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5th International Conference on Smart Grid and Smart Cities, ICSGSC 2021

作者： Uster, Felix Plocksties, Franz Timmermann, Dirk Institute of Applied Microelectronics and Computer Engineering University of Rostock Rostock Germany

ISBN: (纸本)9780738133157

Load control for consumer devices offers great potential in terms of power grid stabilization. Utilizing power adaptation capabilities of modern electronics allows a wide range of devices to participate in the grid stabilization. Certain electronic devices, like lighting, are directly perceived by humans or part of larger installations. Therefore, a minimum impact on perception and system integrity facilitates acceptance and allows a wide distribution. Taking advantage of the human properties for perceiving changes in light we propose an effective grid stabilization method for considerable network imbalances in order to utilize the high share of the total power demand in Europe that lighting accounts for. With regard to the results, we can assume a considerable stabilizing effect with hardly noticeable perception. © 2021 IEEE.

关键词： Stabilization

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A SystemC Model of the IEEE 802.11 EDCA Protocol for Virtual Prototyping

A SystemC Model of the IEEE 802.11 EDCA Protocol for Virtual...

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2021 International Symposium on Networks, computers and Communications, ISNCC 2021

作者： Beichler, Benjamin Rethfeldt, Michael Raddatz, Hannes Steffen, Lukas Timmermann, Dirk Haubelt, Christian Institute Of Applied Microelectronics And Computer Engineering University Of Rostock Germany

ISBN: (纸本)9780738113166

Due to the increasing complexity of distributed embedded systems, the development process demands early substantiation of design decisions for the targeted system. Virtual prototypes enable an early validation of hardware/software systems and they have proven to be very beneficial for target software development. However, these prototypes often do not include models for inter-device communication aspects of distributed systems. Especially the use of wireless communication has a significant impact on the overall system behavior and performance. This paper introduces a SystemC model of an essential part of IEEE 802.11 Wireless LAN communication, the Enhanced Distributed Channel Access (EDCA) protocol. In comparison to widely used network simulations, the modeling with SystemC promises an easier integration into existing virtual prototypes. EDCA is the main part of the lower medium access layer (MAC) of IEEE 802.11 and interfaces to the physical-layer communication as well as to non-time-critical higher MAC-layer functions. We conducted experiments with an additional simple physical communication channel model to compare our solution in terms of precision and performance to the well-established network simulator ns-3. We show that our model differs by $\approx 0.3 \%$ of retransmitted frames and an accompanied difference of the overall simulated transmission time of $\approx 0.45 \%$. It meets the overall expectations for the stochastic EDCA protocol. Moreover, the presented model has a significantly better simulation performance with $3 \cdot 10^{-5}$ s wall-clock time per frame, which is at least two orders of magnitude better than with the compared ns-3 simulation. © 2021 IEEE.

关键词： Stochastic systems

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Silent ICU based on IEEE 11073 SDC

Silent ICU based on IEEE 11073 SDC

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作者： Kasparick, Martin Klotz, Tobias Andersen, Björn Thürk, Gregor Neumuth, Thomas Rockstroh, Max Rother, Benjamin Golatowski, Frank B. Braun Melsungen AG Carl-Braun-Straße 1 Melsungen34212 Germany Drägerwerk AG & Co. KGaA Lübeck Germany ICCAS University of Leipzig Leipzig Germany Institute of Applied Microelectronics and Computer Engineering University of Rostock Rostock Germany

Patients and caregivers suffer from alarm-related noise in today's hospitals. While this is a topic for all fields of care, this challenge is especially relevant for intensive care units (ICUs). The noise harms patients, hinders the recovery process, or can even lead to psychosis. For the caregivers, noise causes an enormous stress level and in combination with the high number of clinically irrelevant or false alarms it leads to alarm fatigue and desensitization. These problems result in documented deaths of patients. Therefore, we present a demonstrator of a Silent ICU. Based on a distributed alarm system, the medical devices at the bedside do not create any audio alarm signals, as long as a remote alarm notification system is connected and works properly. An ICU bed place consists of devices from different manufacturers. Thus, a standardized interconnection is necessary. Therefore, we use IEEE 11073 Service-oriented Device Connectivity (SDC) to create a cross-manufacturer distributed alarm system with components from three different companies. A fourth company provides a documentation system for this demonstrator. Patients and caregivers will greatly benefit from Silent ICUs and smart distributed alarm systems that will be build based on interoperable cross-manufacturer environments. © 2023 the author(s), published by Walter de Gruyter Berlin/Boston.

