Search Results for author: Hirley Alves

Found 25 papers, 5 papers with code

Conservative and Risk-Aware Offline Multi-Agent Reinforcement Learning for Digital Twins

no code implementations13 Feb 2024 Eslam Eldeeb, Houssem Sifaou, Osvaldo Simeone, Mohammad Shehab, Hirley Alves

Digital twin (DT) platforms are increasingly regarded as a promising technology for controlling, optimizing, and monitoring complex engineering systems such as next-generation wireless networks.

Multi-agent Reinforcement Learning Q-Learning +1

Traffic Learning and Proactive UAV Trajectory Planning for Data Uplink in Markovian IoT Models

no code implementations24 Jan 2024 Eslam Eldeeb, Mohammad Shehab, Hirley Alves

In this paper, we present a novel learning-based framework that estimates the traffic arrival of IoT devices based on Markovian events.

Management Scheduling +1

Energy-Efficient Analog Beamforming for RF-WET with Charging Time Constraint

1 code implementation9 Nov 2023 Osmel Martínez Rosabal, Onel L. Alcaraz López, Hirley Alves

Internet of Things (IoT) sustainability may hinge on radio frequency wireless energy transfer (RF-WET).

Energy Efficiency Optimization for Subterranean LoRaWAN Using A Reinforcement Learning Approach: A Direct-to-Satellite Scenario

no code implementations3 Nov 2023 Kaiqiang Lin, Muhammad Asad Ullah, Hirley Alves, Konstantin Mikhaylov, Tong Hao

The integration of subterranean LoRaWAN and non-terrestrial networks (NTN) delivers substantial economic and societal benefits in remote agriculture and disaster rescue operations.

Reinforcement Learning (RL)

Age Minimization in Massive IoT via UAV Swarm: A Multi-agent Reinforcement Learning Approach

no code implementations26 Sep 2023 Eslam Eldeeb, Mohammad Shehab, Hirley Alves

In this paper, we apply multi-agent deep reinforcement learning to address the high-dimensional problem that results from deploying a swarm of UAVs to collect fresh information from IoT devices.

Multi-agent Reinforcement Learning reinforcement-learning

Joint Activity Detection and Channel Estimation for Clustered Massive Machine Type Communications

no code implementations4 May 2023 Leatile Marata, Onel Luis Alcaraz López, Andreas Hauptmann, Hamza Djelouat, Hirley Alves

Compressed sensing multi-user detection (CS-MUD) algorithms play a key role in optimizing grant-free (GF) non-orthogonal multiple access (NOMA) for massive machine-type communications (mMTC).

Action Detection Activity Detection

LoRaWAN-enabled Smart Campus: The Dataset and a People Counter Use Case

1 code implementation26 Apr 2023 Eslam Eldeeb, Hirley Alves

This paper presents a detailed description of the Smart Campus dataset based on LoRaWAN.

Multi-UAV Path Learning for Age and Power Optimization in IoT with UAV Battery Recharge

no code implementations9 Jan 2023 Eslam Eldeeb, Jean Michel de Souza Sant'Ana, Dian Echevarría Pérez, Mohammad Shehab, Nurul Huda Mahmood, Hirley Alves

We formulate an optimization problem to jointly plan the UAVs' trajectory, while minimizing the AoI of the received messages and the devices' energy consumption.

Joint Coherent and Non-Coherent Detection and Decoding Techniques for Heterogeneous Networks

no code implementations27 Sep 2022 Leatile Marata, Onel Luis Alcaraz López, Hamza Djelouat, Markus Leinonen, Hirley Alves, Markku Juntti

Cellular networks that are traditionally designed for human-type communication (HTC) have the potential to provide cost effective connectivity to machine-type communication (MTC).

A Learning-Based Trajectory Planning of Multiple UAVs for AoI Minimization in IoT Networks

no code implementations13 Sep 2022 Eslam Eldeeb, Dian Echevarría Pérez, Jean Michel de Souza Sant'Ana, Mohammad Shehab, Nurul Huda Mahmood, Hirley Alves, Matti Latva-aho

Many emerging Internet of Things (IoT) applications rely on information collected by sensor nodes where the freshness of information is an important criterion.

Trajectory Planning

Statistical Analysis of Received Signal Strength in Industrial IoT Distributed Massive MIMO Systems

no code implementations2 May 2022 Eduardo Noboro Tominaga, Onel Luiz Alcaraz López, Richard Demo Souza, Hirley Alves

The Fifth Generation (5G) of wireless networks introduced native support for Machine-Type Communication (MTC), which is a key enabler for the Internet of Things (IoT) revolution.

