Background and activities

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 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,
  • Fault-tolerant systems,
  • Combined security and dependability evaluation, probabilistic approaches in security,
  • Architecture of ICT systems (Emphasis on dependability issues)
  • QoS in communication network and services.

Current research focus is 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.)

Scientific, academic and artistic work

Displaying a selection of activities. See all publications in the database

2021

2020

2019

2018

2017

2016

2015

  • Gonzalez, Andres J.; Helvik, Bjarne Emil; Tiwari, Prakriti; Becker, Denis; Wittner, Otto J.. (2015) GEARSHIFT: Guaranteeing availability requirements in SLAs using hybrid fault tolerance. 2015 IEEE Conference on Computer Communications (INFOCOM).
  • 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. 2015 IEEE Global Communications Conference (GLOBECOM).
  • Heegaard, Poul Einar; Helvik, Bjarne Emil; Mendiratta, Veena. (2015) Achieving Dependability in Software-Defined Networking - A Perspective. 7th International Workshop on Reliable Networks Design and Modeling (RNDM 2015).
  • Heegaard, Poul Einar; Helvik, Bjarne Emil; Trivedi, Kishor; Machida, Fumio. (2015) Survivability as a Generalization of Recovery. Proceedings of the 2015 11th International Conference on The Design of Reliable Communication Networks (DRCN).
  • 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] . IFIP TC6, IEEE Com. Soc. and more; Münich. 2015-10-05 - 2015-10-05.

2014

2013

  • Cholda, Piotr; Helvik, Bjarne Emil. (2013) Reliable Network-Based Services. Computer Communications. vol. 36 (6).
  • 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.
  • 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 on the.
  • 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.
  • 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 on the.
  • Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2013) Hybrid cloud management to comply efficiently with SLA availability guarantees. 12th Annual IEEE International Symposium on Network Computing and Applications, NCA 2013.
  • Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2013) SLA success probability assessment in networks with correlated failures. Computer Communications. vol. 36 (6).
  • Myakotnykh, Eugene; Wittner, Otto; Helvik, Bjarne Emil; Abdelkefi, Atef; Helland, Jon Kåre; Kvittem, Olav Arne; Skjesol, Trond; Øslebø, Arne. (2013) An Analysis of Interdomain Availability and Causes of Failures Based on Active Measurements. Telecommunications Systems. vol. 52 (2).

2012

  • Cholda, Piotr; Følstad, Eirik Larsen; Helvik, Bjarne Emil; Kuusela, Pirkko; Naldi, Maurizio; Norros, Ilkka. (2012) Towards risk-aware communications networking. Reliability Engineering & System Safety. vol. 109.
  • Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2012) Finnes det garanti mot nedetid i dag og i fremtiden?. Digitale telenett - Teleforum på Kursdagene . Tekna; Trondheim. 2012-01-05 - 2012-01-06.
  • Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2012) A Study of the Interval Availability and its Impact on SLAs Risk. Advances in Computer Science, Engineering & Applications.
  • 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). vol. 2 (1).
  • Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2012) Guaranteeing SLA Availability in Telecommunications Networks. International Telecommunications Network Strategy and Planning Symposium.
  • Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2012) System Management to Comply with SLA Availability Guarantees in Cloud Computing. IEEE International Conference on Cloud Computing Technology and Science (IEEE CloudCom 2012).
  • Paquereau, Laurent; Helvik, Bjarne Emil. (2012) Ant-based systems for wireless networks : retrospect and prospects. Self-organizing systems : 6th International Workshop IWSOS 2012.
  • 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.
  • Zhang, Peiqing; Helvik, Bjarne Emil. (2012) Modeling Push-Based Live P2P Streaming by Stochastic Activity Networks. Communications in Computer and Information Science. vol. 294.
  • Zhang, Peiqing; Helvik, Bjarne Emil. (2012) Modeling Push-Based Live P2P Streaming by Stochastic Activity Networks. Journal of Digital Information Management. vol. 10 (4).
  • 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.
  • Zhang, Peiqing; Helvik, Bjarne Emil. (2012) Towards green P2P: Analysis of energy consumption in P2P and approaches to control. Proceedings of the 2012 International Conference on High Performance Computing and Simulation.

