Karl-Johan Grinnemo

Forskning
My research primarily considers transport-level solutions for IP-based applications with soft real-time requirements in both data communication and telecommunication networks. Currently, I am involved in the Knowledge Foundation founded research profile, ”High Quality Networked Services in a Mobile World” (HITS), and the EU HORIZON 2020 project, "The Fifth Generation End-to-End Network, Experimentation, System Integration, and Showcasing.
As part of our research profile, HITS, I am researching scalable and efficient transport-level communication solutions for current and future mobile networks. One of our key objectives is to find ways to optimize the battery consumption of Machine Type Communication (MTC) devices while at the same time assure that transport quality requirements, e.g., latency, are met. Constrained sensor devices often communicate periodically to notify their measurements. Even though individual devices typically create small amounts of data, the large number of communicating devices can be a cause of network congestion. In view of this, we investigate congestion control schemes for MTC devices that work in close cooperation with available energy consumption optimization schemes.
As a third activity, we are as part of HITS studying ways in which MTC could provide real-time control and automation of dynamic processes in various fields, e.g., energy distribution. This activity entails studying transport solutions in 5G suitable for critical MTC applications such as traffic and industrial control, clinical remote monitoring, and, not least, teleprotection of smart grids. For example, in power distribution automation, so-called switchgear interlocking across bays is of paramount importance. Substation wide switchgear interlocking must be performed in a distributed way through the exchange of messages, in the same or similar way as in the IEC-618508, Generic Object Oriented Substation Events (GOOSE) smart grid control model. In this way, static wiring between bay control units can be replaced by the reliable transmission of GOOSE messages.
Finally, as a fourth activity in HITS, we are studying scalable and efficient signaling solutions for the 5G core. Since the 5G core needs to support control signaling from billions of devices, it has to be designed to avoid congestion, offer low latency, and, at the same time, provide a flexible framework that is able to adapt to a variety of different use cases. We consider ways to design an SDN/NFV-based 5G core architecture that meets these requirements. For example, we study ways to efficiently and scalable load balance signaling traffic between base stations and virtualized Mobility Management Entities (vMMEs), key network functions, in a 5G core.
The 5GENESIS project aims to validate 5G Key Performance Indexes (KPIs) for various 5G use cases, in both controlled set-ups and large-scale events. As part of this project, we intend to validate and extend our work in HITS on optimizing the battery consumption of MTC devices in 5G. Moreover, we plan to further our previous work in the EU HORIZON 2020 project, NEAT, on "de-ossifying" the Internet transport-layer interface by conducting live experiment campaigns of the NEAT system in the controlled set-ups of 5GENESIS.
Undervisning
Karlstad University
- Lecturer in undergraduate course "Computer Networking I" (DVAE11), Spring 2019.
- Lecturer in undergraduate course "Degree Project for Master of Science in Engineering, Computer Engineering" (DVAE11), Fall 2018.
- Lecturer in undergraduate course "Computer Engineering Project" (DVAE08), Fall 2018.
- Lecturer in undergraduate course "Operating Systems" (DVGB01), Fall 2018.
- Examiner in undergraduate course "Degree Project for Master of Science in Engineering, Computer Engineering" (DVAE11), Spring 2018.
- Examiner in undergraduate course "Computer Science Bachelor's Project" (DVGC25), Spring 2018.
- Temporary lecturer in undergraduate course "Programming Techniques" (DVGA01), Fall 2017.
- Course responsible for Ph.D. course "Computer Networking Seminar", Fall 2017.
- Examiner in undergraduate course "Computer Science Bachelor's Project" (DVGC25), Spring 2017.
- Course responsible for undergraduate course "Computer Engineering Project" (DVAE08), Fall 2015.
- Assistant in Ph.D. course "Individual Themes", Spring 2014 and Fall 2015.
- Assistant in Ph.D. course "Classic Papers", Fall 2013.
