Article
Telecommunications
Jose Santa, Konstantinos Katsaros, Luis Bernal-Escobedo, Sadeq Zougari, Marta Miranda, Oscar Castaneda, Benoit Dalet, Angelos Amditis
Summary: This paper evaluates the performance of real 5G deployments in CCAM scenarios, with a focus on cross-border settings and service continuity under inter-operator handovers. Through implementing a use case for autonomous overtaking, the results show that the presence of 5G-NR and edge servers ensures good network performance and proper operation of the service, although handovers have a significant impact on network and overtaking.
VEHICULAR COMMUNICATIONS
(2022)
Article
Computer Science, Information Systems
Fidel Alejandro Rodriguez-Corbo, Leyre Azpilicueta, Mikel Celaya-Echarri, Ana Vazquez Alejos, Francisco Falcone
Summary: This paper provides an updated overview of propagation channel models for vehicular communications, discussing the specific propagation characteristics of complex heterogeneous environments and comparing the advantages and disadvantages of different channel models across various frequency bands. It also outlines future critical challenges and research directions for modeling reliable vehicular communications, such as the effects of vegetation, pedestrians, common scatterers, micro-mobility, and spherical wavefront.
Article
Computer Science, Information Systems
Rabia Ahmed, Farooque Hassan Kumbhar
Summary: This research introduces a novel and efficient clustering scheme VC3 for addressing the challenges of high mobility networks in 5G communications. Simulation experiments conducted in SUMO and NS3 show that VC3 has higher success probability and throughput compared to existing solutions.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2021)
Article
Computer Science, Information Systems
Gosan Noh, Junhyeong Kim, Seungnam Choi, Namsuk Lee, Heesang Chung, Ilgyu Kim
Summary: This paper introduces an mmWave-based V2I communication system and evaluates its feasibility and effectiveness through a field trial on an actual highway. Key technologies are studied to overcome performance degradation of the mmWave system due to high mobility, providing solutions for better quality-of-service for in-vehicle UEs. The proposed system design and related technologies are validated through a real-world testbed, showing that the 5G NR-based mmWave system is feasible and effective for high data rate vehicular communication on a highway.
Article
Engineering, Electrical & Electronic
Amruta A. Nikam, Rupali B. Patil
Summary: This paper presents a custom-designed multiband PIFA antenna suitable for automotive applications, with a wide bandwidth capability and high gain.
EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING
(2023)
Article
Computer Science, Information Systems
Somayeh Aghashahi, Samaneh Aghashahi, Zolfa Zeinalpour-Yazdi, Aliakbar Tadaion, Arash Asadi
Summary: Mobility management in millimeter-wave (mmWave) cellular networks is complex due to the directional beamforming in mmWave devices. Stochastic modeling of mmWave vehicular communication can provide insight into coverage and rate behavior, beyond traditional analysis. This article focuses on beam management in mmWave vehicular networks, particularly in a multi-lane divided highway scenario.
IEEE TRANSACTIONS ON MOBILE COMPUTING
(2023)
Article
Computer Science, Information Systems
Salvador Balkus, Honggang Wang, Brian D. Cornet, Chinmay Mahabal, Hieu Ngo, Hua Fang
Summary: This paper provides a comprehensive literature survey on the intersection between machine learning and vehicular communications in autonomous driving. It explains how shared data can improve the performance of autonomous vehicles and addresses five major questions related to the use of vehicle-to-vehicle and vehicle-to-everything communications.
IEEE COMMUNICATIONS SURVEYS AND TUTORIALS
(2022)
Article
Computer Science, Information Systems
Zaloa Fernandez, Angel Martin, Josu Perez, Mikel Garcia, Gorka Velez, Federico Murciano, Sebastian Peters
Summary: This paper proposes a set of solutions to mitigate the impact of mobility on network connectivity in vehicular applications. The proposed solutions include a dual modem solution, an adaptive bitrate mechanism, a WebRTC server, and a MEC discovery and handover method. The evaluation results indicate that 5G networks have not yet achieved the required performance for CCAM, and practitioners need to implement solutions and workarounds to mitigate the issues.
