Article
Engineering, Electrical & Electronic
Ronis Maximidis, Christos Vagionas, George Kalfas, Yigal Leiba, Amalia Miliou, Nikos Pleros
Summary: The growing demand for ubiquitous broadband connectivity in 5G/6G Radio Access Networks (RANs) has led to the popularity of Centralized RAN (C-RAN) and reconfigurable Point-to-MultiPoint (PtMP) network topologies. By utilizing an all-passive Arrayed Waveguide Grating Router (AWGR), this study proposes and demonstrates the reconfigurable allocation of multiple parallel Fiber-Wireless (FiWi) millimeter wave (mmWave) analog interfaces. Experimental measurements validate the proposed concept, achieving high data rates and meeting the 5G Key Performance Indicator (KPI) requirements for EVM quality and peak data traffic.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Zihuan Wang, Ming Li, Rang Liu, Qian Liu
Summary: This paper studies the user association and hybrid beamforming in cell-free mmWave systems without full channel state information (CSI) acquisition. A train-and-design framework is developed to jointly design user association, hybrid beamforming, and fronthaul compression with the aid of uplink training. Simulation results demonstrate the effectiveness of the proposed train-and-design framework.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2022)
Article
Telecommunications
Andrea Bonfante, Lorenzo Galati Giordano, Irene Macaluso, Nicola Marchetti
Summary: In this paper, we propose a novel beam recovery procedure that utilizes Machine Learning tools to predict blockage events caused by dynamic blockers in factory environments. By generating synthetic data and training Deep Neural Network models, we demonstrate that our prediction-based approach significantly improves signal level stability and data rate compared to detection-based methods, especially when blockers move at higher speeds.
IEEE TRANSACTIONS ON COGNITIVE COMMUNICATIONS AND NETWORKING
(2022)
Article
Computer Science, Information Systems
Mustafa Mohsin, Jordi Mongay Batalla, Evangelos Pallis, George Mastorakis, Evangelos K. Markakis, Constandinos X. Mavromoustakis
Summary: The concept of open radio access network (O-RAN) is transforming mobile networks, particularly in the deployment of 5G and research on 6G. The O-RAN Alliance suggests that O-RAN can bring openness and intelligence to traditional RAN vendors, allowing for multi-vendor capabilities to reshape the network. This paper addresses the main research challenges of the O-RAN approach in relation to beamforming implementation, proposing the zero-forcing equalizer as a possible solution for achieving flexibility in a high-traffic communication environment.
Article
Telecommunications
Yu Wang, Ticao Zhang, Shiwen Mao, Theodore (Ted) S. Rappaport
Summary: This paper proposes a Hunting-based Directional Neighbor Discovery (HDND) scheme for ad hoc mmWave networks, where nodes determine their transmission or reception mode by following a unique sequence and continuously scan the neighborhood for other mmWave nodes. Through rigorous analysis, conditions for ensured neighbor discovery, worst-case discovery time, and the impact of sidelobes are derived, with extensive simulations validating the superior performance of the proposed scheme.
DIGITAL COMMUNICATIONS AND NETWORKS
(2021)
Article
Engineering, Electrical & Electronic
Hyunjin Kim, Sangwook Nam
Summary: This study introduces methods for transmission enhancement of low-emissivity windows at millimeter wavelengths, utilizing low-pass filtering frequency selective surfaces and antireflection dielectrics to reduce transmission loss. The results show improved transmission loss for various types of windows and incident angles, as well as in a real FWA scenario for coverage extension.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Xuewen Wu, Jingxiao Ma, Chenwei Gu, Xiaoping Xue, Xin Zeng
Summary: This paper introduces the intelligent reflecting surface (IRS) into mmWave cognitive radio networks (CRNs) to enhance spectrum efficiency. It investigates the robust secure beamforming (BF) design in the presence of eavesdroppers (Eves) and imperfect channel state information (CSI). An alternating optimization algorithm is proposed to solve the non-convex problem. Simulation results show that the proposed algorithm achieves comparable achievable secrecy rate (ASR) performance with the optimal solution under perfect CSI.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Nancy Varshney, Swades De
Summary: This paper addresses the issue of serving multiple users over a single highly-directed beam in millimeter-wave communications. By using exhaustive search and variable time scheduling, the optimal beamwidth is optimized to improve user rate and base station energy efficiency. The effect of localization error on beamwidth estimation is minimal but can degrade user Quality-of-Service.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2021)
Article
Computer Science, Information Systems
Salman Mohebi, Foivos Michelinakis, Ahmed Elmokashfi, Ole Grondalen, Kashif Mahmood, Andrea Zanella
Summary: This paper presents the empirical study results of the actual performance of a commercial 5G mmWave cell through on-field measurements. Various scenarios, including human body blockage effects and environmental factors, were considered. The measurement analysis provides valuable information for researchers and 5G verticals to better understand the real-world operation of a 5G mmWave commercial access network.