2011

  • Cholda, Piotr; Helvik, Bjarne Emil. (2011) Proceedings of the 2011 8th International Workshop on the Design of Reliable Communication Networks. IEEE Press. 2011. ISBN 978-1-61284-125-0.
  • Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2011) Dependability in mobile access networks. Workshop on Traffic Engineering and Dependability in the Network of the Future . NTNU/Q2S; Trondheim. 2011-06-21 - 2011-06-22.
  • 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.
  • Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2011) Failures and changes in cellular access networks; A study of field data. Proceedings of the 2011 8th International Workshop on the Design of Reliable Communication Networks.
  • 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.
  • 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.
  • Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2011) Guaranteeing Service Availability in SLAs on Networks with Non Independent Failures. Proceedings of the 2011 8th International Workshop on the Design of Reliable Communication Networks.
  • 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 . NTNU; Trondheum. 2011-06-20 - 2011-06-21.
  • Ma, Huaiyuan; Helvik, Bjarne Emil; Wittner, Otto. (2011) An Impact of Addressing Schemes on Routing Scalability. Journal of Communications and Networks. vol. 13 (6).
  • Paquereau, Laurent; Helvik, Bjarne Emil. (2011) Ant-Based Multipath Routing for Wireless Mesh Networks. Lecture Notes in Computer Science (LNCS). vol. 6625.
  • 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. vol. 8 (4).
  • 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]; . IEEE Communication Society; Las Vegas, NV. 2011-01-08 - 2011-01-11.
  • Zhang, Peiqing; Helvik, Bjarne Emil. (2011) Modeling and analysis of P2P content distribution under coordinated attack strategies. Proceedings of Eighth Annual IEEE Consumer Communications and Networking Conference.

2010

  • Ma, Huaiyuan; Helvik, Bjarne Emil; Wittner, Otto. (2010) The Stability of Compact Routing in Dynamic Inter-Domain Networks. 2010 Third International Conference on Communication Theory, Reliability, and Quality of Service.
  • 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.
  • Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2010) Determining dependencies in multi technology inter domain wireless access; A case study. GLOBECOM Workshops (GC Wkshps), 2010 IEEE.
  • 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. . Globecom; Miami. 2010-12-10 - 2010-12-10.
  • 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.
  • 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.
  • Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2010) Dynamic Sharing Mechanism for Guaranteed Availability in MPLS Based Networks. International Workshop Technical Committee on Communications Quality and Reliability, CQR 2010.
  • Gonzalez, Andres Javier; Helvik, Bjarne Emil; Hellan, Jon K.; Kuusela, Pirkko. (2010) Analysis of Dependencies Between Failures in the UNINETT IP Backbone Network. IEEE Pacific Rim International Symposium on Dependable Computing, PRDC 2010.
  • 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. vol. 8 (4).
  • 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.
  • 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 . Euro-NF; Warsaw. 2010-04-15 - 2010-04-16.
  • Myakotnykh, Evgeniy; Helvik, Bjarne Emil; Hellan, Jon Kåre; Kvittem, Olav Arne; Skjesol, Trond; Wittner, Otto; Øslebø, Arne. (2010) Analyzing Causes of Failures in the Global Research Network Using Active Measurements. Proceedings of the Second International Workshop on Reliable Networks Design and Modeling (RNDM 2010).
  • Myakotnykh, Evgeniy; Helvik, Bjarne Emil; Wittner, Otto; Kvittem, Olav; Helland, Jon Kåre; Skjesol, Trond; Øslebø, Arne. (2010) Measurement and Analysis of End-to-end Dependability Characteristics in the Global Network. 18th International Workshop on Quality of Service (IWQoS), 2010.
  • 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. vol. 39.
  • Paquereau, Laurent; Helvik, Bjarne Emil. (2010) Opportunistic Ant-Based Path Management for Wireless Mesh Networks. Lecture Notes in Computer Science (LNCS). vol. 6234.
  • 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.
  • Zhang, Peiqing; Helvik, Bjarne Emil. (2010) Modeling QoS in P2P File-sharing with Benign and Malicious Peers by Stochastic Activity Networks. 2010 7th IEEE Consumer Communications and Networking Conference.
  • 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.
  • Zhang, Peiqing; Helvik, Bjarne Emil. (2010) Towards Green P2P: Understanding the Energy Consumption in P2P under Content Pollution. Proceedings of 2010 IEEE/ACM International Conference on Green Computing and Communications (GreenCom 2010).