Article
Geochemistry & Geophysics
Thomas C. Stone
Summary: This article studies the potential impact of lunar radiometric measurements obtained from an orbiting platform. The study finds that lunar irradiance is influenced by spacecraft motion and phase angle, but the changes are relatively small. By planning observations, the variations in target irradiance can be minimized.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2022)
Article
Engineering, Electrical & Electronic
Mario Mueh, Susanne Brandl, Philipp Hinz, Christian Waldschmidt, Christian Damm
Summary: The most proficient instrument for rapid measurements of broadband terahertz spectra is the time-domain spectrometer, driven by a strong need for fast and precise instrumentation in application-oriented research. This study proposes an adapted network analysis calibration scheme for magnitude- and phase-correct wideband scattering parameter measurements, validated through a comparison of simulation and measurement results.
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS
(2021)
Article
Telecommunications
Yunchou Xing, Theodore S. Rappaport, Amitava Ghosh
Summary: This study compares indoor radio propagation measurements and channel statistics at 28, 73, and 140 GHz in an indoor office environment, revealing similarities and differences in propagation characteristics across different frequencies. The research findings show that path loss exponents remain similar across frequencies when using a one meter free space reference distance, while multipath time dispersion decreases at higher frequencies. Additionally, the 3GPP indoor channel model is found to overestimate path loss and have unrealistic numbers of clusters and multipath components per cluster compared to measured channel statistics.
IEEE COMMUNICATIONS LETTERS
(2021)
Article
Telecommunications
Mikkel Bengtson, Yejian Lyu, Wei Fan
Summary: With the increasing demand for high bandwidth wireless communication systems, researchers have been exploring millimeter wave (mmWave) and sub-terahertz (subTHz) frequency bands. Accurate channel modeling is crucial for system design and performance evaluation, which relies on reliable measured channel data. This paper presents a long-range 28 GHz and 300 GHz VNA-based channel sounder and performs measurements in an indoor corridor to understand the frequency dependence of channel parameters in typical deployment scenarios.
CHINA COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Mohamed O. Khalifa, Ahmad M. Yacoub, Daniel N. Aloi
Summary: This article presents a multiwideband monopole antenna for automotive application in LTE and 5G systems, covering the frequency range from 617 MHz to 5 GHz with reasonable rejection on GNSS bands. The antenna is suitable for placement within a shark-fin radome and shows very good performance after simulation, fabrication, and measurement.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2021)
Article
Engineering, Electrical & Electronic
Syed Hashim Ali Shah, Sundar Aditya, Sundeep Rangan
Summary: Bandit algorithms for link tracking in DRX at high frequencies can reduce power consumption by tracking only a fraction of available links without affecting outage and throughput performance. Simulation results show that even sub-optimal link tracking policies can achieve significant power savings with relatively little degradation in performance, especially with digital beamforming enabled at the UE.
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Omkar Pradhan, Lawrence J. Scally, Albin J. Gasiewski, Ali Gorashi, Dean Pizio, David Kraft
Summary: This article presents the design and attenuation measurements of an open-path terahertz transmissometer system operating near the 325-GHz water vapor absorption line. The system aims to validate and improve existing propagation models for THz remote sensing, radiolocation, communications, and related applications. The system is capable of measuring attenuation, phase, and amplitude statistics in diverse atmospheric conditions during continuous long-duration operations.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Engineering, Electrical & Electronic
Tobias Doeker, Christoph Herold, Johannes M. M. Eckhardt, Thomas Kurner
Summary: Low terahertz frequencies are potential candidates for future wireless communication systems. Despite the high path losses, highly directive antennas can be used to compensate for the losses, making eavesdropping challenging. This article evaluates eavesdropping possibilities by investigating the scattering properties of common office objects, such as a coffee cup, a thermos, and a laptop. The results show that eavesdropping opportunities are good when a thermos is used, while for other objects, direct eavesdropping results in lower secrecy capacity in most cases.
