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International Conference on Network and Service Management

作者： Michael Seufert Tobias Hossfeld Christian Sieber Institute of Computer Science University of Würzburg Würzburg Germany Chair of Modeling of Adaptive Systems Universitat Duisburg-Essen Duisburg Nordrhein-Westfalen DE Institute for Communication Networks Technische Universität München Munich Germany

ISBN: (纸本)9781467378574

HTTP Adaptive Streaming (HAS) adapts the video quality to the current network condition by switching between different quality layers. As HAS was shown to perform better than classical video streaming, it is becoming increasingly popular. Recent research showed that quality switch amplitude and time on layer have an impact on the Quality of Experience (QoE) of HAS. However, those studies focused only on adaptation between two layers so far. This work extends these findings by taking adaptation between three layers into account. Thereby, especially the impact of an intermediate layer on user perceived quality is investigated. Crowdsourcing experiments were conducted in order to collect subjective ratings for adaptation between three layers. The results indicate that the quality of each layer and the time on each layer are important QoE parameters. This encourages the usage of temporal pooling approaches for QoE prediction and QoE-aware traffic management. Therefore, mean pooling of per-frame metrics will be applied and its performance will be validated with the subjective crowdsourcing results.

关键词： Crowdsourcing Switches Streaming media Adaptation models Video recording Quality assessment Measurement

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5G New Radio Techniques for 3D networks in Connection-critical Scenarios

5G New Radio Techniques for 3D Networks in Connection-critic...

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IEEE Conference on Aerospace

作者： Luca Valcarenghi Justine Cris Borromeo Riccardo Bassoli Frank H.P. Fitzek Koteswararao Kondepu Nicola Andriolli Henok Berhanu Tsegaye Claudio Sacchi Scuola Superiore Sant’Anna Pisa Italy Deutsche Telekom Chair of Communication Networks Technische Universitaet at Dresden Dresden Germany Department of Computer Science and Engineering Indian Institute of Technology Karnataka India University of Pisa Pisa Italy Dept. of Information Engineering and Computer Science (DISI) University of Trento Trento Italy Department of Electrical and Computer Engineering The University of New Mexico Albuquerque (NM) NM

The recent natural disasters, such as the Earthquake in Morocco in September 2023, have demonstrated one more time the necessity of immediately restoring lost connectivity to rescue victims living in rural villages that are far from urban areas. In such a framework, three-dimensional (3D) Non-Terrestrial networks (NTNs) are expected to provide continuous wireless coverage at low Average Revenue Per User (ARPU), in disaster-hit and hotspot areas with the help of 5G New Radio (NR). This paper investigates the use of Unmanned Aerial Vehicles (UAV) as transparent aerial networks that perform signal amplification and frequency conversion between a satellite-based 5G network and a User Equipment (UE) using five different frequency bands (i.e., S-band, C-band, X-band, Ku-band, and Ka-band) supporting the satellite communication. The applications of the proposed technology concern connection-critical scenarios like emergency rescue and digital divide mitigation. Results show that 180Mbps to 4.85Gbps throughput can be achieved on the satellite-to-UAV link. Simulated transmission delay and average session time are also evaluated considering a delay budget of 2ms. The related results discussion confirms the viability and effectiveness of the proposed approach in the concerned case of study.

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Integration of Scaled Real-world Testbeds with Digital Twins for Future AI-Enabled 6G networks

Integration of Scaled Real-world Testbeds with Digital Twins...

