Shannon Wireless’ Post

This paper studies the joint design problem of an event-triggered control and an energy-efficient resource allocation in a #fifth #generation (#5G) wireless network. The authors formally state the problem as a multi-objective optimization one, aiming to minimize the number of updates on the actuators' input and the power consumption in the downlink transmission. To address the problem, they propose a model-free hierarchical #reinforcement #learning (#RL) approach with uniformly ultimate boundedness stability guarantee that learns four policies simultaneously. ----Atefeh Termehchi, @Mehdi Rasti More details can be found at this link: https://lnkd.in/d6tTGdyc

In this work, the authors consider multiple heterogeneous #networked #control #systems (#NCSs) that transmit their system state over a shared physical wireless channel to a gateway node. They conduct a comprehensive experimental study on selected MAC protocols using software-defined radios with #state-#of-#the-#art (#SotA) solutions designed to increase information freshness and control performance. As a significant improvement over the SotA, they propose a novel contention-free algorithm that is able to outperform the existing solutions by combining their strengths in one protocol. In addition, they propose a new metric called normalized mean squared error that maps the age of information to a dimensionless quantity that captures the expected value of a control system’s next transmission. They demonstrate its adoption and effectiveness for wireless resource scheduling in a case study involving multiple inverted pendulums. ---- Onur Ayan, Polina Kutsevol, Hasan Yağiz Özkan, Wolfgang Kellerer More details can be found at this link: https://lnkd.in/eBkE7Zvs

This paper proposes algorithms to minimize the #energy #consumption in #millimeter #wave/ #terahertz #multi-#user downlink communication systems. To ensure coverage in blockage-vulnerable high frequency systems, the authors consider #cooperative #rate-#splitting (#CRS) and transmission over multiple time blocks, where via CRS, multiple users cooperate to assist a blocked user. Moreover, they show that transmission over multiple #time #blocks provides benefits through smart resource allocation. They first propose a communication framework named #improved #distinct #extraction-#based #CRS (#iDeCRS) that utilizes the benefits of rate-splitting. With their transmission framework, they derive a #performance #benchmark assuming genie #channel #state #information (#CSI), i.e., the channels of the present and future time blocks are known, denoted as GENIE. Using the results from GENIE, they derive a novel #efficiency #constrained #optimization (#ECO) algorithm assuming instantaneous CSI. In addition, a simple but #effective #even #data #transmission (#EDT) algorithm that promotes steady transmission along the time blocks is proposed. ----Hyesang Cho, Junil Choi More details can be found at this link: https://lnkd.in/gpgW6VEx

This paper focuses on the issues in the context of #uplink #networks, relying on #power-#domain #nonorthogonal #multiple #access (#NOMA). Moreover, the degrading effect of imperfect #successive #interference #cancellation (#SIC), when randomly deployed multiple mobile terminals communicate with a single #base #station (#BS) is considered. The system performance is measured by means of outage probability, error probability, ergodic rate, throughput, energy efficiency, and spectral efficiency. Analytical, asymptotic, and computer simulation results demonstrate that CEE causes system coding gain losses for low #signal-#to-#noise #ratio (#SNR) while the disruptive effects of #channel #estimation #error (#CEE) become negligible in the high SNR. ----@Volkan Özduran, MohammadAli Mohammadi, Nikolaos Nomikos, Imran Shafique Ansari, Panagiotis Trakadas More details can be found at this link: https://lnkd.in/gr8JF8AG

This work proposes a scalable #access #point (#AP) selection framework based on a competitive mechanism that operates in two stages. Initially, the user equipment (#UE) connects to an intermediate AP cluster, where a matched-decision among the APs and UEs establishes the best connection in terms of #large-#scale #fading and prevents UEs from being dropped. Then, UEs can expand their AP clusters by connecting to more APs. The authors compare their method with baseline solutions considering different precoding techniques in centralized and distributed network implementations. They propose three strategies to fine-tune the AP clusters, reducing the number of UEs per AP without compromising the #spectral #efficiency (#SE) or improving #energy #efficiency. ---- Marx Freitas, Daynara Souza, Gilvan Borges, André Mendes Cavalcante, Prof. Daniel Benevides da Costa, Maria Valéria Marquezini, PhD, Igor Almeida, Roberto Rodrigues, joao weyl More details can be found at this link: https://lnkd.in/eqhTZP29

In this paper, the authors propose algorithms to minimize the energy consumption in millimeter wave/terahertz multi-user downlink communication systems. To ensure coverage in blockage-vulnerable high frequency systems, they consider #cooperative #rate-#splitting (#CRS) and transmission over multiple time blocks, where via CRS, multiple users cooperate to assist a blocked user. Moreover, they show that transmission over multiple time blocks provides benefits through smart resource allocation. They first propose a communication framework named #improved #distinct #extraction-#based #CRS (#iDeCRS) that utilizes the benefits of rate-splitting. With their transmission framework, they derive a performance benchmark assuming genie #channel #state #information (#CSI), i.e., the channels of the present and future time blocks are known, denoted as GENIE. Using the results from GENIE, they derive a novel #efficiency #constrained #optimization (#ECO) algorithm assuming instantaneous CSI. In addition, a simple but effective #even #data #transmission (#EDT) algorithm that promotes steady transmission along the time blocks is proposed. ---- Hyesang Cho, Junil Choi More details can be found at this link: https://lnkd.in/duv85z3a

This paper proposes a semi-centralized resource allocation scheme for #Integrated #Access #and #Backhaul (#IAB) networks, designed to be flexible, with low complexity, and compliant with the #3rd #Generation #Partnership #Project (#3GPP) #Integrated IAB specifications. The authors develop a version of the #Maximum #Weighted #Matching (#MWM) problem that can be applied to a spanning tree that represents the IAB network and whose complexity is linear in the number of IAB nodes. The proposed solution is compared with state-of-the-art distributed approaches through end-to-end, full-stack system-level simulations with a 3GPP-compliant channel model, protocol stack, and a diverse set of user applications. ----Matteo Pagin,Tommaso Zugno, Michele Polese More details can be found at this link: https://lnkd.in/deZUsipu

This paper proposes a system that uses a #reconfigurable #intelligent #surface (#RIS) to assist a half-duplex cooperative rate-splitting multiple access (#C-#RSMA) wireless network. With the goal of minimizing total energy consumption, an optimization framework is presented to determine the precoding vectors at the base station, the #common #stream #split, the relay device's transmit power, the time slot allocation, and the passive beamforming at the RIS. ---- Shreya Khisa, Mohamed Elhattab, Chadi Assi, Sanaa Sharafeddine More details can be found at this link: https://lnkd.in/gs7ukwfY

This paper investigates #wireless #relay #networks where the power is transmitted through the air and the relays and sources have multiple antennas. The authors propose two new communication schemes that combine aspects of #time #switching and #self-#energy #recycling. Specifically, the paper focuses on maximizing the instantaneous transmission rate by designing algorithms for optimizing the beamforming and wireless power transfer times. ---- Georgios Ropokis More details can be found at this link: https://lnkd.in/gAh7qUYU

This paper examines how to best choose between #5G #New #Radio (#NR) and #WiFi networks to maximize overall network throughput, while meeting requirements on how often important users can connect and how often less important users are sent to WiFi. A #Constrained #Markov #Decision #Process (#CMDP) is formulated accounting for how the network changes over time in random ways. The authors also develop some practical methods for choosing the network connection on the fly. These online heuristics can be used even without knowing the precise patterns of how the network will behave over time. ---- Arghyadip Roy More details can be found at this link: https://lnkd.in/g93JgA_n