- Lab assistant in undergraduate course "Programming Techniques for Engineers" (DVGA15), Fall 2013.
- Lab assistant in undergraduate course "Software Development and Design" (DVGA09), Spring 2013.
- Lab assistant in undergraduate course "Operating Systems" (DVGB01), Fall 2012 and Fall 2013.
- Lecturer in graduate course "Perspectives in Computer Science" (DVAD07), Fall 2011 - Fall 2015.
- Thesis advisor in undergraduate course "Bachelor's Project" (DVGC25), Fall 2011 - 2013.
- Lecturer in Ph.D. course "Current Advances in Computer Networking", Spring 2011.
- Course responsible for undergraduate course "Distributed Systems and Applications" (DVGC15), Fall 2010 - Fall 2017.
KTH Royal Institute of Technology
- Project assistant in graduate course "Communication System Design" (IK2200), Spring 2010.
- Course responsible for undergraduate course "Networks and Communication" (IK1203), Spring 2010.
- Lecturer and lab assistant in graduate course "Advanced Internetworking" (IK2215), Fall 2009 and Fall 2010.
- Lecturer and lab assistant in graduate course "Internet Security and Privacy" (IK1206), Fall 2009.
Samverkan
- Cooperates with Ericsson AB in the KKS HITS project.
Biografi
I completed my Ph.D. studies in June 2006, and worked half a year as a post doctor at the former Department of Computer Science at Karlstad University. During that time, I continued my research from my Ph.D. studies on telephone signaling over IP and SCTP together with Ericsson Research in Aachen. I was also involved in a cooperative research effort on using SCTP in mobile networks together with Universitat Politècnica de Catalunya (UPC) in Barcelona. In January 2007, my post doctoral position at Karlstad University ended, and I resumed my position as consultant at Tieto in Karlstad. My work at Tieto was in many ways aligned with my research, and covered a broad range of activities including pre-studies, system design, and implementation. For example, I was involved in the implementation of an alarm function in Ericsson’s Connectivity Packet Platform (CPP), and conducted a pre-study together with colleagues from Tieto’s Beijing office on how to build an SCTP traffic offload engine for SCTP in CPP. Moreover, I continued to have a foot in research. As an adjunct researcher, I was actively participating in an on-going research effort between Tieto and Karlstad University. I took part in more or less all research project phases including planning, grant seeking, and execution.
Between the fall of 2009 and the fall of 2010, I was on leave from Tieto in Karlstad and worked as an acting associate professor at the School of Information and Communication Technology at the KTH Royal Institute of Technology. As an associate professor, I initiated a research project, ”Smart Session Management for Multi-homed SCTP” (SCTP Smartswitch), together with Karlstad University and Ericsson Research in Kista. The “SCTP Smartswitch” project aimed at extending the failover/changeover mechanism of SCTP with smart session management so that it would be able to manage everything from real-time applications, such as interactive games, which require fast failovers/changeovers, to roaming mobile terminals which sometimes experience long disconnection periods, i.e., long failover/changeover periods. In the fall of 2010, I acquired a four-year, tenure-track position at Karlstad University, and during the first two years as associate senior lecturer at their computer science department, the ”SCTP SmartSwitch” project was a major part of my research work. Notably, it resulted in about ten publications, an SCTP-based mobility management framework for smartphones and tablets that offered sub-second vertical handover between 3G and WiFi networks, and a generic SCTP-based session layer for mobility support in mobile delay-tolerant networks.
I became a Senior Lecturer at Karlstad University in the Fall of 2014 and an Associate Professor (swe. Docent) in the Fall 2016. In recent years, my research has to a large degree focused on the use of multi-path transport protocols such as Multipath TCP and CMT-SCTP to increase reliability and throughput and decrease latency in IP networks. I have also, as part of the HITS project, initiated studies on energy-efficient transport solutions for Cellular IoT technologies such as NB-IoT. I have authored and co-authored around fifty conference and journal papers, and is a Senior member of IEEE.
