Bjarne Emil Helvik

Professor

Department of Information Security and Communication Technology Faculty of Information Technology and Electrical Engineering

bjarne@ntnu.no +47 73592667

Elektro B, B-215, Gløshaugen, O. S. Bragstads plass 2b

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 - .......: Professor, Department of Information Security and Communication Technology, NTNU
2020 - .......: WP leader/PI, Centre for Research based Innovation – Norwegian Center for Cybersecurity in Critical Sectors (NORCICS)

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

2019

Gebraselase, Befekadu Gezaheng; Helvik, Bjarne Emil; Jiang, Yuming. (2019) Suitability of Blockchains to Enable and Support Networking Functions: State of Art. CCIOT 2019: Proceedings of the 2019 4th International Conference on Cloud Computing and Internet of Things.
Helvik, Bjarne Emil. (2019) Challenges with 5G Networks as a Base for Critical Infrastucture. Mobil Agenda; fagseminar: 5G sikkerhet . Mobil Agenda; Simula Research Laboratory, Oslo - Fornebu. 2019-06-13 - 2019-06-13.
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.
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. vol. 16 (4).
Tola, Besmir; Nencioni, Gianfranco; Helvik, Bjarne Emil; Jiang, Yuming. (2019) Modeling and Evaluating NFV-Enabled Network Services under Different Availability Modes. 2019 15th International Conference on the Design of Reliable Communication Networks (DRCN), 19-21 March 2019 in Coimbra, Portugal.
Zerihun, Tesfaye Amare; Garau, Michele; Helvik, Bjarne Emil. (2019) Dependability Modeling and Analysis of 5G Based Monitoring System in Distribution Grids. VALUETOOLS 2019 : Proceedings of the 12th EAI International Conference on Performance Evaluation Methodologies and Tools.
Zerihun, Tesfaye Amare; Helvik, Bjarne Emil. (2019) Dependability of Smart Distribution Grid Protection Using 5G. 2019 3rd International Conference on Smart Grid and Smart Cities (ICSGSC).

2018

Esposito, Christian; Gouglidis, Antonios; Hutchison, David; Gurtov, Andrei; Helvik, Bjarne Emil; Heegaard, Poul Einar; Rizzo, Gianluca; Rak, Jacek. (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.
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. vol. 20 (4).
Heegaard, Poul Einar; Helvik, Bjarne Emil; Rak, Jacek. (2018) Proceedings 10th International Workshop on Resilient Networks Design and Modeling (RNDM). IEEE Press. 2018. ISBN 978-1-5386-7030-9. International Workshop on Resilient Networks Design and Modeling (10).
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. vol. 2018.
Oostenbrink, Jorik; Kuipers, Fernando; Heegaard, Poul Einar; Helvik, Bjarne Emil. (2018) Evaluating Local Disaster Recovery Strategies. Performance Evaluation Review. vol. 46 (2).
Vizarreta, Petra; Trivedi, Kishor; Helvik, Bjarne Emil; Heegaard, Poul Einar; Blenk, Andreas; Kellerer, Wolfgang; Mas Machuca, Carmen. (2018) Assessing the Maturity of SDN Controllers with Software Reliability Growth Models. IEEE Transactions on Network and Service Management. vol. 15 (3).
Zerihun, Tesfaye Amare; Helvik, Bjarne Emil. (2018) Dependability Analysis of Smart Distribution Grid Architectures Considering Various Failure Modes. 2018 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe).
Zerihun, Tesfaye Amare; Helvik, Bjarne Emil; Heegaard, Poul Einar. (2018) A modeling approach for dependability analysis of smart distribution grids. 2018 21st Conference on Innovation in Clouds, Internet and Networks and Workshops (ICIN).

2017

Kamisiński, Andrzej; Helvik, Bjarne Emil; Gonzalez, Andres Javier; Nencioni, Gianfranco. (2017) Assessing the risk of violating SLA dependability requirements in software-defined networks. 2017 IEEE Conference on Network Function Virtualization and Software-Defined Networking (NFV-SDN).
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. vol. 14 (4).
Tola, Besmir; Jiang, Yuming; Helvik, Bjarne Emil. (2017) Failure Process Characteristics of Cloud-Enabled Services. 9th International Workshop on Resilient Netwrorks Design and Modeling.
Vizarreta, Petra; Heegaard, Poul Einar; Helvik, Bjarne Emil; Kellerer, Wolfgang; Mas Machuca, Carmen. (2017) Characterization of Failure Dynamics in SDN Controllers. 9th International Workshop on Resilient Netwrorks Design and Modeling.
Vizarreta, Petra; Trivedi, Kishor; Helvik, Bjarne Emil; Heegaard, Poul Einar; Kellerer, Wolfgang; Mas Machuca, Carmen. (2017) An Empirical Study of Software Reliability in SDN Controllers. Proceedings of the 13th International Conference on Network and Service Management [CNSM 2017].

2016

Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2016) Maximizing the reliability of dual homed, critical services in wireless/cellular networks. Optical Switching and Networkning Journal. vol. 19.
Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2016) The cost for meeting SLA dependability requirements; implications for customers and providers. Reliability Engineering & System Safety. vol. 145.
Gonzalez, Andres Javier; Nencioni, Gianfranco; Helvik, Bjarne Emil; Kamisinski, Andrzej. (2016) A Fault-Tolerant and Consistent SDN Controller. 2016 IEEE Global Communications Conference (GLOBECOM).
Heegaard, Poul Einar; Helvik, Bjarne Emil; Nencioni, Gianfranco; Wäfler, Jonas. (2016) Managed Dependability in Interacting Systems. Principles of Performance and Reliability Modeling and Evaluation Essays in Honor of Kishor Trivedi on his 70th Birthday.
Nencioni, Gianfranco; Helvik, Bjarne Emil; Gonzalez, Andres Javier; Heegaard, Poul Einar; Kamisinski, Andrzej. (2016) Availability Modelling of Software-Defined Backbone Networks. 46th Annual IEEE/IFIP International Conference on Dependable Systems and Networks Workshops.
Nencioni, Gianfranco; Helvik, Bjarne Emil; Gonzalez, Andres Javier; Heegaard, Poul Einar; Kamisinski, Andrzej. (2016) Impact of SDN Controllers Deployment on Network Availability. 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

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. vol. 70.
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.
Følstad, Eirik Larsen; Helvik, Bjarne Emil. (2014) Using genetic algorithms to improve the reliability of dual homed wireless critical services. Proceedings of RNDM 2014 6th International Workshop on Reliable Networks Design and Modeling.
Gonzales, Andres; Helvik, Bjarne Emil. (2014) Robust Telecommunication Services - As vital as water and electricity?. Telenor Research Breakfast Meeting . Telenor Research; Fornebu, Broadcasted to the Telenor Group word-wide. 2014-06-20 - 2014-06-20.
Gonzalez, Andres Javier; Helvik, Bjarne Emil. (2014) The Positive Impact of Failures on Energy Efficient Virtual Machines Consolidation. ICC 2014 - Proceedings of 2014 IEEE International Conference on Communications.
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. vol. 7 (4).

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.