Charalampos Orfanidis

DTU Compute, Technical University of Denmark

Assistant Professor

About

I am an assistant professor working in Embedded Systems Engineering Section at the Technical University of Denmark. Before I was in KTH Royal Institute of Technology where I got my PhD in Technology and Health. I also spent some time in Uppsala University as PhD student before I move to KTH. My research interests span around Low-Power Wide Area Networks, IoT and Wearables for Sports and Health.

News

October 2024: Thrilled to announce my transition from Postdoc to Assistant Professor!
July 2024: I have been awarded The H.C Ørsted’s Fund to support research in low-power acoustic networks for underwater communication.
October 2023: The paper where we explore how a mobile LoRa jammer might be detected, got accepted at the IEEE Virtual Conference on Communications (VCC).
August 2023: Our poster where we investigate intermittent computing techniques for LPWANs is accepted at MobiCom 2023.
July 2023: A list with available BSc/MSc projects has been published. If you want to do your thesis with me you can have a look to the available projects. You can find the list here.
July 2023: A paper where we present a method to predict the link quality for mobile IoT communication based on a lightweight NN is accepted at the Workshop on Beyond Traditional Sensing for Intelligent Transportation workshop which is co-located with the 26th IEEE International Conference on Intelligent Transportation Systems ITSC 2023.
January 2023: I will be the main teacher of Introduction to Cyber Systems.
June 2022: Our paper which demonstrates how the joining time can be reduced for mobile TSCH networks got accepted at IEEE LCN 2022.
June 2022: I will be teaching Design-Build 4 Autonomous devices for controlling and studying living systems.
May 2022: Our position paper where we envision an AI-enabled shoe wearable to monitor neurological disorders is accepted at DigiBiom 2022 workshop which is co-located with MobiSys 2022.
May 2022: A paper where we utilize plantar biometrics for edge computing is accepted at BodySys 2022 workshop which is co-located with MobiSys 2022.
May 2022: I will be chairing a session at DCOSS 2022 about application-oriented data processing.
April 2022: Our paper introducing the Active Connectivity framework for autonomous mobile robots accepted at IoTI4 workshop which is co-located with DCOSS 2022.
January 2022: I will be involved to Design-Build 1 course where the students are building a system based on a microcontroller for measuring cell growth.

Publications

Peer-Reviewed Journal Papers

HRL-TSCH: A Hierarchical Reinforcement Learning-based TSCH Scheduler for IIoT.

F. F. Jurado Lasso, C. Orfanidis, J. F. Jurado, and X. Fafoutis.
IEEE Transactions on Cognitive Communications and Networking, June 2024.

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TSCH Evaluation Under Heterogeneous Mobile Scenarios

C. Orfanidis, A. Elsts, P. Pop and X. Fafoutis
IoT, Vol. 2, No. 4, pp. 656-668, October 2021.

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TSCH-over-LoRa: Long Range and Reliable IPv6 Multi-hop Networks for the Internet of Things

M. Haubro, C. Orfanidis, G. Oikonomou, and X. Fafoutis
Internet Technology Letters, April 2020

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Energy-Efficient Medium Access Control for Energy Harvesting Communications

X. Fafoutis, A. Di Mauro, C. Orfanidis, N. Dragoni
IEEE Transactions on Consumer Electronics, 61(4): 402-410, 2015

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Altruistic Backoff: Collision Avoidance for Receiver-Initiated MAC Protocols for Wireless Sensor Networks

X. Fafoutis, C. Orfanidis and N. Dragoni
International Journal of Distributed Sensor Networks, Vol. 2014, Article 576401, Hindawi, May 2014

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Peer-Reviewed Conference/Workshop Papers

How Mature is 5G Deployment? A Cross-Sectional, Year-Long Study of 5G Uplink Performance

I. Khan, M. Ghoshal, J. Angjo, S. Dimce, M. Hussain, P. Parastar, Y. Yu, C. Fiandrino, C. Orfanidis, S. Aggarwal, A. C. Aguiar, O. Alay,
C. F. Chiasserini, F. Dressler, Y. C. Hu, S. Y. Ko, D. Koutsonikolas, J. Widmer
IFIP/IEEE Networking, 2024

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Detection of Mobile LoRa Jammers

B. J. Bleszynski, C. Orfanidis, and X. Fafoutis
IEEE Virtual Conference on Communications (VCC), 2023

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Short-Term Wireless Connectivity Prediction for Connected Agricultural Vehicles

B. Ö. Grétarsson, C. Orfanidis , L. Marchegiani, and X. Fafoutis
IEEE 26th International Conference on Intelligent Transportation Systems (IEEE ITSC), Bilbao, Spain, September 2023

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Mobility-focused Joining in TSCH Networks

O.O. Nielsen, L.K Schnügger, C. Orfanidis and X. Fafoutis
IEEE 47th Conference on Local Computer Networks (LCN), Edmonton, Canada, 2022

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Monitoring Neurological Disorders with AI-enabled Wearable Systems

C. Orfanidis, A. Darwich, R. Cheong and X. Fafoutis
ACM 2nd Workshop on Emerging Devices for Digital Biomarkers (DigiBiom), Portland, OR, 2022

