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Pietro Camarda
Ruolo
Professore Ordinario
Organizzazione
Politecnico di Bari
Dipartimento
Dipartimento di Ingegneria Elettrica e dell'Informazione
Area Scientifica
Area 09 - Ingegneria industriale e dell'informazione
Settore Scientifico Disciplinare
ING-INF/03 - Telecomunicazioni
Settore ERC 1° livello
PE - Physical sciences and engineering
Settore ERC 2° livello
PE7 Systems and Communication Engineering: Electrical, electronic, communication, optical and systems engineering
Settore ERC 3° livello
PE7_8 - Networks (communication networks, sensor networks, networks of robots, etc.)
Long-term evolution represents an emerging technology that promises a broadband and ubiquitous Internet access. But several aspects have to be considered for providing effective multimedia services to mobile users. In particular, in this work, we consider the design of a quality-of-service (QoS) aware packet scheduler for real-time downlink communications. To this aim, a novel two-level scheduling algorithm is conceived. The upper level exploits an innovative approach based on discrete-time linear control theory. Instead, at the lower level, a proportional fair scheduler has been properly tailored to our purposes. The performance and the complexity of the proposed scheme have been evaluated both theoretically and by using simulations. A comparison with recently proposed scheduling strategies has been also presented, considering several network conditions and real-time multimedia flows. Particular attention has been devoted to the evaluation of the quality-of-experience (QoE) provided to end users. Results have clearly shown that the proposed approach is able to greatly outperform the existing ones especially in the presence of real-time video flows.
Space system vendors seek for solutions to deliver small size and cost-effective sensor systems to “de-congest” satellite payloads, drastically reduce the equipment cost and open the possibility for new generation of micro-payload systems. MERMIG aims to provide this technology replacing current expensive, bulky, heavy and power-consuming fiber optic gyroscopes (FOGs). To address these key challenges, MERMIG invests in the right mix of silicon photonic CMOS-compatible component fabrication and nano-imprint lithography laser fabrication. Both technologies are being adopted by the terrestrial telecom market and MERMIG will develop them for bringing their unique advantages into space sensor systems. MERMIG will squeeze the bulky FOG into a couple of cm2, integrating a racetrack cavity, pin junctions and a phase decoder into compact sub-micron waveguides. The MERMIG “smart” packaging technique will allow power-efficient optical pumping and hermetic packaging of the gyro-photonic chip. MERMIG will develop the first 1550nm high-power laser with a fiber-coupled power of 150mW using an integrated laser MOPA, fabricated with advanced nano-imprint lithography (NIL). The 150mW delivered will enable a modular architecture, with pump sharing among 3 integrated silicon lasing cavities, for 3-axis sensing. The single-step NIL process enables fast wafer scale patterning and ensures low-cost and high-volume laser production. Finally, MERMIG will bring together photonics and electronics on a fully-functional opto-electronic gyroscope system prototype characterized according to ASTRIUM testplan procedures. MERMIG will deliver to ASTRIUM a new generation gyroscope that will weigh <1kg, consume <5W electrical power in a few cm3 footprint. The angle random walk range that will be feasible within MERMIG is 0.1 – 0.01 deg/sqrt(hr) suitable for telecommunications and scientific satellites. The technology full potential can allow for future opto-electronic integration of photonic “gyroscopes-on-a-chip”.
Il problema della tutela della salute umana e degli interessi dei consumatori in relazione ai prodotti agrolimentari è, nell’ambito della Comunità Europea, di particolare interesse e attualità. Il regolamento europeo in materia stabilisce tra l’altro che sia possibile la rintracciabilità degli alimenti in tutte le fasi della loro produzione, trasformazione e distribuzione. Pertanto, tali beni devono essere opportunamente etichettati e i processi, nei quali sono coinvolti, devono consentire e/o facilitare l’operazione di tracciatura. Questo problema è particolarmente sentito nell’ambito della regione Puglia, per la presenza sul territorio di numerose imprese operanti nel campo agroalimentare che è di particolare importanza nell’economia locale. L’adeguamento alle normative europee da parte di tali imprese è necessario non solo per garantire la sicurezza dei consumatori nel rispetto della legge, ma anche per mantenere elevata la qualità dei prodotti nell’ambito di un mercato europeo sempre più competitivo. In questo contesto, il presente progetto ha come obiettivo generale lo studio e la sperimentazione di tecnologie atte a consentire localizzazione e identificazione di beni/prodotti equipaggiati con etichette RFID (Radio Frequency Identification). Tali tecnologie sono applicabili dal punto di vista concettuale a qualsiasi tipo di bene o prodotto, ma è richiesta la caratterizzazione dei beni/prodotti attraverso dati che qualifichino e quantifichino i loro attributi e che vengano memorizzati sui tag RFID. Pur essendo le tecnologie considerate mutuabili e trasferibili, ciascun dominio relativo ad un bene/prodotto è caratterizzato da una specifica ontologia per descrivere i dati on board sui tag.
A method of downloading a multimedia content from a server (110) to a client (105) through a wireless communication network (100) is proposed. The multimedia content is subdivided into a plurality of portions (cki) and for each portion the server storing a plurality of versions (seg i,j ) thereof each of which is encoded with a specific encoding quality (br i,j ). The method comprises: selecting, among the plurality of versions (seg i,j ) of each portion (ck i ) of the multimedia content, a version (seg i,j ) of said portion (ck i ) of the multimedia content to be downloaded on the basis of wireless communication parameters determined at at least two different layers of a wireless communication network OSI protocol stack at the client (105).
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