User Activity Detection and Channel Estimation of Spatially Correlated Channels via AMP in Massive MTC

no code implementations8 Dec 2021 Hamza Djelouat, Leatile Marata, Markus Leinonen, Hirley Alves, Markku Juntti

This paper addresses the problem of joint user identification and channel estimation (JUICE) for grant-free access in massive machine-type communications (mMTC).

Action Detection Activity Detection

A Learning-Based Fast Uplink Grant for Massive IoT via Support Vector Machines and Long Short-Term Memory

no code implementations2 Aug 2021 Eslam Eldeeb, Mohammad Shehab, Hirley Alves

A Coupled Markov Modulated Poisson Process (CMMPP) traffic model with mixed alarm and regular traffic is applied to compare the proposed FUG allocation to other existing allocation techniques.

Traffic Prediction

Massive Wireless Energy Transfer with Statistical CSI Beamforming

no code implementations15 Jun 2021 Francisco A. Monteiro, Onel L. A. López, Hirley Alves

A paramount benefit of the constrained precoder is the encompassment of fairness in the power allocation to the different clusters.

Fairness Total Energy

Joint Channel Estimation and Device Activity Detection in Heterogeneous Networks

no code implementations27 May 2021 Leatile Marata, Onel Luis Alcaraz López, Eduardo Noboro Tominaga, Hirley Alves

Internet of Things (IoT) has triggered a rapid increase in the number of connected devices and new use cases of wireless communications.

Action Detection Activity Detection

Effective Energy Efficiency of Ultra-reliable Low Latency Communication

no code implementations20 Jan 2021 Mohammad Shehab, Hirley Alves, Eduard A. Jorswieck, Endrit Dosti, Matti Latva-aho

Effective Capacity defines the maximum communication rate subject to a specific delay constraint, while effective energy efficiency (EEE) indicates the ratio between effective capacity and power consumption.

Information Theory Information Theory

Network Slicing for eMBB and mMTC with NOMA and Space Diversity Reception

no code implementations13 Jan 2021 Eduardo Noboro Tominaga, Hirley Alves, Onel Luiz Alcaraz López, Richard Demo Souza, João Luiz Rebelatto, Matti Latva-aho

In this work we study the coexistence in the same Radio Access Network (RAN) of two generic services present in the Fifth Generation (5G) of wireless communication systems: enhanced Mobile BroadBand (eMBB) and massive Machine-Type Communications (mMTC).

On the SIR Meta Distribution in Massive MTCNetworks with Scheduling and Data Aggregation

no code implementations13 Jan 2021 Nelson J. Mayedo Rodríguez, Onel L. Alcaraz López, Hirley Alves, Matti Latva-aho

Data aggregation is an efficient approach to handle the congestion introduced by a massive number of machine type devices (MTDs).

Scheduling

Non-Orthogonal Multiple Access and Network Slicing: Scalable Coexistence of eMBB and URLLC

no code implementations12 Jan 2021 Eduardo Noboro Tominaga, Hirley Alves, Richard Demo Souza, João Luiz Rebelatto, Matti Latva-aho

The diverse requirements of these services in terms of data-rates, number of connected devices, latency and reliability can lead to a sub-optimal use of the 5G network, thus network slicing is proposed as a solution that creates customized slices of the network specifically designed to meet the requirements of each service.

On the Optimal Deployment of Power Beacons for Massive Wireless Energy Transfer

1 code implementation8 Dec 2020 Osmel Martínez Rosabal, Onel L. Alcaraz López, Hirley Alves, Samuel Montejo-Sánchez, Matti Latva-aho

In this paper, we investigate the optimal deployment of PBs that guarantees a network-wide energy outage constraint.

On CSI-free Multi-Antenna Schemes for Massive RF Wireless Energy Transfer

no code implementations6 Feb 2020 Onel L. A. López, Samuel Montejo-Sánchez, Richard D. Souza, Hirley Alves, Constantinos B. Papadias

We characterize the distribution of the provided energy under correlated Rician fading for each scheme and find out that while AA-IS and SA cannot take advantage of the multiple antennas to improve the average provided energy, its dispersion can be significantly reduced.

Hybrid Coded Replication in LoRa Networks

1 code implementation9 Jan 2020 Jean Michel de Souza Sant'Ana, Arliones Hoeller, Richard Demo Souza, Samuel Montejo-Sánchez, Hirley Alves, Mario de Noronha Neto

Low Power Wide Area Networks (LPWAN) are wireless connectivity solutions for Internet-of-Things (IoT) applications, including industrial automation.

Networking and Internet Architecture Signal Processing

Storage Management in Modern Electricity Power Grids

1 code implementation2 Dec 2016 Pedro H. J. Nardelli, Hirley Alves

This letter introduces a method to manage energy storage in electricity grids.

Systems and Control

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