I am delighted to announce that our paper entitled "Multi-Agent DRL-Based Energy Harvesting for Freshness of Data in UAV-Assisted Wireless Sensor Networks" has been published in the IEEE Transactions on Network and Service Management (Early Access) (Q1,IF=4.7). First of all, I would like to thank one of our co-authors and my dear friends, Dr. Mohammed Seid, Ph.D and Nahom Abishu Hayla, for their countless contributions to our paper. Congratulations to all authors, Prof. Supeng Leng, Dr. Maged Refat , Prof. Aiman Erbad, and Prof. Mohsen Guizani. We have introduced a novel multi-access edge computing (MEC)-integrated UAV-supported wireless sensor network (WSN) with a laser technology-based energy harvesting (EH) system that makes the UAV act as a flying energy charger to address these issues. This work aims to minimize the age of information (AoI) and improve energy efficiency by jointly optimizing the UAV trajectories, EH, task scheduling, and data offloading. The joint optimization problem is formulated as a Markov decision process (MDP) and then transformed into a stochastic game model to handle the complexity and dynamics of the environment. We employ a multi-agent deep Q-network (MADQN) algorithm to solve the formulated optimization problem. With the MADQN algorithm, UAVs can determine the best data collection and EH decisions to minimize their energy consumption and efficiently collect data from multiple SNs, leading to reduced AoI and improved energy efficiency.
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This study proposes a #minimum-#energy #operational planning problem for multiple #unmanned #aerial #vehicles (#UAVs) conducting a #cooperative #multihop #data-#gathering #mission. A multi-UAV ad hoc network collects data from multiple sources and transmits them to a #ground #base #station. The proposed mixed-integer nonlinear programming formulation simultaneously determines #cooperative #task #allocation, #data #gathering #schedule, #dynamic #aerial #data #flow, and UAV trajectories to minimize operational energy consumption. A hierarchical two-phase solution procedure that decomposes the original problem into a series of less complex problems and solves them efficiently is developed.----Uihwan Choi, Chaehwan Moon, @Jaemyung Ahn More details can be found at this link: https://lnkd.in/g7f9sjjj
Energy Minimization of Dynamic Multi-UAV Communication Network for Cooperative MultiHop Data Gathering
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This paper presents a secure and jamming-resistant green channel-assignment algorithm designed for #indoor #uplink communication in #MIMO-and #Cognitive #Radio (#CR)-enabled #Open #Radio #Access #Network (#O-#RAN)-supported #Unmanned #Aerial #Vehicles (#UAVs) networks. The proposed algorithm aims to maximize served transmissions with minimal total transmission power, exploiting MIMO, CR adabtability, and jamming awareness. Leveraging the #Lagrangian #technique, a closed-form formula for #per-#antenna #power #allocation is derived to solve the power minimization problem for each #UAV over the available channels. Using the obtained per-UAV powers on idle channels, a #power-#efficient #batch-#based #channel-#assignment problem is formulated, presented as unimodular binary-linear programming solvable through polynomial-time linear programming. ----Haythem A Bany Salameh, @Haitham Obeidollah, Moayad Aloqaily More details can be found at this link: https://lnkd.in/gceYxzB4
Secure Batch-Based Resource Allocation for Green Cognitive MIMO Indoor Flying Networks
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#Reconfigurable #intelligent #surfaces (#RIS) constitute a revolutionary technique of beneficially reconfiguring the smart radio environment. However, despite the fact that wireless propagation is of time-varying nature, most of the existing RIS contributions focus on time-invariant scenarios for the following reasons. Firstly , it becomes impractical to instantaneously feed back the control signal based on the doubly selective #non-#line-#of-#sight (#NLoS) fading scenario. Secondly , channel estimation conceived for the high-mobility and high-dimensional RIS-assisted links has to take into account the #spatial-#domain (#SD), #time-#domain (#TD), and #frequency-#domain (#FD) correlations imposed by the angle-of-arrival/departure (AoA/AoD), the Doppler and the #orthogonal #frequency-#division #multiplexing (#OFDM) operations, respectively, where none of the existing solutions can be directly applied. Thirdly , it is far from trivial to maximize the NLoS channel powers on all subcarriers by a common set of RIS reflecting coefficients. Fourthly , in the face of double selectivity, it becomes inevitable to encounter either #inter-#symbol #interference (#ISI) or #inter-#channel #interference (#ICI) during the signal detection in the TD or in the FD, respectively. Against this background, firstly , the authors focus their attention on line-of-sight (LoS) dominated #unmanned #aerial #vehicle (#UAV) scenarios. Secondly , they conceive new #minimum #mean #squared #error (#MMSE) channel estimation methods for doubly selective fading, which perodically transmit pilot symbols embedded into the TD and FD over the SD in order to beneficially exploit the correlations in the three domains. Thirdly , the RIS coefficients are optimized by a low-complexity algorithm based on the LoS representation of the end-to-end system model. Fourthly , tailor-made interference cancallation techniques are devised for improving the signal detection both in the FD and in the TD. ---- @Chao Xu, Jiancheng An, @Tong Bai, @Luping Xiang, @Shinya Sugiura, @Prof Rob Maunder, @Lie-Liang Yang, @Lajos Hanzo More details can be found at this link: https://lnkd.in/d2uEcAkh
