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2005 Conference object Unknown

Adaptative optimal bandwidth partitioning among TCP elephant connections over multiple rain-faded satellite channels
Celandroni N., Davoli F., Ferro E., Gotta A.
The assignment of a common bandwidth resource to TCP connections over a satellite channel is considered in the paper. The connections are grouped according to their source-destination pairs, corresponding to up- and down-link channels traversed, and each group may experience different fading conditions. By exploiting the tradeoff between bandwidth and channel redundancy (as determined by bit and coding rates) in the maximization of TCP goodput, an overall optimization problem is constructed, which can be solved by numerical techniques. Different relations between goodput maximization and fairness of the allocation are investigated. The allocation strategies are tested and compared in a real dynamic fading environment.Source: International Workshop on QoS in Multiservice IP Networks QoS - IP, pp. 559–573, Catania, Italy, 2-4 February 2005

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2006 Bachelor thesis Unknown

Meccanismi di astrazione e generazione automatica di codice per un estensione UPnP del framework OSGi
Lenzi S.
Il tirocinio si inserisce nel contesto di un progetto denominato NICHE [1](Natural Interaction in Computerised Home Enviroment)che ha come obiettivo lo studio delle interazioni uomo macchina all'interno di ambienti domestici. In figura 1 e? riportata per grandi linee l'architettura del sistema utilizzato nel progetto: partendo dal basso sono rappresentate le risorse presenti nella casa. Tali risorse sono principalmente dispositivi di nuova generazione che possono essere collegati in rete per ricevere o inoltrare messaggi di controllo. I vari dispositivi sono aggregati per mezzo di uno strato software basato su un modello a componenti ( OSGi framework [2], Open Service Gateway Initiative ) che e? possibile estendere in modo incrementale. Sopra tale strato si colloca un ulteriore livello di astrazione per la descrizione ed invocazione dei comandi, ed in fine, uno strato dedicato all'interpretazione del linguaggio naturale in grado di gestire l'interazione con l'utente tramite dialogo. In tale ambito il tirocinio ha lo scopo di integrare una classe di dispositivi basata sulla tecnologia UPnP[3] con il framework OSGi che rappresenta il middleware su cui si basano i livelli applicativi del sistema sviluppato nel progetto NICHE.

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2008 Conference object Unknown

Robust and efficient authentication of satellite broadcasted video streams
Oligeri G.
Every day large amounts of video data are distributed throughout satellite multi- cast networks. However, popular video editing software versions permit today to easily tamper with video contents, thus making video authenticity no more reli- able. For this reason, several methods have been designed for verifying the originality of video contents and preventing forgery. In order to be effective, authentication methods should guarantee both source authentication, which al- lows for a recipient to verify the origin of the contents, and non repudiation of the origin, which allows for the recipient to prove the origin of the data to a third party. A novel authentication scheme that leverages satellite link characteristics such as low bit error rate and no packet reordering is presented. The approach com- bines digital watermarking of video stream and signature amortization. In par- ticular, received video pictures can be authenticated on the fly and no storage is required on the receiver side, the computation overhead experienced on receiver sums up to two hash per block of pictures, and only one digital signature verifi- cation for the whole received stream. There is no bandwidth overhead, since authentication information is embedded in the video stream by means of a wa- termarking technique that introduces negligible quality perturbations on the original video stream. The proposed authentication procedure is validated by means of an extensive simulation campaign, using well known video samples, in which we considered the trade off between video quality degradation (PSNR) and MPEG-2 coding de- coding robustness. Simulation results show the effectiveness of the proposal.Source: Workshop di Dottorato 2008, Pisa, Italy, 14/11 2008

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2013 Article Open Access OPEN

AAL middleware infrastructure for green bed activity monitoring
Palumbo F., Barsocchi P., Furfari F., Ferro E.
This paper describes a service oriented middleware platform for Ambient Assisted Living and its use in two different bed activity services: bedsore prevention and sleeping monitoring. A detailed description of the middleware platform, its elements and interfaces, as well as a service that is able to classify some typical user's positions in the bed are presented. Wireless Sensor Networks (WSN) are supposed to be widely deployed in indoor settings and on people's bodies in tomorrow's pervasive computing environments. The key idea of this work is to leverage their presence by collecting the Received Signal Strength (RSS) measured among fixed general purpose wireless sensor devices, deployed in the environment, and a wearable one. The RSS measurements are used to classify a set of user's positions in the bed, monitoring the activities of the user, and thus supporting the bedsores and the sleep monitoring issues. Moreover, the proposed services are able to decrease the energy consumption by exploiting the context information coming from the proposed middleware.Source: Journal of Sensors (Online) Online First 18 March 2013 (2013). doi:10.1155/2013/510126
DOI: 10.1155/2013/510126
Project(s): GIRAFF+ via OpenAIRE, UNIVERSAAL via OpenAIRE

