Browsing by Subject "Telecommunications"
Now showing items 1-20 of 111
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5G and human health
(2021)The considerable characteristics of 5G technology (Fifth Generation of telecommunication) is the very high amount of data that can be transmitted in the time unit (data speed: Megabits per second - throughput) and the very ... -
An 802.11k Compliant Framework for Cooperative Handoff in Wireless Networks
(2009)In IEEE 802.11-based wireless networks, the stations (STAs) are associated with the available access points (APs) and communicate through them. In traditional hando. schemes, the STAs get information about the active APs ... -
Adaptive channel allocation in OFDM/SDMA wireless LANs with limited transceiver resources
(2004)Smart antennas increase capacity of wireless systems by allowing channel reuse by several users in the same cell through space division multiple access (SDMA). Orthogonal Frequency Division Multiplexing (OFDM) creates ... -
Agent-based simulation of data-driven fire propagation dynamics
(2004)Real world problems such as fire propagation prediction, can often be considered as a compositional combination of multiple, simple but coupled subproblems corresponding to analytical and computational behavior models of ... -
Approximation Algorithms for Mobile Data Caching in Small Cell Networks
(2014)Small cells constitute a promising solution for managing the mobile data growth that has overwhelmed network operators. Local caching of popular content items at the small cell base stations (SBSs) has been proposed to ... -
Asynchronous TDMA ad hoc networks: scheduling and performance
(2004)A common assumption of time division multiple access (TDMA)-based wireless ad hoc networks is the existence of network-wide slot synchronization. Such a mechanism is difficult to support in practice. In asynchronous TDMA ... -
Automated context aggregation and file annotation for PAN-based computing
(2007)This paper presents a method for automatically annotating files created on portable devices with contextual metadata. We achieve this through the combination of two system components. One is a context dissemination mechanism ... -
Autoregressive energy-efficient context forwarding in wireless sensor networks for pervasive healthcare systems
(2014)Driven by technological advances in low-power network systems and medical sensors, we have witnessed during the recent years the adoption of wireless sensor networks (WSNs) in electronic healthcare. Improving the quality ... -
BER performance of FSO links over strong atmospheric turbulence channels with pointing errors
(2008)In this letter, we investigate the error rate performance of free-space optical (FSO) links over strong turbulence fading channels together with misalignment (pointing error) effects. First, we present a novel closed-form ... -
Blind adaptive channel estimation in OFDM Systems
(2006)We consider the problem of blind channel estimation in zero padding OFDM systems, and propose blind adaptive algorithms in order to identify the impulse response of the multipath channel. In particular, we develop RLS and ... -
Cache consistency in Wireless Multimedia Sensor Networks
(2010)The production of cheap CMOS cameras, which are able to capture rich multimedia content, combined with the creation of low-power circuits, gave birth to what is called Wireless Multimedia Sensor Networks (WMSNs). WMSNs ... -
CARROT - A tool for fast and accurate soft error rate estimation
(2006)We present a soft error rate (SER) analysis methodology within a simulation and design environment that covers a broad spectrum of design problems and parameters. Our approach includes modeling of the particle hit at the ... -
CDR-MAC: A protocol for full exploitation of directional antennas in ad hoc wireless networks
(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 Auction Theory Driven Spectrum Management
(2011)Dynamic spectrum markets of the future will involve complex spectrum transactions among operators and users. The nontrivial dynamics in channel quality and spatiotemporal spectrum availability call for new ways of spectrum ... -
Challenges in Demand Load Control for the Smart Grid
(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 ... -
Client-server games and their equilibria in peer-to-peer networks
(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 ... -
Cloud Computing
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Coded Free-Space Optical Links over Strong Turbulence and Misalignment Fading Channels
(2011)The performance of optical wireless systems deteriorates to a large extent from the presence of turbulence and pointing error effects. To meet the typical bit error rate (BER) targets for reliable communications within the ... -
Collision Recovery in Distributed Wireless Networks with Opportunistic Cooperation
(2010)In this letter we focus on the problem of recovering information from collided packets in distributed wireless networks that are based on the IEEE 802.11 standard. We propose a cooperative protocol that employs the concept ...