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES
(2023)
Article
Telecommunications
Mateen Ashraf, Bo Tan, Dmitri Moltchanov, John S. S. Thompson, Mikko Valkama
Summary: This paper studies a dual functional radar communication (DFRC) system with multiple communication users (CUs) and a radar target. The goal is to optimize the beamforming vectors at the transmitter to enhance radar performance while satisfying the data rate requirements of CUs. Efficient algorithms based on convex optimization techniques are proposed to solve the formulated non-convex optimization problems. The results show that separate probing signals for radar detection are not needed in both clutter scenarios, reducing the complexity of the algorithm.
IEEE TRANSACTIONS ON GREEN COMMUNICATIONS AND NETWORKING
(2023)
Article
Engineering, Electrical & Electronic
Nadezhda Chukhno, Olga Chukhno, Dmitri Moltchanov, Anna Gaydamaka, Andrey Samuylov, Antonella Molinaro, Yevgeni Koucheryavy, Antonio Iera, Giuseppe Araniti
Summary: This study investigates the efficient use of multicast services in 5G NR systems and proposes several machine learning methods to address the problem. The results show a trade-off between accuracy and computational complexity in multicast grouping using decision tree-based algorithms, and the nature of cell coverage also affects the solution options.
IEEE TRANSACTIONS ON BROADCASTING
(2023)
Article
Computer Science, Information Systems
Nadezhda Chukhno, Olga Chukhno, Dmitri Moltchanov, Antonella Molinaro, Yuliya Gaidamaka, Konstantin Samouylov, Yevgeni Koucheryavy, Giuseppe Araniti
Summary: The support of multicast communications in 5G NR system poses challenges to system designers due to highly directional antennas. This study presents a globally optimal solution for multi-beam antenna operation in 5G mmWave systems. The results show that a single beam is always utilized for small cell radii, while the optimal number of beams is upper bounded by 3 for higher cell coverage and practical user ranges (5-50).
IEEE TRANSACTIONS ON MOBILE COMPUTING
(2023)
Article
Engineering, Electrical & Electronic
Anastasia Daraseliya, Eduard Sopin, Dmitri Moltchanov, Yevgeni Koucheryavy, Konstantin Samouylov
Summary: In this paper, the deployment of NR-U base stations operating in licensed and unlicensed mmWave bands in the presence of WiGig traffic is investigated. Performance of different offloading strategies is compared using session loss probability as the main metric of interest.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Tobias Doeker, Mate Boban, Thomas Kuerner
Summary: Future wireless communication systems at low terahertz frequencies face high attenuation losses, which necessitate the use of highly directive antennas. The authors propose a device discovery approach that combines ray tracing with iterative fine tuning. Previous investigations have shown the advantages of this approach over the iterative method, as well as the strong dependence of the ray tracing output on the accuracy of the environmental model. The authors further extend these works by evaluating the impact of antenna characteristics, particularly the sidelobes, on alignment accuracy.
IET MICROWAVES ANTENNAS & PROPAGATION
(2023)
Article
Computer Science, Information Systems
Emil Khayrov, Yevgeni Koucheryavy
Summary: With the introduction of Integrated Access and Backhaul (IAB) technology by 3GPP, the last mile in beyond 5G cellular systems will have multiple wireless backhaul links between user equipment and base station, leading to packet latency as a dominant factor in QoS. Due to blockage and micromobility, directional communications at millimeter wave (mmWave) frequencies may experience frequent outages, resulting in periods of silence and subsequent rate compensation. This paper assesses the impact of mmWave propagation on delay and medium access control (MAC) buffer overflow performance in a 5G NR IAB network node.