Article
Engineering, Electrical & Electronic
Qixun Zhang, Xinna Wang, Zhenhao Li, Zhiqing Wei
Summary: The paper proposes a joint sensing and communication integrated system for CAVs to share raw sensing data efficiently using 5G technology. Through modeling and optimization, the best time allocation ratio for sensing and communication functions is achieved to improve environment sensing capabilities. The proposed CTRA algorithm shows a 26% improvement in radar total mutual information, demonstrating the feasibility and effectiveness of the system.
IEEE JOURNAL OF SELECTED TOPICS IN SIGNAL PROCESSING
(2021)
Article
Optics
Kota Ito, Mizuki Suga, Takuto Arai, Yushi Shirato, Naoki Kita, Takeshi Onizawa
Summary: This paper proposes and demonstrates a passive beamformer based remote beamforming scheme for millimeter-wave band radio-over-fiber systems. The scheme enables the control of beam direction for remote radio units from the central station, simplifying the design of the units for flexible and cost-effective deployment.
OPTICS COMMUNICATIONS
(2022)
Article
Chemistry, Analytical
Brecht De Beelde, Mike Vantorre, German Castellanos, Mario Pickavet, Wout Joseph
Summary: The large bandwidths available at millimeter-wave frequencies enable fixed wireless access (FWA) applications. In FWA networks, data are routed from customer premises equipment (CPE) to point of presence (POP) through wireless links. This study analyzes FWA networks using radio propagation models for different wireless technologies at millimeter-wave frequencies. The impact of rain, vegetation, and the number of subscribers on network performance is investigated. A network planning algorithm is presented based on customer device location and available capacity of wireless links. Rain has minimal effect on system capacity. Higher frequencies result in lower power of received signal, but larger bandwidths enable higher channel capacity.
Article
Engineering, Electrical & Electronic
Igor Lima de Paula, Sam Lemey, Dries Bosman, Quinten Van den Brande, Olivier Caytan, Joris Lambrecht, Maarten Cauwe, Guy Torfs, Hendrik Rogier
Summary: The proposed antenna design is cost-effective, compact, and high-performance, suitable for 5G New Radio bands, providing stable performance, wide bandwidth coverage, and grating-lobe-free beamforming capabilities for multiantenna systems.
IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS
(2021)
Article
Chemistry, Analytical
German Castellanos, Brecht De Beelde, David Plets, Luc Martens, Wout Joseph, Margot Deruyck
Summary: This paper evaluates the deployment of FWA networks in the 60 GHz band in realistic urban and rural environments in Belgium. It provides a network planning tool that maximizes user coverage and minimizes network infrastructure using the IEEE 802.11ay standard. The results show that proper edge node locations are essential for achieving viable user coverage, and environmental factors like rain and vegetation can impact network design.
Article
Computer Science, Hardware & Architecture
Yang Wang, Marco Giordani, Xiangming Wen, Michele Zorzi
Summary: The millimeter wave technology allows UAVs to provide high-speed wireless connectivity in 5G/6G networks, but the limited coverage of a single UAV implementing analog beamforming (ABF) requires multiple aerial stations to operate in swarms. This paper investigates the concept of hybrid beamforming (HBF) transceivers to achieve higher flexibility in the beamforming design and presents a stochastic analysis comparing the ergodic capacity and power consumption of UAV mmWave networks under ABF and HBF architectures. The results show that HBF configuration with multiple beams has lower total power consumption despite involving higher energy consumption.