Publikationer
- Habtegebreil Kassaye Haile, Karl-Johan Grinnemo, Simone Ferlin, Per Hurtig, Anna Brunström, 2021
- Pehr Söderman, Karl-Johan Grinnemo, Markus Hidell, Peter Sjödin, 2020
- Van-Giang Nguyen, Karl-Johan Grinnemo, Javid Taheri, Anna Brunström, 2020
- Van-Giang Nguyen, Karl-Johan Grinnemo, Javid Taheri, Anna Brunström, 2020
- Muhammad Tahir Abbas, Johan Eklund, Karl-Johan Grinnemo, Anna Brunström, Stefan Alfredsson, Özgü Alay, Sándor Katona, Gergely Seres, Bela Rathonyi, 2020
- Van-Giang Nguyen, Karl-Johan Grinnemo, Jun Cheng, Javid Taheri, Anna Brunström, 2020
- Alexander Rabitsch, Karl-Johan Grinnemo, Anna Brunström, Henrik Abrahamsson, Fehmi Ben Abdesslem, Stefan Alfredsson, Bengt Ahlgren, 2020
- Dejene Boru Oljira, Karl-Johan Grinnemo, Anna Brunström, Javid Taheri, 2020
- Muhammad Tahir Abbas, Johan Eklund, Karl-Johan Grinnemo, Anna Brunström, 2019
- Bengt Ahlgren, Karl-Johan Grinnemo, Henrik Arahamsson, Anna Brunström, Per Hurtig, 2019
- Per Hurtig, Karl-Johan Grinnemo, Anna Brunström, Simone Ferlin, Özgü Alay, Nicolas Kuhn, 2019
- Caso Giuseppe, Özgü Alay, Anna Brunström, Mohammad Rajiullah, Jonas Karlsson, Karl-Johan Grinnemo, Erik Aumayr, Anne-Marie Bosneag, Georgious Xilouris, Andreas Oikonomakis, Themistoklis Anagnostopoulos, Harilaous Koumaras, Almudena Dias-Zayas, Bruno Garcia, Marc Emmelmann, Fabian Eichhorn, Thomas Briedigkeit, Santosh Kumar Rajaguru, Arun Prakash, Elisa Jimeno, Christos Sakkas, Panos Matzakos, Ivan Pretel, L. Reichert, Phillipp Schoppmann, Jesus Teran Gutierrez, Alexander Phinikarides, 2019
- Van-Giang Nguyen, Adrian Carlsson, Karl-Johan Grinnemo, Jun Cheng, Javid Taheri, Anna Brunström, 2019
- Jonathan Vestin, Andreas Kassler, Deval Bhamare, Karl-Johan Grinnemo, Jan-Olof Andersson, Gergely Pongracz, 2019
- Habtegebreil Kassaye Haile, Per Hurtig, Karl-Johan Grinnemo, Anna Brunström, 2019
- Habtegebreil Kassaye Haile, Per Hurtig, Karl-Johan Grinnemo, 2019
- Dejene Boru Oljira, Karl-Johan Grinnemo, Anna Brunström, Javid Taheri, 2019
- Åke Arvidsson, Karl-Johan Grinnemo, Eric Chen, Wang Qinghua, Anna Brunström, 2019
- Habtegebreil Kassaye Haile, Per Hurtig, Karl-Johan Grinnemo, Anna Brunström, Eneko Atxutegi Narbona, Fidel Liberal, Åke Arvidsson, 2018
- Bengt Ahlgren, Per Hurtig, Henrik Abrahamsson, Karl-Johan Grinnemo, Anna Brunström, 2018
- Per Hurtig, Habtegebreil Kassaye Haile, Karl-Johan Grinnemo, Anna Brunström, Eneko Atxutegi, Fidel Liberal, Åke Arvidsson, 2018
- Van-Giang Nguyen, Karl-Johan Grinnemo, Javid Taheri, Anna Brunström, 2018