See at: Journal of Sensors Open Access | Journal of Sensors Open Access | Journal of Sensors Open Access | Unknown Repository Restricted | DOI Resolver | CNR People | www.hindawi.com


2017 Part of book or chapter of book Unknown

Energy and environmental long-term monitoring system for inhabitants' well-being
Barsocchi Paolo, Crivello Antonino, Mavilia Fabio, Palumbo Filippo
The increasing demand for building services and comfort levels, together with the increased time spent inside buildings, assures an upward trend in long-term monitoring system demand for the future. In this paper, we present the work done for designing added value human well-being services starting from a state-of-the-art continuous data gathering infrastructure. The paper presents the proposed energy and environmental long-term monitoring system that is able to measure both the energy consumed by end users and the environmental parameters in office environments. The paper shortly describes the general idea, then it focuses on the work done to create a well-being service on the top of the data gathering layer. In particular, it dwells on the deployment approach focusing on the description of the long-term monitoring system and providing preliminary results of the proposed real-time social interactions algorithm.Source: , pp. 91–108. Amsterdam: IOS Press, 2017
DOI: 10.3233/978-1-61499-804-4-91

See at: DOI Resolver | CNR People | www.scopus.com


2014 Article Open Access OPEN

A numerical method for imaging of biological microstructures by VHF waves
Ala G., Cassarà P., Francomano E., Ganci S., Caruso G., Gallo P. D.
Imaging techniques give a fundamental support to medical diagnostics during the pathology discovery as well as for the characterization of biological struc- tures. The imaging methods involve electromagnetic waves in a frequency range that spans from some Hz to GHz and over. Most of these methods involve scanning of wide human body areas even if only small areas need to be analyzed. In this paper, a numerical method to evaluate the shape of micro-structures for application in the medical field, with a very low in- vasiveness for the human body, is proposed. A flexible thin-wire antenna radiates the VHF waves and then, by measuring the spatial magnetic field distribution it is possible to reconstruct the micro-structures image by es- timating the location of the antenna against a sensors panel. The typical inverse problem described above is solved numerically, and first simulation results are presented in order to show the validity and the robustness of the proposed approach.Source: Journal of computational and applied mathematics 259 (2014): 805–814. doi:10.1016/j.cam.2013.07.020
DOI: 10.1016/j.cam.2013.07.020

See at: Repertorio Competenze e Ricerche Open Access | DOI Resolver | CNR People | www.sciencedirect.com


2012 Part of book or chapter of book Unknown

EvAAL, Evaluating AAL systems through competitive benchmarking, the experience of the 1st competition
Salvi D., Barsocchi P., Arredondo M. T., Làzaro Ramos J. P.
As Ambient Assisted Living (AAL) emerges as a need for our ageing societies, many barriers are still in place against its wide adop- tion. One of the main issues related to the creation of an AAL market is the lack of consensus around well established technologies which should e ectively cover real needs of the population. EvAAL (Evaluating AAL Systems Through Competitive Benchmarking) is a newborn initiative aimed at evaluating solutions related to Ambient Assisted Living by or- ganizing annual international competitions. Its main objectives are the creation of a community of stakeholders around AAL and the creation of metrics and benchmarks for both innovative prototypes and commer- cial solutions. EvAAL focuses not only on comparison of algorithms or speci c hardware issues, but also of user acceptance, deployment and installation e ort, integrability, etc. In its rst versions, the competition is focusing on speci c technical aspects of AAL but aims, in the near future, at joining heterogeneous "ambient" technologies in a common evaluation framework. In July 2011, the rst EvAAL competition took place in Valencia, Spain, on Indoor Localization and Tracking for AAL. This paper describes how EvAAL is designed, its principles and how it is internally organized, and goes though an evaluation of this structure though the experience gained during the first competition.Source: Evaluating AAL Systems Through Competitive Benchmarking. Indoor Localization and Tracking, edited by Stefano Chessa, Stefan Knauth, pp. 14–25. Berlin: Springer, 2012
DOI: 10.1007/978-3-642-33533-4
Project(s): UNIVERSAAL via OpenAIRE

See at: DOI Resolver | link.springer.com | CNR People


2007 Conference object Unknown

Frame error model in rural (Wi-Fi) networks
Barsocchi P., Oligeri G., Potortì F.
Source: 5th International Symposium on Modeling and Optimization in Mobile, Ad Hoc, and Wireless Networks. WIOPT 2007, Limassol, Cipro, 2007

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2006 Article Unknown

Guest editorial - Selected papers from WMAN'04
Bertossi A. A., Boukerque A., Pinotti M. C.
The rapid and continued growth of wireless technology made information accessible anywhere and at any time. In addition to wireless networks based on a pre-existing infrastructure, where wireless communications take place only between the end-nodes and the access points, mobile ad hoc networks and sensor networks are emerging rapidly. Such networks pose challenges in several distinct areas such as network topology control, media access, routing, energy consumption, security, and data broadcast scheduling.Source: Wireless networks 12 (2006): 669–670.

