TY - CHAP A1 - Zenger, Gerhard A1 - Kenner, Susanne A1 - Volbert, Klaus A1 - Waas, Thomas A1 - Kucera, Markus T1 - Acquiring energy data from a medium-voltage grid for future smart grid solutions: A practical smart grid application example realized by use of cellular communication networks of the 2nd and 3rd generation T2 - Proceedings of the 11th Workshop on Intelligent Solutions in Embedded Systems (WISES), 10-11 Sept. 2013, Pilsen, Czech Republic N2 - In this paper we present a practical example of the use of Cellular Communication standards like GPRS and UMTS in a Smart Grid Application. For a more detailed view we demonstrate a possible implementation of Cellular Communication Technologies in a data acquisition application for the collection of energy indicators in a medium-voltage grid. Furthermore, we show a technical overview of relevant and common mobile communication standards available in Germany. The included theoretical examples, Smart Grid scenarios, presented data and results are based on a research project for intelligent power regulation in medium-voltage grids performed in Regensburg (Germany). It is a joint project' of the University of Applied Sciences Regensburg together with a local energy provider and a manufacturer for distribution network systems. KW - Mobile communication KW - Medium voltage KW - Standards KW - Smart grids KW - Feeds KW - Ground penetrating radar Y1 - 2013 UR - https://ieeexplore.ieee.org/document/6664954 SN - 978-3-00-042899-9 SP - 1 EP - 8 PB - IEEE ER - TY - CHAP A1 - Kenner, Susanne A1 - Thaler, Raphael A1 - Kucera, Markus A1 - Volbert, Klaus A1 - Waas, Thomas T1 - Smart Grid architecture for monitoring and analyzing, including modbus and REST performance comparison T2 - International Workshop on Intelligent Solutions in Embedded Systems (WISES), 12th, 29.-30. Oct. 2015, Ancona, Italy N2 - Smart Grid, Smart Metering, Electromobility and the regulation of the power network are keywords of the transition in energy policies. In the future, the power grid will be smart. Due to this the OTH Regensburg does research in this area based on different projects. This paper presents a data collection, analyzing and monitoring software for a reference Smart Grid. We discuss two possible architectures for collecting data from energy analyzers. The performance is analyzed with respect to real-time monitoring, analyzing load peaks and automated regulation of the power grid. KW - Software KW - Computer architecture KW - Smart grids KW - Protocols KW - Databases KW - Servers KW - TCPIP Y1 - 2015 UR - https://ieeexplore.ieee.org/document/7356988 SN - 978-8-8875-4808-2 SP - 96 ER - TY - CHAP A1 - Weiß, Martin Georg A1 - Volbert, Klaus ED - Falter, Thomas T1 - Intelligente Steuerung von Industrierobotern T2 - Zweite OTH-Clusterkonferenz 18. Januar 2017 Techbase, Regensburg Y1 - 2017 CY - Regensburg ER - TY - CHAP A1 - Schwindl, Tobias A1 - Volbert, Klaus A1 - Bock, Sebastian ED - Fleury, Eric ED - Ahrens, Andreas ED - Benavente-Peces, César ED - Cam-Winget, Nancy T1 - Fast and Reliable Update Protocols in WSNs During Software Development, Testing and Deployment T2 - Proceedings of the 7th International Conference on Sensor Networks - SENSORNETS, Funchal, January 22-24, 2018, Madeira, Portugal N2 - A lot of research has been done in the area of Wireless Sensor Networks during the past years. Today, Wireless Sensor Networks are in field in many different ways and applications (e.g. energy management services, heat and water billing, smoke detectors). Nevertheless, research and development is continued in this area. After the network is deployed, software updates are performed very rarely, but during development and testing one typical, high frequented task is to deploy a new firmware to thousands of nodes. In this paper, we consider such a software update for a special, but well-known and frequently used sensor network platform. There exist some interesting research papers about updating sensor nodes, but we have a special focus on the technical update process. In this context, we show the reasons why these existing update processes do not cover our challenges. Our goal is to allow a developer to update thousands of nodes reliably and very fast during development and testing. Fo r this purpose, it is not so important to perform the best update with regard to energy consumption. We do not need a multi hop protocol, because all devices are in range, e.g., in a laboratory. In our work, we present a model of the update process and give very fast protocols to solve it. The results of our extensive simulations show that the developed protocols do a fast, scalable