Norvald. (2005) Techno-Economic Evaluation of Optical Packet/Burst Switching. IEE Conference Publication
Academic article
Zouganeli, Evi; Andreassen, Ragnar Ø; Feng, Boning; Solem, Astrid; Stol, Norvald; Kjønsberg, Heidi. (2005) Why bother with optical packets? An evaluation of the viability of optical packet/burst switching. Telektronikk
Academic article
Sallhammar, Karin; Knapskog, Svein Johan; Helvik, Bjarne Emil. (2005) Building a Stochastic Model for Security and Trust Assessment Evaluation. ERCIM News
Academic article
Zouganeli, Evi; Andreassen, Ragnar; Feng, Boning; Solem, Astrid; Stol, Norvald; Kjønsberg, Heidi. (2005) Why bother with optical packets? An evaluation of the viability of optical packet/burst switching. Telektronikk
Academic article
Wittner, Otto; Helvik, Bjarne Emil. (2004) Distributed Soft Policy Enforcement by Swarm Intelligence; Application to Loadsharing and Protection. Annales des télécommunications
Academic article
Helvik, Bjarne Emil. (2004) Perspectives on the Dependability of Networks and Services. Telektronikk
Academic article

Books

Heegaard, Poul Einar; Helvik, Bjarne Emil; Rak, Jacek. (2018) Proceedings 10th International Workshop on Resilient Networks Design and Modeling (RNDM). IEEE Press IEEE Press
Academic anthology/Conference proceedings
Cholda, Piotr; Helvik, Bjarne Emil. (2011) Proceedings of the 2011 8th International Workshop on the Design of Reliable Communication Networks. IEEE Press IEEE Press
Academic anthology/Conference proceedings
Emstad, Peder Johannes; Helvik, Bjarne Emil; Kure, Øivind. (2007) 3rd EuroNGI Conference on Next Generation Internet Networks, Design and Engineering for Heterogeneity. IEEE (Institute of Electrical and Electronics Engineers) IEEE (Institute of Electrical and Electronics Engineers)
Academic anthology/Conference proceedings