关键词： Intensive care units

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TeleSDC Concept for ISO/IEEE 11073 SDC in telemedicine across unreliable networks

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Current Directions in Biomedical engineering 2021年第2期7卷 403-406页

作者： Pabst, Tobias Stegemann, Dominik Georgi, Christoph Kasparick, Martin Suleder, Julian Neumuth, Thomas Rockstroh, Max Innovation Center Computer Assisted Surgery Institute of Faculty of Medicine University Leipzig Leipzig Germany SurgiTAIX AG Herzogenrath Germany Institute of Applied Microelectronics and Computer Engineering (University Rostock) Rostock Germany ERNW Research GmbH Heidelberg Germany

Telemedicine promises to increase the quality of emergency treatments. Besides the transfer of speech and video data, medical device and patient data will add additional value to the tele-guided emergency personnel. In this paper, we develop a concept for transmitting device and patient data via the open communication standards SDC in a telemedical context, including data transmission over mobile radio networks while considering the limitations of public networks, and opening new usage scenarios for telemedicine. © 2021 by Walter de Gruyter Berlin/Boston.

关键词： Telemedicine

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Estimating Mutual Information for Link Adaptation in Generalized Spatial Modulation Systems with Neural Networks 26

Estimating Mutual Information for Link Adaptation in General...

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26th International ITG Workshop on Smart Antennas, WSA 2023 and 13th Conference on Systems, Communications, and Coding, SCC 2023

作者： Bailon, Daniel Nicolas Kühn, Volker Shavgulidze, Sergo Freudenberger, Jürgen Institute for System Dynamics HTWG Konstanz University of Applied Sciences Germany Institute of Communications Engineering Faculty of Computer Science and Electrical Engineering University of Rostock Germany Faculty of Informatics and Control Systems Georgian Technical University Georgia Germany

ISBN: (纸本)9783800760510

Spatial modulation (SM) is a low-complexity multiple-input/multiple-output transmission technique that combines index modulation and quadrature amplitude modulation for wireless communications. In this work, we consider the problem of link adaption for generalized spatial modulation (GSM) systems that use multiple active transmit antennas simultaneously. Link adaption algorithms require a real-time estimation of the link quality of the time-variant communication channels, e.g., by means of estimating the mutual information. However, determining the mutual information of SM is challenging because no closed-form expressions have been found so far. Recently, multilayer feedforward neural networks were applied to compute the achievable rate of an index modulation link. However, only a small SM system with two transmit and two receive antennas was considered. In this work, we consider a similar approach but investigate larger GSM systems with multiple active antennas. We analyze the portions of mutual information related to antenna selection and the IQ modulation processes, which depend on the GSM variant and the signal constellation. © VDE VERLAG GMBH · Berlin · Offenbach.

关键词： Complex networks

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Effects of deep brain stimulation in the subthalamic nucleus (STN-DBS) on cellular plasticity in catecholaminergic systems in a hemiparkinsonian rat model

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Brain Stimulation 2023年第1期16卷 313-314页

作者： Statz, Meike Kober, Maria Schleuter, Frederike Bathel, Henning Plocksties, Franz Timmermann, Dirk van Rienen, Ursula Fauser, Mareike Storch, Alexander Department of Neurology University of Rostock Germany Institute of General Electrical Engineering University of Rostock Germany Institute of Applied Microelectronics and Computer Engineering University of Rostock Germany Department Life Light & Matter University of Rostock Germany Department Ageing of Individuals and Society University of Rostock Germany German Centre for Neurodegenerative Diseases (DZNE) Rostock/Greifswald Germany

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Accelerated Ageing Test and Lifetime Prediction of MOSFETs 23

Accelerated Ageing Test and Lifetime Prediction of MOSFETs

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23rd European microelectronics and Packaging Conference and Exhibition, EMPC 2021

作者： Maxa, Jacob Nowottnick, Mathias Department of Electrical Engineering and Computer Science Institute of Applied Electronics Circuits University of Rostock Rostock Germany

ISBN: (纸本)9780956808677

An active power cycling test-bed for a power MOSFET is presented in this publication. This setup is used to create temperature dependent load cycles of 24 parallel devices. After a passive calibration step the drain-to-source voltage is used to estimate the junction temperature. The devices are then heated until a predefined value is reached. The setup is power cycled until at least 20 channels failed and then analysed using metallographic cross-sections. Furthermore, this setup records the thermal impedance of each channel over time. With these data it is possible to detect and predict a solder fatigue (crack, void) during operation. Finally after all load cycles the results were evaluated by Weibull plots and a lifetime estimation for other temperatures is given in the way of a stress-life curve. The results suggest a comparable lifetime compared to ceramic-based components, if the substrate does not have an influence as a source of faults. © 2021 2021 23rd European microelectronics and Packaging Conference and Exhibition, EMPC 2021. All rights reserved.