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IEEE Globecom Workshops

作者： Cedrik Krieger Harun Teper Julia Freytag Irfan Fachrudin Priyanta Philipp Schulte Moritz Roidl Jian-Jia Chen Christian Wietfeld Communication Networks Institute TU Dortmund University Dortmund Germany Department of Computer Science TU Dortmund University Dortmund Germany Fraunhofer Institute for Material Flow and Logistics Dortmund Germany Chair of Material Handling and Warehousing TU Dortmund University Dortmund Germany

Future 6G communication systems need to be carefully evaluated under near real-life boundary conditions to prove their performance beyond theoretical considerations and simulations. In this work, we propose a new, lean approach to integrate and evaluate future 6G network architectures and AI-enabled approaches in scaled physical environments that emulate the full-scale communication, mobility, and environmental conditions powered by a Digital Network Twin (DNT). Our approach is enabled by the realistic modeling of the radio environmental impacts within the DNT, such as path loss, shadowing, and interference. One key contribution lies in the specific communication emulation functionality embedded in the real-time capable DNT, which allows imposing specific communication technology properties of the real-life scenario on the scaled physical environment. In this paper, we introduce a prototyping architecture and present a comprehensive case study to demonstrate the effectiveness of the approach: the AI-enabled mesh routing protocol PARRoT is evaluated in three scaled scenarios (teleoperation, platooning, and intralogistic transport). The results show that future 6G networks can be evaluated in realistic, yet safe and cost-efficient environments before moving onto the real world.

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Comparative Study of Quantum and Classical Error Correction for Future Quantum-6G networks

TechRxiv

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TechRxiv 2023年

作者： Das, Siddharth Bassoli, Riccardo Ferrara, Roberto Nötzel, Janis Deppe, Christian Fitzek, Frank H.P. Boche, Holger The Deutsche Telekom Chair of Communication Networks Institute of Communication Technology Faculty of Electrical and Computer Engineering Technische Universität Dresden Dresden Germany Cluster of Excellence Dresden Germany research group Technische Universität Dresden Dresden Germany The Department of Electrical and Computer Engineering Technische Universität München München Germany München Germany Ruhr University Bochum Bochum44801 Germany

The research on 6G communication networks has started. Currently, the proposed architectures envision the realisation of a fully softwarized network continuum, with in-network intelligence for network management and operations. Moreover, more stringent requirements than 5G have been set in order to support new use cases like telepresence and massive twinning. However, these requirements implies some critical tradeoffs, which are going to limit the promises of 6G. In order to go beyond the intrinsic limitations of 6G, new resources and technologies should be found. That is why, some research groups are now investigating how quantum technologies can be integrated into 6G. This works deals with the scenario of sending classical information via a quantum channel, using the so-called dense coding protocol. If this channel is not ideal, quantum errors can affect the reliability of the communication. Nevertheless, quantum error-correcting codes are still very demanding in terms of resources and redundancy. Then, this work investigates how classical error-correcting codes (in particular, Reed-Solomon codes and turbo codes) can be applied to make reliable classical communications via quantum channels. The preliminary results of this paper show that the employment of classical forward error correction in future hybrid 6G-quantum networks can be very promising. © 2023, CC BY.

关键词： Reed-Solomon codes

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Analytical Model of the WCDMA Radio Interface in UMTS Network with User Differentiation

Analytical Model of the WCDMA Radio Interface in UMTS Networ...

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Advanced International Conference on Telecommunications (AICT)

作者： Maciej Stasiak Piotr Zwierzykowski Janusz Wiewiora Poznan University of Technology Chair of Communication and Computer Networks Polska Telefonia Cyfrowa Sp. z o.o. BSS Optimization Section

ISBN: (纸本)9781424438402

The paper presents an approximate method for modeling of the WCDMA interface in the UMTS network in which the mobile operator introduces priorities and user differentiation. In our considerations we use a model of the full-availability group servicing multi-rate traffic with priorities for services. In the proposed model we assume that user priorities and the priorities for classes of services are introduced into the network. The proposed scheme is applicable for cost-effective WCDMA resource management in 3G mobile networks and can be easily applied to network capacity calculations.