2009

  • Ma, Huaiyuan; Helvik, Bjarne Emil; Wittner, Otto. (2009) A compact routing scheme with lower stretch. Proc International Conference on New Technologies, Mobility and Security.
  • Ma, Huaiyuan; Wittner, Otto; Helvik, Bjarne Emil. (2009) A Stochastic Clustering Algorithm for Swarm Compact Routing. Proc. of 2009 Next Generation Internet Networks.
  • Cholda, Piotr; Mykkeltveit, Anders; Helvik, Bjarne Emil; Jajszczyk, Andrzej. (2009) Continuity-based resilient communication. Proceedings of the 2009 7th International Workshop on the Design of Reliable Communication Networks.
  • 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.
  • Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2009) Managing availability in wireless inter domain access. Proceedings of the International Conference on Ultra Modern Telecommunications.
  • Gonzalez, Martinez Andres; Helvik, Bjarne Emil. (2009) Guaranteeing Service Availability in SLAs; A Study of the Risk Associated with Contract Period and Failure Process. 2009 IEEE LATIN-AMERICAN CONFERENCE ON COMMUNICATIONS.
  • Hachana, Safaà; Montavont, Nicolas; Paquereau, Laurent; Helvik, Bjarne Emil. (2009) Exploiting Alternative Paths in MHWNs: A Source-Based QoS Routing Approach. Proceedings of the INFOCOM Workshops 2009, IEEE.
  • Helvik, Bjarne Emil. (2009) Differentiated dependability in one network?. NTVA Technology Forum 2009 . NTVA - Norges Tekniske Vitenskapsakademi; Trondheim. 2009-09-09 - 2009-09-09.
  • 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.
  • 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. Trust Management III.
  • 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.
  • Myakotnykh, Eugene; Helvik, Bjarne Emil. (2009) Analysis of Evolution Scenarios for End-to-end Quality of Services Provisioning in the Internet. Proceedings of the International Conference on Ultra Modern Telecommunications.
  • Mykkeltveit, Anders; Helvik, Bjarne Emil. (2009) Adaptive management of connections to meet availability guarantees in SLAs. IM 2009 Mini-conference . IEEE/IFIP; Hofstra University, Long Island, New York. 2009-06-01 - 2009-06-05.
  • Mykkeltveit, Anders; Helvik, Bjarne Emil. (2009) Adaptive management of connections to meet availability guarantees in SLAs. Proceedings of the 2009 IFIP/IEEE International Symposium on Integrated Network Management.
  • Paquereau, Laurent; Helvik, Bjarne Emil. (2009) Ensuring Fast Adaptation in an Ant-Based Path Management System. Proceedings CD of the 4th International ICST Conference on Bio-Inspired Models of Network, Information, and Computing Systems.
  • Paquereau, Laurent; Helvik, Bjarne Emil. (2009) Revisiting the Auto-Regressive Functions of the Cross-Entropy Ant System. Lecture Notes in Computer Science (LNCS).
  • 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.
  • 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, China, 12-14 December 2009.

2008

  • Grosan, Crina; Abraham, Ajith; Helvik, Bjarne Emil. (2008) Building Multiobjective Resilient Networks. Proceedings of UKSim - Tenth International Conference, University of Cambridge, UK.
  • Heegaard, Poul Einar; Helvik, Bjarne Emil; Wittner, Otto Jonassen. (2008) The Cross Entropy Ant System for Network Path Management. Telektronikk. vol. 104 (1).
  • Meling, Hein; Montresor, Alberto; Helvik, Bjarne E.; Babaoglu, Ozalp. (2008) Jgroup/ARM: a distributed object group platform with autonomous replication management. Software, Practice & Experience. vol. 38 (9).
  • Moe, Marie Elisabeth Gaup; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2008) TSR: trust-based secure MANET routing using HMMs. Proceedings of the 4th ACM symposium on QoS and security for wireless and mobile networks.
  • Mykkeltveit, Anders; Helvik, Bjarne Emil. (2008) Application of the RESTART/Splitting technique to network resilience studies in NS2. Proceedings of the 19th IASTED International Conference on Modelling & Simulation.
  • 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) . IARIA; Cancun. 2008-04-13 - 2008-04-18.
  • Mykkeltveit, Anders; Helvik, Bjarne Emil. (2008) On Provision of Availability Guarantees Using Shared Protection. 12th Conference on Optical Network Design and Modelling (ONDM) . IFIP; Vilanova la Geltru. 2008-03-12 - 2008-03-14.
  • Paquereau, Laurent; Helvik, Bjarne Emil. (2008) Simulation of Wireless Multi-* Networks in NS-2. Proceedings of the 3rd International Conference on Performance Evaluation Methodologies and Tools (ValueTools 2008).
  • Meling, H; Montresor, A; Helvik, Bjarne Emil; Babaoglu, O. (2008) Jgroup/ARM: a distributed object group platform with autonomous replication management. Software, Practice & Experience. vol. 38.

