Internet of Things Group
Info
Our team specializes in Internet of Things (IoT) research, with emphasis on wireless communication and network protocols. We design and analyze the performance of network protocols, address issues related to interoperability, and the semantic description of data and operation of IoT systems. In addition, we investigate auto-configuration, energy consumption minimization, and localization in embedded devices.
We specialize in:
- -LP WAN networks, participating in the works of the LoRa Alliance (including the Relay / D2D Task Force);
- -Indoor localization using UWB and BLE AoA.
We also work on applying artificial intelligence and machine learning to analyze data generated by IoT devices to assist in detecting anomalies such as water leaks or device failures. In cooperation with the industry, we have developed algorithms to increase the accuracy of UWB and BLE indoor localization systems, analyzed measurements from large LoRa networks to identify problem sources, and developed tools for automatic network reconfiguration in response to a failure and to assist in network design.
We have extensive experience working with various technologies and platforms. We specialize in the design and implementation of systems based on technologies such as LoRa, LTE, WiFi, and heterogeneous networks. In our projects, we also work with mesh networks, which are becoming increasingly popular in the IoT world, due to their ability to self-regulate, scalability, and reliability.
We have completed the following projects:
- "Optimization and Load Balancing in Next Generation Wireless Networks"
- "Dynamic wireless framework for Smart City IoT infrastructure"
- "HybridMeshMeet: development of a hybrid system for neighborhood relation detection based on mesh network for MILES industry"
- "Integrated system for epidemiological threat analysis and business process management supported by personnel and corporate asset location techniques" (PL)
- "Augmented Intelligence Ecosystem for Water Distribution Network Analysts" (PL)
Publications
2012
- Czachórski T.; Grochla K.; Józefiok A.; Nycz T.; Pekergin F.; Gelenbe E.; Lent R.; Sakellari G.; Performance Evaluation of a Multiuser Interactive Networking System: A Comparison of Modelling Methods; Computer and Information Sciences II; 2012
2011
- Nowak M.; Nowak S.; Pecka P.; Grochla K.; Content Identification in PI CAN Network; Computer Networks; 2011
- Klamka J.; Czachórski T.; Grochla K.; Modelling TCP Connection in WIMAX Network Using Fluid Flow Approximation.; Applications and the Internet; 2011
- Grochla K.; Czachórski T.; Klamka J.; Numerical Model of Tcp in 802.16 Networks Using Fluid Flow Approximation; First International Conference on Networking and Future Internet 2011 (ICNFI 2011); 2011
- Czachórski T.; Grochla K.; Józefiok A.; Nycz T.; Simulation, Markov Chain and Diffusion Approximation Models – a Case Study; “Computer Science & Information Technologies” (CSIT’2011); 2011
- Czachórski T.; Grochla K.; Józefiok A.; Nycz T.; Porównanie metod analizy efektywności na przykładzie serwera aplikacji w sieci lokalnej; Studia Informatica; 2011
2010
- Czachórski T.; Grochla K.; Nycz T.; Pekergin F.; A diffusion approximation model for wireless networks based on IEEE 802.11 standard, Computer Communication Journal; Computer Communication Journal; 2010
- Czachórski T.; Grochla K.; Nycz T.; Pekergin F.; Czachórski T.; Modeling the IEEE 802.11 Networks MAC Layer Using Diffusion Approximation; Proceeding of HET-NETs 2010; 2010
- Józefiok A.; Czachórski T.; Grochla K.; Czachórski T.; Performance evaluation of multiuser interactive networking system; Proceedings of 6th International Conference HET-NETs 2010; 2010
2009
- Grochla K.; Sochan A.; Adaptive Streaming of Stereographic Video; Computer Networks – Communications in Computer and Information Science, Springer; 2009
2008
- Grochla K.; Sochan A.; Głomb P.; Borcochi -.; Transmission of scalable video streams; Proceedings from the 4th Euro-NGI Workshop on New trends in network architectures and services; 2008
- Grochla K.; Simulation Comparison of Active Queue Management Algorithms in TCP/IP Networks; Journal of Telecommunication Systems; 2008
- Czachórski T.; Grochla K.; Pekergin F.; TCP performance for a wireless traffic, a diffusion approxiation model; Proceedings from Workshop on Wireless and mobility in Future Generation Internet; 2008
- Czachórski T.; Grochla K.; Pekergin F.; Un modele d’approximation de diffusion pour la distribution du temps d’acheminement des paquets dans les réseaux de senseurs; Colloque francophone sur l’ingénierie des protocoles; 2008
- Czachórski T.; Grochla K.; Pekergin F.; Estimation of packet transfer time at sensor networks, diffusion approximation approach; Proceedings from HET-NETs; 2008
2007
- Grochla K.; Czachórski T.; Busic A.; Fourneau J.; Simulation Analysis of Deflection Routing in Hypercube; Proceedings from Polish Teletraffic Symposium; 2007
- Grochla K.; The Analysis Of Traffic Shaping In Tcp Connection In Laboratory Network; Proceedings from ISAT Conference; 2007
- Grochla K.; Simulation Analysis of Active Queue Management Algorithms in IP Networks; Proceedings from Fourth EuroFGI Workshop on "New Trends in Modelling, Quantitative Methods and Measurements"; 2007
- Czachórski T.; Grochla K.; Pekergin F.; Fluid-flow Approximation Model of TCP-NCR in wired-wireless networks; Proceedings from Polish Teletraffic Symposium; 2007
- Czachórski T.; Grochla K.; Pekergin F.; Garcia-Vidal J.; Cerda-Alabern L.; Stability and Dynamics of TCP-NCR(DCR) Protocol; Lecture Notes in Computer Systems 4396 - Wireless Systems and Mobility in Next Generation Internet; 2007
- Brachman A.; Czachórski T.; Grochla K.; Analiza wydajności protokołu TCP-NCR w sieciach bezprzewodowych; Materiały Konferencji Sieci Komputerowe; 2007
- Busic A.; Czachórski T.; Fourneau J.; Grochla K.; Level Crossing Ordering of Markov Chains: Proving Convergence and Bounding End to End Delays in an All Optical Network; ACM Proceedings from Valuetools 2007; 2007
2006
- Grochla K.; Pecka P.; The Markov chain model of RED active queuing management algorithm; Proceedings from HET-NETs 2006; 2006
- Grochla K.; Pecka P.; Analiza wydajności mechanizmu RED za pomocą łańcuchów Markowa z czasem ciągłym; Materiały Konferencji Sieci Komputerowe; 2006