Pub Date : 2024-11-07DOI: 10.1109/JSYST.2024.3485690
Ngo Hoang Tu;Kyungchun Lee
This study explores multihop full-duplex relay (FDR) networks with multiple-input multiple-output capabilities, aiming to enhance short-packet ultra-reliability and low-latency communications. We derive closed-form expressions for performance metrics in terms of block-error rate, throughput, energy efficiency, reliability, and latency, from which an asymptotic analysis in the high signal-to-noise ratio regime is provided. Extensive simulations validate our theoretical analysis under varying system parameters. The findings indicate that the FDR performance is comparable to half-duplex relaying in specific scenarios. However, analytical expressions involve nonelementary functions, posing challenges for real-time configurations. To overcome this hurdle, we adopt machine-learning (ML) models for multioutput performance prediction with short execution time, low computational complexity, and high accuracy. Among the proposed ML frameworks, the extreme gradient boosting model with multi-output regressors proves to be the most efficient estimator. This network can rapidly respond with the necessary system settings to meet the desired quality of services associated with specific key performance indicators.
{"title":"Multihop MIMO Full-Duplex Relay Networks With Short-Packet URLLCs","authors":"Ngo Hoang Tu;Kyungchun Lee","doi":"10.1109/JSYST.2024.3485690","DOIUrl":"https://doi.org/10.1109/JSYST.2024.3485690","url":null,"abstract":"This study explores multihop full-duplex relay (FDR) networks with multiple-input multiple-output capabilities, aiming to enhance short-packet ultra-reliability and low-latency communications. We derive closed-form expressions for performance metrics in terms of block-error rate, throughput, energy efficiency, reliability, and latency, from which an asymptotic analysis in the high signal-to-noise ratio regime is provided. Extensive simulations validate our theoretical analysis under varying system parameters. The findings indicate that the FDR performance is comparable to half-duplex relaying in specific scenarios. However, analytical expressions involve nonelementary functions, posing challenges for real-time configurations. To overcome this hurdle, we adopt machine-learning (ML) models for multioutput performance prediction with short execution time, low computational complexity, and high accuracy. Among the proposed ML frameworks, the extreme gradient boosting model with multi-output regressors proves to be the most efficient estimator. This network can rapidly respond with the necessary system settings to meet the desired quality of services associated with specific key performance indicators.","PeriodicalId":55017,"journal":{"name":"IEEE Systems Journal","volume":"18 4","pages":"1975-1986"},"PeriodicalIF":4.0,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142777789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01Epub Date: 2022-02-28DOI: 10.1080/08869634.2022.2043021
Wojciech Kondrat, Anna Stocka, Teresa Sierpinska
Objective: To determine the role of emotional state in the masticatory system function in a group of young adults.
Methods: Ninety-six generally healthy randomly selected students aged 18-21 were examined. They were subjected to a questionnaire survey determining their emotional state, clinical examination, and instrumental diagnostics (EMG, Cadiax Compact, JVA).
Results: The stress symptoms group revealed a greater intensity of neck and shoulder muscles pain (p < 0.05) and an increase of electrical potential of the masseter muscles in maximal voluntary clench (p < 0.05). They reported more often headache (p < 0.001), tension/contracture of the head, neck and nape (p < 0.05), and pain while opening the mouth wide (p < 0.05). The values of parameters obtained in the instrumental diagnostics did not reveal differences between the groups.
Conclusion: Stressful situations increase muscular tension but do not have a direct impact on the temporomandibular joints function.