2007

  • 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. vol. 9 (4).
  • Emstad, Peder Johannes; Heegaard, Poul Einar; Helvik, Bjarne Emil; Paquereau, Laurent. (2007) Dependability and performance with discrete event simulation. Tapir Akademisk Forlag. 2007.
  • Emstad, Peder Johannes; Helvik, Bjarne Emil; Kure, Øivind. (2007) 3rd EuroNGI Conference on Next Generation Internet Networks, Design and Engineering for Heterogeneity. IEEE conference proceedings. 2007. ISBN 1-4244-0856-3.
  • 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.
  • Helvik, Bjarne Emil; Sallhammar, Karin; Knapskog, Svein Johan. (2007) Integrated Dependability and Security Evaluation Using Game Theory and Markov Models. Information Assurance : Dependability and Security in Networked Systems.
  • Mykkeltveit, Anders; Helvik, Bjarne Emil. (2007) On provision of guaranteed availability using dedicated protection. EuroFGI Workshop on Traffic Engineering, Protection and Restoration for FGI . EuroFGI / Telenor; Fornebu/Oslo. 2007-09-27 - 2007-10-27.
  • 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.
  • 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. vol. 7 (3).

2006

  • Li, Frank Y.; Stol, Norvald; Helvik, Bjarne E.. (2006) Conformance Deterioration in QoS Networks: Phenomenon, Analysis and Elimination. Computer Networks. vol. 50 (12).
  • Gan, Qitao; Helvik, Bjarne Emil. (2006) Dependability Modelling and Analysis of Networks as Taking Routing and Traffic into Account. Proceedings of EuroNGI 2nd Conference on Next Generation Internet Design and Engineering on CD-ROM.
  • 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.
  • 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.
  • Helvik, Bjarne Emil. (2006) Swarm-based routing to achieve dependable networks. Dependability of all-IP networks; A multi-disciplinary workshop . VTT; Espoo (Helsinki). 2006-05-18 - 2006-05-19.
  • Li, Frank; Stol, Norvald; Helvik, Bjarne Emil. (2006) Conformance deterioration in QoS networks: Phenomenon, analysis and elimination. Computer Networks. vol. 50 (12).
  • Mykkeltveit, Anders; Helvik, Bjarne Emil. (2006) Application of the RESTART/Splitting Technique in Object-Oriented Simulation. 6th International Workshop on Rare Event Simulation . University of Bamberg; Bamberg. 2006-10-08 - 2006-10-10.
  • Mykkeltveit, Anders; Helvik, Bjarne Emil. (2006) Prospects for dependability differentiation in interdomain networks. EuroNGI Workshop on Traffic Engineering, Protection and Restoration for NGI . EuroNGI/AGH University of Science and Technology; Krakow. 2006-05-04 - 2006-05-05.
  • Paquereau, Laurent; Helvik, Bjarne Emil. (2006) A Module-Based Wireless Node for ns-2. Proceedings of the Workshop on ns-2: the IP network simulator.
  • 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.
  • Sallhammar, Karin; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2006) On Stochastic Modeling for Integrated Security and Dependability Evaluation. Journal of Networks. vol. 1 (5).
  • Sallhammar, Karin; Helvik, Bjarne Emil; Knapskog, Svein Johan. (2006) Towards a Stochastic Model for Integrated Security and Dependability Evaluation. Proceedings of the First International Conference on Availability, Reliability and Security.
  • Zouganeli, Evi, Paraskevi; Andreassen, Ragnar; Feng, Boning; Solem, Astrid; Stol, Norvald; Sudbø, Aasmund Sveinung; Kjønsberg, Heidi; Helvik, Bjarne; Bjørnstad, Steinar; Haugen, Rolf B. (2006) Optical packets or electrical packets? An assessment of the viability of optical packet/burst switching. Northern Optics 2006 . Norsk Fysisk Selskap; Radisson SAS Hotel Norge, Bergen. 2006-06-14 - 2006-06-16.