Part of book/report

Gebraselase, Befekadu; Adrah, Charles Mawutor; Zerihun, Tesfaye Amare; Helvik, Bjarne Emil; Heegaard, Poul Einar. (2022) Blockchain Support For Time-Critical Self-Healing In Smart Distribution Grids.
Academic chapter/article/Conference paper
Garau, Michele; Muka, Romina; Heegaard, Poul Einar; Helvik, Bjarne Emil. (2021) Co-simulation and Discrete Event Simulation for Reliability Assessment of Power System and ICT: A Comparison.
Academic chapter/article/Conference paper
Gebraselase, Befekadu Gezaheng; Helvik, Bjarne Emil; Jiang, Yuming. (2021) Transaction Characteristics of Bitcoin.
Academic chapter/article/Conference paper
Gebraselase, Befekadu Gezaheng; Helvik, Bjarne Emil; Jiang, Yuming. (2021) An Analysis of Transaction Handling in Bitcoin.
Academic chapter/article/Conference paper
Garau, Michele; Helvik, Bjarne Emil. (2021) Power Unavailability Reduction in Distribution Grid Fault Management with Entropy Minimization.
Academic chapter/article/Conference paper
Gebraselase, Befekadu Gezaheng; Helvik, Bjarne Emil; Jiang, Yuming. (2021) Effect of Miner Incentive on the Confirmation Time of Bitcoin Transactions.
Academic chapter/article/Conference paper
Tola, Besmir; Jiang, Yuming; Helvik, Bjarne Emil. (2020) On the Resilience of the NFV-MANO: An Availability Model of a Cloud-native Architecture.
Academic chapter/article/Conference paper
Kamisinski, Andrzej; Musumeci, Francesco; Hmaity, Ali; Tornatore, Massimo; Casazza, Marco; Farshad, Arsham. (2020) Resilient NFV Technology and Solutions.
Chapter
Helvik, Bjarne Emil; Vizarreta, Petra; Heegaard, Poul Einar; Trivedi, Kishor; Machuca, Carmen Mas. (2020) Modelling of Software Failures.
Chapter
Gonzalez, Andres J.; Ordonez-Lucena, Jose; Helvik, Bjarne Emil; Nencioni, Gianfranco; Xie, Min; Lopez, Diego R.. (2020) The Isolation Concept in the 5G Network Slicing.
Academic chapter/article/Conference paper
Tola, Besmir; Nencioni, Gianfranco; Helvik, Bjarne Emil; Jiang, Yuming. (2019) Modeling and Evaluating NFV-Enabled Network Services under Different Availability Modes.
Academic chapter/article/Conference paper
Zerihun, Tesfaye Amare; Helvik, Bjarne Emil. (2019) Dependability of Smart Distribution Grid Protection Using 5G.
Academic chapter/article/Conference paper
Amare, Tesfaye; Adrah, Charles Mawutor; Helvik, Bjarne Emil. (2019) A Method for Performability Study on Wide Area Communication Architectures for Smart Grid.
Academic chapter/article/Conference paper
Gebraselase, Befekadu Gezaheng; Helvik, Bjarne Emil; Jiang, Yuming. (2019) Suitability of Blockchains to Enable and Support Networking Functions: State of Art.
Academic chapter/article/Conference paper
Zerihun, Tesfaye Amare; Garau, Michele; Helvik, Bjarne Emil. (2019) Dependability Modeling and Analysis of 5G Based Monitoring System in Distribution Grids.
Academic chapter/article/Conference paper
Esposito, Christian; Gouglidis, Antonios; Hutchison, David; Gurtov, Andrei; Helvik, Bjarne Emil; Heegaard, Poul Einar. (2018) On the Disaster Resiliency within the Context of 5G Networks: The RECODIS Experience.
Academic chapter/article/Conference paper
Zerihun, Tesfaye Amare; Helvik, Bjarne Emil. (2018) Dependability Analysis of Smart Distribution Grid Architectures Considering Various Failure Modes.
Academic chapter/article/Conference paper
Zerihun, Tesfaye Amare; Helvik, Bjarne Emil; Heegaard, Poul Einar. (2018) A modeling approach for dependability analysis of smart distribution grids.
Academic chapter/article/Conference paper
Vizarreta, Petra; Trivedi, Kishor; Helvik, Bjarne Emil; Heegaard, Poul Einar; Kellerer, Wolfgang; Machuca, Carmen Mas. (2017) An empirical study of software reliability in SDN controllers.
Academic chapter/article/Conference paper
Kamisiński, Andrzej; Helvik, Bjarne Emil; Gonzalez, Andres Javier; Nencioni, Gianfranco. (2017) Assessing the risk of violating SLA dependability requirements in software-defined networks.
Academic chapter/article/Conference paper
Tola, Besmir; Jiang, Yuming; Helvik, Bjarne Emil. (2017) Failure Process Characteristics of Cloud-Enabled Services.
Academic chapter/article/Conference paper
Vizarreta, Petra; Heegaard, Poul Einar; Helvik, Bjarne Emil; Kellerer, Wolfgang; Machuca, Carmen Mas. (2017) Characterization of Failure Dynamics in SDN Controllers.
Academic chapter/article/Conference paper
Nencioni, Gianfranco; Helvik, Bjarne Emil; Gonzalez, Andres Javier; Heegaard, Poul Einar; Kamisinski, Andrzej. (2016) Availability Modelling of Software-Defined Backbone Networks.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Nencioni, Gianfranco; Helvik, Bjarne Emil; Kamisinski, Andrzej. (2016) A Fault-Tolerant and Consistent SDN Controller.
Academic chapter/article/Conference paper
Heegaard, Poul Einar; Helvik, Bjarne Emil; Nencioni, Gianfranco; Wäfler, Jonas. (2016) Managed Dependability in Interacting Systems.
Academic chapter/article/Conference paper
Heegaard, Poul Einar; Helvik, Bjarne Emil; Mendiratta, Veena. (2015) Achieving Dependability in Software-Defined Networking - A Perspective.
Academic chapter/article/Conference paper
Heegaard, Poul Einar; Helvik, Bjarne Emil; Trivedi, Kishor; Machida, Fumio. (2015) Survivability as a Generalization of Recovery.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Grønsund, Pål R.; Mahmood, Kashif; Helvik, Bjarne Emil; Heegaard, Poul Einar; Nencioni, Gianfranco. (2015) Service availability in the NFV Virtualized Evolved Packet Core.
Academic chapter/article/Conference paper
Gonzalez, Andres J.; Helvik, Bjarne Emil; Tiwari, Prakriti; Becker, Denis; Wittner, Otto J.. (2015) GEARSHIFT: Guaranteeing availability requirements in SLAs using hybrid fault tolerance.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2014) The Positive Impact of Failures on Energy Efficient Virtual Machines Consolidation.
Academic chapter/article/Conference paper
Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2014) Using genetic algorithms to improve the reliability of dual homed wireless critical services.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2013) Hybrid cloud management to comply efficiently with SLA availability guarantees.
Academic chapter/article/Conference paper
Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2013) Optimizing service continuity in a multi operator multi technology wireless environment.
Academic chapter/article/Conference paper
Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2013) Reliability modelling of access point selection and handovers in heterogeneous wireless environments.
Academic chapter/article/Conference paper
Paquereau, Laurent; Helvik, Bjarne Emil. (2012) Ant-based systems for wireless networks : retrospect and prospects.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2012) Guaranteeing SLA Availability in Telecommunications Networks.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2012) A Study of the Interval Availability and its Impact on SLAs Risk.
Academic chapter/article/Conference paper
Zhang, Peiqing; Helvik, Bjarne Emil. (2012) Towards green P2P: Analysis of energy consumption in P2P and approaches to control.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2012) System Management to Comply with SLA Availability Guarantees in Cloud Computing.
Academic chapter/article/Conference paper
Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2011) Failures and changes in cellular access networks; A study of field data.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2011) Analysis of Failures Characteristics in the UNINETT IP Backbone Network.
Academic chapter/article/Conference paper
Zhang, Peiqing; Helvik, Bjarne Emil. (2011) Modeling and analysis of P2P content distribution under coordinated attack strategies.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2011) Guaranteeing Service Availability in SLAs on Networks with Non Independent Failures.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2010) Dynamic Sharing Mechanism for Guaranteed Availability in MPLS Based Networks.
Academic chapter/article/Conference paper
Zhang, Peiqing; Helvik, Bjarne Emil. (2010) Towards Green P2P: Understanding the Energy Consumption in P2P under Content Pollution.
Academic chapter/article/Conference paper
Ma, Huaiyuan; Helvik, Bjarne Emil; Wittner, Otto. (2010) The Stability of Compact Routing in Dynamic Inter-Domain Networks.
Academic chapter/article/Conference paper
Zhang, Peiqing; Helvik, Bjarne Emil. (2010) Modeling QoS in P2P File-sharing with Benign and Malicious Peers by Stochastic Activity Networks.
Academic chapter/article/Conference paper
Gonzalez, Andres Javier; Helvik, Bjarne Emil; Hellan, Jon K.; Kuusela, Pirkko. (2010) Analysis of Dependencies Between Failures in the UNINETT IP Backbone Network.
Academic chapter/article/Conference paper
Myakotnykh, Evgeniy; Helvik, Bjarne Emil; Hellan, Jon Kåre; Kvittem, Olav Arne; Skjesol, Trond; Wittner, Otto. (2010) Analyzing Causes of Failures in the Global Research Network Using Active Measurements.
Academic chapter/article/Conference paper
Myakotnykh, Evgeniy; Helvik, Bjarne Emil; Wittner, Otto; Kvittem, Olav; Helland, Jon Kåre; Skjesol, Trond. (2010) Measurement and Analysis of End-to-end Dependability Characteristics in the Global Network.
Academic chapter/article/Conference paper
Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2010) Determining dependencies in multi technology inter domain wireless access; A case study.
Academic chapter/article/Conference paper
Moe, Marie Elisabeth Gaup; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2009) Comparison of the Beta and the Hidden Markov Models of Trust in Dynamic Environments.
Academic chapter/article/Conference paper
Cholda, Piotr; Mykkeltveit, Anders; Helvik, Bjarne Emil; Jajszczyk, Andrzej. (2009) Continuity-based resilient communication.
Academic chapter/article/Conference paper
Zhang, Peiqing; Helvik, Bjarne Emil. (2009) Modeling reputation scheme in P2P file-sharing by stochastic activity networks.
Academic chapter/article/Conference paper
Hachana, Safaà; Montavont, Nicolas; Paquereau, Laurent; Helvik, Bjarne Emil. (2009) Exploiting Alternative Paths in MHWNs: A Source-Based QoS Routing Approach.
Academic chapter/article/Conference paper
Paquereau, Laurent; Helvik, Bjarne Emil. (2009) Ensuring Fast Adaptation in an Ant-Based Path Management System.
Academic chapter/article/Conference paper
Mykkeltveit, Anders; Helvik, Bjarne Emil. (2009) Adaptive management of connections to meet availability guarantees in SLAs.
Academic chapter/article/Conference paper
Ma, Huaiyuan; Helvik, Bjarne Emil; Wittner, Otto. (2009) A compact routing scheme with lower stretch.
Academic chapter/article/Conference paper
Gonzalez, Martinez Andres; Helvik, Bjarne Emil. (2009) Guaranteeing Service Availability in SLAs; A Study of the Risk Associated with Contract Period and Failure Process.
Academic chapter/article/Conference paper
Myakotnykh, Eugene; Helvik, Bjarne Emil. (2009) Analysis of Evolution Scenarios for End-to-end Quality of Services Provisioning in the Internet.
Academic chapter/article/Conference paper
Ma, Huaiyuan; Wittner, Otto; Helvik, Bjarne Emil. (2009) A Stochastic Clustering Algorithm for Swarm Compact Routing.
Academic chapter/article/Conference paper
Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2009) Managing availability in wireless inter domain access.
Academic chapter/article/Conference paper
Paquereau, Laurent; Helvik, Bjarne Emil. (2008) Simulation of Wireless Multi-* Networks in NS-2.
Academic chapter/article/Conference paper
Moe, Marie Elisabeth Gaup; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2008) TSR: trust-based secure MANET routing using HMMs.
Academic chapter/article/Conference paper
Grosan, Crina; Abraham, Ajith; Helvik, Bjarne Emil. (2008) Building Multiobjective Resilient Networks.
Academic chapter/article/Conference paper
Mykkeltveit, Anders; Helvik, Bjarne Emil. (2008) Application of the RESTART/Splitting technique to network resilience studies in NS2.
Academic chapter/article/Conference paper
Helvik, Bjarne Emil; Sallhammar, Karin; Knapskog, Svein Johan. (2007) Integrated Dependability and Security Evaluation Using Game Theory and Markov Models.
Academic chapter/article/Conference paper
Gan, Qitao; Helvik, Bjarne Emil. (2006) Dependability Modelling and Analysis of Networks as Taking Routing and Traffic into Account.
Academic chapter/article/Conference paper
Paquereau, Laurent; Helvik, Bjarne Emil. (2006) A Module-Based Wireless Node for ns-2.
Academic chapter/article/Conference paper
Andreassen, Ragnar; Sudbø, Aasmund; Bjørnstad, Steinar; Helvik, Bjarne Emil; Hodne, Erik; Wikshaaland, Sigbjørn. (2005) Fault tolerance in a TWC/AWG based optical burst switching node architecture.
Academic chapter/article/Conference paper
Andreassen, Ragnar; Helvik, Bjarne Emil; Sudbø, Aasmund; Zouganeli, Evi. (2005) A study of fault tolerant architectures for electronic in- and egress interconnections in optical burst/packet switched networks.
Academic chapter/article/Conference paper
Sallhammar, Karin; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2005) Incorporating Attacker Behavior in Stochastic Models of Security.
Academic chapter/article/Conference paper
Sallhammar, Karin; Knapskog, Svein Johan; Helvik, Bjarne Emil. (2005) Using Stochastic Game Theory to Compute the Expected Behavior of Attackers.
Academic chapter/article/Conference paper
Heegaard, Poul Einar; Helvik, Bjarne Emil; Andreassen, Ragnar. (2005) Application of Rare Event Techniques to Trace Driven Simulation.
Academic chapter/article/Conference paper
Wittner, Otto; Helvik, Bjarne Emil; Nicola, Victor Fouad. (2005) Internet Failure Protection using Hamiltonian p-Cycles found by Ant-like Agents.
Academic chapter/article/Conference paper
Bjørnstad, Steinar; Sudbø, Aasmund; Andreassen, Ragnar; Zouganelli, Evi; Stol, Norvald; Helvik, Bjarne Emil. (2005) Node redundancy in optical burst and packet switched networks.
Academic chapter/article/Conference paper