- Dejene Boru Oljira, Karl-Johan Grinnemo, Javid Taheri, Anna Brunström, 2018
- Van-Giang Nguyen, Karl-Johan Grinnemo, Javid Taheri, Anna Brunström, 2018
- Eneko Atxutegi, Fidel Liberal, Habtegebreil Kassaye Haile, Karl-Johan Grinnemo, Anna Brunström, Åke Arvidsson, 2018
- Van-Giang Nguyen, Anna Brunström, Karl-Johan Grinnemo, Javid Taheri, 2018
- Eneko Atxutegi, Fidel Liberal, Karl-Johan Grinnemo, Anna Brunström, Åke Arvidsson, 2018
- Johan Eklund, Karl-Johan Grinnemo, Anna Brunström, 2018
- Van-Giang Nguyen, Anna Brunström, Karl-Johan Grinnemo, Javid Taheri, 2017
- Dejene Boru Oljira, Karl-Johan Grinnemo, Javid Taheri, Anna Brunström, 2017
- Per Hurtig, Stefan Alfredsson, Anna Brunström, Kristian Evensen, Karl-Johan Grinnemo, Audun Fosselie Hansen, Tomasz Rozensztrauch, 2017
- Felix Weinrank, Karl-Johan Grinnemo, Zdravko Bozakov, Anna Brunström, Thomas Dreibholz, Gorry Fairhurst, Per Hurtig, Naeem Khademi, Michael Tüxen, 2017
- Bengt Ahlgren, Per Hurtig, Henrik Abrahamsson, Karl-Johan Grinnemo, Anna Brunström, 2017
- Naeem Khademi, Zdravko Bozakov, Anna Brunström, Øystein Dale, Dragana Damjanovic, Kristian Riktor Evensen, Gorry Fairhurst, Karl-Johan Grinnemo, Tom Jones, Simone Mangiante, Andreas Petlund, David Ros, Daniel Stenberg, Michael Tüxen, Felix Weinrank,, Michael Welzl, 2017
- Naeem Khademi, Zdravko Bozakov, Anna Brunström, Øystein Dale, Dragana Damjanovic, Kristian Riktor Evensen, Gorry Fairhurst, Andreas Fischer, Karl-Johan Grinnemo, Tom Jones, Simone Mangiante, Andreas Petlund, David Ros, Irene Rüngeler, Daniel Stenberg, Michael Tüxen, Felix Weinrank, Michael Welzl, 2017
- Karl-Johan Grinnemo, Zdravko Bozakov, Anna Brunström, María Isabel Bueno, Dragana Damjanovic, Kristian Rikter Evensen, Gorry Fairhurst, Audun Hansen, David Hayes, Per Hurtig, Naeem Khademi, Simone Mangiante, Althaff Mohideen, Mohammad Rajiullah, David Ros, Irene Rüngeler, Ricardo Santos, Raffaello Secchi, Tor Christian Tangenes, Micheal Tüxen, Felix Weinrank, Michael Welzl, 2017
- Karl-Johan Grinnemo, Anna Brunström, Gorry Fairhurst, David Hayes, Per Hurtig, Naeem Khademi, David Ros, Irene Rüngeler, Michael Tüxen, Felix Weinrank, Michael Welzl, 2017
- Karl-Johan Grinnemo, Zdravko Bozakov, Anna Brunström, Maria Isabel Sanchez Bueno, Thomas Dreibholz, Kristian Rikter Evensen, Gorry Fairhurst, Audun Fosselie Hansen, David Hayes, Per Hurtig, Mohammad Rajiullah, Tom Jones, David Ros, Tomasz Rozensztrauch, Michael Tüxen, Eric Vyncke, 2017
