1 citations · 3 across the 28 of their papers we have counts for
12 papers · 1 filter
Double Spending Analysis of Nakamoto Consensus for Time-Varying Mining Rates with Ruin Theory
Mustafa Doger, Sennur Ulukus, Nail Akar
Theoretical guarantees for double spending probabilities for the Nakamoto consensus under the -deep confirmation rule have been extensively studied for zero/bounded network dela…
Joint Age-State Belief is All You Need: Minimizing AoII via Pull-Based Remote Estimation
Ismail Cosandal, Sennur Ulukus, Nail Akar
Age of incorrect information (AoII) is a recently proposed freshness and mismatch metric that penalizes an incorrect estimation along with its duration. Therefore, keeping track of…
Scheduling Policies in a Multi-Source Status Update System with Dedicated and Shared Servers
Sahan Liyanaarachchi, Sennur Ulukus, Nail Akar
Use of multi-path network topologies has become a prominent technique to assert timeliness in terms of age of information (AoI) and to improve resilience to link disruptions in com…
Modeling Interfering Sources in Shared Queues for Timely Computations in Edge Computing Systems
Nail Akar, Melih Bastopcu, Sennur Ulukus +1
Most existing stochastic models on age of information (AoI) focus on a single shared server serving status update packets from sources where each packet update stream is Pois…
Multi-Threshold AoII-Optimum Sampling Policies for CTMC Information Sources
Ismail Cosandal, Nail Akar, Sennur Ulukus
We study push-based sampling and transmission policies for a status update system consisting of a general finite-state continuous-time Markov chain (CTMC) information source with k…
Cyclic Scheduler Design for Minimizing Age of Information in Massive Scale Networks Susceptible to Packet Errors
Sahan Liyanaarachchi, Sennur Ulukus, Nail Akar
In multi-source status update systems, sources need to be scheduled appropriately to maintain timely communication between each of the sources and the monitor. A cyclic schedule is…
PoW Security-Latency under Random Delays and the Effect of Transaction Fees
Mustafa Doger, Sennur Ulukus, Nail Akar
Safety guarantees and security-latency problem of Nakamoto consensus have been extensively studied in the last decade with a bounded delay model. Recent studies have shown that PoW…
Age of Information in a Single-Source Generate-at-Will Dual-Server Status Update System
Nail Akar, Sennur Ulukus
We study age of information (AoI) in a single-source dual-server status update system for the generate at will (GAW) scenario, consisting of an information source, dual servers, an…
AoII-Optimum Sampling of CTMC Information Sources Under Sampling Rate Constraints
Ismail Cosandal, Nail Akar, Sennur Ulukus
We consider a sensor that samples an -state continuous-time Markov chain (CTMC)-based information source process, and transmits the observed state of the source, to a remote mon…
Minimizing the Age of Two Heterogeneous Sources With Packet Drops Via Cyclic Schedulers
Sahan Liyanaarachchi, Sennur Ulukus, Nail Akar
In a communication setting where multiple sources share a single channel to provide status updates to a remote monitor, source transmissions need to be scheduled appropriately to m…
Modeling AoII in Push- and Pull-Based Sampling of Continuous Time Markov Chains
Ismail Cosandal, Nail Akar, Sennur Ulukus
Age of incorrect information (AoII) has recently been proposed as an alternative to existing information freshness metrics for real-time sampling and estimation problems involving…
Scalable Cyclic Schedulers for Age of Information Optimization in Large-Scale Status Update Systems
Nail Akar, Sahan Liyanaarachchi, Sennur Ulukus
We study cyclic scheduling for generate-at-will (GAW) multi-source status update systems with heterogeneous service times and packet drop probabilities, with the aim of minimizing…