Report

Austad, Henrik; Mathisen, Geir; Helvik, Bjarne Emil. (2025) Deterministic Networks for Low-Latency Cyber-Physical Systems. NTNU Norges teknisk-naturvitenskapelige universitet NTNU Norges teknisk-naturvitenskapelige universitet
Doctoral dissertation
Nencioni, Gianfranco; Helvik, Bjarne Emil; Gonzalez, Andres Javier; Heegaard, Poul Einar; Kamisinski, Andrzej. (2016) Impact of SDN Controllers Deployment on Network Availability. Norges teknisk-naturvitenskapelige universitet Norges teknisk-naturvitenskapelige universitet
Report
Mykkeltveit, Anders; Helvik, Bjarne Emil. (2008) Dependability differentiation in communication networks. Norges teknisk-naturvitenskapelige universitet Doctoral Theses at NTNU, 1503-8181 (2008:312)
Doctoral dissertation
Emstad, Peder Johannes; Heegaard, Poul Einar; Helvik, Bjarne Emil; Paquereau, Laurent. (2007) Dependability and performance with discrete event simulation. Tapir Akademisk Forlag Tapir Akademisk Forlag
Compendium
Helvik, Bjarne E.; Meling, Hein; Montresor, Alberto. (2004) An Approach to Experimentally Obtain Service Dependability Characteristics of the Jgroup/ARM System. Universitetet i Stavanger Universitetet i Stavanger
Report

Outreach

2019

Lecture

Helvik, Bjarne Emil. (2019) Challenges with 5G Networks as a Base for Critical Infrastucture. Mobil Agenda; fagseminar: 5G sikkerhet , Simula Research Laboratory, Oslo - Fornebu 2019-06-13 - 2019-06-13

2018

Academic lecture

Esposito, Christian; Gouglidis, Antonios; Hutchison, David; Gurtov, Andrei; Helvik, Bjarne Emil; Heegaard, Poul Einar. (2018) On the Disaster Resiliency within the Context of 5G Networks: The RECODIS Experience. European Conference on Networks and Communications [EuCNC 2018] , Ljubljana 2018-06-18 - 2018-06-21

