Search results for "5G"
showing 10 items of 97 documents
Towards a Smart Campus Through Participatory Sensing
2018
In recent years, the percentage of the population owning a smartphone has increased significantly. These devices provide users with more and more functions that make them real sensing platforms. Exploiting the capabilities offered by smartphones, users can collect data from the surrounding environment and share them with other entities in the network thanks to existing communication infrastructures, i.e., 3G/4G/5G or WiFi. In this work, we present a system based on participatory sensing paradigm using smartphones to collect and share local data in order to monitor make a campus 'smart'. In particular, our system infers the activities performed by users (e.g., students) in a campus in order …
Secrecy analysis and learning-based optimization of cooperative NOMA SWIPT systems
2019
Non-orthogonal multiple access (NOMA) is considered to be one of the best candidates for future networks due to its ability to serve multiple users using the same resource block. Although early studies have focused on transmission reliability and energy efficiency, recent works are considering cooperation among the nodes. The cooperative NOMA techniques allow the user with a better channel (near user) to act as a relay between the source and the user experiencing poor channel (far user). This paper considers the link security aspect of energy harvesting cooperative NOMA users. In particular, the near user applies the decode-and-forward (DF) protocol for relaying the message of the source no…
Adapting to Dynamic LEO-B5G Systems : Meta-Critic Learning Based Efficient Resource Scheduling
2022
Low earth orbit (LEO) satellite-assisted communications have been considered as one of key elements in beyond 5G systems to provide wide coverage and cost-efficient data services. Such dynamic space-terrestrial topologies impose exponential increase in the degrees of freedom in network management. In this paper, we address two practical issues for an over-loaded LEO-terrestrial system. The first challenge is how to efficiently schedule resources to serve the massive number of connected users, such that more data and users can be delivered/served. The second challenge is how to make the algorithmic solution more resilient in adapting to dynamic wireless environments.To address them, we first…
5G IoT System for Real-Time Psycho-Acoustic Soundscape Monitoring in Smart Cities With Dynamic Computational Offloading to the Edge
2021
Environmental noise monitoring for smart cities need to be as much efficient as possible in order to mitigate its significant impact in the health of their inhabitants. 5G Internet of Things (IoT) systems offer a big opportunity to offload the computation from the sensor nodes, since it provides a series of new concepts for dynamic computing that the previous technologies did not offer. In this article, a complete 5G IoT system for psycho-acoustic monitoring has been designed and implemented using different options for offloading computation to different parts of the system. This offloading has been done by developing different functional splittings of the psycho-acoustic metrics algorithms…
Simulation of BSDEs with jumps by Wiener Chaos Expansion
2016
International audience; We present an algorithm to solve BSDEs with jumps based on Wiener Chaos Expansion and Picard's iterations. This paper extends the results given in Briand-Labart (2014) to the case of BSDEs with jumps. We get a forward scheme where the conditional expectations are easily computed thanks to chaos decomposition formulas. Concerning the error, we derive explicit bounds with respect to the number of chaos, the discretization time step and the number of Monte Carlo simulations. We also present numerical experiments. We obtain very encouraging results in terms of speed and accuracy.
Random walk approximation of BSDEs with H{\"o}lder continuous terminal condition
2018
In this paper, we consider the random walk approximation of the solution of a Markovian BSDE whose terminal condition is a locally Hölder continuous function of the Brownian motion. We state the rate of the L2-convergence of the approximated solution to the true one. The proof relies in part on growth and smoothness properties of the solution u of the associated PDE. Here we improve existing results by showing some properties of the second derivative of u in space. peerReviewed
Reconstrucción del entorno radio para comunicaciones en agrupaciones de vehículos
2020
Los pelotones de vehículos son grupos de vehículos que viajan juntos, manteniendo una distancia constante entre ellos. Los pelotones suelen necesitar comunicaciones inalámbricas sólidas y fiables para mantener su estructura y realizar maniobras coordinadas. Cuando el pelotón es asistido por la infraestructura a través de una comunicación celular vehículo a todo (V2X), uno de los factores críticos es reducir la latencia de la comunicación. En este trabajo se explora el uso de una técnica de interpolación espacial, concretamente el Kriging Ordinario, como mecanismo para reducir la sobrecarga de señalización en la etapa de adquisición de información del canal, lo que puede repercutir en la prá…
Editorial: Special Issue on "5G Workshop on Networks, Services and Applications" : topics from the 1st Joint Workshop between Center for TeleInFrastr…
2010
Published version of an article in Wireless Personal Communications, 57(3), 313-316. Also available from the publisher at http://dx.doi.org/10.1007/s11277-010-0068-7 The first joint workshop between Center for TeleInFrastruktur (CTIF), Denmark and Center for Wireless Innovation (CWI), Norway, was held in Aalborg, Denmark on October 8, 2009, focusing on yet undefined term, "5G mobile networks". This Special Issue features eleven selected papers based on networks, services and applications aspects of 5G.
Viedokļu polarizācija par 5G interneta ziņu medijos TVNET un DELFI un Facebook informācijas burbuļos (no 2019.gada 1.maija līdz 2020.gada 1.maijam)
2021
Bakalaura darba tēma ir Viedokļu polarizācija par 5G interneta ziņu medijos Tvnet un Delfi un Facebook informācijas burbuļos no 2019.gada 1.maija līdz 2020.gada 1.maijam. Pētījuma problēma saistīta ar to, ka tehnoloģisko attīstību un citus sabiedrībai svarīgus jautājumus var apgrūtināt maldinošas informācijas izplatīšanās sociālo tīklu platformās, mazinot uzticību leģitīmiem medijiem. Teorijā apskatīta mediju dienaskārtības veidošanās, zinātnes un mediju attiecības, žurnālistikas izaicinājumi tehnoloģiju laikmetā, kā arī rāmējumu teorija. Metodoloģijā aprakstīta kvalitatīvās kontentanalīzes metode, kā arī interneta aptauja un rāmējumu analīze. Pētījumā ietverta vadošo interneta ziņu mediju …
OPTIMIZATIONS FOR TENSORIAL BERNSTEIN–BASED SOLVERS BY USING POLYHEDRAL BOUNDS
2010
The tensorial Bernstein basis for multivariate polynomials in n variables has a number 3n of functions for degree 2. Consequently, computing the representation of a multivariate polynomial in the tensorial Bernstein basis is an exponential time algorithm, which makes tensorial Bernstein-based solvers impractical for systems with more than n = 6 or 7 variables. This article describes a polytope (Bernstein polytope) with a number of faces, which allows to bound a sparse, multivariate polynomial expressed in the canonical basis by solving several linear programming problems. We compare the performance of a subdivision solver using domain reductions by linear programming with a solver using a c…