Combining Web 2.0 and Web Services in Collaborative Working Environments

Collaborative applications offer significant benefits in business sector. Usually, team members need to use several systems to carry out their tasks. What these users need is an environment which permits them to carry out these tasks automatically, considering the flow of information between the different systems and offering interoperability and composition features. Nowadays, Web Services have gained their prominence in providing these both features. On the other hand, the use of Web 2.0 allows to create web applications in which the user constitutes a key element. What we propose in this paper is the combination of both approaches for creating a Collaborative Working Environment (CWE)

Architecture and evaluation of a unified V2V and V2I communication system based on cellular networks

Vehicle communications are becoming the cornerstone in the future vehicle equipment. More specifically, vehicle to vehicle communications (V2V) are the main object of researching nowadays, because vehicle to infrastructure (V2I) approximations are already being developed as commercial solutions. Cellular networks (CN) are usually applied in V2I solutions, whereas ad hoc networks are practically the only technology considered in V2V communications. Due to fact that CN are currently a reality and the operators are continuously improving the network, this communication technology could be considered as a candidate to deal with V2V necessities as well. The present paper defends the applicability of CN in the V2V field, and presents a novel communication paradigm for vehicles which unifies both V2V and V2I paradigms into one system. A peer to peer network technology has been used over the CN basis to create a group-based communication infrastructure which enables the message propagation among vehicles and between the car and the road side infrastructure. The architecture has been implemented in both hardware and software terms, and multitude of field tests have been carried out, whose main performance results are shown in the paper.The authors would like to thank the Spanish Ministerio the Educacion y Ciencia for sponsoring the research activities under the grant AP2005-1437, in frames of the FPU program, and to the financial support given by the European Spatial Agency (ESA) under the GIROADS 332599 project. Special thanks as well to the Spanish Ministerio the Fomento for its continuous support in vehicular researching

Experimental Analysis of Multi-hop Routing in Vehicular Ad-hoc Networks

International audienceEvaluation of vehicular ad-hoc networks (VANETs) over real environments is still a remaining issue for most re- searchers. There are some works dealing with common 802.11 anal- ysis over real vehicular environments, which carry out performance tests to measure the quality of the communication channel and justify results according to physical and MAC conditions. There are only a few works regarding multi-hop experimentation in this field, and even less (if not none) testing multi-hop protocols. In this paper an integral VANET testbed is evaluated, using 802.11b and a multi-hop network managed by the Optimized Link State Routing protocol (OLSR). Up to four vehicles are used over urban and highway environments to study the VANET performance, and different metrics are used to analyse the results in terms of delay, bandwidth, packet loss and distance between nodes. Furthermore, a deeper analysis is carried out to study the route followed by packets end to end, which enables us to count the number of hops and detect the links where packets are lost. Because a routing protocol is used, results differ from traditional two-hop and static- route tests, presenting a more realistic study. OLSR is considered as a good reference point for the research community, although it is not the most suitable protocol for vehicular environments, as results show

Chapter Quality of Information within Internet of Things Data

Due to the increasing number of IoT devices, the amount of data gathered nowadays is rather large and continuously growing. The availability of new sensors presented in IoT devices and open data platforms provides new possibilities for innovative applications and use-cases. However, the dependence on data for the provision of services creates the necessity of assuring the quality of data to ensure the viability of the services. In order to support the evaluation of the valuable information, this chapter shows the development of a series of metrics that have been defined as indicators of the quality of data in a quantifiable, fast, reliable, and human-understandable way. The metrics are based on sound statistical indicators. Statistical analysis, machine learning algorithms, and contextual information are some of the methods to create quality indicators. The developed framework is also suitable for deciding between different datasets that hold similar information, since until now with no way of rapidly discovering which one is best in terms of quality had been developed. These metrics have been applied to real scenarios which have been smart parking and environmental sensing for smart buildings, and in both cases, the methods have been representative for the quality of the data

Assessment of VANET multi-hop routing over an experimental platform

International audienceEvaluation of vehicular ad-hoc networks (VANETs) over real environments is still a remaining issue for most researchers. There are some works which carry out performance tests to evaluate the communication channel according to physical and MAC conditions. Only a few works deal with multi-hop experimentation in this field, and practically none tests multi- hop protocols. In this paper an integral VANET testbed is evaluated, using 802.11b and a multi-hop network managed by the Optimized Link State Routing protocol (OLSR). Up to four vehicles are used to study the VANET performance over different traffic environments and different metrics are considered to analyse the results in terms of delay, bandwidth, packet loss and distance between nodes. Furthermore, a deeper analysis is carried out to track the routes followed by packets end to end. Since a routing protocol is used, results differ from traditional one-hop and static-route tests, presenting a more realistic study

The Computing Fleet: Managing Microservices-based Applications on the Computing Continuum

In this paper we propose the concept of "Computing Fleet" as an abstract entity representing groups of heterogeneous, distributed, and dynamic infrastructure elements across the Computing Continuum (covering the Edge- Fog-Cloud computing paradigms). In the process of using fleets, stakeholders obtain the virtual resources from the fleet, deploy software applications to the fleet, and control the data flow, without worrying about what devices are used in the fleet, how they are connected, and when they may join and exit the fleet. We propose a three-layer reference architecture for the Computing Fleet capturing key elements for designing and operating fleets. We discuss key aspects related to the management of microservices-based applications on the Computing Fleet and propose an approach for deployment and orchestration of microservices-based applications on fleets. Furthermore, we present a software prototype as a preliminary evaluation of the Computing Fleet concept in a concrete Cloud- Edge scenario related to remote patients monitoring.acceptedVersio

Deploying ITS Scenarios Providing Security and Mobility Services Based on IEEE 802.11p Technology

Botany & plant science

Experiencia con la herramienta de virtualización VNUML para la enseñanza de redes de computadores

La virtualización permite disponer y configurar infraestructuras de red con un coste asumible para un laboratorio y, a diferencia de los simuladores, muestra un comportamiento real del sistema. Este artículo presenta la metodología que seguimos en la asignatura de Redes de la Facultad de Informática de la Universidad de Murcia para la enseñanza práctica de conceptos tales como encaminamiento, movilidad IP, balanceo de carga y alta disponibilidad por medio de la herramienta de virtualización de código abierto VNUML. Para mostrar estos conceptos hemos añadido diversas utilidades al sistema de ficheros utilizado en VNUML. Gracias a estas herramientas, los alumnos han podido mejorar el aprendizaje de estos conceptos como lo refutan las encuestas realizadas.Peer Reviewe

ARIES: Reliable European Identity Ecosystem

An introduction to H2020 funded project ARIES and how, by setting up a ReliAble euRopean Identity EcoSystem, ARIES will provide secure privacy-preserving identity management, effectively reducing the risk of identity fraud and related crime