2015

Academic lecture

Helvik, Bjarne Emil. (2015) Keynote: Dependability of Non-engineered and Unmanaged System of Systems. 7th International Workshop on Reliable Networks Design and Modeling [RNDM 2015] , Münich 2015-10-05 - 2015-10-05

2014

Lecture

Gonzales, Andres; Helvik, Bjarne Emil. (2014) Robust Telecommunication Services - As vital as water and electricity?. Telenor Research Breakfast Meeting , Fornebu, Broadcasted to the Telenor Group word-wide 2014-06-20 - 2014-06-20
Academic lecture

Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2014) Using genetic algorithms to improve the reliability of dual homed wireless critical services. 6th International Workshop on Reliable Networks Design and Modeling [RNDM'14] , Barcelona 2014-11-17 - 2014-11-19

2013

Academic lecture

Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2013) Optimizing service continuity in a multi operator multi technology wireless environment. Design of Reliable Communication Networks (DRCN), 2013 9th International Conference , Budapest 2013-03-04 - 2013-03-07
Academic lecture

Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2013) Reliability modelling of access point selection and handovers in heterogeneous wireless environments. Design of Reliable Communication Networks (DRCN), 2013 9th International Conference , Budapest 2013-03-04 - 2013-03-07

2012

Academic lecture

Zhang, Peiqing; Helvik, Bjarne Emil. (2012) Towards green P2P: Analysis of energy consumption in P2P and approaches to control. the 2012 International Conference on High Performance Computing and Simulation, HPCS 2012 2012-07-02 - 2012-07-06
Academic lecture

Zhang, Peiqing; Helvik, Bjarne Emil. (2012) Modeling Push-Based Live P2P Streaming by Stochastic Activity Networks. 4th International Conference on Networked Digital Technologies 2012-04-24 - 2012-04-26
Academic lecture

Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2012) Finnes det garanti mot nedetid i dag og i fremtiden?. Digitale telenett - Teleforum på Kursdagene , Trondheim 2012-01-05 - 2012-01-06

2011

Academic lecture

Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2011) Failures and changes in cellular access networks; A study of field data. Design of Reliable Netwokrs, 8th International Workshop , Krakow 2011-10-10 - 2011-10-12
Academic lecture

Zhang, Peiqing; Helvik, Bjarne Emil. (2011) Modeling and analysis of P2P content distribution under coordinated attack strategies. IEEE Consumer Communications and Networking Conference [CCNC 2011]; , Las Vegas, NV 2011-01-08 - 2011-01-11
Academic lecture

Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2011) Analysis of Failures Characteristics in the UNINETT IP Backbone Network. IEEE Workshops of International Conference on Advanced Information Networking and Applications (WAINA), 2011 2011-03-22 - 2011-03-25
Academic lecture

Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2011) Stochastic Optimization for Allocate Connections under SLAs Guarantees. Workshop on Traffic Engineering and Dependability in the Network of the Future , Trondheum 2011-06-20 - 2011-06-21
Academic lecture

Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2011) Dependability in mobile access networks. Workshop on Traffic Engineering and Dependability in the Network of the Future , Trondheim 2011-06-21 - 2011-06-22

2010

Academic lecture

Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2010) Determining dependencies in multi technology inter domain wireless access; A case study. Globecom - Workshop on Mobile Computing and Emerging Communication Networks. , Miami 2010-12-10 - 2010-12-10
Academic lecture

Zhang, Peiqing; Helvik, Bjarne Emil. (2010) Towards Green P2P: Understanding the Energy Consumption in P2P under Content Pollution. 2010 IEEE/ACM International Conference on Green Computing and Communications (GreenCom 2010); EaCN-2010/GreenCom 2010-12-18 - 2010-12-20
Academic lecture

Myakotnykh, Evgeniy; Helvik, Bjarne Emil; Hellan, Jon Kåre. (2010) Measurement and Analysis of End-to-end Dependability Characteristics in the Global Network. Euro-NF Workshop on Traffic Engineering and Dependability in the Network of the Future , Warsaw 2010-04-15 - 2010-04-16
Academic lecture

Zhang, Peiqing; Helvik, Bjarne Emil. (2010) Modeling QoS in P2P File-sharing with Benign and Malicious Peers by Stochastic Activity Networks. 7th IEEE Consumer Communications and Networking Conference , Las Vegas 2010-01-09 - 2010-01-12
Academic lecture

Secci, Stefano; Ma, Huaiyuan; Helvik, Bjarne Emil; Rougier, Jean-Louis. (2010) A Resilient Routing Policy for Peering Management. GLOBECOM 2010 2010-12-06 - 2010-12-10
Academic lecture

Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2010) Analysis of Dependencies Between Failures in the UNINETT IP Backbone Network. IEEE Pacific Rim International Symposium on Dependable Computing, PRDC 2010 2010-12-13 - 2010-12-15
Academic lecture

Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2010) Correlation Between Failure Events and Geographical Distance in the UNINETT IP Backbone Network. Euro-NF workshop IA.7.3 2010-04-15 - 2010-04-16
Academic lecture

Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2010) Dynamic Sharing Mechanism for Guaranteed Availability in MPLS Based Networks. IEEE International Workshop Technical Committee on Communications Quality and Reliability, CQR 2010 2010-06-08 - 2010-06-10
Academic lecture

Myakotnykh, Evgeniy; Helvik, Bjarne Emil. (2010) Measurement and Analysis of End-to-end Dependability Characteristics in the Global Network. 18th International Workshop on Quality of Service (IWQoS), 2010 , Beijing 2010-06-16 - 2010-06-18

2009

Academic lecture

Mykkeltveit, Anders; Helvik, Bjarne Emil. (2009) Adaptive management of connections to meet availability guarantees in SLAs. IM 2009 Mini-conference , Hofstra University, Long Island, New York 2009-06-01 - 2009-06-05
Academic lecture

Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2009) Managing availability in wireless inter domain access. Ultra Modern Telecommunications & Workshops, 2009. ICUMT '09. International Conference on 2009-10-13 - 2009-10-14
Academic lecture

Zhang, Peiqing; Helvik, Bjarne Emil. (2009) Modeling Reputation Scheme in P2P File-sharing by Stochastic Activity Networks. The 8th IEEE International Conference on Dependable, Autonomic and Secure Computing , Chengdu 2009-12-12 - 2009-12-14
Academic lecture