2005

  • Andreassen, Ragnar; Sudbø, Aasmund Sveinung; Bjørnstad, Steinar; Helvik, Bjarne; Hodne, E; Wikshåland, S; Zouganeli, Evi. (2005) Fault tolerance in a TWC/AWG based optical burst switching node architecture. 5th International Workshop on Design of Reliable Communication Networks (DRCN2005) . Telecom Lab Italia; Napoli. 2005-10-16 - 2005-10-19.
  • Andreassen, Ragnar; Sudbø, Aasmund; Bjørnstad, Steinar; Helvik, Bjarne Emil; Hodne, Erik; Wikshaaland, Sigbjørn; Zouganeli, Evi. (2005) Fault tolerance in a TWC/AWG based optical burst switching node architecture. Proceedings of The 5th International Workshop on Design of Reliable Communication Networks (DRCN'5).
  • Bjørnstad, Steinar; Sudbø, Aasmund; Andreassen, Ragnar; Zouganelli, Evi; Stol, Norvald; Helvik, Bjarne Emil. (2005) Node redundancy in optical burst and packet switched networks. Proceedings of the 7th International Conference on Transparent Optical networks (ICTON) in Barcelona, Vol. 1.
  • 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 . UiO, Simula Research Laboratory; Fornebu. 2005-10-27 - 2005-10-28.
  • Heegaard, Poul Einar; Helvik, Bjarne Emil; Andreassen, Ragnar. (2005) Application of Rare Event Techniques to Trace Driven Simulation. Winter Simulation Conference 2005 . WSC Foundation INFORMS/IEEE/ACM; Orlando. 2005-12-04 - 2005-12-07.
  • Heegaard, Poul Einar; Helvik, Bjarne Emil; Andreassen, Ragnar. (2005) Application of Rare Event Techniques to Trace Driven Simulation. Proceedings of the 2005 Winter Simulation Conference.
  • Heegaard, Poul Einar; Wittner, Otto; Helvik, Bjarne Emil. (2005) Self-managed virtual path management in dynamic networks. Lecture Notes in Computer Science (LNCS).
  • 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). vol. 3463.
  • 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.
  • 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.
  • 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.
  • 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.
  • Sallhammar, Karin; Knapskog, Svein Johan; Helvik, Bjarne Emil. (2005) Building a Stochastic Model for Security and Trust Assessment Evaluation. ERCIM News.
  • 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.
  • Sallhammar, Karin; Knapskog, Svein Johan; Helvik, Bjarne Emil. (2005) Using Stochastic Game Theory to Compute the Expected Behavior of Attackers. 2005 Symposium on Applications and the Internet - SAINT 2005.
  • 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.
  • Wittner, Otto; Helvik, Bjarne Emil; Nicola, Victor Fouad. (2005) Internet Failure Protection using Hamiltonian p-Cycles found by Ant-like Agents. Proceedings of The 5th International Workshop on Design of Reliable Communication Networks (DRCN'5).
  • Zouganeli, Evi; Andreassen, Ragnar; Feng, Boning; Stol, Norvald; Solem, Astrid; Helvik, Bjarne Emil; Sudbø, Aasmund; Haugen, Rolf B.. (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.
  • Zouganeli, Evi; Andreassen, Ragnar; Feng, Boning; Stol, Norvald; Solem, Astrid; Helvik, Bjarne; Sudbø, Aasmund Sveinung; Haugen, Rolf B. (2005) Optical packets, circuits, or packets and circuits: Viability of optical packet/burst switching. Opto-electronics and Communications Conference (OECC 2005) . Optical Society of Korea; Seoul. 2005-07-04 - 2005-07-08.
  • Zouganeli, Evi; Solheim, Astrid; Kjølnesberg, Heidi; Andreassen, Ragnar; Feng, Boning; Stol, Norvald; Sudbø, Aasmund; Helvik, Bjarne Emil. (2005) Techno-Economic Evaluation of Optical Packet/Burst Switching. IEE Conferance publication.
  • 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.
  • 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. IEEE Catalog Number: 05EX1006C.
  • 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) . Politecnico di Milano; Milano. 2005-02-07 - 2005-02-09.
  • Andreassen, Ragnar; Sudbø, Aasmund; Bjørnstad, Steinar; Helvik, Bjarne Emil; Hodne, Erik; Wikshaaland, Sigbjørn; Zouganeli, Evi. (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.
  • 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.
  • Heegaard, Poul Einar; Wittner, Otto; Helvik, Bjarne Emil. (2005) Self-management of virtual paths in dynamic networks. Lecture Notes in Computer Science (LNCS). vol. 3460.
  • 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). vol. 3463.
  • Zouganeli, Evi; Andreassen, Ragnar Ø; Feng, Boning; Solem, Astrid; Stol, Norvald; Kjønsberg, Heidi; Sudbø, Aasmund; Helvik, Bjarne E.; Haugen, Rolf. (2005) Why bother with optical packets? An evaluation of the viability of optical packet/burst switching. Telektronikk. vol. 101 (2).
  • Zouganeli, Evi; Andreassen, Ragnar; Feng, Boning; Solem, Astrid; Stol, Norvald; Kjønsberg, Heidi; Sudbø, Aasmund Sveinung; Helvik, Bjarne; Haugen, Rolf B. (2005) Why bother with optical packets? An evaluation of the viability of optical packet/burst switching. Telektronikk. vol. 101 (2).
  • Zouganeli, Evi; Andreassen, Ragnar; Feng, Boning; Solem, Astrid; Stol, Norvald; Sudbø, Aasmund Sveinung; Kjønsberg, Heidi; Bjørnstad, Steinar; Helvik, Bjarne; Haugen, Rolf B. (2005) Results from IST STOLAS: Optical packet/ burst switched networks using tunable lasers – design, architectures and attainable performance. Norwegian Network Research Seminar (NNRS2005) . Uninett; Fornebu. 2005-10-27 - 2005-10-28.
  • Zouganeli, Evi; Solem, Astrid; Kjønsberg, Heidi; Andreassen, Ragnar; Feng, Boning; Stol, Norvald; Sudbø, Aasmund Sveinung; Helvik, Bjarne; Haugen, Rolf B. (2005) Techno-Economic Evaluation of Optical Packet/ Burst Switching. European Conference on Optical Communication (ECOC 2005) . IEE; Glasgow. 2005-09-25 - 2005-09-29.
  • Zouganeli, Evi; Solheim, Astrid; Kjønsberg, Heidi; Andreassen, Ragnar; Feng, Boning; Stol, Norvald; Sudbø, Aasmund; Helvik, Bjarne Emil. (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