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Plantar Biometrics for Edge Computing

M. Stege, C. Orfanidis, and X. Fafoutis
ACM 2nd Workshop on Body-Centric Computing Systems (BodySys), Portland, OR, 2022

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Active Connectivity Fundamentals for TSCH Networks of Mobile Robots

C. Orfanidis, P. Pop, X. Fafoutis
IEEE 4th International Workshop on IoT Applications and Industry 4.0 (IoTI4), Los Angeles, CA, 2022

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Human Computer Interaction aspects of Low-Power Wide Area Networks for Wearable Applications

C. Orfanidis, M. Jacobsson, X. Fafoutis
ACM 1st Workshop on Computer Human Interaction in IoT Applications (CHIIoT), Delft, The Netherlands, 2021

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A Discreet Wearable Long-Range Emergency System based on Embedded Machine Learning

C. Orfanidis, R. B. Haj Hassen, A. Kwiek, X. Fafoutis, M. Jacobsson
IEEE 6th PerCom International workshop on Pervasive Health Technologies (PerHealth), Kassel, Germany, 2021

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Cross-technology Clear Channel Assessment for Low-Power Wide Area Networks

C. Orfanidis, L.M. Feeney, M. Jacobsson, P. Gunningberg
IEEE 16th International Conference on Mobile Ad-Hoc and Smart Systems (MASS), Monterey, CA, 2019

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Investigating interference between LoRa and IEEE 802.15.4g networks

C. Orfanidis, L.M. Feeney, M. Jacobsson, P. Gunningberg
IEEE 13th International Conference on Wireless and Mobile Computing, Networking and Communications (WiMob), Rome, 2017

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Fault Detection in WSNs - An Energy Efficiency Perspective Towards Human-Centric WSNs

C. Orfanidis, Y. Zhang, N. Dragoni,
9th International KES Conference on Agents and Multi-Agent Systems: Technologies and Applications (KES-AMSTA’15, session on Anthropic-Oriented Computing), 2015, Springer

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Using Software-defined Networking Principles for Wireless Sensor Networks

M. Jacobsson, C. Orfanidis
11th Swedish National Computer Networking Workshop (SNCNW'15), Karlstad, Sweden, May 28-29, 2015

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Energy-Efficient Fault-Tolerant Dynamic Event Region Detection in Wireless Sensor Networks

H.-J. Enemark, Y. Zhang, N. Dragoni, C. Orfanidis
IEEE 1st Workshop on Heterogeneous Networking for the Internet of Things (HNIoT), Glascow, Scotland, 2015, IEEE

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Poster/Demo Abstracts

Intermittent Low-Power Wide Area Networks

C. Orfanidis, A. B. Bischoff, L. Pezzarossa
(Poster) ACM 29th Annual International Conference on Mobile Computing and Networking (MobiCom), Madrid, Spain, 2023

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Towards Battery-Free LPWAN Wearables

C. Orfanidis, K. Dimitrakopoulos, X. Fafoutis, M. Jacobsson
(Demo) ACM 7th International Workshop on Energy Harvesting & Energy-Neutral Sensing Systems (ENSsys), New York, NY, 2019

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Preliminary results on LoRaWAN and IEEE 802.15.4-SUN Interference

L.M. Feeney, C. Orfanidis, M. Jacobsson, P. Gunningberg,
(Poster) ACM 16th Conference on Embedded Networked Sensor Systems (SenSys), Shenzhen, China, 2018

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Measuring PHY layer interactions between LoRa and IEEE 802.15.4g networks

C. Orfanidis, L. M. Feeney, M. Jacobsson
(Poster) IEEE/IFIP Networking 2017, Stockholm

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Increasing Robustness in WSN using Software Defined Network Architecture

C. Orfanidis
ACM/IEEE (Poster) PhD forum at the 15th ACM/IEEE Conference on Information Processing in Sensor Networks (IPSN 2016), April 2016, Vienna

