IEEE Open Journal of the Communications Society最新文献_第4页

Hybrid Near/Far-Field Communications of RIS-Aided Cell-Free Massive MIMO With Visibility Region Detection

IF 6.3

IEEE Open Journal of the Communications Society Pub Date : 2025-02-18 DOI: 10.1109/OJCOMS.2025.3543393

Xiangjun Ma;Ali Arshad Nasir;Daniel Benevides Da Costa

{"title":"Hybrid Near/Far-Field Communications of RIS-Aided Cell-Free Massive MIMO With Visibility Region Detection","authors":"Xiangjun Ma;Ali Arshad Nasir;Daniel Benevides Da Costa","doi":"10.1109/OJCOMS.2025.3543393","DOIUrl":"https://doi.org/10.1109/OJCOMS.2025.3543393","url":null,"abstract":"This paper analyzes visibility region (VR) detection and spectral efficiency (SE) in a reconfigurable intelligent surface (RIS)-aided cell-free massive multiple-input multiple-output (CF-mMIMO) system, with a focus on hybrid near-field (NF) and far-field (FF) communication. A statistical channel model is introduced, leveraging the Fresnel approximation and Rayleigh distance concepts. To enable VR detection using signals received from the radio-frequency (RF) chains of the RIS, a novel detection matrix based on the Welch-bound-equality (WBE) codebook is proposed. Its performance is thoroughly analyzed, with closed-form expressions derived for the probabilities of missed detection and false alarm. Based on the estimated VRs, a generalized expression for the estimated aggregated channel from the user equipment (UE) to the access point (AP) is derived using the linear minimum mean-squared-error (LMMSE) estimator, which supports SE analysis. To mitigate pilot contamination during VR detection and channel state information (CSI) estimation, a novel two-stage pilot assignment scheme is proposed. In the VR detection stage, orthogonal pilots are assigned to NF-UEs while FF-UEs remain silent, enhancing detection accuracy. In the CSI estimation stage, UE-AP cooperation is integrated with pilot assignment and power control, delivering superior SE performance compared to the group-based scheme.","PeriodicalId":33803,"journal":{"name":"IEEE Open Journal of the Communications Society","volume":"6 ","pages":"1710-1726"},"PeriodicalIF":6.3,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10891689","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143637907","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Underdetermined AOA Estimation Using Non-Uniform Sub-Connected Hybrid Beamforming Systems

IF 6.3

IEEE Open Journal of the Communications Society Pub Date : 2025-02-17 DOI: 10.1109/OJCOMS.2025.3542843

Yu-Chen Liu;Hsuan-Jung Su;Yasuhiro Takano

引用次数: 0

Efficient and Physically Consistent Modeling of Reconfigurable Electromagnetic Structures

IF 6.3

IEEE Open Journal of the Communications Society Pub Date : 2025-02-17 DOI: 10.1109/OJCOMS.2025.3542621