Helvik, Bjarne Emil. (2009) Differentiated dependability in one network?. NTVA Technology Forum 2009 , Trondheim 2009-09-09 - 2009-09-09
Academic lecture

Moe, Marie Elisabeth Gaup; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2009) Comparison of the Beta and the Hidden Markov Models of Trust in Dynamic Environments. Third IFIP WG 11.11 International Conference, IFIPTM 2009 , West Lafayette, IN 2009-06-15 - 2009-06-19

2008

Academic lecture

Mykkeltveit, Anders; Helvik, Bjarne Emil. (2008) Comparison of Schemes for Provision of Differentiated Availability-guaranteed Services Using Dedicated Protection. Seventh International Conference on Networking (ICN) , Cancun 2008-04-13 - 2008-04-18
Academic lecture

Mykkeltveit, Anders; Helvik, Bjarne Emil. (2008) On Provision of Availability Guarantees Using Shared Protection. 12th Conference on Optical Network Design and Modelling (ONDM) , Vilanova la Geltru 2008-03-12 - 2008-03-14

2007

Academic lecture

Grosan, Crina; Abraham, Ajith; Helvik, Bjarne Emil. (2007) Multiobjective Evolutionary Algorithms for Sceduling Jobs on Computational Grids. International Conference, Applied Computing 2007 2007-02-18 - 2007-02-20
Academic lecture

Mykkeltveit, Anders; Helvik, Bjarne Emil. (2007) On provision of guaranteed availability using dedicated protection. EuroFGI Workshop on Traffic Engineering, Protection and Restoration for FGI , Fornebu/Oslo 2007-09-27 - 2007-10-27
Academic lecture

Mykkeltveit, Anders; Helvik, Bjarne Emil. (2007) Provision of connection-specific availability guarantees in communication networks. 6th International Workshop on Design of Reliable Communication Networks (DRCN 2007) , La Rochelle 2007-10-07 - 2007-10-10

2006

Interview

Helvik, Bjarne Emil. (2006) Tele og dataproblemer St Olav Hospital; Kan vi stole på tele og datasystemer? [Ordskifte - Aktalitetsprogram NRK1-Trøndelag]. Trondheim Trondheim [Radio] 2006-06-20
Academic lecture

Gan, Qitao; Helvik, Bjarne Emil; Wittner, Otto Jonassen. (2006) A Hybrid Modelling Approach for Analyzing Service Availability with Shared Path Protection in IP Networks. 10th International Conference on Communication Technology , Guilin 2006-11-27 - 2006-11-30
Academic lecture

Gan, Qitao; Helvik, Bjarne Emil; Wittner, Otto Jonassen. (2006) Refined Classification of Service Unavailability for Comparison: Shared Path Protection vs. Rerouting. 10th International Conference on Communication Technology , Guilin 2006-11-27 - 2006-11-30
Academic lecture

Zouganeli, Evi, Paraskevi; Andreassen, Ragnar; Feng, Boning; Solem, Astrid; Stol, Norvald; Sudbø, Aasmund Sveinung. (2006) Optical packets or electrical packets? An assessment of the viability of optical packet/burst switching. Northern Optics 2006 , Radisson SAS Hotel Norge, Bergen 2006-06-14 - 2006-06-16
Academic lecture

Helvik, Bjarne Emil. (2006) Swarm-based routing to achieve dependable networks. Dependability of all-IP networks; A multi-disciplinary workshop , Espoo (Helsinki) 2006-05-18 - 2006-05-19
Academic lecture

Gan, Qitao; Helvik, Bjarne Emil. (2006) Dependability Modelling and Analysis of Networks as Taking Routing and Traffic into Account. 2nd EURO-NGI Conference on Next Generation Internet Design and Engineering , Valencia 2006-04-03 - 2006-04-05
Academic lecture

Sallhammar, Karin; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2006) A Game-theoretic Approach to Stochastic Security and Dependability Evaluation. The 2nd IEEE International Symposium on Dependable, Autonomic and Secure Computing (DASC'06) , Indiana 2006-09-29 - 2006-10-01
Academic lecture

Mykkeltveit, Anders; Helvik, Bjarne Emil. (2006) Prospects for dependability differentiation in interdomain networks. EuroNGI Workshop on Traffic Engineering, Protection and Restoration for NGI , Krakow 2006-05-04 - 2006-05-05
Academic lecture

Mykkeltveit, Anders; Helvik, Bjarne Emil. (2006) Application of the RESTART/Splitting Technique in Object-Oriented Simulation. 6th International Workshop on Rare Event Simulation , Bamberg 2006-10-08 - 2006-10-10

2005

Academic lecture

Heegaard, Poul Einar; Helvik, Bjarne Emil; Andreassen, Ragnar. (2005) Application of Rare Event Techniques to Trace Driven Simulation. Winter Simulation Conference 2005 , Orlando 2005-12-04 - 2005-12-07
Academic lecture

Sallhammar, Karin; Knapskog, Svein Johan; Helvik, Bjarne Emil. (2005) Using Stochastic Game Theory to Compute the Expected Behavior of Attackers. The International Symposium on Applications and the Internet (SAINT 2005) Workshops , Trento 2005-02-01 - 2005-02-03
Academic lecture

Gan, Qitao; Helvik, Bjarne Emil. (2005) Limiting the State Space Explosion as Taking Dynamic Issues into Account in Network Modelling and Analysis. The second Norwegian Network Research Seminar , Fornebu 2005-10-27 - 2005-10-28
Academic lecture

Andreassen, Ragnar; Sudbø, Aasmund; Bjørnstad, Steinar; Helvik, Bjarne Emil; Hodne, Erik; Wikshaaland, Sigbjørn. (2005) Fault tolerance in a TWC/AWG based optical burst switching node architecture. The 5th International Workshop on Design of Reliable Communication Networks (DRCN'5) , Napoli 2005-10-16 - 2005-10-19
Academic lecture

Andreassen, Ragnar; Helvik, Bjarne Emil; Sudbø, Aasmund; Zouganeli, Evi. (2005) A study of fault tolerant architectures for electronic in- and egress interconnections in optical burst/packet switched networks. 9th Conference on Optical Network Design and Modelling (ONDM 2005) , Milano 2005-02-07 - 2005-02-09
Academic lecture

Helvik, Bjarne Emil; Meling, Hein; Montresor, Alberto. (2005) An approach to experimentally obtain service dependability characteristics of the Jgroup/ARM system. In European Dependable Computing Conference (EDCC-5).Springer Verlag. , Budapest 2005-04-20 - 2005-04-22
Academic lecture