目的：确定情绪状态在青少年咀嚼系统功能中的作用：确定情绪状态在一组年轻人咀嚼系统功能中的作用：方法： 随机选取 96 名年龄在 18-21 岁之间、身体健康的学生进行研究。对他们进行了情绪状态问卷调查、临床检查和仪器诊断（肌电图、Cadiax Compact、JVA）：结果：压力症状组显示颈部和肩部肌肉疼痛的强度更大（p p p p p 结论：压力症状组显示颈部和肩部肌肉疼痛的强度更大：压力会增加肌肉紧张度，但不会直接影响颞下颌关节的功能。
{"title":"Relationship between emotional state and masticatory system function in a group of healthy volunteers aged 18-21.","authors":"Wojciech Kondrat, Anna Stocka, Teresa Sierpinska","doi":"10.1080/08869634.2022.2043021","DOIUrl":"10.1080/08869634.2022.2043021","url":null,"abstract":"<p><strong>Objective: </strong>To determine the role of emotional state in the masticatory system function in a group of young adults.</p><p><strong>Methods: </strong>Ninety-six generally healthy randomly selected students aged 18-21 were examined. They were subjected to a questionnaire survey determining their emotional state, clinical examination, and instrumental diagnostics (EMG, Cadiax Compact, JVA).</p><p><strong>Results: </strong>The stress symptoms group revealed a greater intensity of neck and shoulder muscles pain (<i>p</i> < 0.05) and an increase of electrical potential of the masseter muscles in maximal voluntary clench (<i>p</i> < 0.05). They reported more often headache (<i>p</i> < 0.001), tension/contracture of the head, neck and nape (<i>p</i> < 0.05), and pain while opening the mouth wide (<i>p</i> < 0.05). The values of parameters obtained in the instrumental diagnostics did not reveal differences between the groups.</p><p><strong>Conclusion: </strong>Stressful situations increase muscular tension but do not have a direct impact on the temporomandibular joints function.</p>","PeriodicalId":55017,"journal":{"name":"IEEE Systems Journal","volume":"1 1","pages":"680-687"},"PeriodicalIF":2.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84417242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-11-01DOI: 10.1109/JSYST.2024.3478229
Yunxiang Guo;Dongming Wang;Xinjiang Xia;Jiamin Li;Pengcheng Zhu;Xiaohu You
In this article, we study the system-level performance of cell-free massive multiple-input multiple-output (CF-mMIMO) systems with reciprocity calibration errors (RCEs) and imperfect phase synchronization due to the local oscillator (LO) phase drift. Considering the practical implementation of a remote radio unit (RRU) and the nonreciprocity of downlink–uplink channels due to RCEs and LO phase drift, we model the downlink channel with a random phase rotation. Then, we study the system-level performance of both centralized and distributed CF-mMIMO architectures with maximum ratio transmission (MRT) and zero-forcing (ZF) precoding schemes. We derive the closed-form expressions for the signal-to-interference-plus-noise ratio of the downlink precoding schemes, and obtain the closed-form expressions for the average spectral efficiency (SE) per user with locations of both RRU and user equipment (UE) following the Poisson point process. Simulation results show that the closed-form expressions are accurate when compared with Monte Carlo results. The results demonstrate that the impact of RCEs and LO phase drift on system performance is more severe for centralized ZF precoding than for MRT and distributed ZF precoding. In addition, we reveal the SE performance concerning antenna configuration of RRU, RRU density, UE density, and LO phase drift range.
{"title":"Downlink Performance Analysis of CF-MMIMO With RCEs and LO Phase Drift: A Stochastic Geometry Approach","authors":"Yunxiang Guo;Dongming Wang;Xinjiang Xia;Jiamin Li;Pengcheng Zhu;Xiaohu You","doi":"10.1109/JSYST.2024.3478229","DOIUrl":"https://doi.org/10.1109/JSYST.2024.3478229","url":null,"abstract":"In this article, we study the system-level performance of cell-free massive multiple-input multiple-output (CF-mMIMO) systems with reciprocity calibration errors (RCEs) and imperfect phase synchronization due to the local oscillator (LO) phase drift. Considering the practical implementation of a remote radio unit (RRU) and the nonreciprocity of downlink–uplink channels due to RCEs and LO phase drift, we model the downlink channel with a random phase rotation. Then, we study the system-level performance of both centralized and distributed CF-mMIMO architectures with maximum ratio transmission (MRT) and zero-forcing (ZF) precoding schemes. We derive the closed-form expressions for the signal-to-interference-plus-noise ratio of the downlink precoding schemes, and obtain the closed-form expressions for the average spectral efficiency (SE) per user with locations of both RRU and user equipment (UE) following the Poisson point process. Simulation results show that the closed-form expressions are accurate when compared with Monte Carlo results. The results demonstrate that the impact of RCEs and LO phase drift on system performance is more severe for centralized ZF precoding than for MRT and distributed ZF precoding. In addition, we reveal the SE performance concerning antenna configuration of RRU, RRU density, UE density, and LO phase drift range.","PeriodicalId":55017,"journal":{"name":"IEEE Systems Journal","volume":"18 4","pages":"2145-2156"},"PeriodicalIF":4.0,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142777722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The integration of information and communication technology tools in the smart grid network has made the electricity market operation vulnerable to cyberattacks. The attacks aim at compromising the integrity of market operations by causing profit/loss to a targeted utility/consumer. Injection of false data on sensor measurement allows for maliciously controlling the locational marginal price (LMP) through the state variable. In this work, we propose a false data injection attack (FDIA) on the market operation with the objectives of maximally deviating the LMP and minimizing the attack budget. Considering the conflict between the two objectives, a tradeoff approach based on multiobjective optimization has been proposed. The solution derived postconvergence of the optimization problem provides a set of solutions (Pareto-front), each pertaining to bus locations on which FDIA can be carried out. The solution allows an intruder to design an FDIA based on the priority assigned between market disruption and attack budget. For a given budget for launching an attack, the Pareto-front provides the optimal FDIA configuration for which the deviation in LMP is maximized. To validate the proposed design scheme in practical settings, a real-time testbed is developed involving the cosimulation of the power and communication networks.