Alexander Stutz-Tirri;Georg Schwan;Christoph Studer

{"title":"Efficient and Physically Consistent Modeling of Reconfigurable Electromagnetic Structures","authors":"Alexander Stutz-Tirri;Georg Schwan;Christoph Studer","doi":"10.1109/OJCOMS.2025.3542621","DOIUrl":"https://doi.org/10.1109/OJCOMS.2025.3542621","url":null,"abstract":"Reconfigurable electromagnetic structures (REMSs), such as reconfigurable reflectarrays (RRAs) or reconfigurable intelligent surfaces (RISs), hold significant potential to improve the spectral efficiency of wireless communication systems and the accuracy of wireless sensing systems. Even though several REMS modeling approaches have been proposed in recent years, the literature lacks models that are both computationally efficient and physically consistent. As a result, algorithms that control the reconfigurable elements of REMSs (e.g., the phase shifts of a RIS) are often built on simplistic and thus inaccurate models. To enable physically accurate REMS-parameter tuning, we present a new framework for efficient and physically consistent modeling of general REMSs. Our modeling method combines a circuit-theoretic approach with a new formalism that describes a REMS’s interaction with the electromagnetic (EM) waves in its far-field region. Our modeling method enables efficient computation of the entire far-field radiation pattern for arbitrary configurations of the REMS reconfigurable elements once a single full-wave EM simulation of the non-reconfigurable parts of the REMS has been performed. The predictions made by our framework align with the physical laws of classical electrodynamics and model effects caused by inter-antenna coupling, non-reciprocal materials, polarization, ohmic losses, matching losses, influence of metallic housings, noise from low-noise amplifiers, and noise arising in or received by antennas. In order to validate the efficiency and accuracy of our modeling approach, we (i) compare our modeling method to EM simulations and (ii) conduct a case study involving an RRA that enables simultaneous multiuser beam- and null-forming using a new, computationally efficient, and physically accurate parameter tuning algorithm.","PeriodicalId":33803,"journal":{"name":"IEEE Open Journal of the Communications Society","volume":"6 ","pages":"1610-1633"},"PeriodicalIF":6.3,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10891131","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient Symbol Detection for Holographic MIMO Communications With Unitary Approximate Message Passing

IF 6.3

IEEE Open Journal of the Communications Society Pub Date : 2025-02-17 DOI: 10.1109/OJCOMS.2025.3542860

Yabo Guo;Zhengdao Yuan;Peng Sun;Yi Song;Qinghua Guo;Zhongyong Wang

{"title":"Efficient Symbol Detection for Holographic MIMO Communications With Unitary Approximate Message Passing","authors":"Yabo Guo;Zhengdao Yuan;Peng Sun;Yi Song;Qinghua Guo;Zhongyong Wang","doi":"10.1109/OJCOMS.2025.3542860","DOIUrl":"https://doi.org/10.1109/OJCOMS.2025.3542860","url":null,"abstract":"Holographic multiple-input multiple-output (HMIMO) technology holds great promise for delivering high energy and spectral efficiency, boosting system capacity, enhancing diversity, and achieving other significant performance gains. In this work, we focus on the issue of HMIMO symbol detection, which is challenging due to the non-ideal characteristics of the HMIMO near-field (NF) channel matrix introduced by the dyadic Green’s function. These characteristics, such as high-dimensional, ill-conditioned, correlated or rank-deficient, pose considerable difficulties for effective symbol detection. To tackle this problem, we propose an efficient symbol detection algorithm by leveraging the structures of HMIMO NF channel. Specifically, by exploiting the block symmetry of the fully polarized NF channel model, we first decompose the high-dimensional signal model into multiple low-dimensional sub-models, which reduces the computational complexity of preprocessing for the channel matrix compared to its predecessor, thus permitting the design of efficient symbol detection algorithms. Then, building upon these multiple sub-signal models, we formulate the symbol detection problem within a probabilistic framework and construct the corresponding factor graph. By utilizing this factor graph and unitary approximate message passing (UAMP), we propose an efficient Bayesian symbol detection algorithm. The proposed symbol detection algorithm effectively mitigates the adverse effects caused by imperfections in the HMIMO NF polarized channel matrix. Simulation results verify the proposed method outperforms the conventional symbol detector.","PeriodicalId":33803,"journal":{"name":"IEEE Open Journal of the Communications Society","volume":"6 ","pages":"1363-1371"},"PeriodicalIF":6.3,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10891486","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143519856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

C-RAN and Optical Fronthaul Latency in Representative Network Topologies

IF 6.3

IEEE Open Journal of the Communications Society Pub Date : 2025-02-17 DOI: 10.1109/OJCOMS.2025.3542479