  • 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 . IEEE/IFIP; Seoul. 2004-04-01 - 2004-04-03.
  • 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) . IFIP; Ghent. 2004-04-02 - 2004-04-04.
  • Andreassen, Ragnar; Stol, Norvald; Zouganeli, Evi; Haugen, Rolf B; Helvik, Bjarne; Emstad, Peder; Sudbø, Aasmund Sveinung; Solem, Astrid; Feng, Boning. (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) . AEI, IIC, Telecom Italia; Rimini. 2004-09-21 - 2004-09-25.
  • Feng, Boning; Stol, Norvald; Zouganeli, Evi; Andreassen, Ragnar; Solem, Astrid; Haugen, Rolf B; Sudbø, Aasmund Sveinung; Helvik, Bjarne. (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.
  • 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 . University of Budapest; Budapest. 2004-09-07 - 2004-09-08.
  • Helvik, Bjarne E.; Meling, Hein; Montresor, Alberto. (2004) An Approach to Experimentally Obtain Service Dependability Characteristics of the Jgroup/ARM System. 2004. ISBN 8276442374.
  • Helvik, Bjarne Emil. (2004) Perspectives on the Dependability of Networks and Services. Telektronikk.
  • 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.
  • 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.
  • 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) . IEEE; Phoenix, Arizona. 2004-04-01 - 2004-04-03.
  • Wittner, Otto; Helvik, Bjarne Emil. (2004) Distributed Soft Policy Enforcement by Swarm Intelligence; Application to Loadsharing and Protection. Annales des télécommunications. vol. 59 (1/2).
  • 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 University; Lund. 2004-05-27 - 2004-05-28.
  • Zouganeli, Evi; Stol, Norvald; Andreassen, Ragnar; Feng, Boning; Solem, Astrid; Haugen, Rolf B; Sudbø, Aasmund Sveinung; Helvik, Bjarne. (2004) Optical packet/burst switched networks using tunable lasers: Architectures, Migration and Viability. Norwegian Electrooptics Meeting . Optikk- og akustikkgruppa i Norsk Fysisk Selskap; Tønsberg. 2004-05-02 - 2004-05-04.
  • Feng, Boning; Stol, Norvald; Zouganeli, Evi; Andreassen, Ragnar Ø.; Solem, Astrid; Haugen, Rolf B.; Sudbø, Aasmund; Helvik, Bjarne Emil. (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.