Carolina Fortuna - Academia.edu (original) (raw)

Papers by Carolina Fortuna

Service oriented access in a multi-application, multi-access network environment is faced with th... more Service oriented access in a multi-application, multi-access network environment is faced with the problem of cross-layer interoperability among technologies. In this demo, we present a knowledge base (KB) which contains local (user terminal specific) knowledge that enables pro-active network selection by translating technology specific parameters to higher-level, more abstract parameters. We implemented a prototype which makes use of semantic technology (namely ResearchCyc) for creating the elements of the KB and uses reasoning to determine the best access network. The system implements technology-specific parameter mapping according to the IEEE 802.21 draft standard recommendation.

Several alternatives for more efficient spectrum management have been proposed over the last deca... more Several alternatives for more efficient spectrum management have been proposed over the last decade, resulting in new techniques for automatic wideband spectrum sensing. However, while spectrum sensing technology is important, understanding, using and taking actions on this data for better spectrum and network resource management is at least equally important. In this paper, we propose a system that is able to automatically detect wireless spectrum events from streaming spectrum sensing data, and enables the consumption of the events as they are produced, as a statistical report or on a per-query basis. The proposed system is referred to as spectrum streamer and is wireless technology agnostic, scalable, able to deliver actionable information to humans and machines and also enables application development by custom querying of the detected events.

Since the emergence of wireless communication networks, quality aspects of wireless links have be... more Since the emergence of wireless communication networks, quality aspects of wireless links have been among the main focus of many studies. The analysis of the rich body of existing literature on link quality estimation that uses models built from data traces indicates that the techniques used for modeling are becoming increasingly complex. Several recent estimators use machine learning techniques that require a complex design and development process, and each step of this process has the potential to significantly impact the final performance. The aim of this paper is to provide an in-depth study of how each step in the process of designing and developing a link quality estimator based on machine learning techniques affects its overall performance. Based on the analysis of the state-of-the-art, we selected a representative subset of machine learning models used in the literature and a representative publicly available dataset. We then performed a systematic study on the influence of ...

Contractual date of delivery: 31-12-2016 Actual date of delivery: 23-12-2016 Beneficiaries: IMEC,... more Contractual date of delivery: 31-12-2016 Actual date of delivery: 23-12-2016 Beneficiaries: IMEC, TCD, CNIT, TUB, NCENTRIC, RUTGERS, SNU Lead beneficiary: TCD Authors: Diarmuid Collins (TCD), Maicon Kist (TCD), Alextian Bartholomeu Liberato (TCD), Ingrid Moerman (IMEC), Peter Ruckebusch (IMEC), Spilios Giannoulis (IMEC), Pieter Becue (IMEC), Anatolij Zubow (TUB), Mikolaj Chwalisz (TUB), Piotr Gawłowicz (TUB), Ilenia Tinnirello (CNIT), Pierluigi Gallo (CNIT), Domenico Garlisi (CNIT), Robin Leblon (NCENTRIC), Sven Zehl (TUB, Changmok Yang (SNU), Sunghyun Choi (SNU) Reviewers: Mitch De Geest (NCENTRIC) and Ivan Seskar (RUTGERS) Work package: WP2 – General Requirements and Showcases Estimated person months: 6 Nature: R Dissemination level: PU Version: 1.0 Abstract: This public deliverable reports on the results of the second set of showcases that have been implemented. It also includes the specifications of the third set of showcases to be implemented by the end of Year 3. This delivera...

2018 European Conference on Networks and Communications (EuCNC), 2018

The adoption of social coding platforms among software developers is particularly high because it... more The adoption of social coding platforms among software developers is particularly high because it increases collaboration and productivity as well as code re-use. On the other hand research testbeds do not generally have such high adoption rate. The learning curve of adopting new technology represents an initial drop in performance before it increases. However this effect is unexpected by many users and there is a risk that they will abandon new technology before their performance increases. The main contribution of this paper is to introduce methodology to take advantage of the high adoption rate of social coding platforms to improve the adoption of research testbeds. The proposed approach is that a social coding platform serves as a common gateway to various testbeds since it is something many developers are comfortable with and thus the initial effort needed to start using the testbed is decreased and the probability that experimenters continue to use a testbed is higher.

