348 citations · 732 across the 19 of their papers we have counts for
21 papers · 1 filter
Blind Optimal User Association in Small-Cell Networks
Livia Elena Chatzieleftheriou, Apostolos Destounis, Georgios Paschos +1
We learn optimal user association policies for traffic from different locations to Access Points(APs), in the presence of unknown dynamic traffic demand. We aim at minimizing a bro…
UAV Trajectory Optimization for Time Constrained Applications
Emmanouil Fountoulakis, Georgios S. Paschos, Nikolaos Pappas
Unmanned Aerial Vehicles (UAVs) are poised to revolutionize communications. Utilizing their flexibility and fast deployment, we can deliver content in congested areas or provide se…
Online Convex Optimization for Caching Networks
Georgios Paschos, Apostolos Destounis, George Iosifidis
We study the problem of wireless edge caching when file popularity is unknown and possibly non-stationary. A bank of caches receives file requests and a utility is accrued for…
Cache Optimization Models and Algorithms
Georgios Paschos, George Iosifidis, Giuseppe Caire
Storage resources and caching techniques permeate almost every area of communication networks today. In the near future, caching is set to play an important role in storage-assiste…
Learning to Cooperate in D2D Caching Networks
Georgios S. Paschos, Apostolos Destounis, George Iosifidis
We consider a wireless device-to-device (D2D) cooperative network where memory-endowed nodes store and exchange content. Each node generates random file requests following an unkno…
Learning to Cache With No Regrets
Georgios S. Paschos, Apostolos Destounis, Luigi Vigneri +1
This paper introduces a novel caching analysis that, contrary to prior work, makes no modeling assumptions for the file request sequence. We cast the caching problem in the framewo…
Learn2MAC: Online Learning Multiple Access for URLLC Applications
Apostolos Destounis, Dimitrios Tsilimantos, Mérouane Debbah +1
This paper addresses a fundamental limitation of previous random access protocols, their lack of latency performance guarantees. We consider IoT transmitters competing for upli…
The Role of Caching in Future Communication Systems and Networks
Georgios S. Paschos, George Iosifidis, Meixia Tao +2
This paper has the following ambitious goal: to convince the reader that content caching is an exciting research topic for the future communication systems and networks. Caching ha…
Computational Optimal Transport for 5G Massive C-RAN Device Association
Georgios Paschos, Nikolaos Liakopoulos, Merouane Debbah +1
The massive scale of future wireless networks will create computational bottlenecks in performance optimization. In this paper, we study the problem of connecting mobile traffic to…
Selective Fair Scheduling over Fading Channels
Apostolos Destounis, Georgios S. Paschos, David Gesbert
Imposing fairness in resource allocation incurs a loss of system throughput, known as the Price of Fairness (). In wireless scheduling, increases when serving users with…
Online and Global Network Optimization: Towards the Next-Generation of Routing Platforms
Jérémie Leguay, Moez Draief, Symeon Chouvardas +4
The computation power of SDN controllers fosters the development of a new generation of control plane that uses compute-intensive operations to automate and optimize the network co…
Placing Dynamic Content in Caches with Small Population
Mathieu Leconte, Georgios Paschos, Lazaros Gkatzikis +3
This paper addresses a fundamental limitation for the adoption of caching for wireless access networks due to small population sizes. This shortcoming is due to two main challenges…
Streaming Big Data meets Backpressure in Distributed Network Computation
Apostolos Destounis, Georgios S. Paschos, Iordanis Koutsopoulos
We study network response to queries that require computation of remotely located data and seek to characterize the performance limits in terms of maximum sustainable query rate th…
Adapting Caching to Audience Retention Rate: Which Video Chunk to Store?
Lorenzo Maggi, Lazaros Gkatzikis, Georgios Paschos +1
Rarely do users watch online contents entirely. We study how to take this into account to improve the performance of cache systems for video-on-demand and video-sharing platforms i…
Loop-Free Backpressure Routing Using Link-Reversal Algorithms
Anurag Rai, Chih-ping Li, Georgios Paschos +1
The backpressure routing policy is known to be a throughput optimal policy that supports any feasible traffic demand in data networks, but may have poor delay performance when pack…
Throughput-Optimal Broadcast on Directed Acyclic Graphs
Abhishek Sinha, Georgios Paschos, Chih-ping Li +1
We study the problem of broadcasting packets in wireless networks. At each time slot, a network controller activates non-interfering links and forwards packets to all nodes at a co…
Throughput Optimal Routing in Overlay Networks
Georgios Paschos, Eytan Modiano
Maximum throughput requires path diversity enabled by bifurcating traffic at different network nodes. In this work, we consider a network where traffic bifurcation is allowed only…
Minimal Evacuation Times and Stability
Leonidas Georgiadis, Georgios S. Paschos, Lavy Libman +1
We consider a system where packets (jobs) arrive for processing using one of the policies in a given class. We study the connection between the minimal evacuation times and the sta…
Asymptotic Laws for Joint Content Replication and Delivery in Wireless Networks
S. Gitzenis, G. S. Paschos, L. Tassiulas
We investigate on the scalability of multihop wireless communications, a major concern in networking, for the case that users access content replicated across the nodes. In contras…
NCRAWL: Network Coding for Rate Adaptive Wireless Links
Ioannis Broustis, Georgios Paschos, Dimitris Syrivelis +2
Intersession network coding (NC) can provide significant performance benefits via mixing packets at wireless routers; these benefits are especially pronounced when NC is applied in…
Performance of wireless network coding: motivating small encoding numbers
Petteri Mannersalo, Georgios S. Paschos, Lazaros Gkatzikis
This paper focuses on a particular transmission scheme called local network coding, which has been reported to provide significant performance gains in practical wireless networks.…