{"title":"Design of Real-Time False Data Injection Attack on Electricity Market With Limited Sensor Accessibility","authors":"Brundavanam Seshasai;Ebha Koley;Prasanta Kumar Jena;Subhojit Ghosh","doi":"10.1109/JSYST.2024.3471639","DOIUrl":"https://doi.org/10.1109/JSYST.2024.3471639","url":null,"abstract":"The integration of information and communication technology tools in the smart grid network has made the electricity market operation vulnerable to cyberattacks. The attacks aim at compromising the integrity of market operations by causing profit/loss to a targeted utility/consumer. Injection of false data on sensor measurement allows for maliciously controlling the locational marginal price (LMP) through the state variable. In this work, we propose a false data injection attack (FDIA) on the market operation with the objectives of maximally deviating the LMP and minimizing the attack budget. Considering the conflict between the two objectives, a tradeoff approach based on multiobjective optimization has been proposed. The solution derived postconvergence of the optimization problem provides a set of solutions (Pareto-front), each pertaining to bus locations on which FDIA can be carried out. The solution allows an intruder to design an FDIA based on the priority assigned between market disruption and attack budget. For a given budget for launching an attack, the Pareto-front provides the optimal FDIA configuration for which the deviation in LMP is maximized. To validate the proposed design scheme in practical settings, a real-time testbed is developed involving the cosimulation of the power and communication networks.","PeriodicalId":55017,"journal":{"name":"IEEE Systems Journal","volume":"18 4","pages":"1999-2009"},"PeriodicalIF":4.0,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142777899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This article investigates the performance of physical layer security (PLS) in a vehicle-to-vehicle (V2V) communication system, where a transmitter vehicle exploits a dual reconfigurable intelligent surface (RIS) to send confidential information to legitimate receiver vehicles under the nonorthogonal multiple access (NOMA) scheme in the presence of an eavesdropper vehicle. In particular, it is assumed that an RIS is near the transmitter vehicle and another RIS is close to the receiver vehicles to provide a wider smart radio environment. Besides, we suppose that the channels between two RISs suffer from the Fisher–Snedecor $mathcal {F}$ fading model. Under this scenario, we first provide the marginal distributions of equivalent channels at the legitimate receiver vehicles by exploiting the central limit theorem. Then, in order to evaluate the PLS performance of the considered system model, we derive analytical expressions of the average secrecy capacity (ASC), secrecy outage probability, and secrecy energy efficiency by using the Gauss–Laguerre quadrature and the Gaussian quadrature techniques. Moreover, to gain more insights into the secrecy performance, the asymptotic expression of the ASC is obtained. The numerical results indicate that incorporating the dual RIS in the secure V2V communication under the NOMA scheme can significantly provide ultrareliable transmission and guarantee more secure communication for intelligent transportation systems.
