Browsing by Subject "Telecommunications"
Now showing items 21-40 of 111
-
A comparison of centralized and distributed meta-scheduling architectures for computation and communication tasks in Grid networks
(2009)The management of Grid resources requires scheduling of both computation and communication tasks at various levels. In this study, we consider the two constituent sub-problems of Grid scheduling, namely: (i) the scheduling ... -
Compressed Video Streaming in Cooperative Wireless Networks with Interfering Transmissions
(2012)In this paper, we present a video streaming system for wireless networks that employs utility optimization of pre-compressed video at the application layer, together with a novel cooperative wireless physical layer (PHY) ... -
Connectivity Issues for Ultraviolet UV-C Networks
(2011)This paper focuses on the connectivity issues of a non-line-of-sight (NLOS) optical wireless network operating in the ultraviolet UV-C spectral region. NLOS UV-C transmitters have a limited effective coverage and, hence, ... -
A content-based publish/subscribe framework for large-scale content delivery
(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 ... -
Control of Wireless Networks with Rechargeable Batteries
(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 techniques for joint multiuser downlink beamforming and admission control
(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). ... -
Cooperative caching in wireless multimedia sensor networks
(2008)The recent advances in miniaturization and the creation of low-power circuits, combined with small-sized batteries have made the development of wireless sensor networks a working reality. Lately, the production of cheap ... -
Cooperative Protocol for Analog Network Coding in Distributed Wireless Networks
(2010)The concept of analog network coding (ANC) considers the concurrent transmission of signals over the wireless medium so that they intentionally interfere. Higher network throughput can be achieved with ANC when an intended ... -
Coordinating Interfering Transmissions in Cooperative Wireless LANs
(2011)In this paper we present a cooperative medium access control (MAC) protocol that is designed for a physical layer that can decode interfering transmissions in distributed wireless networks. The proposed protocol pro-actively ... -
Cross-layer adaptive techniques for throughput enhancement in wireless OFDM-based networks
(2006)Although independent consideration of layers simplifies wireless system design, it is inadequate since: 1) it does not consider the effect of co-channel user interference on higher layers; 2) it does not address the impact ... -
Cross-Layer Antenna Beamforming and Power Control in Wireless Uplinks
(2009)We consider backlog-driven power control and antenna beamforming as a means to maximize network throughput in a wireless uplink, where a base station receives with an antenna array from single-antenna wireless users. ... -
Cross-layer design for power efficiency and QoS provisioning in multi-hop wireless networks
(2006)In recent years, it has become common consensus that independent consideration of communication layers often turns out to be inadequate in terms of providing the desired quality of service (QoS) and power efficiency in ... -
A Cross-Layer Framework for Association Control in Wireless Mesh Networks
(2009)The user association mechanism specified by the IEEE 802.11 standard does not consider the channel conditions and the AP load in the association process. Employing the mechanism in its plain form in wireless mesh networks, ... -
Deployment Strategies and Energy Efficiency of Cellular Networks
(2012)The energy efficiency of cellular networks is explored for different network deployment strategies and traffic conditions. The total network power consumption and the ratios Watts/kbps, Watts/user are used as metrics to ... -
Design and implementation of distributed load balancing and fast handoff for wireless mesh networks
(2015)The association/handoff procedures are very important towards achieving a balanced operation in 802.11-based wireless mesh networks. In this paper, we design and implement a cooperative association/handoff scheme, where ... -
Detecting and Preventing Machine-to-Machine Hijacking Attacks in Cellular Networks
(2012)Machine-to-machine (M2M) communications are increasingly popular over cellular networks, due to their unlimited potential and the low cost of deployment. As a result, M2M infrastructures are attractive targets to attackers. ... -
Distributed Online Algorithms for the Agent Migration Problem in WSNs
(2013)The mobile agent paradigm has been adopted by several systems in the area of wireless sensor networks as it enables a flexible distribution and placement of application components on nodes, at runtime. Most agent placement ... -
Distributed topology construction of Bluetooth wireless personal area networks
(2005)Bluetooth, a wireless technology based on a frequency-hopping physical layer, enables portable devices to form short-range wireless ad hoc networks. Bluetooth hosts are not able to communicate unless they have previously ... -
Double Auction Mechanisms for Resource Allocation in Autonomous Networks
(2010)Auction mechanisms are used for allocating a resource among multiple agents with the objective to maximize social welfare. What makes auctions attractive is that they are agnostic to utility functions of agents. Auctions ... -
Dynamic frequency management in 802.11-based multi-radio wireless networks
(2014)Efficient channel selection is essential in 802.11 mesh deployments, for minimising contention and interference among co-channel devices and thereby supporting a plurality of quality of service (QoS)-sensitive applications. ...