UTM Lab Meeting: Mixing Packets: Pros and Cons of Network Coding

By allowing intermediate nodes in mobile ad-hoc and sensor networks to perform non-trivial operations on packets, thus mixing data from multiple streams, network coding breaks with the ruling store and forward networking paradigm and opens a myriad of challenging questions. Following an overview of the theory and practice of emerging network coding protocols, we provide a taxonomy of their security vulnerabilities, which highlights the differences between attack scenarios in which network coding is particularly vulnerable and other relevant cases in which the intrinsic properties of network coding allow for stronger and more efficient security solutions than classical routing. Furthermore, we give practical examples where network coding can be combined with classical cryptography both for secure communication and secret key distribution. Throughout the talk we shall identify a number of research challenges deemed relevant towards the applicability of network coding in contemporary communication networks. Joint work with Rui Costa, Luisa Lima, Paulo Oliveira, João Paulo Vilela, and Muriel Médard (MIT).

24th April 2008

UTM Lab Meeting: A Protocol for Event Distribution in Next-Generation Dynamic Networks

With the increasing number of devices carried by users and the emergence of more dynamic network scenarios, new solutions have to be developed to support ubiquitous communications. The need for dynamic and transparent auto-configuration and adaptation of applications, devices and networks of devices to a wide variety of events is one of the major challenges. This paper presents a protocol to be used with notification systems, to support the registration, subscription and distribution of generic events among heterogeneous and independent entities, thus addressing the requirements of future communication scenarios.

22nd April 2008

UTM Lab Meeting: Multichannel Audio Coding for Wave Field Synthesis

In this talk, I will present a non-parametric method for compressing multichannel audio data for reproduction through Wave Field Synthesis.

18th April 2008

UTM Lab Meeting: Algorithms for DSP implementation in Coherent Optical Systems

Coherent optical communications have gained renewed interest due to the availability of high speed digital signal processing, low priced components as well as partly relaxed receiver requirements at high data rates. When the outputs of a coherent homodyne receiver are sampled at the Nyquist rate, the digitized waveform contains full information of the electric field, preserving the amplitude, phase and polarization from the optical domain to the electrical domain, enabling new potential of multi-level signaling (M-ary PSK and M-ary QAM modulation), as well as the possibility of exploring polarization multiplexing. Additionally, it enables quasi-exact compensation of linear transmission impairments such as Chromatic Dispersion (CD) and Polarization Mode Dispersion (PMD) by a linear filter. Digital Signal Processors (DSP) has been evolving as a practical solution for robust optical long-haul transmission, and it is expected that data converters will be able to satisfy the required high sampling rates in the near future. We will present the computer simulations results of algorithms for compensation of CD and PMD in a coherent optical system exploiting polarization multiplexing. The benefits of combining a phase estimation algorithm with a decision directed least-mean-square equalizer in a feedback configuration will be shown.

03rd April 2008

UTM Lab Meeting: Global Mobility Management in Multi-access Networks

20th March 2008

UTM Lab Meeting: Delay Tolerant Networking

06th March 2008

Jornada "Innovation Relay Centre Network - Apoio à Internacionalização"

O Centro Português de Inovação (www.port-inova.com) é um consórcio do qual o INESC-Porto (www.inescporto.pt) faz parte e têm como missão promover a inovação empresarial por via da transferência transnacional de tecnologia.

17th December 2007

Palestra de Martin Kaltenbrunner sobre "Reactable"

O “reactable” é um instrumento electrónico de cooperação com uma interface tangível de multi-toque que se assemelha ao tampo de uma mesa.

14th December 2007

Conferência MANUFUTURE 2007

Conferência MANUFUTURE 2007 - Construindo uma Europa Sustentavelmente Competitiva - a realizar de 2 a 4 de Dezembro no Porto

04th December 2007

CIBlend07

Workshop Internacional sobre Combinação entre Teoria e Prática na Informática para a Comunidade. 27 e 28 de Novembro no INESC Porto, Porto (Portugal).

28th November 2007

Ciência 2007 - Encontro público com a Ciência

O INESC Porto participou na iniciativa Ciência 2007 - Encontro Público com a Ciência, organizada pela Ciência Viva, que decorreu no dia 14 de Abril no Pavilhão do Conhecimento, no Parque das Nações, em Lisboa.

14th April 2007

INESC Porto participa na feira CEBIT

O INESC Porto esteve presente no brokerage.

21st March 2007