and reliable update. KW - WSN KW - Software Update KW - Low-Power Devices Y1 - 2018 UR - https://www.scitepress.org/DigitalLibrary/Link.aspx?doi=10.5220/0006534400190030 SN - 978-989-758-284-4 U6 - https://doi.org/10.5220/0006534400190030 SP - 19 EP - 30 PB - SCITEPRESS - Science and Technology Publications Lda CY - Setúbal, Portugal ER - TY - CHAP A1 - Rührup, Stefan A1 - Schindelhauer, Christian A1 - Volbert, Klaus T1 - Performance analysis of the hierarchical layer graph for wireless networks T2 - 4th International Conference, ADHOC-NOW 2005, Cancun, Mexico, October 6-8, 2005 N2 - The Hierarchical Layer Graph (HL graph) is a promising network topology for wireless networks with variable transmission ranges. It was introduced and analyzed by Meyer auf der Heide et al. 2004. In this paper we present a distributed, localized and resource-efficient algorithm for constructing this graph. The qualtiy of the HL graph depends on the domination radius and the publication radius, which affect the amount of interference in the network. These parameters also determine whether the HL graph is a c-spanner, which implies an energy-efficient topology. We investigate the performance on randomly distributed node sets and show that the restrictions on these parameters derived from a worst case analysis are not so tight using realistic settings. Here, we present the results of our extensive experimental evaluation, measuring congestion, dilation and energy. Congestion includes the load that is induced by interfering edges. We distinguish between congestion and realistic congestion where we also take the signal-to-interference ratio into account. Our experiments show that the HL graph contains energy-efficient paths as well as paths with a few number of hops while preserving a low congestion. KW - Wireless Network KW - Transmission Range KW - Topology Control KW - Leader Election KW - Unit Disk Graph Y1 - 2005 SN - 978-3-540-29132-9 SN - 978-3-540-32086-9 U6 - https://doi.org/10.1007/11561354_21 SP - 244 EP - 257 PB - Springer CY - Berlin ; Heidelberg ER - TY - CHAP A1 - Thelen, Simon A1 - Volbert, Klaus A1 - Nunes, Danilo Weber T1 - A Survey on Algorithmic Problems in Wireless Systems T2 - Proceedings of the 12th International Conference on Sensor Networks (SENSORNETS), Vol 1, Feb 23, 2023 - Feb 24, 2023, Lisbon, Portugal N2 - Considering the ongoing growth of Wireless Sensor Networks (WSNs) and the challenges they pose due to their hardware limitations as well as the intrinsic complexity of their interactions, specialized algorithms have the potential to help solving these challenges. We present a survey on recent developments regarding algorithmic problems which have applications in wireless systems and WSNs in particular. Focusing on the intersection between WSNs and algorithms, we give an overview of recent results inside this intersection, concerning topics such as routing, interference minimization, latency reduction, localization among others. Progress on solving these problems could be potentially beneficial for the industry as a whole by increasing network throughput, reducing latency or making systems more energy-efficient. We summarize and structure these recent developments and list interesting open problems to be investigated in future works. KW - Algorithms KW - WSNs KW - Survey KW - Network Construction KW - Routing KW - Interference KW - Localization KW - Charging KW - Latency Y1 - 2023 SN - 978-989-758-635-4 U6 - https://doi.org/10.5220/0011791200003399 SP - 101 EP - 111 PB - SCITEPRESS - Science and Technology Publications ER - TY - CHAP A1 - Nunes, Danilo Weber A1 - Volbert, Klaus T1 - A Wireless Low-power System for Digital Identification of Examinees (Including Covid-19 Checks) T2 - Proceedings of the 11th International Conference on Sensor Networks (SENSORNETS), 07.02.2022 - 08.02.2022 N2 - Indoor localization has been, for the past decade, a subject under intense development. There is, however, no currently available solution that covers all possible scenarios. Received Signal Strength Indicator (RSSI) based methods, although the most widely researched, still suffer from problems due to environment noise. In this paper, we present a system using Bluetooth Low Energy (BLE) beacons attached to the desks to localize students in exam rooms and, at the same time, automatically register them for the given exam. By using Kalman Filters (KFs) and discretizing the location task, the presented solution is capable of achieving 100% accuracy within a distance of 45cm from the center of the desk. As the pandemic gets more controlled, with our lives slowly transitioning back to