Dave Townend;Stuart D. Walker;Neil Parkin;Anvar Tukmanov

{"title":"C-RAN and Optical Fronthaul Latency in Representative Network Topologies","authors":"Dave Townend;Stuart D. Walker;Neil Parkin;Anvar Tukmanov","doi":"10.1109/OJCOMS.2025.3542479","DOIUrl":"https://doi.org/10.1109/OJCOMS.2025.3542479","url":null,"abstract":"This paper presents a feasibility study aimed at understanding centralized radio access network (C-RAN) deployments based on incumbent distributed radio access network (D-RAN) topologies. A model is derived to allow realistic latency characteristics to be calculated for fronthaul connectivity between existing cell sites and transport network aggregation nodes (hubs) suitable for baseband centralization. Analysis has demonstrated that as much as 96% of urban cell site neighbor pairs could satisfy C-RAN fronthaul latency budgets if baseband processing were to be centralized at the local transport hub and 91% when centralized at the regional transport hub using single mode fiber. Findings suggest that the feasibility of advanced coordinated transmission schemes between such pairings could be realized based on existing real-world fiber deployment topologies. Furthermore, the proportion of sites that could support C-RAN requirements could be increased further to 97% when aggregated at local transport hubs and 95% at regional hubs where hollow core fiber transport solutions are employed.","PeriodicalId":33803,"journal":{"name":"IEEE Open Journal of the Communications Society","volume":"6 ","pages":"1438-1445"},"PeriodicalIF":6.3,"publicationDate":"2025-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10891156","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583288","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Pushing the Boundaries of Urban Wireless Networks: A Semantic-Aware Intelligent Network System (SA-INS) for Data-Centric Adaptive Spectrum Management

IF 6.3

IEEE Open Journal of the Communications Society Pub Date : 2025-02-14 DOI: 10.1109/OJCOMS.2025.3542077

Azharul Islam;Kyunghi Chang

{"title":"Pushing the Boundaries of Urban Wireless Networks: A Semantic-Aware Intelligent Network System (SA-INS) for Data-Centric Adaptive Spectrum Management","authors":"Azharul Islam;Kyunghi Chang","doi":"10.1109/OJCOMS.2025.3542077","DOIUrl":"https://doi.org/10.1109/OJCOMS.2025.3542077","url":null,"abstract":"Urban wireless networks are increasingly challenged by the surge in connected devices and data-intensive applications, which exacerbate spectrum scarcity and resource allocation complexities. This paper introduces the semantic-aware intelligent network system (SA-INS), a data-centric framework that redefines resource management through a semantic-aware prioritization approach. By evaluating the contextual content of data, SA-INS ensures optimal information is allocated, surpassing conventional prioritization methods. Additionally, it employs a Q-learning-based algorithm tailored to the unique requirements of semantic-aware communication systems. These enhancements address scalability, multi-objective optimization, and efficient resource allocation. To improve spectrum efficiency in densely connected environments, advanced techniques from 5G and 6G networks are integrated, including in-band full-duplex (IBFD), non-orthogonal multiple access (NOMA), and a water-filling power allocation algorithm. To further refine resource distribution, network slicing is implemented to create virtual networks tailored for specific data types, ensuring efficient quality of service (QoS) provisioning. A multi-objective optimization framework, using the non-dominated sorting genetic algorithm II (NSGA-II), is also incorporated to achieve balanced optimization of conflicting objectives. A comprehensive mathematical framework is developed to rigorously model and analyze the performance of SA-INS, providing deeper insights into system dynamics and trade-offs. Finally, simulation results validate the effectiveness of the proposed system, demonstrating significant improvements in spectrum efficiency, latency, and packet loss rates (PLR) compared to benchmarks.","PeriodicalId":33803,"journal":{"name":"IEEE Open Journal of the Communications Society","volume":"6 ","pages":"1446-1469"},"PeriodicalIF":6.3,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10887294","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modeling M/M/R-JSQ-PS Sojourn Time Distributions for URLLC Services

IF 6.3

IEEE Open Journal of the Communications Society Pub Date : 2025-02-14 DOI: 10.1109/OJCOMS.2025.3542221