Article
Computer Science, Information Systems
Alexander Shurakov, Dmitri Moltchanov, Anatoliy Prikhodko, Abdukodir Khakimov, Evgeny Mokrov, Vyacheslav Begishev, Ivan Belikov, Yevgeni Koucheryavy, Gregory Gol'tsman
Summary: This paper empirically investigates the characteristics of human body blockage at a carrier frequency of 156 GHz. The findings show that the mean attenuation ranges from 8 to 15 dB, the blockage duration varies within 360-390 ms for different transmission distances, and the signal rise and fall times increase with the transmission distance.
COMPUTER COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Johannes M. Eckhardt, Alper Schultze, Ramez Askar, Tobias Doeker, Michael Peter, Wilhelm Keusgen, Thomas Kuerner
Summary: In this paper, researchers present a uniform and collaborative data evaluation method for measurement sets from two different time-domain channel sounders. By extracting discrete multipath components, the properties of the propagation channel are analyzed. The impact of a realistic antenna array on the radio channel for the communication system is examined. The extracted multipath components are published as research data to serve future analytical studies and simulations in relevant scenarios for the sixth generation of mobile systems.
IEEE OPEN JOURNAL OF ANTENNAS AND PROPAGATION
(2023)
Proceedings Paper
Automation & Control Systems
Roman Kovalchukov, Roman Glazkov, Srikathyayani Srikanteswara, Yi Zhang, Dmitri Moltchanov, Gabriel Arrobo, Hao Feng, Marcin Spoczynski, Nageen Himayat
Summary: This paper proposes a new approach for in-network fully distributed dynamic compute composition. The approach allows data and software to be assembled inside the network and enables compute node selection using standardized NDN functionalities. It offers smooth support for dynamic compute services over wireless/mobile edge and edge/fog NDN-based systems.
2023 IEEE 97TH VEHICULAR TECHNOLOGY CONFERENCE, VTC2023-SPRING
(2023)
Proceedings Paper
Automation & Control Systems
Radek Mozny, Pavel Masek, Martin Stusek, Karol Molnar, Marketa Palenska, Dmitri Moltchanov, Jiri Hosek
Summary: Unmanned aerial vehicles (UAVs) have attracted significant attention and offer many potential business opportunities. Airborne infrastructures have unique attributes, such as increased flexibility and line-of-sight connections, which bring new research questions and challenges. Achieving reliable service in all altitudes for unmanned traffic management (UTM) is a key challenge. Results from a measurement campaign at Twente airport showed that the performance of the 4G cellular network is stable up to 60m altitude but degrades significantly at higher altitudes, particularly for downlink transmissions.
2023 IEEE 97TH VEHICULAR TECHNOLOGY CONFERENCE, VTC2023-SPRING
(2023)
Proceedings Paper
Automation & Control Systems
Andrey Samuylov, Dmitri Molichanov, Juho Pirskanen, Jussi Numminen, Yevgeni Koucheryavy, Mikko Valkama
Summary: The recently standardized ETSI DECT-2020 NR technology is expected to enable operator-independent IoT services. Through system-level simulation, this paper evaluates coexistence solutions for DECT-2020 and classic DECT systems, showing that standard listen-before-talk access ensures excellent performance while last-minute scan leads to significant degradation in DECT-2020 performance.
2023 IEEE 97TH VEHICULAR TECHNOLOGY CONFERENCE, VTC2023-SPRING
(2023)
Article
Engineering, Electrical & Electronic
Jan C. Balzer, Clara J. Saraceno, Martin Koch, Priyansha Kaurav, Ullrich R. Pfeiffer, Withawat Withayachumnankul, Thomas Kuerner, Andreas Stoehr, Mohammed El-Absi, Ali Al-Haj Abbas, Thomas Kaiser, Andreas Czylwik
Summary: Terahertz systems offer enormous bandwidths for powerful spectroscopy and high-resolution imaging, as well as potential applications in communication and indoor localization.
IEEE JOURNAL OF MICROWAVES
(2023)