Bjørnstad, Steinar; Sudbø, Aasmund; Andreassen, Ragnar; Zouganeli, Evi; Stol, Norvald; Helvik, Bjarne Emil. (2005) Node redundancy in optical burst and packet switched networks. 7th International Conference on Transparent Optical Networks (ICTON 2005) , Barcelona 2005-07-03 - 2005-07-07
Academic lecture

Sallhammar, Karin; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2005) Incorporating Attacker Behavior in Stochastic Models of Security. Proceedings of the 2005 International Conference on Security and Management (SAM'05) , Las Vegas 2005-06-20 - 2005-06-22
Academic lecture

Zouganeli, Evi; Andreassen, Ragnar; Feng, Boning; Stol, Norvald; Solem, Astrid; Helvik, Bjarne Emil. (2005) Optical packets, circuits, or packets and circuits: Viablility of optical packet/burst switching. The 10th OptoElectronics and Communications Conference (OECC 2005) , Seoul 2005-07-04 - 2005-07-08
Academic lecture

Wittner, Otto; Helvik, Bjarne Emil; Nicola, Victor Fouad. (2005) Internet Failure Protection using Hamiltonian p-Cycles found by Ant-like Agents. The 5th International Workshop on Design of Reliable Communication Networks (DRCN2005) , Island of Ischia 2005-10-16 - 2005-10-18
Academic lecture

Cholda, Piotr; Jajszczyk, Andrzej; Helvik, Bjarne Emil; Mykkeltveit, Anders. (2005) Service Differentiation Based on Recovery Methods. EURO NGI Workshop on Traffic Engineering, Protection and Restoration , Roma 2005-04-21 - 2005-04-23
Academic lecture

Helvik, Bjarne E.; Meling, Hein; Montresor, Alberto. (2005) An approach to experimentally obtain service dependability characteristics of the Jgroup/ARM system. Dependable Computing - EDCC 2005: 5th European Dependable Computing Conference , Budapest, Hungary 2005-04-20 - 2005-04-22
Academic lecture

Andreassen, Ragnar; Sudbø, Aasmund Sveinung; Bjørnstad, Steinar; Helvik, Bjarne; Hodne, E; Wikshåland, S. (2005) Fault tolerance in a TWC/AWG based optical burst switching node architecture. 5th International Workshop on Design of Reliable Communication Networks (DRCN2005) , Napoli 2005-10-16 - 2005-10-19
Academic lecture

Zouganeli, Evi; Solem, Astrid; Kjønsberg, Heidi; Andreassen, Ragnar; Feng, Boning; Stol, Norvald. (2005) Techno-Economic Evaluation of Optical Packet/ Burst Switching. European Conference on Optical Communication (ECOC 2005) , Glasgow 2005-09-25 - 2005-09-29
Academic lecture

Zouganeli, Evi; Andreassen, Ragnar; Feng, Boning; Solem, Astrid; Stol, Norvald; Sudbø, Aasmund Sveinung. (2005) Results from IST STOLAS: Optical packet/ burst switched networks using tunable lasers – design, architectures and attainable performance. Norwegian Network Research Seminar (NNRS2005) , Fornebu 2005-10-27 - 2005-10-28
Academic lecture

Bjørnstad, Steinar; Sudbø, Aasmund Sveinung; Andreassen, Ragnar; Zouganeli, Evi; Stol, Norvald; Helvik, Bjarne. (2005) Node redundancy in optical burst and packet switched networks. COST 291 workshop on “Issues and Challenges in Optical Networking , Barcelona 2005-06-03 - 2005-06-06
Academic lecture

Zouganeli, Evi; Andreassen, Ragnar; Feng, Boning; Stol, Norvald; Solem, Astrid; Helvik, Bjarne. (2005) Optical packets, circuits, or packets and circuits: Viability of optical packet/burst switching. Opto-electronics and Communications Conference (OECC 2005) , Seoul 2005-07-04 - 2005-07-08
Academic lecture

Andreassen, Ragnar; Helvik, Bjarne; Sudbø, Aasmund Sveinung; Zouganeli, Evi, Paraskevi. (2005) A Study of Fault Tolerant Architectures for Electronic In- and Egress Interconnections in Optical Burst/Packet Switched Networks. Ninth Conference on Optical Network Design and Modelling (ONDM) , Milano 2005-02-07 - 2005-02-09
Academic lecture

Zouganeli, Evi; Solheim, Astrid; Kjønsberg, Heidi; Andreassen, Ragnar; Feng, Boning; Stol, Norvald. (2005) Techno-Economic Evaluation of Optical Packet/Burst Switching. 31st European Conference on Optical Communication [ECOC 2005] , Glasgow 2005-09-25 - 2005-09-29

2004

Academic lecture

Wittner, Otto; Helvik, Bjarne Emil; Nicola, Victor Fouad. (2004) Link and Node Protection using Hamiltonian p-Cycles found by Ant-like Agents. In online proc. of Workshop on Traffic Engineering, Protection and Restoration for NGI , Lund 2004-05-27 - 2004-05-28
Academic lecture

Feng, Boning; Stol, Norvald; Zouganeli, Evi; Andreassen, Ragnar; Solem, Astrid; Haugen, Rolf B. (2004) Direct Comparison between Optical Circuit and Optical Packet/Burst Switching Using Simulations. Opto-electronics and Communications Conference and International Conference on Optical Internet (OECC/COIN 2004) , Yokohama 2004-07-12 - 2004-07-16
Academic lecture

Andreassen, Ragnar; Stol, Norvald; Zouganeli, Evi; Haugen, Rolf B; Helvik, Bjarne; Emstad, Peder. (2004) Application Dependent Performance of a Mesh Optical Burst Switched Network and Effect of Burst Size. European Conference on Optical Communication (ECOC 2003) and International Conference on Integrated Optics and Optical Fiber Communication (IOOC 2003) , Rimini 2004-09-21 - 2004-09-25
Academic lecture

Zouganeli, Evi; Stol, Norvald; Andreassen, Ragnar; Feng, Boning; Solem, Astrid; Haugen, Rolf B. (2004) Optical packet/burst switched networks using tunable lasers: Architectures, Migration and Viability. Norwegian Electrooptics Meeting , Tønsberg 2004-05-02 - 2004-05-04
Academic lecture

