Article
Computer Science, Information Systems
Hojung Lee, Hyowoon Seo, Wan Choi
Summary: This article addresses the importance of building effective and reliable distributed consensus mechanisms over wireless networks, given the paradigm shift in Internet of Things networks. Two wireless consensus mechanisms, namely gossip-broadcasting-based RC (GB-RC) and cooperative-broadcast-based electoral-college consensus (CB-EC), are proposed and analyzed mathematically in terms of consensus latency and resiliency against faulty nodes. The GB-RC outperforms the conventional RC, while the CB-EC reduces consensus latency at the cost of stochastic resiliency.
IEEE INTERNET OF THINGS JOURNAL
(2022)
Article
Computer Science, Information Systems
Abhishek Sinha, Eytan Modiano
Summary: The study focuses on efficient packet dissemination in wireless networks, proposing a dynamic policy that achieves network broadcast capacity through transforming the network, finding optimal policies, and using sample-path arguments for verification. Additionally, the study proves the NP-completeness of finite-horizon broadcasting problem and demonstrates the efficacy of the proposed broadcast policy in achieving full broadcast capacity with low delay through illustrative simulation results.
IEEE TRANSACTIONS ON MOBILE COMPUTING
(2021)
Article
Engineering, Electrical & Electronic
Yi Chen, Chong Han
Summary: Directional antennas and beamforming techniques play a crucial role in enhancing transmission gain in wireless networks. Traditional beamforming gain models often overlook channel properties, resulting in inaccurate system-level network analysis. A proposed general beamforming gain model, particularly effective for millimeter-wave wideband systems, addresses these limitations and provides more accurate results.
IEEE TRANSACTIONS ON COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Rufino Cabrera, Orlando Landrove, Eneko Iradier, Pablo Angueira, Jon Montalban
Summary: Terrestrial broadcasting has been outdated due to its lack of flexibility in embracing new use cases on the IP media delivery landscape. Recent standardization efforts have incorporated broadcasting technologies into efficient communication systems and integrated IP-based solutions, but the development of a Broadcasting Core Network (BCN) is still needed for integrating terrestrial broadcast systems as IP multimedia multicast delivery choices. This article explains how 5G Core developments drive the standardization of BCN and identifies the challenges the broadcasting industry will face in integrating envisioned services, ending with a description of a prototype developed for BCN standardization.
IEEE COMMUNICATIONS MAGAZINE
(2023)
Article
Engineering, Electrical & Electronic
Jorge F. Schmidt, Udo Schilcher, Mahin K. Atiq, Christian Bettstetter
Summary: This article introduces and evaluates a technique for predicting interference levels in wireless networks. A recursive predictor is designed to estimate future interference values by filtering measured interference. Results show a good accuracy of predicted values versus true values within relevant time horizons, and the predictor also tends to work well in more general network scenarios.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Computer Science, Hardware & Architecture
Xiangming Zhu, Chunxiao Jiang
Summary: This article investigates the integrated satellite-terrestrial network towards 6G from the perspective of systematic design. It discusses potential integration architectures and proposes a new performance indicator to characterize network performance. By designing the communication system, an integrated satellite-terrestrial network architecture is proposed to achieve high efficient global communication.
IEEE WIRELESS COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
Jin Tao, Quan You, Chao Yang, Zile Li, Liangui Deng, Mian Wu, Ming Luo, Lin Wu, Chao Li, Zichen Liu, Zhixue He, Xi Xiao, Guoxing Zheng, Shaohua Yu
Summary: A bidirectional multichannel optical wireless system enabled by a polarization independent metasurface with coherent modulation and reception is designed and experimentally demonstrated in this study. The system provides exclusive 100 Gbps coherent optical signal transmission to multiusers with their own wavelengths, at a distance of 2 meters and a field of view of 20 degrees x 20 degrees. Additionally, the system supports a 900 Gbps optical broadcasting system. This metasurface assisted optical wireless communication system combines optical coherent communication techniques with the concept of metasurface, reducing system complexity and cost while achieving high transmission capacity and opening new possibilities for high performance optical wireless communications.