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#Reconfigurable #intelligent #surfaces (#RIS) constitute a revolutionary technique of beneficially reconfiguring the smart radio environment. However, despite the fact that wireless propagation is of time-varying nature, most of the existing RIS contributions focus on time-invariant scenarios for the following reasons. Firstly , it becomes impractical to instantaneously feed back the control signal based on the doubly selective #non-#line-#of-#sight (#NLoS) fading scenario. Secondly , channel estimation conceived for the high-mobility and high-dimensional RIS-assisted links has to take into account the #spatial-#domain (#SD), #time-#domain (#TD), and #frequency-#domain (#FD) correlations imposed by the angle-of-arrival/departure (AoA/AoD), the Doppler and the #orthogonal #frequency-#division #multiplexing (#OFDM) operations, respectively, where none of the existing solutions can be directly applied. Thirdly , it is far from trivial to maximize the NLoS channel powers on all subcarriers by a common set of RIS reflecting coefficients. Fourthly , in the face of double selectivity, it becomes inevitable to encounter either #inter-#symbol #interference (#ISI) or #inter-#channel #interference (#ICI) during the signal detection in the TD or in the FD, respectively. Against this background, firstly , the authors focus their attention on line-of-sight (LoS) dominated #unmanned #aerial #vehicle (#UAV) scenarios. Secondly , they conceive new #minimum #mean #squared #error (#MMSE) channel estimation methods for doubly selective fading, which perodically transmit pilot symbols embedded into the TD and FD over the SD in order to beneficially exploit the correlations in the three domains. Thirdly , the RIS coefficients are optimized by a low-complexity algorithm based on the LoS representation of the end-to-end system model. Fourthly , tailor-made interference cancallation techniques are devised for improving the signal detection both in the FD and in the TD. ---- Chao Xu, Jiancheng An, Tong Bai, Luping Xiang, Shinya Sugiura, Prof Rob Maunder, Lie-Liang Yang, Lajos Hanzo More details can be found at this link: https://lnkd.in/d2uEcAkh
Reconfigurable Intelligent Surface Assisted Multi-Carrier Wireless Systems for Doubly Selective High-Mobility Ricean Channels
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#Reconfigurable #intelligent #surfaces (#RIS) constitute a revolutionary technique of beneficially reconfiguring the smart radio environment. However, despite the fact that wireless propagation is of time-varying nature, most of the existing RIS contributions focus on time-invariant scenarios for the following reasons. Firstly , it becomes impractical to instantaneously feed back the control signal based on the doubly selective #non-#line-#of-#sight (#NLoS) fading scenario. Secondly , channel estimation conceived for the high-mobility and high-dimensional RIS-assisted links has to take into account the #spatial-#domain (#SD), #time-#domain (#TD), and #frequency-#domain (#FD) correlations imposed by the #angle-#of-#arrival/ #departure (#AoA/ #AoD), the Doppler and the #orthogonal #frequency-#division #multiplexing (#OFDM) operations, respectively, where none of the existing solutions can be directly applied. Thirdly , it is far from trivial to maximize the NLoS channel powers on all subcarriers by a common set of RIS reflecting coefficients. Fourthly , in the face of double selectivity, it becomes inevitable to encounter either #inter-#symbol #interference (#ISI) or #inter-#channel #interference (#ICI) during the signal detection in the TD or in the FD, respectively. Against this background, firstly , the authors focus their attention on #line-#of-#sight (#LoS) dominated #unmanned #aerial #vehicle (#UAV) scenarios. Secondly , they conceive new #minimum #mean #squared #error (#MMSE) channel estimation methods for doubly selective fading, which perodically transmit pilot symbols embedded into the TD and FD over the SD in order to beneficially exploit the correlations in the three domains. Thirdly, the RIS coefficients are optimized by a low-complexity algorithm based on the LoS representation of the end-to-end system model. Fourthly , tailor-made interference cancallation techniques are devised for improving the signal detection both in the FD and in the TD. ---- Chao Xu, Jiancheng An, Tong Bai, Luping Xiang, Shinya Sugiura, Prof Rob Maunder, Lie-Liang Yang, Lajos Hanzo More details can be found at this link: https://lnkd.in/d2uEcAkh