2015 IEEE Global Communications Conference (GLOBECOM), 2014

Abstract-In this paper we propose an architecture for fullyreconfigurable, plug-and-play wireless... more Abstract-In this paper we propose an architecture for fullyreconfigurable, plug-and-play wireless sensor network testbed. The proposed architecture is able to reconfigure and support easy experimentation and testing of standard protocol stacks (i.e. uIPv4 and uIPv6) as well as non-standardized clean-slate protocol stacks (e.g. configured using RIME). The parameters of the protocol stacks can be remotely reconfigured through an easy to use RESTful API. Additionally, we are able to fully reconfigure clean-slate protocol stacks at run-time. The architecture enables easy set-up of the network - plug - by using a protocol that automatically sets up a multi-hop network (i.e. RPL protocol) and it enables reconfiguration and experimentation - play - by using a simple, RESTful interaction with each node individually. The reference implementation of the architecture uses a dual-stack Contiki OS with the ProtoStack tool for dynamic composition of services.

2015 IFIP/IEEE International Symposium on Integrated Network Management (IM), 2015

Spectrum sensing is one of the core functionalities of a true cognitive radio (CR) that supports ... more Spectrum sensing is one of the core functionalities of a true cognitive radio (CR) that supports operation over a broad range of frequencies and can autonomously adapt transmission parameters to the operating environment. There are several types of hardware ranging from sophisticated (i.e. Nutaq Radio420X FPGA mezzanine card) to low cost (i.e. WiSpy) that can be used to experiment with spectrum sensing. This hardware is available for use in several testbeds across the world (i.e. ORBIT, w-iLab.t, TWIST and LOG-a-TEC). Each testbed provides a specific mechanism to define, deploy and execute experiments making it difficult for an individual researcher to use more than one testbed. In this work we propose an information model for describing spectrum sensing functionality with the ultimate goal of developing and promoting a Common CR language that can describe the resources in existing GENI and FIRE testbeds.

A relatively small number of testbeds based on constrained devices use a wireless management netw... more A relatively small number of testbeds based on constrained devices use a wireless management network, mostly because of the unreliable communication it enables. However, in some cases, such management networks are the only option due to the target location of such testbeds: outdoors, on light posts, buildings, etc. In this paper, we analyze the design trade-offs encountered when designing a wireless management network for testbeds based on constrained devices. First, we identify two use cases and the functionality needed by the management network in supporting them. Next, we discuss ways of providing the desired functionality and illustrate the decisions we took for designing and implementing the management network for the extension of the LOG-a-TEC testbed together with an initial evaluation. The analysis and the adopted decisions resulted in a management network that is separated from the experimental network providing improved application throughput, together with smaller applica...

QMiner is an open source analytics platform for performing large scale data anal-ysis written in ... more QMiner is an open source analytics platform for performing large scale data anal-ysis written in C++ and exposed via a Javascript API. The paper presents five main design elements which focus on focus on storage, online and real-time processing as well as fast prototyping and give QMiner unique advantages as a data analytics platform for processing streams of structured and unstructured data. These design elements are incorporated in a five layer architecture represented by 1) storage and indexing, 2) stream aggregate, 3) feature extractor, 4) linear algebra and 5) analytics layers. The functionality of the platform is demonstrated by three rep-resentative usage examples containing code fragments: text classification, time series prediction and community detection in graphs.

ACM Transactions on Sensor Networks, 2015

We propose a framework for dynamic composition of communication services that is well suited for ... more We propose a framework for dynamic composition of communication services that is well suited for facilitating research and prototyping on real experimental infrastructures of remotely configurable embedded devices. By using the concept of composability, our framework supports modular component development for various networking functions, thereby promoting code reuse. The framework consists of four components: the physical testbed, the module library, the declarative language, and the workbench. Its reference implementation, ProtoStack, developed using semantic web technologies, supports remote experimentation on sensor platform-based infrastructure and is thus well suited also for experimenters who do not possess their own physical experimentation infrastructure. We illustrate how ProtoStack supports research in service-oriented networks and cognitive networking. The cost of increased flexibility and prototyping speed of the protocol stack is paid in terms of increased memory footp...