Article
Operations Research & Management Science
Tuan Phung-Duc, Kohei Akutsu, Ken'ichi Kawanishi, Osama Salameh, Sabine Wittevrongel
Summary: This paper explores queueing models for cognitive radio networks incorporating sensing time for SUs, focusing on two retrial queueing models with an unlimited number of sensing SUs where PUs have preemptive priority. The stability conditions are the same for both models, but the model without interruptions when idle channels are available has slightly fewer sensing SUs compared to the model with interruptions.
ANNALS OF OPERATIONS RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Yaqian Zhang, Junyu Liu, Min Sheng, Yan Shi, Jiandong Li
Summary: In this study, the performance of small cell networks with wireless backhaul in terms of network spatial throughput is comprehensively investigated. It is found that over-provision of backhaul can lead to degradation of network performance, and a joint optimization of base station and gateway densities is proposed to improve network spatial throughput.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Computer Science, Information Systems
Rafael Valente da Silva, Jinho Choi, Jihong Park, Glauber Brante, Richard Demo Souza
Summary: This paper proposes an optimal method for allocating wireless resources in a multi-channel ALOHA setup, which outperforms uniform and fully-shared channel allocations in terms of convergence time in large-scale wireless sensor networks involving decentralized machine learning.
IEEE WIRELESS COMMUNICATIONS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Daniel Perez Herrera, Zheng Chen, Erik G. Larsson
Summary: We investigate distributed average consensus in a wireless network with partial communication to minimize the number of transmissions per iteration. Leveraging the broadcast nature of wireless channels, we propose a probabilistic approach to schedule a subset of nodes for broadcasting information in each round. We compare different heuristic methods for assigning node broadcast probabilities under a fixed number of transmissions per round. Additionally, we introduce a pre-compensation method to address the bias between consensus value and average initial values, and suggest potential extensions for our design. Our findings are particularly valuable for developing communication-efficient consensus protocols in wireless environments with limited frequency/time resources.
IEEE SIGNAL PROCESSING LETTERS
(2023)
Article
Mathematics, Applied
Philippe Robert, Gaetan Vignoud
Summary: This paragraph discusses the relationship between long-term changes in neuronal connectivity and learning and memory, exploring the mechanisms of synaptic plasticity and the time evolution of synaptic weight. A new mathematical framework is introduced to study synaptic plasticity associated with different STDP rules. The concept of plasticity kernel is introduced as a key component of plastic neural network models and a subclass with a Markovian formulation is defined and investigated.
SIAM JOURNAL ON APPLIED MATHEMATICS
(2021)
Article
Computer Science, Hardware & Architecture
Setareh Maghsudi, Max Davy
Summary: The concept of the Internet of Things has evolved into the Internet of Everything, incorporating things, humans, data, and processes as its pillars in a heterogeneous large-scale network. Proper modeling of human decision-making is crucial in networking applications, as humans are irrational beings that need to be taken into consideration when developing management, analysis, and optimization policies.
IEEE WIRELESS COMMUNICATIONS
(2021)
Article
Computer Science, Hardware & Architecture
Lina Bariah, Lina Mohjazi, Hanaa Abumarshoud, Bassant Selim, Sami Muhaidat, Mallik Tatipamula, Muhammad Ali Imran, Harald Haas
Summary: Space-air-ground integrated network (SAGIN) is a paradigm shifting architecture that offers large-scale, flexible wireless coverage and seamless connectivity. Integrating reconfigurable intelligent surfaces (RISs) into SAGIN improves communication quality, enables complex interactions, and opens new application possibilities.
Article
Computer Science, Information Systems
Busra Gultekin, Derya Nurcan-Atceken, Aysegul Altin-Kayhan, Huseyin Ugur Yildiz, Bulent Tavli
Summary: This study proposes two mixed integer programming (MIP) models to minimize the energy dissipation of the highest energy-consuming node for broadcasting by utilizing multiple backbones. Performance evaluations reveal that utilizing multiple backbones can significantly reduce the maximum energy dissipation and delay in wireless sensor network broadcasting.