Geraint I. Palmer;Jorge Martín-Pérez

{"title":"Modeling M/M/R-JSQ-PS Sojourn Time Distributions for URLLC Services","authors":"Geraint I. Palmer;Jorge Martín-Pérez","doi":"10.1109/OJCOMS.2025.3542221","DOIUrl":"https://doi.org/10.1109/OJCOMS.2025.3542221","url":null,"abstract":"The future of networking promises to support time-sensitive applications that require ultra low latencies and reliabilities of 99.999%. Recent advances in cellular and WiFi connections enhance the network to meet high reliability and ultra low latencies. However, the aforementioned services require that the server processing time ensures low latencies with high reliability, otherwise the end-to-end performance is not met. To that end, in this paper we use queueing theory to model the sojourn time distribution for ultra reliable low latency constrained services of M/M/R-JSQ-PS systems: Markovian queues with R CPUs following a join-shortest-queue processor sharing discipline (for example Linux systems). We develop open-source simulation software, and develop and compare six analytical approximations for the sojourn time distribution. The proposed approximations yield Wasserstein distances below 2 time units, and upon medium loads incur into errors of less than 4.7 time units (e.g., milliseconds) for the <inline-formula> <tex-math>$99.999{^{text {th}}}$ </tex-math></inline-formula> percentile sojourn time. Moreover, the proposed approximations are stable regardless the number of CPUs and stay close to the simulations regardless the service time distribution. To show the applicability of our approximations, we leverage on a real world vehicular dataset to scale a 99.999% reliable vehicular service.","PeriodicalId":33803,"journal":{"name":"IEEE Open Journal of the Communications Society","volume":"6 ","pages":"1634-1652"},"PeriodicalIF":6.3,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10887242","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143601986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anomaly Detection-Based UE-Centric Inter-Cell Interference Suppression

IF 6.3

IEEE Open Journal of the Communications Society Pub Date : 2025-02-13 DOI: 10.1109/OJCOMS.2025.3541832

Kwonyeol Park;Hyuckjin Choi;Beomsoo Ko;Minje Kim;Gyoseung Lee;Daecheol Kwon;Hyunjae Park;Byungseung Kim;Min-Ho Shin;Junil Choi

{"title":"Anomaly Detection-Based UE-Centric Inter-Cell Interference Suppression","authors":"Kwonyeol Park;Hyuckjin Choi;Beomsoo Ko;Minje Kim;Gyoseung Lee;Daecheol Kwon;Hyunjae Park;Byungseung Kim;Min-Ho Shin;Junil Choi","doi":"10.1109/OJCOMS.2025.3541832","DOIUrl":"https://doi.org/10.1109/OJCOMS.2025.3541832","url":null,"abstract":"The increasing spectral reuse can cause significant performance degradation due to interference from neighboring cells. In such scenarios, developing effective interference suppression schemes is necessary to improve overall system performance. To tackle this issue, we propose a novel user equipment-centric interference suppression scheme, which effectively detects inter-cell interference (ICI) and subsequently applies interference whitening to mitigate ICI. The proposed scheme, named Z-refined deep support vector data description, exploits a one-class classification-based anomaly detection technique. Numerical results verify that the proposed scheme outperforms various baselines in terms of interference detection performance with limited time or frequency resources for training and is comparable to the performance based on an ideal genie-aided interference suppression scheme. Furthermore, we demonstrate through test equipment experiments using a commercial fifth-generation modem chipset that the proposed scheme shows performance improvements across various 3rd generation partnership project standard channel environments, including tapped delay line-A, -B, and -C models.","PeriodicalId":33803,"journal":{"name":"IEEE Open Journal of the Communications Society","volume":"6 ","pages":"1512-1527"},"PeriodicalIF":6.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10884837","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Handover Strategy for LEO Satellite Networks Using Bipartite Graph and Hysteresis Margin

