Seminars

MAP-tele Seminars 2011/2012

The MAP-Tele Seminars includes a series of invited talks, and a module on Research Methods on Engineering.

The talks are on telecommunications with an emphasis on Broadband Multimedia Communications.

MAP-Tele Seminars grade will include the participation in both the talks and the module.

Talks scheduled for 2011/2012:

1 Speaker: Paulo Cortez, UM/Algoritmi
TitleData Mining and Computer Networks
10.11.2011, 17h00
2 Speaker: Rui Caldeira, Ericsson
TitleFiber Access Evolution
17.11.2011, 17h00
3 Speaker: Gulherme Rocha Alves, Ericsson
TitleEvolved Packet Core
17.11.2011, 18h00
4 Speaker: Filipe Alvelos, UM
TitleNetwork routing optimization with applications to Telecommunications
24.11.2011, 17h00
5 Speaker: João Paulo Carmo, UM/Algoritmi
TitleVision microsystems
09.12.2011, 17h00
6 Speaker: Nuno Vasco Lopes, UM/Algoritmi
TitleThe Mobile World
15.12.2011, 17h00
7 Speaker: Susana Sargento, UA/IT
TitleSelf-Management in Future Networks: How can the Management Scale?
05.01.2012, 17h00
8 Speaker:  Susana Sargento, UA/IT 
TitleOptimizing Communications in Vehicular Networks
05.01.2012, 18h00
9 Speaker: Henrique Santos, UM/Algoritmi
TitleA framework for Information Security Management
12.01.2012, 17h00
10 Speaker: Luís Cortesão, PT Inovação- Aveiro
TitleMobile Finance
19.01.2012, 17h00
11 Speaker: João Nuno Ferreira, FCCN
TitleNetworking Technologies in the European and the National Research and Education Networks (GÉANT and RCTS)
26.01.2012, 17h00
12 Speaker: Ana Aguiar, UP
TitleCollaborative Mobile Sensing: Systems, Networking, Applications
02.02.2012, 17h00
13 Speaker: Nuno Borges Carvalho, UA/DETI
TitleCharacterization Challenges for SDR Radios
09.02.2012, 17h00
14 Speaker:  Nuno Borges Carvalho, UA/DETI
TitleWireless Sensor Networks Location System based on RF fingerprinting at 2.4GHz
09.02.2012, 18h00

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Seminar 1

Speaker: Paulo Cortez
TitleData Mining and Computer Networks
Abstract:
This seminar starts by briefly presenting the area of Data Mining. Then, data mining applications to the computer network field are presented (e.g. Internet Traffic Forecasting, Spam Email detection using Network Level properties).

Seminar 2

Speaker: Raul Caldeira, Ericsson
TitleFiber Access Evolution
Abstract:
Depois da aposta dos operadores em Portugal na promoção do acesso Fiber to the Home, o que se questiona é como valorizar esta rede e como identificar a evolução prevista para as redes de fibra. Analisando os diversos factores envolvidos sejam de âmbito tecnológico, de standardização ou de estratégia de rede, existem um conjunto de caminhos que merecem ser estudados: GPON, 10GPON e WDM-PON. Este último tem sido alvo de uma forte discussão no mercado, em especial, em Portugal, dado o ecossistema único de experiência do nosso país na implementação de redes FTTH.

Seminar 3

Speaker: Guilherme Rocha Alves
TitleEvolved Packet Core
Abstract:
A actual conjectura sobre o serviço móvel de dados, as tendências observadas e previstas dos seus utilizadores, será o ponto de partida para uma melhor compreensão das motivações da evolução da rede móvel de packet core e de todas as ferramentas ao alcance dos operadores para gerirem da melhor forma custo/benefício dos seus recursos de rede. A introdução de uma nova tecnologia de acesso rádio móvel como o LTE, a constante alteração dos hábitos de utilização dos serviços de dados, net neutrality, a convergência e a qualidade de serviço e2e serão alguns dos temas cobertos durante a minha exposição.