Meling, Hein; Helvik, Bjarne E.. (2004) Performance Consequences of Inconsistent Client-side Membership Information in the Open Group Model. The 23rd IEEE International Performance, Computing and Communications Conference , Phoenix, Arizona, USA 2004-04-15 - 2004-04-15
Academic lecture

Heegaard, Poul Einar; Wittner, Otto; Nicola, Victor; Helvik, Bjarne Emil. (2004) Theory: Distributed Asynchronous Algorithm for Cross-Entropy-Based Combinatorial Optimization. Norwegian Network Research Seminar 2004 , Trondheim 2004-10-21 - 2004-10-22
Academic lecture

Heegaard, Poul Einar; Wittner, Otto; Nicola, Victor; Helvik, Bjarne Emil. (2004) Distributed Asynchronous Algorithm for Cross-Entropy-Based Combinatorial Optimization. Rare Event Simulation and Combinatorial Optimization , Budapest 2004-09-07 - 2004-09-08
Academic lecture

Helvik, Bjarne Emil; Andreassen, Ragnar. (2004) Fault Tolerance in Optical Networks; A study of electronic in- and egress interconnections in Torus topologies. Seventeenth Nordic Teletraffic Seminar, Fornebu, Norway , Fornebu 2004-08-25 - 2004-08-27
Academic lecture

Andreassen, Ragnar; Helvik, Bjarne Emil. (2004) A note on traffic performance gain for optical burst/packet switching. 8th IFIP Working Conference on Optical Network Design and Modelling (ONDM 2004) , Ghent 2004-04-02 - 2004-04-04
Academic lecture

Aagesen, Finn Arve; Anutariya, Chutiporn; Shiaa, Mazen Malek; Helvik, Bjarne Emil; Supadulchai, Paramai. (2004) A Dynamic Configuration Architecture. IEEE/IFIP Network Operations and Management Symposium NOMS'2004 , Seoul 2004-04-01 - 2004-04-03
Academic lecture

Feng, Boning; Stol, Norvald; Zouganeli, Evi; Andreassen, Ragnar Ø.; Solem, Astrid; Haugen, Rolf B.. (2004) Direct comparison between optical circuit and optical packet / burst switching using simulations. OptoElectronics and Communications Conference/International Conference on Optical Internet (OECC/COIN2004) , Yokohama 2004-07-12 - 2004-07-16
Academic lecture

Meling, Hein; Helvik, Bjarne Emil. (2004) Performance Consequences of Inconsistent Client-side Membership Information in the Open Group Model. Proceedings of the 23rd IEEE International Performance, Computing and Communications Conference (IPCCC) , Phoenix, Arizona 2004-04-01 - 2004-04-03

2003

Academic lecture

Andreassen, Ragnar Ø.; Stol, Norvald; Zouganeli, Evi; Haugen, Rolf B.; Helvik, Bjarne Emil; Emstad, Peder Johannes. (2003) Application Dependent Performance of a Mesh Optical Burst Switched Network and Effect of Burst Size. 29th European Conference on Optical Communication (ECOC 2003) , Rimini, Italy 2003-09-25 -
Academic lecture

Zouganeli, Evi; Stol, Norvald; Andreassen, Ragnar Ø.; Helvik, Bjarne Emil; Haugen, Rolf B.; Emstad, Peder Johannes. (2003) Performance evaluation of a mesh optical burst switched network with tunable lasers and tunable wavelength converters. 7th International Conference on Telecommunications , Zagreb, Croatia 2003-06-13 -
Academic lecture

Zouganeli, Evi; Andreassen, Ragnar Ø.; Sudbø, Aasmund; Emstad, Peder Johannes; Helvik, Bjarne Emil; Stol, Norvald. (2003) Stacked Label Optical Burst Switched Networks using Tunable Lasers: Prospects, Viability and Architectures. 7th IFIP Working Conference on Optical Network Design & Modelling (ONDM 2003) , Budapest, Hungary 2003-02-05 -
Academic lecture

Aagesen, Finn Arve; Helvik, Bjarne Emil; Chutiporn, Anutariya; Shiaa, Mazen Malek. (2003) On Adaptable Networking. The 2003 International Conference on Information and Communication Technologies (ICT 2003) , Bangkok, Thailand 2003-04-10 -
Academic lecture

Wittner, Otto; Heegaard, Poul Einar; Helvik, Bjarne Emil. (2003) Scalable Distributed Discovery of Resource Paths in Telecommunication Networks using Cooperative Ant-like Agents. Congress on Evolutionary Computation (CEC2003) , Canberra, Australia. 2003-12-12 -
Academic lecture

Aagesen, Finn Arve; Helvik, Bjarne Emil; Anutariya, Chutiporn. (2003) On Adaptable Networking. The First International Conference on Information and Communication Technologies, ICT'2003 2003-04-01 - 2003-04-03
Academic lecture

Zouganeli, Evi; Andreassen, Ragnar; Sudbø, Aasmund Sveinung; Peder, Emstad; Helvik, Bjarne; Stol, Norvald. (2003) Stacked Label Optical Burst Switched Networks using Tunable Lasers: Prospects, Viability and Architectures. Conference on Optical Network Design and Modelling (ONDM 2003 , Budapest 2003-02-03 - 2003-02-03
Academic lecture

Zouganeli, Evi; Andreassen, Ragnar; Haugen, Rolf B; Solem, Astrid; Feng, Boning; Sudbø, Aasmund Sveinung. (2003) Performance evaluation of a mesh optical burst switched network with tunable lasers and tunable wavelength converters. 7th Conference on Telecommunication (ConTEL) , Zagreb 2003-06-11 - 2004-06-13
Academic lecture

Andreassen, Ragnar Ø.; Stol, Norvald; Zouganeli, Evi; Haugen, Rolf B.; Helvik, Bjarne Emil; Emstad, Peder Johannes. (2003) Application Dependent Performance of a Mesh Optical Burst Switched Network and Effect of Burst Size. ECOC 2003 , Rimini 2003-09-21 - 2003-09-25
Academic lecture

Zouganeli, Evi; Andreassen, Ragnar Ø.; Sudbø, Aasmund; Emstad, Peder Johannes; Helvik, Bjarne Emil; Stol, Norvald. (2003) Stacked Label Optical Burst Switched Networks using Tunable Lasers: Prospects, Viability and Architectures. The 7th IFIP Working Conference on Optical Network Design & Modelling (ONDM 2003) , Budapest 2003-02-03 - 2003-02-05
Academic lecture