{"title":"Physical Layer Security Performance of Cooperative Dual-RIS-Aided V2V NOMA Communications","authors":"Farshad Rostami Ghadi;Masoud Kaveh;Kai-Kit Wong;Diego Martín","doi":"10.1109/JSYST.2024.3476447","DOIUrl":"https://doi.org/10.1109/JSYST.2024.3476447","url":null,"abstract":"This article investigates the performance of physical layer security (PLS) in a vehicle-to-vehicle (V2V) communication system, where a transmitter vehicle exploits a dual reconfigurable intelligent surface (RIS) to send confidential information to legitimate receiver vehicles under the nonorthogonal multiple access (NOMA) scheme in the presence of an eavesdropper vehicle. In particular, it is assumed that an RIS is near the transmitter vehicle and another RIS is close to the receiver vehicles to provide a wider smart radio environment. Besides, we suppose that the channels between two RISs suffer from the Fisher–Snedecor \u0000<inline-formula><tex-math>$mathcal {F}$</tex-math></inline-formula>\u0000 fading model. Under this scenario, we first provide the marginal distributions of equivalent channels at the legitimate receiver vehicles by exploiting the central limit theorem. Then, in order to evaluate the PLS performance of the considered system model, we derive analytical expressions of the average secrecy capacity (ASC), secrecy outage probability, and secrecy energy efficiency by using the Gauss–Laguerre quadrature and the Gaussian quadrature techniques. Moreover, to gain more insights into the secrecy performance, the asymptotic expression of the ASC is obtained. The numerical results indicate that incorporating the dual RIS in the secure V2V communication under the NOMA scheme can significantly provide ultrareliable transmission and guarantee more secure communication for intelligent transportation systems.","PeriodicalId":55017,"journal":{"name":"IEEE Systems Journal","volume":"18 4","pages":"2074-2084"},"PeriodicalIF":4.0,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142777892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-14DOI: 10.1109/JSYST.2024.3457794
Md. Ali Hasan;M. Humayun Kabir;Md. Shafiqul Islam;Sangmin Han;Wonjae Shin
In signals of opportunity (SOPs)-based positioning utilizing low Earth orbit (LEO) satellites, ephemeris data derived from two-line element files can introduce increasing error over time. To handle the erroneous measurement, an additional base receiver with a known position is often used to compensate for the effect of ephemeris error when positioning the user terminal (UT). However, this approach is insufficient for long baseline (distance between base receiver and UT) as it fails to adequately correct Doppler shift measurement errors caused by ephemeris inaccuracies, resulting in degraded positioning performance. Moreover, the lack of clock synchronization between the base receiver and UT exacerbates erroneous Doppler shift measurements. To address these challenges, we put forth a robust double-difference Doppler shift-based positioning framework, coined 3DPose, to handle the clock synchronization issue between the base receiver and UT, and positioning degradation due to the long baseline. The proposed 3DPose framework leverages double-difference Doppler shift measurements to eliminate the clock synchronization issue and incorporates a novel ephemeris error correction algorithm to enhance UT positioning accuracy in case of the long baseline. The algorithm specifically characterizes and corrects the Doppler shift measurement errors arising from erroneous ephemeris data, focusing on satellite position errors in the tangential direction. To validate the effectiveness of the proposed framework, we conduct comparative analyses across three different scenarios, contrasting its performance with the existing differential Doppler positioning method. The results demonstrate that the proposed 3DPose framework achieves an average reduction of 90% in 3-dimensional positioning errors compared to the benchmark algorithm.
{"title":"A Double-Difference Doppler Shift-Based Positioning Framework With Ephemeris Error Correction of LEO Satellites","authors":"Md. Ali Hasan;M. Humayun Kabir;Md. Shafiqul Islam;Sangmin Han;Wonjae Shin","doi":"10.1109/JSYST.2024.3457794","DOIUrl":"https://doi.org/10.1109/JSYST.2024.3457794","url":null,"abstract":"In signals of opportunity (SOPs)-based positioning utilizing low Earth orbit (LEO) satellites, ephemeris data derived from two-line element files can introduce increasing error over time. To handle the erroneous measurement, an additional base receiver with a known position is often used to compensate for the effect of ephemeris error when positioning the user terminal (UT). However, this approach is insufficient for long baseline (distance between base receiver and UT) as it fails to adequately correct Doppler shift measurement errors caused by ephemeris inaccuracies, resulting in degraded positioning performance. Moreover, the lack of clock synchronization between the base receiver and UT exacerbates erroneous Doppler shift measurements. To address these challenges, we put forth a robust double-difference Doppler shift-based positioning framework, coined 3DPose, to handle the clock synchronization issue between the base receiver and UT, and positioning degradation due to the long baseline. The proposed 3DPose framework leverages double-difference Doppler shift measurements to eliminate the clock synchronization issue and incorporates a novel ephemeris error correction algorithm to enhance UT positioning accuracy in case of the long baseline. The algorithm specifically characterizes and corrects the Doppler shift measurement errors arising from erroneous ephemeris data, focusing on satellite position errors in the tangential direction. To validate the effectiveness of the proposed framework, we conduct comparative analyses across three different scenarios, contrasting its performance with the existing differential Doppler positioning method. The results demonstrate that the proposed 3DPose framework achieves an average reduction of 90% in 3-dimensional positioning errors compared to the benchmark algorithm.","PeriodicalId":55017,"journal":{"name":"IEEE Systems Journal","volume":"18 4","pages":"2157-2168"},"PeriodicalIF":4.0,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142777724","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-14DOI: 10.1109/JSYST.2024.3469932
Xinghua Liu;Jun Yan;Gaoxi Xiao;Xiaoyue Zhang;Tianyang Zhao;Peng Wang
In this article, a novel distributed secondary voltage and active power-sharing control strategy with a Zeno-free event triggering mechanism is proposed, to overcome voltage deviation and inaccurate power-sharing caused by the conventional V-P droop control strategy in multiterminal high voltage direct current grids. The secondary controllers can achieve the voltage restoration and proportional active power sharing within a fixed time. Utilizing the Lyapunov method, the trigger function and trigger condition for the controllers of each voltage source converter (VSC) station are designed, resulting in a significant reduction in the number of controller triggers during system transients and steady state. The fixed-time stabilization theory is employed, which allows a faster convergence performance. Moreover, by using the tanh function, we can get rigorous proof of avoiding Zeno behavior. Finally, a simulation model of five connecting VSC stations is built to demonstrate the satisfactory performance of the proposed control strategy.