Signals and Communication Technology, 2014

Having a huge potential to improve the way radio spectrum is being used, the techniques that are ... more Having a huge potential to improve the way radio spectrum is being used, the techniques that are used for the research in cognitive radio are maturing and therefore move from being evaluated in a simulation environment to more realistic environments such as dedicated testbeds. In this chapter we describe our experiences with the design, deployment and experimental use of the LOG-a-TEC embedded, outdoor cognitive radio testbed, based on the VESNA sensor node platform. We describe the choice of experimental low-cost reconfigurable radio frontends for LOGa-TEC and discuss the potential capabilities of custom designs. The core part of this chapter gives practical experiences with designing the embedded testbed infrastructure, covering topology design and performance evaluation of the management network as well as our considerations in the choice of network protocols employed in the LOG-a-TEC testbed. Finally, we provide two use cases where the LOG-a-TEC testbed has been used for performing experiments with cognitive radio, one relevant to the investigation of coexistence of primary and secondary users in TV white spaces and the other addressing power allocation and interference control in the case of shared spectrum.

Lecture Notes in Computer Science, 2015

Detection rules represent one of the components of the rule models in event processing systems. T... more Detection rules represent one of the components of the rule models in event processing systems. These rules can be discovered from data using data mining techniques or domain experts' knowledge. We demonstrate a system that provides its users the means for creating and validating such rules. The system is applied on real-life environmental scenarios, where the main source of data comes from sensors. Based on historical data about events of interest, the scope is to formulate rules that could have caused these events. Using a scalable infrastructure the rules can be tested on massive amount of data in order to observe how past events would fit to these rules. In addition, we create semantic annotations of the dataset and use them in the system outputs in order to support interoperability with other systems.

2014 11th International Symposium on Wireless Communications Systems (ISWCS), 2014

EURASIP Journal on Wireless Communications and Networking, 2015

Wireless sensor networks (WSNs) are one of the fastest changing ICT related areas both in industr... more Wireless sensor networks (WSNs) are one of the fastest changing ICT related areas both in industry and research fields, having a big impact on modern society. Nevertheless, designing a WSN requires considering a set of constraints and low energy is one of the most important of them [1]. From previous approaches we saw that the energy efficiency issue is addressed at different levels, including MAC and network protocols, physical layer communication, operating system, algorithms, etc. All these should be able to dynamically adapt in order to minimize power consumption [2]. Therefore, several optimizations have been proposed such as adaptive modulations and power, MAC protocols such as T-MAC, S-MAC, B-MAC, power aware routing algorithms like SPIN or LEACH, etc [2].

Networks based on HAPs will have both access and transport interfaces. In this paper we deal with... more Networks based on HAPs will have both access and transport interfaces. In this paper we deal with the design of an optical transport network (OTN) for HAP based networks, namely with the dimensioning, analysing and evaluating the performance of such a network. A simulation tool that implements several routing and wavelength assignment algorithms for wavelength-routed networks was built. Simulations showed that a good routing algorithm combined with a simple wavelength assignment policy can significantly reduce the blocking. For large networks, such as the 35 node European network, double (multi) hop routing is necessary in order to fully interconnect the nodes of the network.

... &amp; Sons, 2007, pp. 34. ISBN: 9780470061961. [15] 1. McNair, F. Zhu, &quot;... more ... &amp; Sons, 2007, pp. 34. ISBN: 9780470061961. [15] 1. McNair, F. Zhu, &quot;Verticalhandoffs in fourth-generation multinetwork environments&quot;, IEEE Wireless Communications, Vol. 11, Issue 3, pp. 8-15, June 2004. [16] M. Mani, N ...

Web Of Things • What is it? What problems can it solve? Architectural considerations • How it loo... more Web Of Things • What is it? What problems can it solve? Architectural considerations • How it looks like? What are its components? The "Things" • What are the ingredients? The "Glue" • How do things stick together? Applications and services • What can be built on top of it? Quick start recipes • How does the "Hello World!" look like? Part I. Motivation & background outline 9 How Web-of-things fits on the map? 10 Description Technologies Web 1.0 Static HTML pages (web as we first learned it) HTML, HTTP Web 1.5 Dynamic HTML content (web as we know it)