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Check out our latest scientific publication titled "On the Use of Ultra-WideBand-Based Augmentation for Precision Maneuvering"! In this paper, we address the limitations of conventional Global Navigation Satellite Systems (GNSS) integrated with Inertial Measurement Units (IMU) in meeting the demands of precision maneuvering. Our research presents a novel approach utilizing ultra-wideband (UWB) technology to augment the traditional GNSS+IMU system, overcoming accuracy and availability constraints. By harnessing the power of UWB technology, our low-cost UWB-augmented GNSS+IMU system not only meets performance standards but also offers seamless navigation across indoor and outdoor environments. Our comprehensive testing and analysis in automotive and maritime sectors validate the system's reliability and resilience, making it an ideal solution for precise navigation. Gorka De Miguel Aramburu Nerea Fernández Berrueta Iñigo Adin Jaizki Mendizabal Samper Joanes Aizpuru Zinkunegi Ceit Research Center
On the Use of Ultra-WideBand-Based Augmentation for Precision Maneuvering
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In this study, the authors propose an innovative #Deep #Reinforcement #Learning (#DRL) agent based on #Proximal #Policy #Optimization (#PPO) to improve the #Energy #Efficiency (#EE) while considering #far-#near #fairness (#FNF) in #non-#orthogonal #multiple #access (#NOMA)-#unmanned #aerial #vehicle (#UAV) networks. This agent is designed to simultaneously control dynamic factors such as UAV 3D trajectory, downlink transmit power, #internet #of #things (#IoT) nodes association, and #power #allocation (#PA). ---- Benmeziane GHOMRI, Mohammed Yassine Bendimerad, Fethi Tarik Bendimerad More details can be found at this link: https://lnkd.in/eJ---izf
DRL-Driven Optimization for Energy Efficiency and Fairness in NOMA-UAV Networks
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#Reconfigurable #intelligent #surfaces (#RIS) constitute a revolutionary technique of beneficially reconfiguring the smart radio environment. However, despite the fact that wireless propagation is of time-varying nature, most of the existing RIS contributions focus on time-invariant scenarios for the following reasons. Firstly , it becomes impractical to instantaneously feed back the control signal based on the doubly selective #non-#line-#of-#sight (#NLoS) fading scenario. Secondly , channel estimation conceived for the high-mobility and high-dimensional RIS-assisted links has to take into account the #spatial-#domain (#SD), #time-#domain (#TD), and #frequency-#domain (#FD) correlations imposed by the angle-of-arrival/departure (#AoA/#AoD), the Doppler and the #orthogonal #frequency-#division #multiplexing (#OFDM) operations, respectively, where none of the existing solutions can be directly applied. Thirdly , it is far from trivial to maximize the NLoS channel powers on all subcarriers by a common set of RIS reflecting coefficients. Fourthly , in the face of double selectivity, it becomes inevitable to encounter either #inter-#symbol #interference (#ISI) or #inter-#channel #interference (#ICI) during the signal detection in the TD or in the FD, respectively. Against this background, firstly , the authors focus their attention on #line-#of-#sight (#LoS) dominated #unmanned #aerial #vehicle (#UAV) scenarios. Secondly , they conceive new #minimum #mean #squared #error (#MMSE) channel estimation methods for doubly selective fading, which perodically transmit pilot symbols embedded into the TD and FD over the SD in order to beneficially exploit the correlations in the three domains. Thirdly , the RIS coefficients are optimized by a low-complexity algorithm based on the LoS representation of the end-to-end system model. Fourthly , tailor-made interference cancallation techniques are devised for improving the signal detection both in the FD and in the TD. ---- Chao Xu, Jiancheng An, Tong Bai, Luping Xiang, Shinya Sugiura, Prof Rob Maunder, Lie-Liang Yang, Lajos Hanzo More details can be found at this link: https://lnkd.in/d2uEcAkh
Reconfigurable Intelligent Surface Assisted Multi-Carrier Wireless Systems for Doubly Selective High-Mobility Ricean Channels
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Excited to share our latest publication in the Journal of Applied Geodesy! We investigated the use of geodetic sensors, like robotic total stations and laser trackers, for generating reference trajectories for mobile multi-sensor systems (MSS). Our study addresses synchronization challenges for a unified temporal reference, crucial for MSS development and validation. Check out our open-access article for insights on improving localization quality. Read it here: https://lnkd.in/eZHStnWX #Geodesy #Validation #Synchronization #MultiSensorSystem #RoboticTotalStation #LaserTracker #ReferenceTrajectory #GIH #LUH
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Exciting News! My paper, "Innovative AI-Enhanced Ice Detection System Using Graphene-Based Sensors for Enhanced Aviation Safety and Efficiency," has just been published in Nanomaterials. 🎉 You can read it here: https://lnkd.in/eb8YzMrq
Innovative AI-Enhanced Ice Detection System Using Graphene-Based Sensors for Enhanced Aviation Safety and Efficiency
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Founder of SmythOS.com | AI Multi-Agent Orchestration ▶️
3moFascinating UAV-enabled WSN optimization. MDP formulation and MADQN algorithm handling complexities sounds ingenious. Kudos on the impactful Q1 IEEE publication.