- Giorgos Papastergiou, Gorry Fairhurst, David Ros, Anna Brunström, Karl-Johan Grinnemo, Per Hurtig, Naeem Khademi, Michael Tüxen, Michael Welzl, Dragana Damjanovic, Simone Mangiante, 2017
- Naeem Khademi, David Ros, Michael Welzl, Zdravko Bozakov, Anna Brunström, Gorry Fairhurst, Karl-Johan Grinnemo, David Hayes, Per Hurtig, Tom Jones, Simone Mangiante, Michael Tüxen, Felix Weinrank, 2017
- Eneko Atxutegi, Karl-Johan Grinnemo, Andoni Izurza, Åke Arvidsson, Fidel Liberal, Anna Brunström, 2017
- Van-Giang Nguyen, Anna Brunström, Karl-Johan Grinnemo, Javid Taheri, 2017
- Jun Cheng, Karl-Johan Grinnemo, 2017
- Carl Philip Matsson, Thodsapon Kaewprathum, Adam Larsson, Karl-Johan Grinnemo, 2016
- Dejene Boru Oljira, Anna Brunström, Javid Taheri, Karl-Johan Grinnemo, 2016
- Rémi Robert, Eneko Narbona Atxutegi, Åke Arvidsson, Fidel Liberal, Anna Brunström, Karl-Johan Grinnemo, 2016
- Gorry Fairhurst, Tom Jones, Zdravko Bozakov, Anna Brunström, Dragana Damjanovic, Toerless Eckert, Kristian Riktor Evensen, Karl-Johan Grinnemo, Audun Fosselie Hansen, Naeem Khademi, Simon Mangiante, Patrick McManus, Giorgos Papastergiou, David Ros, Michael Tüxen, Eric Vyncke, Michael Welzl, 2016
- Zdravko Bozakov, Anna Brunström, Dragana Damjanovic, Kristian Riktor Evensen, Gorry Fairhurst, Karl-Johan Grinnemo, Tom Jones, Simone Mangiante, Giorgos Papastergiou, David Ros, Michael Tüxen, Michael Welzl, 2016
- Johan Eklund, Karl-Johan Grinnemo, Anna Brunstrom, 2016
- Dejene Boru Oljira, Anna Brunström, Javid Taheri, Karl-Johan Grinnemo, 2016
- Alexander Nilsson, Filip Västlund, Sebastian Salomonsson, Karl-Johan Grinnemo, 2016
- Karl-Johan Grinnemo, Anna Brunström, Tom Jones, Gorry Fairhurst, Per Hurtig, David Ros, 2016
- Georgios Papastergiou, Karl-Johan Grinnemo, Anna Brunström, David Ros, Michael Tuexen, Naeem Khademi, Per Hurtig, 2016
- Christos Christoforidis, Niklas Ivarsson, Henrik Johansson, Jonas Nilsson, Karl-Johan Grinnemo, 2016
- Andreas Bergman, Marcus Pieskä, Simon Westlinder, Josefine Rust, Karl-Johan Grinnemo, 2016
- Johan Eklund, Karl-Johan Grinnemo, Anna Brunström, 2016
- Eneko Atxutegi, Fidel Liberal, Karl-Johan Grinnemo, Anna Brunström, Åke Arvidsson, Remi Robert, 2016
- Karl-Johan Grinnemo, Tom Jones, Gorry Fairhurst, David Ros, Anna Brunström, Per Hurtig, 2016
- Karl-Johan Grinnemo, Anna Brunström, 2015
- Pehr Söderman, Karl-Johan Grinnemo, Markus Hidell, Peter Sjodin, 2015
- Johan Eklund, Karl-Johan Grinnemo, Anna Brunström, 2015
- Pehr Söderman, Karl-Johan Grinnemo, Markus Hidell, Peter Sjödin, 2014
- Karl-Johan Grinnemo, Anna Brunstrom, 2014
