Publications (32)
Semantic-aware Sampling and Transmission in Energy Harvesting Systems: A POMDP Approach
Abolfazl Zakeri, Mohammad Moltafet, Marian Codreanu
We address the problem of real-time remote tracking of a partially observable Markov source in an energy harvesting system with an unreliable communication channel. We consider bot…
Low-Complexity Vector Quantized Compressed Sensing via Deep Neural Networks
Markus Leinonen, Marian Codreanu
Sparse signals, encountered in many wireless and signal acquisition applications, can be acquired via compressed sensing (CS) to reduce computations and transmissions, crucial for…
Joint Sampling and Transmission Policies for Minimizing Cost under AoI Constraints
Emmanouil Fountoulakis, Marian Codreanu, Anthony Ephremides +1
In this work, we consider the problem of jointly minimizing the average cost of sampling and transmitting status updates by users over a wireless channel subject to average Age of…
Real-time Tracking in a Status Update System with an Imperfect Feedback Channel
Saeid Sadeghi Vilni, Abolfazl Zakeri, Mohammad Moltafet +1
We consider a status update system consisting of a finite-state Markov source, an energy-harvesting-enabled transmitter, and a sink. The forward and feedback channels between the t…
Age Dispersion and Higher-Order AoI in Status Update Systems
Mohammad Moltafet, Roy D. Yates, Marian Codreanu +1
We introduce and characterize \emph{age dispersion} as a measure of temporal consistency in status update systems. Age dispersion is defined as the difference between the ages of t…
Status Updating under Partial Battery Knowledge in Energy Harvesting IoT Networks
Mohammad Hatami, Markus Leinonen, Marian Codreanu
We study status updating under inexact knowledge about the battery levels of the energy harvesting sensors in an IoT network, where users make on-demand requests to a cache-enabled…
Moment Generating Function of the AoI in a Two-Source System With Packet Management
Mohammad Moltafet, Markus Leinonen, Marian Codreanu
We consider a status update system consisting of two independent sources and one server in which packets of each source are generated according to the Poisson process and packets a…
Query-Age-Optimal Scheduling under Sampling and Transmission Constraints
Abolfazl Zakeri, Mohammad Moltafet, Markus Leinonen +1
This letter provides query-age-optimal joint sampling and transmission scheduling policies for a heterogeneous status update system, consisting of a stochastic arrival and a genera…
Goal-Oriented Remote Tracking Through Correlated Observations in Pull-based Communications
Abolfazl Zakeri, Mohammad Moltafet, Marian Codreanu
We address the real-time remote tracking problem in a status update system comprising two sensors, two independent information sources, and a remote monitor. The status updating fo…
Multi-Source M/G/1/1 Queues with Probabilistic Preemption
Mohammad Moltafet, Hamid R. Sadjadpour, Zouheir Rezki +2
We consider a multi-source status update system consisting of multiple independent sources, a single server, and a single sink. Each source generates packets according to a Poisson…
Age-Aware Status Update Control for Energy Harvesting IoT Sensors via Reinforcement Learning
Mohammad Hatami, Mojtaba Jahandideh, Markus Leinonen +1
We consider an IoT sensing network with multiple users, multiple energy harvesting sensors, and a wireless edge node acting as a gateway between the users and sensors. The users re…
Optimal Semantic-aware Sampling and Transmission in Energy Harvesting Systems Through the AoII
Abolfazl Zakeri, Mohammad Moltafet, Marian Codreanu
We study a real-time tracking problem in an energy harvesting status update system with a Markov source and an imperfect channel, considering both sampling and transmission costs.…
On the Age-Optimality of Relax-then-Truncate Approach under Partial Battery Knowledge in Energy Harvesting IoT Networks
Mohammad Hatami, Markus Leinonen, Marian Codreanu
We consider an energy harvesting (EH) IoT network, where users make on-demand requests to a cache-enabled edge node to send status updates about various random processes, each moni…
Moment Generating Function of Age of Information in Multi-Source M/G/1/1 Queueing Systems
Mohammad Moltafet, Markus Leinonen, Marian Codreanu
We consider a multi-source status update system, where each source generates status update packets according to a Poisson process which are then served according to a generally dis…
Status Updating with an Energy Harvesting Sensor under Partial Battery Knowledge
Mohammad Hatami, Markus Leinonen, Marian Codreanu
We consider status updating under inexact knowledge of the battery level of an energy harvesting (EH) sensor that sends status updates about a random process to users via a cache-e…
Optimal Sampling Cost in Wireless Networks with Age of Information Constraints
Emmanouil Fountoulakis, Nikolaos Pappas, Marian Codreanu +1
We consider the problem of minimizing the time average cost of sampling and transmitting status updates by users over a wireless channel subject to average Age of Information const…