Article
Mathematics, Applied
Ari Arapostathis, Anup Biswas, Subhamay Saha
JOURNAL DE MATHEMATIQUES PURES ET APPLIQUEES
(2019)
Article
Operations Research & Management Science
Ari Arapostathis, Guodong Pang
MATHEMATICS OF OPERATIONS RESEARCH
(2018)
Article
Mathematics, Applied
Ari Arapostathis
NONLINEAR ANALYSIS-THEORY METHODS & APPLICATIONS
(2018)
Article
Statistics & Probability
Ari Arapostathis, Guodong Pang
STOCHASTIC PROCESSES AND THEIR APPLICATIONS
(2019)
Article
Mathematics
Ari Arapostathis, Anup Biswas, Debdip Ganguly
TRANSACTIONS OF THE AMERICAN MATHEMATICAL SOCIETY
(2019)
Article
Statistics & Probability
Ari Arapostathis, Guodong Pang, Nikola Sandric
ANNALS OF APPLIED PROBABILITY
(2019)
Article
Mathematics, Applied
Ari Arapostathis, Anup Biswas, Luis Caffarelli
COMMUNICATIONS IN PARTIAL DIFFERENTIAL EQUATIONS
(2019)
Article
Automation & Control Systems
Ari Arapostathis, Anup Biswas
SIAM JOURNAL ON CONTROL AND OPTIMIZATION
(2020)
Article
Statistics & Probability
Ari Arapostathis, Guodong Pang, Yi Zheng
STOCHASTIC PROCESSES AND THEIR APPLICATIONS
(2020)
Article
Mathematics, Applied
Ari Arapostathis, Anup Biswas, Somnath Pradhan
Summary: This article discusses the ergodic risk-sensitive control problem for a class of multidimensional controlled diffusions on the entire space. The study includes minimization and maximization problems under different stability assumptions and a near-monotone assumption on the running cost. It establishes the convergence of the policy improvement algorithm for these models and presents a more general result on the equilibrium's region of attraction.
PROCEEDINGS OF THE ROYAL SOCIETY OF EDINBURGH SECTION A-MATHEMATICS
(2021)
Article
Operations Research & Management Science
Ari Arapostathis, Hassan Hmedi, Guodong Pang
Summary: The study focuses on the ergodic properties of Markovian multiclass many-server queues, establishing Foster-Lyapunov equations using a Lyapunov function method. It shows that the diffusion process is exponentially ergodic and the invariant probability measures have uniform exponential tails when the spare capacity parameter is positive.
MATHEMATICS OF OPERATIONS RESEARCH
(2021)
Article
Automation & Control Systems
Hassan Hmedi, Johnson Carroll, Ari Arapostathis
Summary: Motivated by distributed control applications, this paper investigates a linear system with Gaussian noise observed by multiple sensors transmitting measurements over a dynamic lossy network. The stationary optimal sensor scheduling policy for the finite horizon, discounted, and long-term average cost problems is characterized, and it is shown that the value iteration algorithm converges to a solution of the average cost problem. The suboptimal policies provided by the rolling horizon truncation of the value iteration also guarantee stability and provide near-optimal average cost. Qualitative characterizations of the multidimensional set of measurement loss rates for stabilizability in a static network are provided, extending earlier results on intermittent observations.
IEEE TRANSACTIONS ON AUTOMATIC CONTROL
(2023)
Article
Management
Hassan Hmedi, Ari Arapostathis, Guodong Pang
Summary: This study introduces a system-wide safety staffing (SWSS) parameter for multiclass multipool networks, providing a method for optimizing capacity fluctuations redistribution and stability control strategies. The explicit form of SWSS is derived using a graph theoretic approach based on Gaussian elimination, with an equivalent characterization for Markovian networks. The research also explores the stability of diffusion-scaled queueing processes under different control policies.
OPERATIONS RESEARCH
(2022)
Article
Automation & Control Systems
Ari Arapostathis, Anup Biswas, Vivek S. Borkar, K. Suresh Kumar
SIAM JOURNAL ON CONTROL AND OPTIMIZATION
(2020)
Article
Automation & Control Systems
Ari Arapostathis, Luis Caffarelli, Guodong Pang, Yi Zheng
SIAM JOURNAL ON CONTROL AND OPTIMIZATION
(2019)