normal, there are still sanitary measures being applied. An example being the necessity to show a certification of vaccination or previous disease. Those certifications need to be manually checked for everyone entering the university’s building, which requires time and staff. With that in mind, the automatic check for Covid certificates feature is also built into our system. KW - Indoor Navigation KW - Indoor Localisation KW - Low-power Devices KW - Internet of Things KW - RSSI KW - BLE Beacons Y1 - 2022 SN - 978-989-758-551-7 U6 - https://doi.org/10.5220/0010912800003118 SP - 51 EP - 59 PB - SCITEPRESS - Science and Technology Publications ER - TY - CHAP A1 - Thelen, Simon A1 - Eder, Friedrich A1 - Melzer, Matthias A1 - Nunes, Danilo Weber A1 - Stadler, Michael A1 - Rechenauer, Christian A1 - Obergrießer, Mathias A1 - Jubeh, Ruben A1 - Volbert, Klaus A1 - Dünnweber, Jan T1 - A Slim Digital Twin For A Smart City And Its Residents T2 - SOICT '23: Proceedings of the 12th International Symposium on Information and Communication Technology, 2023, Hi Chi Minh, Vietnam N2 - In the engineering domain, representing real-world objects using a body of data, called a digital twin, which is frequently updated by “live” measurements, has shown various advantages over tradi- tional modelling and simulation techniques. Consequently, urban planners have a strong interest in digital twin technology, since it provides them with a laboratory for experimenting with data before making far-reaching decisions. Realizing these decisions involves the work of professionals in the architecture, engineering and construction (AEC) domain who nowadays collaborate via the methodology of building information modeling (BIM). At the same time, the citizen plays an integral role both in the data acquisition phase, while also being a beneficiary of the improved resource management strategies. In this paper, we present a prototype for a “digital energy twin” platform we designed in cooperation with the city of Regensburg. We show how our extensible platform de- sign can satisfy the various requirements of multiple user groups through a series of data processing solutions and visualizations, in- dicating valuable design and implementation guidelines for future projects. In particular, we focus on two example use cases concern- ing building electricity monitoring and BIM. By implementing a flexible data processing architecture we can involve citizens in the data acquisition process, meeting the demands of modern users regarding maximum transparency in the handling of their data. KW - smart city KW - AI KW - digital twin KW - artificial intelligence KW - urban planning KW - BIM KW - portal system Y1 - 2023 SN - 979-8-4007-0891-6 U6 - https://doi.org/10.1145/3628797.3628936 SP - 8 EP - 15 PB - ACM ER - TY - CHAP A1 - Legler, Katharina A1 - Jajja, Muhammad Sheheryar A1 - Volbert, Klaus T1 - Analysis and Design of Smart Components in Digital Energy Twins T2 - Proceedings of the 10th International Conference on Internet of Things, Big Data and Security., Porto, Portugal April 6-8, 2025 N2 - The energy crisis, energy demand growth, and dependence on fossil fuels worldwide have made urgent action necessary for us to seek sustainability in energy production and use. Digital technologies, especially Digital Energy Twins, have immense potential to reduce energy consumption, thereby reducing environmental impacts, particularly in the building sector. This paper presents the development of a digital energy twin that supports sustainable energy consumption analysis and optimization. Our study begins with a comprehensive analysis of the energy consumption data, the weather data, and the building plans as a solid basis for the analysis. We identify key energy consumption trends and patterns across different timescales and device-specific details that could be optimized, such as base load consumption and device-specific inefficiencies. A key part of our work is forecasting energy consumption using time series models, such as the ARIMA model, which promises to be useful in identify ing patterns for improving energy efficiency. Overall, our study provides valuable insights into energy optimization and could form the base for further advances in digital energy twins at OTH Regensburg, helping to contribute to its sustainable development goals and smart campus initiatives. KW - Data Visualization KW - Digital Twins KW - Internet of Things KW - Machine Learning Models Y1 - 2025 SN - 978-989-758-750-4 U6 - https://doi.org/10.5220/0013289900003944 SP - 263 EP - 272 PB - SciTePress - Science and Technology Publications CY - Setúbal, Portugal ER -