关键词： Analytical model Priorities WCDMA

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Survey on Fully Homomorphic Encryption, Theory, and Applications

TechRxiv

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TechRxiv 2022年

作者： Marcolla, Chiara Sucasas, Victor Manzano, Marc Bassoli, Riccardo Fitzek, Frank H.P. Aaraj, Najwa The Technology Innovation Institute Masdar City Abu Dhabi United Arab Emirates SandboxAQ Palo AltoCA United States The Electronics and Computing Department Faculty of Engineering Mondragon Unibertsitatea Mondragon Spain The Deutsche Telekom Chair of Communication Networks Institute of Communication Technology Faculty of Electrical and Computer Engineering Technische Universität Dresden Dresden Germany Cluster of Excellence Dresden Germany

Data privacy concerns are increasing significantly in the context of Internet of Things, cloud services, edge computing, artificial intelligence applications, and other applications enabled by next generation networks. Homomorphic Encryption addresses privacy challenges by enabling multiple operations to be performed on encrypted messages without decryption. This paper comprehensively addresses homomorphic encryption from both theoretical and practical perspectives. The paper delves into the mathematical foundations required to understand fully homomorphic encryption (FHE). It consequently covers design fundamentals and security properties of FHE, and describes the main FHE schemes based on various mathematical problems. On a more practical level, the paper presents a view on privacy-preserving Machine Learning using homomorphic encryption, then surveys FHE at length from an engineering angle, covering the potential application of FHE in fog computing, and cloud computing services. It also provides a comprehensive analysis of existing state-of-the-art FHE libraries and tools, implemented in software and hardware, and the performance thereof. © 2022, CC BY.

关键词： Next generation networks

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Negative Latency in computer Vision: A Key to Efficient Edge Offloading

Negative Latency in Computer Vision: A Key to Efficient Edge...

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IEEE Conference on Global communications (GLOBECOM)

作者： Jonas Schulz Susu Hu Stefanie Speidel Patrick Seeling Frank H. P. Fitzek Deutsche Telekom Chair of Communication Networks TU Dresden Germany Department of Translational Surgical Oncology NCT/UCC Dresden Faculty of Medicine University Hospital Carl Gustav Carus TUD Dresden University of Technology Dresden Germany Centre for Tactile Internet With Human-in-the-Loop (CeTI) Department of Computer Science Central Michigan University USA Joint Project 6G-Life

ISBN: (数字)9798350351255

ISBN: (纸本)9798350351262

Object recognition tasks are commonplace in industrial and medical applications, but resource-limited end devices common to the Internet of Things (IoT) are limited in capabilities and commonly require offloading of compute-intensive tasks. We evaluate the negative latency concept as a new approach to image detection and object recognition applications in low-bandwidth scenarios without a feedback channel. We employ image quality assessment and risk estimators associated with image quality degradation for progressively transmitted images to realize negative latency. Our comprehensive evaluation on image recognition and object detection tasks shows that image quality assessment over progressively transmitted images can be enabled by using risk estimators associated with image quality degradation during progressive transmission. In turn, our approach provides the framework for service latency and resource use reductions.

关键词： Image quality Measurement Degradation computer vision Computational modeling Transform coding Object detection Encoding Internet of Things Object recognition

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Model-based service provisioning in optical networks

Model-based service provisioning in optical networks

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49th European Conference on Optical communications (ECOC 2023)

作者： V. Karunakaran J. Müller F. Slyne K. Kaeval S. Troia A. Autenrieth D. C. Kilper T. Bauschert M. Ruffini Adtran Fraunhoferstr. 9a 82152 Martinsried/Munich Germany Connect Research Centre School of Computer Science and Statistics Trinity College Dublin Republic of Ireland Tallinn University of Technology Tallinn Estonia Department of Electronics Information and Bioengineering Politecnico di Milano Milan 20133 Italy Chair of Communication Networks TU Chemnitz Reichenhainerstr. 70 D-09126 Chemnitz Germany

To support increased traffic demands and facilitate rapid network expansion, we propose a digital twin software architecture considering its design paradigms using OpenROADM to enable performance analysis in optical networks. A service provisioning use-case is presented, showcasing its potential in optical network management.

