Search results for "networks"

Implementing a lecture feedback system using semi-ad-hoc wireless networks

2007

Service-Oriented Wireless Virtualized Networks: An Intelligent Resource Management Approach

2022

Trajectory Design and Resource Allocation for Multi-UAV Networks : Deep Reinforcement Learning Approaches

2023

The future mobile communication system is expected to provide ubiquitous connectivity and unprecedented services over billions of devices. The unmanned aerial vehicle (UAV), which is prominent in its flexibility and low cost, emerges as a significant network entity to realize such ambitious targets. In this work, novel machine learning-based trajectory design and resource allocation schemes are presented for a multi-UAV communications system. In the considered system, the UAVs act as aerial Base Stations (BSs) and provide ubiquitous coverage. In particular, with the objective to maximize the system utility over all served users, a joint user association, power allocation and trajectory desi…

Computer Networks

2018

This book constitutes the thoroughly refereed proceedings of the 25th International Conference on Computer Networks, CN 2018, held in Gliwice, Poland, in June 2018. The 34 full papers presented were carefully reviewed and selected from 86 submissions. They are organized in topical sections on computer networks; teleinformatics and telecommunications; queueing theory; cybersecurity and quality service.

Coverage study of a sustainable IoT system for industrial applications

2022

Los dispositivos del Internet de las Cosas (IoT) son muy útiles para monitorizar información en escenarios industriales incluso en zonas que tienen difícil acceso a través de las conexiones tradicionales. Las comunicaciones inalámbricas fiables pueden ser un reto en entornos industriales, donde la señal de comunicaciones es a menudo bloqueada debido a la presencia de maquinaria industrial, con posibles bloqueos intermitentes y/o impredecibles. Este artículo evalúa las características de cobertura de un despliegue sostenible y de bajo coste de dispositivos IoT para monitorizar una instalación industrial dedicada al diseño y montaje de sistemas de automatización para la industria alimentaria.…

Knowledge organization for modelling workflows in Taverna environment

2014

Today Workflow Management Systems (WFMS), like Taverna and Kepler, have a very important place in the everyday work of the scientist. These tools support the access to computational resources and act as interface for building complex data processing chains. The next step is to support decisions of the researcher on autonomously developing workflow parts guided by requirements of the scientist while she/he is working on the high-level goal of the experiment. To this aim, it is necessary an ontology to store the knowledge related to the experiments and tools used, and to make this knowledge available not only to the scientist, but also to a suitable artificial intelligent system. In this pape…

Recognizing Video Resolution by Monitoring Memory Metrics in Mobile Clients

2019

Content delivery is one of the most successful applications in mobile networks. Mobile edge servers are significantly contributing to the improvement of this type of applications, by also performing resolution adaptations as a function of the radio link quality observed by the users. In this paper, we face the problem of dynamically tracking the perceived video resolution by mobile clients in a mobile edge environment to guarantee an agreed Service Level Agreement (SLA). To this purpose, we propose a protocol-agnostic approach, based on monitoring some memory metrics of a running video streaming process at the mobile client, for identifying the time-varying resolution of the video content.

Compression and load balancing for efficient sparse matrix-vector product on multicore processors and graphics processing units

2021

We contribute to the optimization of the sparse matrix-vector product by introducing a variant of the coordinate sparse matrix format that balances the workload distribution and compresses both the indexing arrays and the numerical information. Our approach is multi-platform, in the sense that the realizations for (general-purpose) multicore processors as well as graphics accelerators (GPUs) are built upon common principles, but differ in the implementation details, which are adapted to avoid thread divergence in the GPU case or maximize compression element-wise (i.e., for each matrix entry) for multicore architectures. Our evaluation on the two last generations of NVIDIA GPUs as well as In…

Pratique et sémantique de la culture informationnelle

2015

In this paper, we present a formative experience in information literacy that can build on lasting from a reflexive, comparative approach skills; analytic and dialectic. On the theoretical side, we propose to reconcile the theories of human activity with simondiennes theories of technical culture. Trace analysis of learners permit to construct a summary ontology digital skills and shows the relevance of a semantic device training, which is part of the prospect of convergence between information cultures transliteracy kind.

On-Demand Security Framework for 5GB Vehicular Networks

2023

Building accurate Machine Learning (ML) at-tack detection models for 5G and Beyond (5GB) vehicular networks requires collaboration between Vehicle-to-Everything (V2X) nodes. However, while operating collaboratively, ensuring the ML model’s security and data privacy is challenging. To this end, this article proposes a secure and privacy-preservation on-demand framework for building attack-detection ML models for 5GB vehicular networks. The proposed framework emerged from combining 5GB technologies, namely, Federated Learning (FL), blockchain, and smart contracts to ensure fair and trustedinteractions between FL servers (edge nodes) with FL workers (vehicles). Moreover, it also provides an ef…