- Karl-Johan Grinnemo, Anna Brunstrom, Jun Cheng, 2014
- Pehr Söderman, Johan Eklund, Karl-Johan Grinnemo, Marcus Hidell, Anna Brunstrom, 2013
- Karl-Johan Grinnemo, Anna Brunstrom, 2013
- Pehr Söderman, Karl-Johan Grinnemo, Georgios Cheimonidis, Yuri Ismailov, Anna Brunstrom, 2012
- Johan Eklund, Karl-Johan Grinnemo, Anna Brunstrom, 2012
- Johan Eklund, Karl-Johan Grinnemo, Anna Brunstrom, 2012
- Pehr Söderman, Markus Hidell, Karl-Johan Grinnemo, Anna Brunstrom, 2012
- Pehr Söderman, Markus Hidell, Karl-Johan Grinnemo, Anna Brunström, 2012
- Johan Eklund, Anna Brunström, Karl-Johan Grinnemo, Georgios Cheimonidis, Yuri Ismailov, 2011
- Johan Eklund, Anna Brunström, Karl-Johan Grinnemo, Georgios Cheimonidis, Yuri Ismailov, 2011
- Johan Eklund, Anna Brunstrom, Karl-Johan Grinnemo, 2011
- Johan Eklund, Karl-Johan Grinnemo, Anna Brunstrom, 2010
- Karl-Johan Grinnemo, 2010
- Johan Eklund, Karl-Johan Grinnemo, Stephan Baucke, Anna Brunstrom, 2010
- Johan Eklund, Karl-Johan Grinnemo, Anna Brunstrom, 2008
- Lukasz Budzisz, Ramon Ferrús, Anna Brunstrom, Karl-Johan Grinnemo, Roberta Fracchia, Giulio Galante, Ferran Casadewall, 2008
- Lukasz Budzisz, Ramon Ferrus, Karl-Johan Grinnemo, Anna Brunstrom, 2007
- Karl-Johan Grinnemo, Anna Brunstrom, 2006
- Karl-Johan Grinnemo, Anna Brunström, 2005
- Stefan Lindskog, Karl-Johan Grinnemo, Anna Brunstrom, 2005
- Karl-Johan Grinnemo, Anna Brunstrom, 2005
- Karl-Johan Grinnemo, Anna Brunstrom, Torbjörn Andersson, 2005
- Karl-Johan Grinnemo, Anna Brunstrom, 2004
- Stefan Lindskog, Karl-Johan Grinnemo, Anna Brunstrom, 2004
- Karl-Johan Grinnemo, Anna Brunstrom, 2004
- Karl-Johan Grinnemo, Johan Garcia, Anna Brunstrom, 2004
- Karl-Johan Grinnemo, Anna Brunstrom, 2003
- Karl-Johan Grinnemo, Anna Brunström, 2003
- Karl-Johan Grinnemo, Anna Brunström, 2003
- Karl-Johan Grinnemo, Anna Brunstrom, 2002
- Karl-Johan Grinnemo, Anna Brunström, 2002
- Karl-Johan Grinnemo, 2002
- Karl-Johan Grinnemo, 2002
- Karl-Johan Grinnemo, Anna Brunstrom, Johan Garcia, 2002
- Karl-Johan Grinnemo, 2002
- Karl-Johan Grinnemo, Anna Brunstrom, 2001
- Karl-Johan Grinnemo, Anna Brunstrom, 2001
- Katarina Asplund, Anna Brunstrom, Johan Garcia, Sean Schneyer, Karl-Johan Grinnemo, 1999
- Dejene Boru Oljira, Karl-Johan Grinnemo, Anna Brunström, Javid Taheri, Andreas Kassler,
- Dejene Boru Oljira, Karl-Johan Grinnemo, Anna Brunström, Javid Taheri, Olivier Tilmans, De Schepper Koen,
- Stephan Baucke, Karl-Johan Grinnemo, Reiner Ludwig, Anna Brunström, Adam Wolisz,