Zouganeli, Evi; Andreassen, Ragnar Ø.; Haugen, Rolf B.; Solem, Astrid; Feng, Boning; Sudbø, Aasmund. (2003) Performance evaluation of a meshed optical burst switched network with tunable lasers and tunable wavelength converters. 7th International Conference on Telecommunications , Zabreb 2003-06-11 - 2003-06-13
Academic lecture

Wittner, Otto; Heegaard, Poul Einar; Helvik, Bjarne Emil. (2003) Scalable Distributed Discovery of Resource Paths in Telecommunication Networks using Cooperative Ant-like Agents. 2003 IEEE Congress on Evolutionary Computation [CEC2003] , Canberra 2003-12-08 - 2003-12-12

2002

Academic lecture

Wittner, Otto; Helvik, Bjarne Emil. (2002) Robust Implementation of Policies Using Ant-like Agents. The Network Control and Engineering for QoS, Security and Mobility with focus on Policy-based Networking IFIP and IEEE Conference, Net-Con'2002 , Paris, France 2002-10-25 -
Academic lecture

Wittner, Otto; Helvik, Bjarne Emil. (2002) Cross-Entropy Guided Ant-like Agents Finding Cyclic Paths in Scarcely Meshed Networks. Third International Workshop on Ant Algorithms, ANTS'2002 , Brussels, Belgium 2002-09-14 -
Academic lecture

Wittner, Otto; Helvik, Bjarne Emil. (2002) Cross Entropy Guided Ant-like Agents Finding Dependable Primary/Backup Path Patterns in Networks. Congress on Evolutionary Computation (CEC2002) , Honolulu, Hawaii, US 2002-05-17 -
Academic lecture

Aagesen, Finn Arve; Chutiporn, Anutariya; Shiaa, Mazen Malek; Helvik, Bjarne Emil. (2002) Support Specification and Selection in TAPAS. EUNICE'2002 , Trondheim, Norway 2002-09-04 -
Poster

Aagesen, Finn Arve; Helvik, Bjarne Emil; Anutariya, Chutiporn. (2002) Towards Dynamic Composition of Adaptive Systems. Euroweb 2002 Conference: The Web and the GRID: From E-Science to E-Business , Oxford, England 2002-12-15 -

2001

Academic lecture

Helvik, Bjarne Emil; Wittner, Otto. (2001) Using the Cross-Entropy Method to Guide/Govern Mobile Agent's Path Finding in Networks. 3rd International Workshop on Mobile Agents for Telecommunication Applications - MATA'01 , Montréal, Canada 2001-08-16 -
Academic lecture

Aagesen, Finn Arve; Helvik, Bjarne Emil; Johansen, Ulrik Albert; Meling, Hein. (2001) Plug and Play for Telecommunication Functionality - Architecture and Demonstration Issues. IConIT'2001 - The 2001 International Conference on Information Technology for the New Millenium , Bangkok, Thailand 2001-05-30 -
Academic lecture

Meling, Hein; Helvik, Bjarne Emil. (2001) ARM: Autonomous Replication Management in Jgroup. 4th European Research Seminar on Advances in Distributed Systems (ERSADS) , Bertinoro, 14-18 May 2001

2000

Poster

Wittner, Otto; Helvik, Bjarne Emil. (2000) Simulating mobile agent based network management using network simulator. Second International Symposium on Agent Systems and Applications and Fourth International Symposium on Mobile Agents (ASA/MA 2000) , Zürich
Poster

Wittner, Otto; Helvik, Bjarne Emil; Hölper, C.J.E.. (2000) Failure semantics of mobile agent systems involved in network fault management. 2000 IEEE/IFIP Network Operations and Management Symposium , 10-14. apr 2000, Honolulu, Hawaii, USA

1999

Academic lecture

Heegaard, Poul Einar; Helvik, Bjarne Emil. (1999) On the use of likelihood ratio as indicator of the accuracy of importance sampling estimates. Second International Workshop on Rare Event Simulation (RESIM'99) , Twente, 11.-12. mars 1999
Academic lecture

Aagesen, Finn Arve; Helvik, Bjarne Emil; Meling, Hein; Johansen, Ulrik Albert. (1999) Plug and play for telecommunications - architecture and demonstration issues. Norsk informatikkonferanse '99 (NIK'99) , Trondheim, 16.-17. november 1999 1999-11-10 - 1999-11-17
Academic lecture

Wittner, Otto; Hölper, Carsten; Helvik, Bjarne Emil. (1999) Failure semantics of mobile agent systems involved in network fault management. Norsk Informatikkonferanse '99 (NIK'99) , Trondheim, 16.-17. november 1999
Academic lecture

Aagesen, Finn Arve; Helvik, Bjarne Emil; Wuwongse, Vilas; Meling, Hein; Bræk, Rolv; Johansen, Ulrik Albert. (1999) Towards a plug and play architecture for telecommunications. IFIP TC6 WG6.7 Fifth International Conference on Intelligence in Networks (SMARTNET '99) , Pathumthani, Thailand, 22.-26. november 1999 1999-11-22 - 1999-11-26
Academic lecture

Helvik, Bjarne Emil. (1999) Dependability issues in smart networks. IFIP TC6 WG6.7 Fifth International Conference on Intelligence in Networks (SMARTNET '99) , Pathumthani, Thailand, 22.-26. november 1999

1998

Academic lecture

Heegaard, Poul E.; Helvik, Bjarne Emil; Stol, Norvald. (1998) Genetic Algorithms for Dimensioning of Full Service Access Networks. Fourteenth Nordic Teletraffic Seminar (NTS 14) , Lyngby, Demark

1996

Lecture

Helvik, Bjarne Emil. (1996) Laboratory masurements of ATM traffic handling. Norsk teleforum , Loen
Lecture

Helvik, Bjarne Emil. (1996) Risikofaktorer ved den teknologiske utvikling innen informasjons og kommunikasjons teknologi. Seminar "Informasjonsteknologi og sårbarhet" , Trondheim
Academic lecture

Helvik, Bjarne Emil; Stol, Norvald. (1996) QoS differentiation in ATM networks : a case study. , Trondheim

Språkvelger

Bjarne Emil Helvik

Bjarne Emil Helvik

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