On the Age of Information in Multi-Source Queueing Models
Mohammad Moltafet, Markus Leinonen, Marian Codreanu
Freshness of status update packets is essential for enabling services where a destination needs the most recent measurements of various sensors. In this paper, we study the informa…
Semantic Communications in Networked Systems: A Data Significance Perspective
Elif Uysal, Onur Kaya, Anthony Ephremides +9
We present our vision for a departure from the established way of architecting and assessing communication networks, by incorporating the semantics of information for communication…
Power Minimization in Wireless Sensor Networks With Constrained AoI Using Stochastic Optimization
Mohammad Moltafet, Markus Leinonen, Marian Codreanu +1
In this paper, we consider a system where multiple low-power sensors communicate timely information about a random process to a sink. The sensors share orthogonal subchannels to tr…
Remote Tracking with State-Dependent Sensing in Pull-Based Systems: A POMDP Framework
Jiapei Tian, Abolfazl Zakeri, Marian Codreanu +1
We consider real-time remote tracking of a Markov source observed by multiple heterogeneous sensors with state-dependent sensing accuracy, motivated by distributed camera networks…
AoI Minimization in Status Update Control with Energy Harvesting Sensors
Mohammad Hatami, Markus Leinonen, Marian Codreanu
Information freshness is crucial for time-critical IoT applications, e.g., monitoring and control systems. We consider an IoT status update system with multiple users, multiple ene…
Moment Generating Function of the AoI in Multi-Source Systems with Computation-Intensive Status Updates
Mohammad Moltafet, Markus Leinonen, Marian Codreanu
We consider a multi-source status update system in which status updates are transmitted as packets containing the measured value of the monitored process and a time stamp represent…
Squeezing the Most Out of Preemption for AoI Minimization: Single-source Case
Nail Akar, Mohammad Moltafet, Sennur Ulukus +2
In this work, we study a single-source single-server continuous-time status update system where the updates arrive according to a Poisson process and update service times are gener…
On The Age Of Information In Status Update Systems With Packet Management
Maice Costa, Marian Codreanu, Anthony Ephremides
We consider a communication system in which status updates arrive at a source node, and should be transmitted through a network to the intended destination node. The status updates…
Multi-Source AoI-Constrained Resource Minimization under HARQ: Heterogeneous Sampling Processes
Saeid Sadeghi Vilni, Mohammad Moltafet, Markus Leinonen +1
We consider a multi-source hybrid automatic repeat request (HARQ) based system, where a transmitter sends status update packets of random arrival (i.e., uncontrollable sampling) an…
Minimizing the AoI in Resource-Constrained Multi-Source Relaying Systems: Dynamic and Learning-based Scheduling
Abolfazl Zakeri, Mohammad Moltafet, Markus Leinonen +1
We consider a multi-source relaying system where independent sources randomly generate status update packets which are sent to the destination with the aid of a relay through unrel…
On-Demand AoI Minimization in Resource-Constrained Cache-Enabled IoT Networks with Energy Harvesting Sensors
Mohammad Hatami, Markus Leinonen, Zheng Chen +2
We consider a resource-constrained IoT network, where multiple users make on-demand requests to a cache-enabled edge node to send status updates about various random processes, eac…
AoI in M/G/1/1 Queues with Probabilistic Preemption
Mohammad Moltafet, Hamid R. Sadjadpour, Zouheir Rezki +2
We consider a status update system consisting of one source, one server, and one sink. The source generates packets according to a Poisson process and the packets are served accord…
Status Update Control and Analysis under Two-Way Delay
Mohammad Moltafet, Markus Leinonen, Marian Codreanu +1
We study status updating under two-way delay in a system consisting of a sampler, a sink, and a controller residing at the sink. The controller controls the sampling process by sen…
Average AoI in Multi-Source Systems with Source-Aware Packet Management
Mohammad Moltafet, Markus Leinonen, Marian Codreanu
We study the information freshness under three different source aware packet management policies in a status update system consisting of two independent sources and one server. The…
Minimizing AoI in Resource-Constrained Multi-Source Relaying Systems with Stochastic Arrivals
Abolfazl Zakeri, Mohammad Moltafet, Markus Leinonen +1
We consider a multi-source relaying system where the sources independently and randomly generate status update packets which are sent to the destination with the aid of a bufferaid…
Power Minimization for Age of Information Constrained Dynamic Control in Wireless Sensor Networks
Mohammad Moltafet, Markus Leinonen, Marian Codreanu +1
We consider a system where multiple sensors communicate timely information about various random processes to a sink. The sensors share orthogonal sub-channels to transmit such info…