19 documents found, page 1 of 2
Building an IoT platform based on service containerisation
Antunes, Mário; Santiago, Ana Rita; Manso, Sérgio; Regateiro, Diogo; Barraca, João Paulo; Gomes, Diogo; Aguiar, Rui LIoT platforms have become quite complex from a technical viewpoint, becoming the cornerstone for information sharing, storing, and indexing given the unprecedented scale of smart services being available by massive deployments of a large set of data-enabled devices. These platforms rely on structured formats that exploit standard technologies to deal with the gathered data, thus creating the need for carefully ...
Network interfaces flying over IP networks
Brito, Alexandre; Aguiar, Rui L; Barraca, João PauloWe propose a novel method to export both interface control and data planes across different hosts, effectively enabling hardware specific control of network interfaces over the Internet, or from a host to its virtualized guests. Our solution is a major step towards distributed environments of heterogeneous communication systems, particularly relevant in the scope of custom system composition, remote development...
Dynamic jitter accumulation in clock repeaters considering power and ground noi...
Figueiredo, Mónica; Aguiar, Rui LThis paper discusses the mechanism behind dynamic jitter accumulation in clock repeaters, considering the impact of power supply noise correlations. We show that differential and common mode noise have a different impact on jitter accumulation, depending on correlations between cascaded repeater stages. We also propose a simple accumulation model that can be used to replace time-consuming transient noise simula...
Sensor context information for energy-efficient optimization of wireless proced...
Corujo, Daniel; Lebre, Marcelo; Gomes, Diogo; Aguiar, Rui LThe wide deployment of Wireless Local Area Networks (WLAN) we are witnessing today increases connectivity opportunities for mobile terminal devices, such as smartphones. However, continuous scanning for WLAN points of attachment can be a power exhausting mechanism for such battery-powered devices. These mobile devices, besides being equipped with different wireless access interfaces, are also coupled with senso...
A framework for the connectivity of an Internet of things
Corujo, Daniel; Lebre, Marcelo; Gomes, Diogo; Aguiar, Rui LThe evolution of telecommunications has allowed the coupling of networking features to an ever-increasing plethora of devices, enabling their connectivity and berthing of an Internet of Things (IoT). However, the assorted nature of such “things” implies disparate specifications, requirements and interfacing, for interaction with high-level decision modules, services and agents involved in the most distinct kind...
Waypoint Routing: A Network Layer Privacy Framework
Matos, Alfredo; Sargento, Susana; Aguiar, Rui LThis paper presents a routing framework that embeds location and communication privacy into the routing mechanisms. It conceals endpoint identification by introducing waypoints, through encrypted routing hints, where each waypoint has knoweldge of the next hop, assuring network privacy over several waypoints. Based on IPv6 extension headers and Onion Routing techniques, the network waypoints comply with normal r...
AMazING - Advanced Mobile wireless playGrouND
Barraca, João; Gomes, Diogo; Aguiar, Rui LWe describe a wireless testbed composed of 24 wireless nodes that can be used to perform a broad range of studies in the area of next generation networks. This paper addresses the difficulties and constrains faced by the authors throughout the deployment process of such testbed. Flexibility and controllability were key concerns driving the testbed design. The testbed can be remotely managed through a series of ...
QoS-RRC: Integrated QoS routing and resource provisioning mechanism for future ...
Figueiredo, Sergio Miguel Calafate de; Aguiar, Rui L; Neto, Augusto; Maçal, LeandroGeneric Path (GP) is a new connectivity paradigm proposed to facilitate the inclusion of new applications and services abstracting communications between entities, regardless of their location or architectural layer. This paper enhances the GP architecture with a new mechanism integrating QoS-Routing and Resource Control (QoS-RRC) strategies to dynamically control GP session requirements regarding QoS and conne...
Wireless access architectures for video applications: the approach proposed in ...
Badia, Leonardo; Aguiar, Rui L; Banchs, Albert; Melia, Telemaco; Wetterwald, Michelle M; Zorzi, MicheleVideo transmission is expected to be the next big thing in personal communication systems. While text messaging applications have already experienced an explosive growth, the exchange of multimedia content is still lacking architectural solutions which enable it to become the next killer application. The EU project MEDIEVAL (MultimEDia transport for mobIlE Video AppLications) [1] aims at filling this gap. In th...
Over provisioning-centric QoS-routing mechanism for the communication paradigm ...
Neto, Augusto; Figueiredo, Sergio; Aguiar, Rui L; Marçal, Leandro; Freitas, LeandroThe FP7 4WARD clean-slate Project envisions overcoming the limitations of current Internet by redefining it to efficiently support complex value-added sessions and services, such as location-based, health-care, critical-mission, and geo processing. The list of networking innovations from 4WARD’s Future Internet (FI) proposal includes a new connectivity paradigm called Generic Path (GP), a common representation ...