{"title":"Distributed Event-Triggered Fixed-Time Secondary Voltage Control and Automatic Power Sharing for MTDC Grids","authors":"Xinghua Liu;Jun Yan;Gaoxi Xiao;Xiaoyue Zhang;Tianyang Zhao;Peng Wang","doi":"10.1109/JSYST.2024.3469932","DOIUrl":"https://doi.org/10.1109/JSYST.2024.3469932","url":null,"abstract":"In this article, a novel distributed secondary voltage and active power-sharing control strategy with a Zeno-free event triggering mechanism is proposed, to overcome voltage deviation and inaccurate power-sharing caused by the conventional V-P droop control strategy in multiterminal high voltage direct current grids. The secondary controllers can achieve the voltage restoration and proportional active power sharing within a fixed time. Utilizing the Lyapunov method, the trigger function and trigger condition for the controllers of each voltage source converter (VSC) station are designed, resulting in a significant reduction in the number of controller triggers during system transients and steady state. The fixed-time stabilization theory is employed, which allows a faster convergence performance. Moreover, by using the tanh function, we can get rigorous proof of avoiding Zeno behavior. Finally, a simulation model of five connecting VSC stations is built to demonstrate the satisfactory performance of the proposed control strategy.","PeriodicalId":55017,"journal":{"name":"IEEE Systems Journal","volume":"18 4","pages":"2010-2021"},"PeriodicalIF":4.0,"publicationDate":"2024-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142777606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-11DOI: 10.1109/JSYST.2024.3470133
Yang Cao;Wenchi Cheng;Jingqing Wang;Wei Zhang
Wireless devices can be easily attacked by jammers during transmission, which is a potential security threat for wireless communications. Active reconfigurable intelligent surface (RIS) attracts considerable attention and is expected to be employed in antijamming systems for secure transmission to significantly enhance the antijamming performance. However, active RIS introduces external power load, which increases the complexity of hardware and restricts the flexible deployment of active RIS. To overcome these drawbacks, we design an innovative self-sustainable structure in this article, where the active RIS is energized by harvesting energy from base station signals through the time dividing based simultaneous wireless information and power transfer scheme. Based on the above structure, we develop the BS harvesting scheme based on joint transmit and reflecting beamforming with the aim of maximizing the achievable rate of active RIS-assisted system, where the alternating optimization algorithm based on stochastic successive convex approximation tackles the nonconvex optimization problem in the scheme. Simulation results verified the effectiveness of our developed BS harvesting scheme, which can attain higher antijamming performance than other schemes when given the same maximum transmit power.