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Quantum Enhanced Time Synchronisation for communication Network

TechRxiv

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TechRxiv 2023年

作者： Nande, Swaraj Shekhar Paul, Marius Senk, Stefan Ulbricht, Marian Bassoli, Riccardo Fitzek, Frank H.P. Boche, Holger Deutsche Telekom Chair of Communication Networks Technische Universität Dresden Dresden Germany Cluster of Excellence Dresden Germany Research Group Technische Universität Dresden Dresden Germany Department of Electrical and Computer Engineering Technische Universität München München Germany Schellingstr. 4 München80799 Germany Cluster of Excellence Ruhr Universität Bochum Bochum Germany

It is essential to establish precise times in future communication networks. Any real-time task’s function depends on the system’s ability to synchronise time. Time synchronisation is critical in the current communication network and must be maintained to transmit data packets . The functionality of 6G, the Tactile Internet, Time-Sensitive Networking, and ultra-reliable low-latency communications is highly susceptible to time synchronisation. We investigated the idea of employing time synchronisation across different communication network nodes. The current state-of-the-art employs network protocols like Precision-Time Protocol for synchronising clocks across different nodes. These network protocols are not robust and can generate jitters in data transmission. In this paper, we suggested synchronising the time of the node clocks at three different places using quantum technology. Notably, the oscillation frequencies of each qubit (or oscillator) located at these nodes can be synchronised using the quantum synchronisation technique. This set of three oscillators will work as a single clock and will be the master clock of the network . We propose distributing precise time and frequency standards using quantum synchronisation on node clocks. We can synchronise the three qubits (each placed at one node) to oscillate at an identical frequency by applying an external field of a wavelength of 813.32 nm. We analysed our model for different coupling constants and dissipation rates to provide an analysis of the behaviour of the amount of synchronisation in different experimental configurations. The optimal accuracy for our system is 1.6 × 1015 signals per second. Further, we used the Allan deviation to examine the stability of our system for various noise strengths. © 2023, CC BY.

关键词： Synchronization

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On the Need of Neuromorphic Twins to Detect Denial-of-Service Attacks on communication networks

arXiv

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arXiv 2022年

作者： Boche, Holger Schaefer, Rafael F. Poor, H. Vincent Fitzek, Frank H.P. The Institute of Theoretical Information Technology Technische Universität München Munich80290 Germany Ruhr University Bochum Bochum44801 Germany Information Theory and Machine Learning Technische Universität Dresden Dresden01062 Germany The Department of Electrical and Computer Engineering Princeton University PrincetonNJ08544 United States The Deutsche Telekom Chair of Communication Networks Technische Universität Dresden Dresden01187 Germany Germany

As we are more and more dependent on the communication technologies, resilience against any attacks on communication networks is important to guarantee the digital sovereignty of our society. New developments of communication networks tackle the problem of resilience by in-network computing approaches for higher protocol layers, while the physical layer remains an open problem. This is particularly true for wireless communication systems which are inherently vulnerable to adversarial attacks due to the open nature of the wireless medium. In denial-of-service (DoS) attacks, an active adversary is able to completely disrupt the communication and it has been shown that Turing machines are incapable of detecting such attacks. As Turing machines provide the fundamental limits of digital information processing and therewith of digital twins, this implies that even the most powerful digital twins that preserve all information of the physical network error-free are not capable of detecting such attacks. This stimulates the question of how powerful the information processing hardware must be to enable the detection of DoS attacks. Therefore, in the paper the need of neuromorphic twins is advocated and by the use of Blum-Shub-Smale machines a first implementation that enables the detection of DoS attacks is shown. This result holds for both cases of with and without constraints on the input and jamming sequences of the adversary. © 2022, CC BY.

关键词： Turing machines

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