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Sobre

Manuel Ricardo é formado em Engenharia Eletrotécnica e de Computadores, especialização de Telecomunicações, pela Faculdade de Engenharia da Universidade do Porto (FEUP), tendo obtido os graus de Licenciado, Mestre, Doutor e Agregado. É professor catedrático na FEUP onde leciona disciplinas de redes de computadores e comunicações móveis. É membro do Conselho de Administração do instituo de investigação INESC TEC onde também coordena o cluster de centros de investigação em Redes de Sistemas Inteligentes.

Tópicos
de interesse
Detalhes

Detalhes

024
Publicações

2019

Predicting throughput in IEEE 802.11 based wireless networks using directional antenna

Autores
Kandasamy, S; Morla, R; Ramos, P; Ricardo, M;

Publicação
Wireless Networks

Abstract
In IEEE 802.11 based wireless networks interference increases as more access points are added. A metric helping to quantize this interference seems to be of high interest. In this paper we study the relationship between the (Formula presented.) metric, which captures interference, and throughput for IEEE 802.11 based network using directional antenna. The (Formula presented.) model was found to best represent the relationship between the interference metric and the network throughput. We use this model to predict the performance of similar networks and decide the best configuration a network operator could use for planning his network. © 2017 Springer Science+Business Media, LLC

2019

Improving ns-3 Emulation Performance for Fast Prototyping of Routing and SDN Protocols: Moving Data Plane Operations to Outside of ns-3

Autores
Fontes, H; Cardoso, T; Campos, R; Ricardo, M;

Publicação
Simulation Modelling Practice and Theory

Abstract

2019

Multi-virtual wireless mesh networks through multiple channels and interfaces

Autores
Marques, C; Kandasamy, S; Sargento, S; Matos, R; Calcada, T; Ricardo, M;

Publicação
Wireless Networks

Abstract
The high flexibility of the wireless mesh networks (WMNs) physical infrastructure can be exploited to provide communication with different technologies and support for a variety of different services and scenarios. Context information may trigger the need to build different logical networks on top of physical networks, where users can be grouped according to similarity of their context, and can be assigned to the logical networks matching their context. When building logical networks, network virtualization can be a very useful technique allowing a flexible utilization of a physical network infrastructure. Moreover, dynamic resource management using multiple channels and interfaces, directional antennas and power control, is able to provide a higher degree of flexibility in terms of resource allocation among the available virtual networks, to enable isolated and non-interfering communications while maximizing the network efficiency. In this paper we propose a resource management approach that uses transmit power control algorithm with both omnidirectional and directional antennas, to determine the resources of each virtual network while minimizing interference between virtual networks, considering the support of multiple services and users. Each virtual network can be extended to include the nodes of the WMN required by new users. The results of the proposed approach show that the support of multiple virtual networks for multiple services highly improves the network performance when compared to the support of the services in only one virtual network, with no interference minimization nor dynamic resource control. © 2018 Springer Science+Business Media, LLC, part of Springer Nature

2019

ns-3 NEXT

Autores
Fontes, H; Lamela, V; Campos, R; Ricardo, M;

Publicação
Proceedings of the 2019 Workshop on ns-3 - WNS3 2019

Abstract

2019

ns-3 NEXT: Towards a reference platform for offline and augmented wireless networking experimentation

Autores
Fontes, H; Lamela, V; Campos, R; Ricardo, M;

Publicação
ACM International Conference Proceeding Series

Abstract
In the past years, INESC TEC has been working on using ns-3 to reduce the gap between Simulation and Experimentation. Two major contributions resulted from our work: 1) the Fast Prototyping development process, where the same ns-3 protocol model is used in a real experiment; 2) the Trace-based Simulation (TS) approach, where traces of radio link qualities and position of nodes from past experiments are injected into ns-3 to achieve repeatable and reproducible experiments. In this paper we present ns-3 NEXT, our vision for ns-3 to enable simulation and experimentation using the same platform. We envision ns-3 as the platform that can automatically learn from past experiments and improve its accuracy to a point where simulated resources can seamlessly replace real resources. At that point, ns-3 can either replace a real testbed accurately (Offline Experimentation) or add functionality and scale to testbeds (Augmented Experimentation). Towards this vision, we discuss the current limitations and propose a plan to overcome them collectively within the ns-3 community. © 2019 ACM.

Teses
supervisionadas

2017

Wireless Underwater Broadband and Long Range Communications using Underwater Drones as Data Mules

Autor
Leonel Gaspar da Costa Soares

Instituição
UP-FEUP

2017

Application-driven Wireless Sensor Networks

Autor
Bruno Filipe Lopes Garcia Marques

Instituição
UP-FEUP

2017

Topology Control of Flying Backhaul Mesh Networks

Autor
Eduardo Nuno Moreira Soares de Almeida

Instituição
UP-FEUP

2017

Modeling the processing delays of Internet of Things nodes in the ns3 network simulator

Autor
Guilherme Daniel Gonçalves Ferreira

Instituição
UP-FEUP

2017

Integração do Samba 4 na plataforma IPBRICK para criar um Active Directory Open Source

Autor
João Pedro Leite de Castro

Instituição
UP-FEUP