{"title":"Self-Sustainable Active Reconfigurable Intelligent Surfaces for Antijamming in Wireless Communications","authors":"Yang Cao;Wenchi Cheng;Jingqing Wang;Wei Zhang","doi":"10.1109/JSYST.2024.3470133","DOIUrl":"https://doi.org/10.1109/JSYST.2024.3470133","url":null,"abstract":"Wireless devices can be easily attacked by jammers during transmission, which is a potential security threat for wireless communications. Active reconfigurable intelligent surface (RIS) attracts considerable attention and is expected to be employed in antijamming systems for secure transmission to significantly enhance the antijamming performance. However, active RIS introduces external power load, which increases the complexity of hardware and restricts the flexible deployment of active RIS. To overcome these drawbacks, we design an innovative self-sustainable structure in this article, where the active RIS is energized by harvesting energy from base station signals through the time dividing based simultaneous wireless information and power transfer scheme. Based on the above structure, we develop the BS harvesting scheme based on joint transmit and reflecting beamforming with the aim of maximizing the achievable rate of active RIS-assisted system, where the alternating optimization algorithm based on stochastic successive convex approximation tackles the nonconvex optimization problem in the scheme. Simulation results verified the effectiveness of our developed BS harvesting scheme, which can attain higher antijamming performance than other schemes when given the same maximum transmit power.","PeriodicalId":55017,"journal":{"name":"IEEE Systems Journal","volume":"18 4","pages":"2133-2144"},"PeriodicalIF":4.0,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142777901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Recent advancements in autonomous aerial vehicles (AAVs) and visible light communication (VLC) can revolutionize indoor networks in the era of 6G, offering benefits, such as high accuracy, cost-effectiveness, power efficiency, and improved security. However, VLC-enabled indoor networks face several deployment challenges, including line-of-sight disruptions caused by dynamic obstacles, such as human obstacles and UAVs operating within an indoor area. These dynamic obstacles in the 3-D space can lead to a nonuniform distribution of the received power across the indoor area, adversely impacting the quality of service for indoor users. Therefore, it is crucial to analyze the performance of VLC-enabled indoor networks in the presence of dynamic blockages. This analysis is essential to effectively mitigate the impact of dynamic obstacles and enhance the performance and reliability of indoor networks. This letter provides a performance analysis of VLC-enabled indoor networks for multiple light-emitting-diode configurations in the presence of various blockages, where the blockages (both humans and UAVs) can pause during movement for different pause times. Based on the provided analysis, we develop a model to calculate the blockage probability in indoor networks, and the bit-error-rate performance with varying blockage density is analyzed.
{"title":"Characterization of Dynamic Blockages for VLC-Enabled Indoor Industrial Networks","authors":"Anand Singh;Haythem Bany Salameh;Moussa Ayyash;Hany Elagla","doi":"10.1109/JSYST.2024.3470324","DOIUrl":"https://doi.org/10.1109/JSYST.2024.3470324","url":null,"abstract":"Recent advancements in autonomous aerial vehicles (AAVs) and visible light communication (VLC) can revolutionize indoor networks in the era of 6G, offering benefits, such as high accuracy, cost-effectiveness, power efficiency, and improved security. However, VLC-enabled indoor networks face several deployment challenges, including line-of-sight disruptions caused by dynamic obstacles, such as human obstacles and UAVs operating within an indoor area. These dynamic obstacles in the 3-D space can lead to a nonuniform distribution of the received power across the indoor area, adversely impacting the quality of service for indoor users. Therefore, it is crucial to analyze the performance of VLC-enabled indoor networks in the presence of dynamic blockages. This analysis is essential to effectively mitigate the impact of dynamic obstacles and enhance the performance and reliability of indoor networks. This letter provides a performance analysis of VLC-enabled indoor networks for multiple light-emitting-diode configurations in the presence of various blockages, where the blockages (both humans and UAVs) can pause during movement for different pause times. Based on the provided analysis, we develop a model to calculate the blockage probability in indoor networks, and the bit-error-rate performance with varying blockage density is analyzed.","PeriodicalId":55017,"journal":{"name":"IEEE Systems Journal","volume":"18 4","pages":"2173-2176"},"PeriodicalIF":4.0,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142777958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-10-04DOI: 10.1109/JSYST.2024.3465391
Marcos Borges;Lincoln Rocha;Paulo Henrique Mendes Maia;Rodrigo Pereira dos Santos
Establishing interoperability links is a significant challenge in systems-of-information systems (SoIS) engineering. Even with constituent systems (CS) interfaces documentation, achieving such links is a difficult, time-consuming, and error-prone task that requires attention from CS developers, especially if it is performed manually. In order to contribute to this task, we propose Agape, a semiautomatic method using syntactic similarity analysis of API attributes to identify potential CS connection points. We implemented the AgapeTool tool based on the method and performed two-fold evaluations. In the preliminary evaluation, we executed a controlled experiment to evaluate the performance of AgapeTool and empirically define the best similarity algorithms and thresholds for the task of identifying connection points between two well known API. In the evaluation, we use AgapeTool in two cases involving four CS API from a SoIS of a global computer manufacturer. Then, we conducted semistructured interviews with five experienced developers of the target SoIS to evaluate the outcomes. In practice, the results reveal that AgapeTool is effective in both environments, and API syntactic similarity analysis is efficient for identifying CS interoperability links. From a research point, the combination of syntactic and semantic analyzes looks promising for more accurate and reliable results.
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