IF 6.3

IEEE Open Journal of the Communications Society Pub Date : 2025-02-13 DOI: 10.1109/OJCOMS.2025.3541962

Sahar Eydian;Maryam Hosseini;Gunes Karabulut Kurt

{"title":"Handover Strategy for LEO Satellite Networks Using Bipartite Graph and Hysteresis Margin","authors":"Sahar Eydian;Maryam Hosseini;Gunes Karabulut Kurt","doi":"10.1109/OJCOMS.2025.3541962","DOIUrl":"https://doi.org/10.1109/OJCOMS.2025.3541962","url":null,"abstract":"The low Earth orbit (LEO) satellite constellation has become a highly effective solution for non-terrestrial networks (NTN), offering reliable, uninterrupted, and high-speed global communication. However, the rapid movement of LEO satellites results in a significant handover rate across satellites. Therefore, satellite handover management is essential to ensure the stability and continuity of communication services. This paper proposes a novel weighted bipartite graph-based handover strategy in LEO constellations to enhance quality of service (QoS) and overcome the challenge of frequent satellite handovers. The proposed approach utilizes the Kuhn-Munkres (KM) algorithm to achieve optimal matching with maximum weight, thereby ensuring efficient load distribution and high-quality communication. Moreover, the implementation of hysteresis margin (HM) reduces unnecessary handovers and thus enhances the overall performance of the network. The numerical results demonstrate a significant reduction in handover rate and latency, while improving energy efficiency and achieving enhanced data rates. In particular, our scheme effectively adapts to varying Rician K-factors and demonstrates flexibility under different signal conditions. Furthermore, the obtained results highlight a significant reduction in handover costs and ensure efficient and reliable communication in LEO satellite networks.","PeriodicalId":33803,"journal":{"name":"IEEE Open Journal of the Communications Society","volume":"6 ","pages":"1470-1484"},"PeriodicalIF":6.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10884973","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Learnable Wireless Digital Twins: Reconstructing Electromagnetic Field With Neural Representations

IF 6.3

IEEE Open Journal of the Communications Society Pub Date : 2025-02-13 DOI: 10.1109/OJCOMS.2025.3535959

Shuaifeng Jiang;Qi Qu;Xiaqing Pan;Abhishek K. Agrawal;Richard Newcombe;Ahmed Alkhateeb

{"title":"Learnable Wireless Digital Twins: Reconstructing Electromagnetic Field With Neural Representations","authors":"Shuaifeng Jiang;Qi Qu;Xiaqing Pan;Abhishek K. Agrawal;Richard Newcombe;Ahmed Alkhateeb","doi":"10.1109/OJCOMS.2025.3535959","DOIUrl":"https://doi.org/10.1109/OJCOMS.2025.3535959","url":null,"abstract":"Wireless digital twins, which approximate the communication environment and signal propagation, find many applications in system design and operation, and are envisioned as key enablers for future wireless systems. Building these digital twins, however, is challenging as it requires modeling, not just the environment geometry, but also the electromagnetic (EM) property and the EM interaction effects. To address these challenges, motivated by the latest advancements in computer vision (3D reconstruction and neural radiance field), this paper develops a physics-inspired and modular deep learning framework for practically constructing learnable wireless digital twins. In particular, the proposed framework segments the environment into objects and learns their EM properties and the EM interaction effects using crowd-sourced world-locked wireless channel samples. To showcase the efficacy of the proposed learnable digital twin framework, we evaluate the digital twin by predicting wireless channels based on users’ positions. Simulation results demonstrate that the proposed learnable digital twin can learn the EM property and interaction effects, accurately predict wireless channels, and generalize to changes in the environment. This highlights the prospect of this novel direction for future generation wireless platforms.","PeriodicalId":33803,"journal":{"name":"IEEE Open Journal of the Communications Society","volume":"6 ","pages":"1568-1590"},"PeriodicalIF":6.3,"publicationDate":"2025-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10886938","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143583122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0