关键词： Power MOSFET

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Decentral load control for data centers 13

Decentral load control for data centers

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2020 IEEE Congress on Cybermatics: 13th IEEE International Conferences on Internet of Things, iThings 2020, 16th IEEE International Conference on Green Computing and Communications, GreenCom 2020, 13th IEEE International Conference on Cyber, Physical and Social Computing, CPSCom 2020 and 6th IEEE International Conference on Smart Data, SmartData 2020

作者： Uster, Felix Plocksties, Franz Timmermann, Dirk Institute of Applied Microelectronics and Computer Engineering University of Rostock Rostock Germany

ISBN: (纸本)9781728176475

The regulation and stabilization of the power grid requires various system services that have been provided so far primarily by conventional power plants. With the future shutdown of coal-fired and nuclear power plants, investigations into the provision of these services will become all the more important in order to ensure the safe operation of the grid. Currently, photovoltaic and wind can only provide limited so-called control power, so that new methods such as the regulation of large consumers will become interesting. Adapting the electricity requirements of consumers to the current grid situation has a comparable effect to the provision of additional balancing power on the generation side. Some consumers like data centers can provide primary control power at high speed. In this paper we present how data centers can autonomously support grid stabilization with minimal impact on the daily operation. Additional benefits include an higher efficiency and the ability to take advantage of any future financial bonuses by regulation authorities or electricity suppliers. © 2020 IEEE.

关键词： Power control

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Low-Complexity Channel Estimation for RIS-Assisted ISAC System

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China Communications 2025年第4期22卷 296-308页

作者： Chen Zhen Li Jianqing Zhang Haijun Zhang Wei The Institute of Microelectronics University of MacaoMacao 999078China School of Computer Science and Engineering Macao University of Science and TechnologyMacao 999078China Beijing Engineering and Technology Research Center for Convergence Networks and Ubiquitous Services University of Science and Technology BeijingBeijing 100083China Henan Academy of Science Applied Physics Institute Co. LtdZhengzhou 450008China

Integrated sensing and communication(ISAC),assisted by reconfigurable intelligent surface(RIS)has emerged as a breakthrough technology to improve the capacity and reliability of 6G wireless ***,a significant challenge in RIS-ISAC systems is the acquisition of channel state information(CSI),largely due to co-channel interference,which hinders meeting the required reliability *** address this issue,a minimax-concave penalty(MCP)-based CSI refinement scheme is *** approach utilizes an element-grouping strategy to jointly estimate the ISAC channel and the RIS phase shift *** previous methods,our scheme exploits the inherent sparsity in RIS-assisted ISAC channels to reduce training overhead,and the near-optimal solution is derived for our studied RIS-ISAC *** effectiveness of the element-grouping strategy is validated through simulation experiments,demonstrating superior channel estimation results when compared to existing benchmarks.

关键词： channel estimation element grouping integrated sensing and communication(ISAC) RIS

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Towards virtual prototyping of electrically active implants using systemc-AMS

Towards virtual prototyping of electrically active implants ...

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GMM/ITG/GI-Workshop Methoden und Beschreibungssprachen zur Modellierung und Verifikation von Schaltungen und Systemen, MBMV 2020 - GMM/ITG/GI Workshop Methods and Description Languages for Modeling and Verification of Circuits and Systems, MBMV 2020

作者： Heller, Jakob Niemann, Christoph Plocksties, Franz Haubelt, Christian Timmermann, Dirk Institute of Applied Microelectronics and Computer Engineering University of Rostock Rostock18051 Germany

ISBN: (纸本)9783800752218

Deep Brain Stimulation is an indispensable therapy option for severe neurodegenerative diseases like parkinson. However, the lack of understanding of the functional principle hinders an optimal clinical application. Therefore, basic research in animal models is crucial. For the development of neurostimulators in rodents, physical prototyping alone is not feasible anymore due to the growing complexity and necessary optimization of the overall implants. However, there is no scientific approach for virtual prototyping of neurostimulators. This work proposes a power model for a developed neurostimulator, based on a time continuous battery model and power-state-machines. The model was implemented in SystemC and SystemC-AMS and validated against measurements. The model helped us understand and find power optimal working points of the implant and thus achieve a runtime gain of 44% with a given battery. Consequently, this work shows that we can use virtual prototyping in SystemC-AMS to aid design decisions for future implant versions. © 2020 MBMV 2020: Methoden und Beschreibungssprachen zur Modellierung und Verifikation von Schaltungen und Systemen - GMM/ITG/GI-Workshop. All rights reserved.

关键词： Virtual prototyping

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