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2010 Report Unknown

Modeling systematic upper layer FEC codes and interleaving in land mobile satellite channel
Celandroni N., Gotta A.
This work provides an analytical model for evaluating the performance of upper layer forward error correction (FEC) when used together with interleaving on land mobile satellite channels, in terms of residual (after decoding) packet loss rate. In addition, simulations highlight the overheads introduced by this technique, which depend on the channel statistics, in terms of additional packet delivery delay, bandwidth consumption, and computation power required. In fact, we will show why the interleaver is mandatory in some environments, due to the severe disruptive characteristics of the channel, according to measurement campaigns promoted by European Space Agency. This model differs from related works, since it provides the exact residual loss rate on information packets, when systematic FEC coding blocks are interleaved at packet level (i.e. when a cyclic redundancy check and a sequence number identify a precise data unit). The derived analytical model can be employed for performance evaluation of recent and future mobile communication systems that take advantage of upper layer FEC and interleaving techniques.

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2014 Report Unknown

ZigBee device service specification V.50.
Bottaro A., Rinquin A., Poutcheu J., Blache F., Demottie C., Chazalet A., Grigorov E., Portinaro N., Lenzi S.
This specification defines the Java API to discover, control and implement ZigBee devices on the OSGi platform and according to OSGi service design patterns. This API maps the representation of ZigBee entities defined by ZigBee Cluster Library into Java classes. OSGi service design patterns are used on the one hand for dynamic discovery, control and eventing of local and networked devices and on the other hand for dynamic network advertising and control of local OSGi services implementing this API.

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2014 Report Unknown

ZigBee Device Service Specification. V. 51.
Bottaro A., Rinquin A., Poutcheu J., Blache F., Demottie C., Chazalet A., Grigorov E., Portinaro N., Lenzi S.
This specification defines the Java API to discover, control and implement ZigBee devices on the OSGi platform and according to OSGi service design patterns. This API maps the representation of ZigBee entities defined by ZigBee Cluster Library into Java classes. OSGi service design patterns are used on the one hand for dynamic discovery, control and eventing of local and networked devices and on the other hand for dynamic network advertising and control of local OSGi services implementing this API.

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2007 Conference object Unknown

Proposal of a reliable multicast protocol in a HAP-satellite architecture
Alocci I., Berioli M., Celandroni N., Giambene G., Karapantazis S.
Terrestrial and satellite networks have dominated the telecommunications arena for years. In parallel with these two well-established technologies, a new alternative based on plat- forms located in the stratosphere, termed High Altitude Platforms (HAP's), has gained considerable interest in the past few years. In this paper, we consider an integrated HAP-satellite architecture and propose a reliable multicast protocol that capitalizes upon the HAP-layer to perform local retransmissions. Our protocol relies on a progressive packet-level Forward Error Correction (FEC) scheme. The performance of this multicast protocol has been supported thorough the comparison with a theoretical bound in the literature.Source: IEEE 65th Vehicular Technology Conference. VTC2007, Dublin, Ireland, 23-25 aprile 2007

See at: ieeexplore.ieee.org | CNR People


2004 Conference object Unknown

Connectivity properties of secure wireless sensor networks
Di Pietro R., Mancini L. V., Mei A., Panconesi A., Radhakrishnan J.
We address the problem of connectivity in Secure Wireless Sensor Networks (SWSN) using random pre-distribution of keys. We propose a geometric random model for SWSNs. Under this new and realistic model, we describe how to design secure and connected networks using a small constant number of keys per sensor. Extensive simulations support the above stated result and demonstrate how connectivity can be guaranteed for a wide interval of practical network sizes and sensor communication ranges.Source: 2nd ACM workshop on Security of ad hoc and sensor networks, pp. 53–58, Washington, US, October 2004