Seminar 4

Speaker: Filipe Alvelos, UM
TitleNetwork routing optimization with applications to Telecommunications 
Abstract:
In this presentation, we discuss optimization models and methods to address network routing problems. These problems consist in deciding how to send entities through a network with the objective of minimizing or maximizing some measure and according to given requirements. We begin by introducing two core network routing problems: the shortest path problem and the minimum spanning tree problem. For those problems we present classical specific algorithms and integer programming models. We then discuss different types of optimization models and solution methods for single path routing. We consider two problems: the one where the objective is minimizing the total routing cost and the one where the objective is minimizing the maximum arc load. We provide computational results with the different approaches. In the multiple spanning tree protocol for telecommunications networks, the traffic demand must be routed through a given number of spanning trees. The associated optimization problems consist in defining which spanning trees should be used and which traffic demands should be assigned to each of them. We discuss different models, solution methods, and provide computational results for the problems with the two objectives also considered for single path routing. We finish the presentation by taking some conclusions and by providing relevant references on the topics addressed.

Seminar 5

Speaker: João Paulo Ramos, UM/Algoritmi
TitleVision microsystems 
Abstract:
This seminar presents vision microsystms, which can be obtained with the fabrication techniques used in the microelectronics industry. The electronic circuits and the architectures of sensors are presented. The materials technology that allow the fabrication of photodetectors and optical filters are also covered in this seminar, as well as the processes that allow the fabrication of microsystems containg the optical components with the electronics conterparts. The seminar finishes by presenting a simple example for explaining who an optical receiver for communication purposes can be fabricated.

Seminar 6

Speaker: Nuno Vasco Lopes, UM/Algoritmi
TitleThe Mobile World 
Abstract:
In the future, Internet must provide acceptable Quality of Service (QoS) to mobile users that are running real-time applications and are moving across different access points at high speeds. The user mobility presents a great challenge to the network layer in order to maintain users on going connections. Currently, the Internet protocol that manages the user mobility at the network level is the Mobile Internet Protocol (MIP). This protocol, when a mobile user changes its point of attachment, maintains the same IP address for mobile node, so that user mobility became invisible to the application level and thus avoiding a connection interruption. Although, MIP standard allows the user mobility while maintaining an uninterrupted connection to an application, it does not have any concerns with the QoS support provided to applications with more strict performance requirements such as real-time applications. This seminar addresses the issue of mobility and QoS management principles as well as the mobility and QoS management integration in the sense of build a QoS-aware architecture for mobile Internet. After covering the mobility and QoS management principles and integration, we also propose a new QoS-aware architecture for mobile Internet. This new architecture takes into account the specific characteristics of mobile networks in order to design an integrated Mobility/QoS-aware management architecture suitable for real-time applications requirements. The simulation results indicate that the suggested architecture is able to provide acceptable QoS levels to real-time applications that are running in mobiles devices.

Seminar 7

Speaker: Susana Sargento, UM/IT
TitleSelf-Management in Future Networks: How can the Management Scale?
Abstract:
An overview of management and self-management, its challenges and common approaches, and the framework for interaction between the nodes for: (1) communication of management information; and (2) decision of the management actions to be taken, to scalably manage the network operation.

Seminar 8

Speaker: Susana Sargento, UA/IT
TitleOptimizing Communications in Vehicular Networks.
Abstract:
An overview of vehicular networks, understanding the challenges in the vehicular communication networks, showing concrete examples, both with simulation and experimental scenarios and results, and a presentation on research approaches developed to optimize their communication.