Article
Computer Science, Information Systems
Carlos Natalino, Filip Idzikowski, Luca Chiaraviglio, Lena Wosinska, Paolo Monti
OPTICAL SWITCHING AND NETWORKING
(2019)
Article
Computer Science, Information Systems
Pawel Wiatr, Jiajia Chen, Paolo Monti, Lena Wosinska, Di Yuan
OPTICAL SWITCHING AND NETWORKING
(2019)
Article
Engineering, Electrical & Electronic
Muhammad Rehan Raza, Ahmad Rostaini, Lena Wosinska, Paolo Monti
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2019)
Article
Computer Science, Hardware & Architecture
Federico Tonini, Carla Raffaelli, Lena Wosinska, Paolo Monti
JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING
(2019)
Article
Computer Science, Hardware & Architecture
Yajie Li, Jonas Martensson, Bjorn Skubic, Yongli Zhao, Jie Zhang, Lena Wosinska, Paolo Monti
Article
Telecommunications
Maryam Lashgari, Lena Wosinska, Paolo Monti
Summary: The study addresses a key challenge of 5G networks by proposing a strategy for resource-efficient allocation in large core data centers, which shows significant improvement in resource efficiency. This approach also helps avoid possible violation of service availability requirements and lowers service blocking probability.
IEEE COMMUNICATIONS LETTERS
(2021)
Article
Computer Science, Hardware & Architecture
Ryuta Shiraki, Yojiro Mori, Hiroshi Hasegawa, Ken-Ichi Sato, Paolo Monti
Summary: In this study, an ultradense wavelength-division-multiplexing (WDM) network architecture is proposed to significantly increase channel accommodation density and achieve extremely high spectral efficiency. The trade-offs between high spectral efficiency and severe signal impairment due to optical filtering are resolved by network optimization using fiber-granular routing and wavelength-granular add/drop operations. The proposal enhances spectral efficiency by up to 31.0% compared to comparable dense WDM networks, as verified by numerical simulations on metro-scale network topologies.
JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING
(2021)
Editorial Material
Computer Science, Hardware & Architecture
Marija Furdek, Paolo Monti, Carmen Mas Machuca, Jaroslaw Turkiewicz, David Larrabeiti
Summary: This special issue of JOCN features extended versions of selected papers from the 25th International Conference on Optical Network Design and Modeling. The papers cover various trends in optical networking research, including capacity upgrade, spectral efficiency improvement, novel network architectures, and inter-operator sharing of optical network capacity.
JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING
(2022)
Article
Optics
Haokun Song, Rui Lin, Yajie LI, Qing Lei, Yongli Zhao, Lena Wosinska, Paolo Monti, Jie Zhang
Summary: In this letter, a scheme for detecting fiber-bending eavesdropping based on feature extraction and machine learning is proposed. 5-dimensional features are extracted from the optical signal in the time-domain, and a long short-term memory network is used for eavesdropping and normal event classification. Experimental data from a 60km single-mode fiber transmission link with eavesdropping implemented by a clip-on coupler are utilized. The proposed scheme achieves a detection accuracy of 95.83%, and it does not require additional devices and special link design as it focuses on the time-domain waveform of the received optical signal.
Article
Computer Science, Information Systems
Aleksejs Udalcovs, Marco Levantesi, Patryk Urban, Darli A. A. Mello, Roberto Gaudino, Oskars Ozolins, Paolo Monti
Proceedings Paper
Optics
Ryuta Shiraki, Yojiro Mori, Hiroshi Hasegawa, Ken-ichi Sato, Paolo Monti
METRO AND DATA CENTER OPTICAL NETWORKS AND SHORT-REACH LINKS III
(2020)
Proceedings Paper
Optics
M. Lashgari, C. Natalino, L. M. Contreras, L. Wosinska, P. Monti
2019 ASIA COMMUNICATIONS AND PHOTONICS CONFERENCE (ACP)
(2019)
Article
Telecommunications
Luca Chiaraviglio, Lavinia Amorosi, Nicola Blefari-Melazzi, Paolo Dell'Olmo, Antonio Lo Mastro, Carlos Natalino, Paolo Monti
IEEE TRANSACTIONS ON GREEN COMMUNICATIONS AND NETWORKING
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
Andrea Sgambelluri, Xavier Casas Moreno, Salvatore Spadaro, Paolo Monti
ICC 2019 - 2019 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC)
(2019)
Proceedings Paper
Engineering, Electrical & Electronic
A. Sgambelluri, O. Dugeon, K. Sevilla, F. Ubaldi, P. Monti, O. G. De Dios, F. Paolucci
2019 OPTICAL FIBER COMMUNICATIONS CONFERENCE AND EXHIBITION (OFC)
(2019)