See at: portal.acm.org | CNR People


2008 Conference object Unknown

SAIL: a sensor abstraction and integration layer for context awareness
Chessa S., Furfari F., Girolami M., Lenzi S.
Wireless Sensor Networks (WSN) are an important technological support for ambient assisted applications. Up to now most WSN applications are based on ad hoc solutions, and attempts to provide reusable applications are still in their youth. Under this trend of research we propose a layered architecture called SAIL (Sensor Abstraction and Integration Layers) to be used in context aware architectures, and aimed at integrating WSN as context information sources. In the proposed approach, the applications running on WSN can be exposed using either a node centric or a data centric paradigm, and they are interfaced with different access technologies. SAIL is currently encapsulated within the OSGi framework and has been tested on MICAz motes.Source: SEAA'08. 34th EUROMICRO Conference on Software Engineering and Advances Applications - Special Session on Software Architecture for Pervasive Systems (SAPS), pp. 374–381, Parma, Italy, 03-05 September 2008
DOI: 10.1109/SEAA.2008.30

See at: DOI Resolver | ieeexplore.ieee.org | CNR People


2005 Conference object Unknown

Resource partitioning and call admission control in a rain faded satellite channel with real-time connections
Gotta A.
The paper aims at devising a control system for dynamic resource allocation in a multi-service satellite network with real-time and streaming connections. A Master Station adaptively partitions the overall satellite capacity among the earth stations, according to their traffic load and fading conditions. Within the bandwidth temporarily assigned, the stations independently perform Call Admission Control (CAC) of real-time connection requests and assign the proper redundancy to overcome the fading effects. Thus, there is a double cross-layer interaction between the physical and data link layers, whereby the fading severity plays a role in the overall bandwidth allocation. The performance of the method is analyzed by simulation, under a realistic link budget and real fading patterns.Source: 2nd International Symposium on Wireless Communication Systems (ISWCS'05), pp. 865–869, Siena, Italy, 5-9 September 2005

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2011 Report Unknown

UniversAAL - execution environment installation packages and hardware abstraction
Furfari F.
Deliverable 2.1 mainly consists of software that is supposed to create the basic collaborative environment based on which different resources embedded within or otherwise distributed throughout an AAL space can communicate on a secure basis. The development of this software is organized within Task 2.1 "Create the universAAL Execution Environment and Hardware Abstraction Layer". D2.1 also consists of a report that provides an overview of the work done in Task 2.1 towards the development of the targeted software.Project(s): UNIVERSAAL via OpenAIRE

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2004 Report Unknown

Comparison of FEC types to optimise the efficiency of TCP connections over AWGN satellite channels
Celandroni N.
The optimization of the end-to-end throughput of a TCP connection over geostationary satellite links is a challenging research topic. This is because the high delay-bandwidth product, together with a non-negligible random loss of packets, are conditions which differ considerably from the original environment for which TCP was originally designed. As a result TCP performance is significantly impaired by the channel bit error rate. The literature is full of suggestions for improving TCP goodput, most based on modifications of the protocol itself. We only investigated the application of different FEC (forward error correction) types for TCP goodput optimization, leaving the end-to-end protocol unaltered. Using a method midway between analysis and simulation to evaluate the throughput of a TCP long-lived connection, we first disprove the widely-held opinion that the packet loss rate, introduced by errors on the channel, should be negligible with respect to that caused by congestion. We then compare physical-level FEC techniques, such as convolutional encoding/Viterbi decoding, Reed Solomon, link-level erasure codes and their combinations, over a wide field of signal to noise conditions of the satellite channel. Furthermore, the case of multiple TCP connections sharing the same link is presented as well.

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2013 Article Unknown

EvAAL Evaluation workshop
Potortì F.
For the third consecutive year, the Wireless Networks laboratory of the Institute of Information and Technologies (ISTI) of the Italian National Research Council (CNR) was the main organising force behind the EvAAL competition, an effort financed by the universAAL FP7 project and embedded into the AALOA association.Source: ERCIM news 96 (2013): 54–54.
Project(s): The study of interactions and mechanisms that allow nuclear FGF-2 to act as a survival factor in cancer metastasis

See at: ercim-news.ercim.eu | CNR People


2011 Report Unknown

SatNEx III - WSN-satellite network architecture and scenarios (TN 2.1)
Roseti C., Luglio M., De Cola T., Marchitti M. A., Ferro E., Celandroni N., Gotta A., Oligeri G., Vassaki S., Poulakis M., Panagopoulos A. D., Hu Y., Pillai P., Verma S., Xu K. Bisio I., Cello M., Davoli F.
The aim of this Technical Note (TN) is to provide an overview of the potential role of the satellite in future wireless sensor networks (WSN). TN includes a study of possible architectures for the interworking between WSNs and satellite, addressing the relevant issues in terms of both performance and security. The main achievement is the identification of three satellite-WSN meaningful scenarios, which will be the baseline for activities of Task 2.1Project(s): 4WARD via OpenAIRE

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