Seminar 9

Speaker: Henrique Santos, UM/Algoritmi
Title
A Framework for Information Security Management
Abstract:
We live in what is frequently called the Information Era. In a simple way, this concept tries to emphasize the central rule of information in almost all human activity, no matter its critical nature. Nowadays, from ludic gamming to business, crossing political or military activities, it is very difficult to imagine a scenario where some sort of information communication and processing is absent. Information and its supporting technologies are becoming critical resources and logically an attractive target of criminal activity. Following this path, securing this resource type is also becoming a main business goal, sometimes essential to organization survival. However, information security is a highly complex discipline, involving engineering practices, social and psychological behavior conceptions, mathematical fundamentals and management basics. With this broaden topic coverage it is not easy to decide where to start when trying to make an Information System more secure. In this seminar we will try to identify some models that together and with the support of several standards (ISO and NIST) form a framework to promote a strategic approach to the complex Information Security Management task.

Seminar 10

Speaker: Luis Cortesão, PT Inovação - Aveiro
TitleMobile Finance
Abstract:
The attention for mobile finance solutions – which include services as diverse as remittances, contactless point of sale payments or loyalty programs - has been rising steadily over the past years. Every day, new products and solutions emerge, in an effort to more conveniently address the specificities of the different markets.
This lecture will present some of the main concepts associated to this area, explaining how the market is evolving in the different markets and segments and which might be considered good practices in the deployment of this type of solutions.

Seminar 11

Speaker: João Nuno Ferreira, FCCN
TitleNetworking Technologies in the European and the National Research and Education Networks (GÉANT and RCTS) 
Abstract:
National Research and Education Networks (NREN) have been at the forefront of the deployment of advanced networking technologies. Its users demand flexible and advanced services. In this context the GÉANT network and the related development project (GN3) assume a central role. Its services, developments and emerging technologies will be presented.

At the national level, FCCN has been managing and operating the RCTS network. Its architecture and services will be presented. Its architecture and services will be presented, with explanation for the options made and prospective future evolution.

Seminar 12

Speaker: Ana Aguiar, UP
TitleCollaborative Mobile Sensing: Systems, Networking, Applications
Abstract:
The nearly ubiquitous availability of wireless connectivity has enabled taking advantage of any connected device as a collection unit for sensor data. We focus on using devices such as mobile phones, laptops, and vehicles to collect data about various aspects of personal or public life with the aim of improving the quality of life of city inhabitants through intelligent services, or improve working conditions for particularly stressful jobs, e.g. of first responders. In this talk, I will present on-going work on using vehicular networks for sensing in urban environments, including wireless link characterization based on "in the wild" measurements in Porto, a mobile sensing architecture for massive data gathering in urban areas, analysis of driver stress profile with intelligent textiles, mapping emission and traffic problem areas in a city. I will also present on-going work on characterization of a WiFi ad-hoc network for real-time evaluation of firefighters' vital signs, and assessing the impact of wireless communications on the algorithms that process them.

Seminar 13

Speaker: Nuno Borges Carvalho, UA/DETI
TitleCharacterization Challenges for SDR Radios
Abstract:
Many believe that SDR is moving quickly to an all digital system, the ultimate goal of which is a system with the ADC and DAC working directly at the RF carrier frequency. Any such system will impose different views and different strategies in the modeling and characterization of the digital components.

Moreover higher data rates in wireless signals are driving systems to wider modulation bandwidths and higher order complex modulation techniques such as M-QAM, based on OFDM. Thus the characterization of these signals for use in SDR configurations will have to be carefully considered. For instance figures like peak to minimum power ratio, PMPR, peak to average power ratio, PAPR, signal to noise and distortion ratio, SINAD, will impact severely the overall system.

This talk will discuss some of the characterization/modeling procedures proposed for SDR solutions and explain the impact that those figures of merit will have on future SDR implementations.

Seminar 14

Speaker: Nuno Borges Carvalho, UA/DETI
TitleWireless Sensor Networks Location System based on RF fingerprinting at 2.4GHz
Abstract:
Wireless location based on low cost 2.4GHz Wireless Sensor Networks is very important for the deployment of low cost, high precision location systems. Actually location systems are an actual area of work in terms of wireless technology. In this talk we will address the implementation of a system for location proposes based on RF fingerprinting, and discuss the best antennas to be used for the fixed sensors. This will then be combined with a robust switching antenna processor to present a real system to be used in location scenarios.

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