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Advising

Patrick Serena Kruse (Project course) - Library development for remote energy measurements of IoT devices in Python
Christina Zhang (Intern) - Long Range ECG Wearable Systens
Tomas Erik Harmer (BSc Thesis) - Exploring Inter-Module Communication and Actuation Systems for Swarm Robotics
Magnus Leander Ovason (MSc Thesis)- Benchmarking Edge Devices for Embedded AI: A Comparative Study
Anton Lage (BEng Thesis) - Smart Shoe Prototype Development for Monitoring Neurological Disorders
Niklas Johansen, Muhammad Farooq (BSc Thesis) - A Software Framework Supporting Intermittent Computing Applications
Viktor Saxil Egesby, Olivier Nicolas Jarrosson Moral, Casper Gerhard Sonne (BSc Thesis) - Reliable mobile IoT networks utilizing UAVs
Kristofer Rhea Rebien Kandle (BSc Thesis) - Intermittent Embedded Machine Learning
Benjamin Mirad Gurini and Bjarke Bak Jensen (Project course) - LoRa Mesh for Safety Tracking applications
Mark Yishi Chen and Gustav Bentzen (Project course) - Gait Pattern Identification for Health applications
Harald Ledertoug Lissau and Nojan Rezvani (BSc Thesis) - TSCH Network for Mobile Robots
Adam Ømosegård Bischoff (MSc Thesis) - Intermittent Computing for Low Power Wide Area Networks
Agamemnon Apladas (MSc Thesis) - LoRa Mobility Investigation
Bartlomiej Jozef Bleszynski (MSc Thesis) - Detection of Mobile LoRa Jammers
Miriam Pohl Khader (BSc Thesis) - Active Connectivity with UAVs
Mads Aaskov Carstensen (MSc Thesis) - Data fusion between Sensors and Computer Vision
Brynjar Örn Grétarsson (MSc Thesis) - Reliability via Active Connectivity for the Internet of Robotic Things
August Falck Kreinert Valentin (BSc Thesis) - A Testbed for Internet-of-Robotic-Things using Remote Control Cars
Oliver Orla Nielsen and Lucas Koefoed Schnügger (MSc Thesis) - Reliable Mobility in Industrial IoT Networks
Mads Stege (MSc Thesis) - Foot Biometric for Security
Arwinder Singh (Project course) - AI hardware accelerator for IoT devices
Vedant Hemant Kamlaskar (Project course) - Battery-free Long Range Smart Shoe
Saadman Haq (MSc Thesis) - Cellular Network Coverage for Smart Agriculture
Athanasios Theocharis (MSc Thesis) - Reliable Mobility in Industrial IoT Networks
Armando Kwiek and Rayén Bel Haj Hassen (BSc Thesis) - Foot Gesture Interface for Long Range Emergency Systems
Konstantinos Dimitrakopoulos (MSc Thesis) - Battery-free LPWAN wearable
Clive Rudd (BSc Thesis) - Energy Harvesting for IoT wearables
Felix Werpers (Project course) - Classifier for wireless interference identification

Service

Act as a peer reviewer for the following journals:

IEEE Transactions on Cognitive Communications and Networking
IEEE Transactions on Industrial Informatics
ACM Transactions on Sensor Networks (TOSN), 2023
Big Data and Cognitive Computing (BDCC) - MDPI
JSAN - MDPI
Pervasive and Mobile Computing - Elsevier
Sensors - MDPI
IEEE Consumer Electronics Magazine
Transactions on Emerging Telecommunications Technologies - Wiley
Annals of Telecommunication - Springer
Wireless Networks (WINE) - Springer
IEEE Access
Ad Hoc Networks - ELSEVIER
Journal of King Saud University - Computer and Information Sciences - ELSEVIER

Act as a peer reviewer for the following conferences/workshops:

WiMob 2024
IFIP/IEEE Networking, 2024
IEEE International Conference on Intelligent Transportation Systems (ITSC) 2023
Swedish National Computer Networking Workshop (SNCNW) 2018, 2019, 2020, 2022
IEEE Global Communications Conference (GLOBECOM) 2022
International Conference on Future Internet of Things and Cloud (FiCloud), 2019
International Conference on Wireless Communications and Signal Processing (WCSP), 2016
IEEE World Forum on Internet of Things (WF-IoT), 2015

Teaching

Spring 2024

Embedded Systems Programming, Main Teacher - Bachelor's level, Technical University of Denmark

Spring 2023 ‐ Spring 2024

Introduction to Cyber Systems, Main teacher - Bachelor's level, Technical University of Denmark

Spring 2022 ‐ Spring 2024

Design-Build 4: Autonomous devices for controlling and studying living systems, Teacher - Bachelor's level, Technical University of Denmark

Spring 2022 ‐ Spring 2023

Design-Build 1: Devices for measuring cell growth, Teaching Assistant - Bachelor's level, Technical University of Denmark

Fall 2021

Continuing education program of DTU Compute, External Lecturer

Fall 2021

Computer Systems, External Lecturer - Bachelor's level, Technical University of Denmark

Spring 2021

Foundations of Distributed Systems, Guest Lecturer - Master's level, Technical University of Denmark

Spring 2021 ‐ Spring 2022

Network Security, Guest Lecturer - Master's level, Technical University of Denmark

Spring 2019 ‐ Spring 2020

Network Security, Teaching Assistant - Bachelor's level, KTH Royal Institute of Technology

Fall 2018 ‐ Spring 2019

Computer Programming, Basic Course, Teaching Assistant - Bachelor's level, KTH Royal Institute of Technology

Fall 2018

Electronic Design, Project Course, Teaching Assistant/Lecturer - Bachelor's level, KTH Royal Institute of Technology

Fall 2017

Computer Networks I, Teaching Assistant - Master's level, Uppsala University

Fall 2015 ‐ Fall 2017

Computer Networks II, Teaching Assistant - Master's level, Uppsala University

Fall 2015 ‐ Fall 2016

Secure Computer Systems I, Teaching Assistant - Master's level, Uppsala University

Fall 2015

Software Testing and Maintenance, Teaching Assistant - Master's level, Uppsala University

Fall 2014

Software Development of Web Services, Teaching Assistant - Master's level, Technical University of Denmark

Spring 2014

Distributed Systems, Teaching Assistant - Master's level, Technical University of Denmark