Πλοήγηση ανά Συγγραφέα "Tassiulas, L."
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Capacity and Stable Throughput Regions for the Broadcast Erasure Channel With Feedback: An Unusual Union
Sagduyu, Y. E.; Georgiadis, L.; Tassiulas, L.; Ephremides, A. (2013)We consider a source node broadcasting to two receivers over a general erasure channel with receiver feedback. We characterize the capacity region of the channel and construct algorithms based on linear network coding ... -
Capacity-achieving encoding for the broadcast erasure channel with multiple users
Gatzianas, M.; Georgiadis, L.; Tassiulas, L. (2011)We consider the N-user memoryless broadcast erasure channel with N unicast sessions (one for each user) where receiver feedback is sent to the transmitter in the form of ACK/NACK messages. We first provide a generic outer ... -
Carrier assignment algorithms for OFDM-based multi-carrier wireless networks with channel adaptation
Koutsopoulos, I.; Tassiulas, L. (2008)We study carrier assignment in a single-cell multiuser OFDM multi-carrier system so as to satisfy user rate requirements with minimal resources. Different users experience different quality in different carriers due to ... -
CDR-MAC: A protocol for full exploitation of directional antennas in ad hoc wireless networks
Korakis, T.; Jakllari, G.; Tassiulas, L. (2008)In this paper, we propose a new Medium Access Control (MAC) protocol for full exploitation of directional antennas in wireless networks. The protocol introduces a circular directional transmission of the Request To Send ... -
Challenges in Demand Load Control for the Smart Grid
Koutsopoulos, I.; Tassiulas, L. (2011)The ground to address challenges in demand load control for the smart power grid is now more fertile than ever, due to advances in communication infrastructures and the creation of a two-way channel for real-time communication ... -
A class of multi-carrier CDMA access methods for wide-bandwidth wireless channels
Gerakoulis, D.; Efthymoglu, G.; Koravos, F.; Tassiulas, L. (2005)In this article we describe and evaluate a general class of synchronous multi-carrier CDMA methods. In the proposed methods each accessing user is encoded by a Hadamard sequence and a multi-carrier (MC) encoder. The ... -
Client and server games in peer-to-peer networks
Koutsopoulos, I.; Tassiulas, L.; Gkatzikis, L. (2009)We consider a content sharing network of noncooperative peers. The strategy set of each peer comprises, (i) client strategies, namely feasible request load splits to servers, and (ii) server strategies, namely scheduling ... -
Client-server games and their equilibria in peer-to-peer networks
Koutsopoulos, I.; Tassiulas, L.; Gkatzikis, L. (2014)In peer-to-peer networks, each peer acts simultaneously as client and server, by issuing and satisfying content requests respectively. In this work, we use concepts from non-cooperative game theory to model the interaction ... -
A cloud-based content replication framework over multi-domain environments
Katsalis, K.; Sourlas, V.; Korakis, T.; Tassiulas, L. (2014)Cloud service provisioning on top of virtual infrastructures is of major importance in modern ICT, since it is directly correlated to the way business models are designed and revenue is generated from the cloud service ... -
Collaborative placement and sharing of storage resources in the Smart Grid
Gkatzikis, L.; Iosifidis, G.; Koutsopoulos, I.; Tassiulas, L. (2015)The development of low-cost renewable energy generators transforms households into electricity prosumers. Given that generation from renewable sources is highly volatile and does not perfectly match the daily demand pattern ... -
Community building over neighborhood Wireless Mesh Networks
Antoniadis, P.; Le Grand, B.; Satsiou, A.; Tassiulas, L.; Aguiar, R.; Barraca, J. P.; Sargento, S. (2008)The fourth generation (4G) networks provide a converged environment for technology and service provision. The user-centric vision next-generation 4G is neighborhood Wireless Mesh Networks (WMNs). The vision for the formation ... -
Content Replication and Delivery in Information-Centric Networks
Sourlas, V.; Flegkas, P.; Katsaros, D.; Tassiulas, L. (2014)Information-centric networking (ICN) is emerging as the main future networking environment, given that the vast majority of Internet activities are related to information access and delivery. This chapter presents a ... -
A content-based publish/subscribe framework for large-scale content delivery
Diallo, M.; Sourlas, V.; Flegkas, P.; Fdida, S.; Tassiulas, L. (2013)The publish/subscribe communication paradigm has become an important architectural style for designing distributed systems and has recently been considered one of the most promising future network architectures that solves ... -
Contention and traffic load-aware association in IEEE 802.11 WLANs: Algorithms and implementation
Keranidis, S.; Korakis, T.; Koutsopoulos, I.; Tassiulas, L. (2011)Efficient association of a station with the appropriate access point has always been a challenging problem. The standard approach of considering only the Received Signal Strength, has recently been substituted by more ... -
Control and optimization meet the smart power grid: Scheduling of power demands for optimal energy management
Koutsopoulos, I.; Tassiulas, L. (2012)The smart power grid harnesses information and communication technologies to enhance reliability and enforce sensible use of energy through effective management of demand load. We envision a scenario with real-time ... -
Control of Wireless Networks with Rechargeable Batteries
Gatzianas, M.; Georgiadis, L.; Tassiulas, L. (2010)We consider the problem of cross-layer resource allocation for wireless networks operating with rechargeable batteries under general arrival, channel state and recharge processes. The objective is to maximize total system ... -
Convex Approximation Algorithms for Back-Pressure Power Control
Matskani, E.; Sidiropoulos, N. D.; Tassiulas, L. (2012)Throughput-optimal multihop wireless network operation entails a key physical-layer optimization problem: maximizing a weighted sum of link rates, with weights given by the differential queue backlogs. This emerges in joint ... -
Convex approximation algorithms for back-pressure power control of wireless multi-hop networks
Matskani, E.; Sidiropoulos, N. D.; Tassiulas, L. (2011)Cross-layer design and operation of wireless networks has attracted significant interest in the last decade, yet some basic problems in the area remain unsolved. In this paper, we consider the joint routing and power control ... -
Convex approximation techniques for joint multiuser downlink beamforming and admission control
Matskani, E.; Sidiropoulos, N. D.; Luo, Z. Q.; Tassiulas, L. (2008)Multiuser downlink beamforming under quality of service (QoS) constraints has attracted considerable interest in recent years, because it is particularly appealing from a network operator's perspective (e.g., UNITS, 802.16e). ... -
Cooperation and directionality: A co-opdirectional MAC for wireless ad hoc networks
Tao, Z.; Korakis, T.; Slutskiy, Y.; Panwar, S.; Tassiulas, L. (2007)Advances in cooperative communications and directional antenna design so far have taken place in parallel, if not in isolation from each other. To explore the role they may play in the next generation of wireless networks, ...