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Evaluation and Tuning of Gigabit Ethernet performance on ClustersDesai, Harit S. 30 July 2007 (has links)
No description available.
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10 Gigabit Ethernet (10GE) Technologie-EntwicklungenKunze, Rene 15 May 2002 (has links)
Gemeinsamer Workshop von Universitaetsrechenzentrum und Professur Rechnernetze und verteilte Systeme der Fakultaet fuer Informatik der TU Chemnitz.
Technologieentwicklungen bei 10 Gigabit Ethernet (10GE)
Erweiterung des Ethernet-Schichtenmodells bei 10 Gigabit Ethernet
Uebertragungsverfahren auf verschiedenen Glasfasertypen bei verschiedenen Wellenlaengen
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[en] SIGNALS INTEGRITY IN HIGH SPEED PRINTED CIRCUIT BOARDS / [pt] INTEGRIDADE DE SINAIS EM PLACAS DE CIRCUITO IMPRESSO DE ALTAS TAXASVANESSA PRZYBYLSKI RIBEIRO MAGRI 14 February 2008 (has links)
[pt] Este trabalho tem como objetivo avaliar a viabilidade
técnica para fabricação de placas de circuito impresso de
múltiplas camadas com espessuras reduzidas mantendo a
integridade dos sinais que se propagam em conexões inter-
chip,
nas taxas de transmissão de 1Gb/s e 10Gb/s para aplicações
em
redes de comunicações nos padrões 1GB Ethernet e 10GB
Ethernet. A avaliação inclui o projeto de uma placa de 6
camadas
de planos condutores, com espessura total de 1,29mm. A
placa
desenvolvida contém linhas de transmissão, vias e curvas,
microcapacitores , microresistores e conectores I/O
adequados
para a faixa de freqüência em questão. / [en] The main purpose of this work is to evaluate the technical
reliability to fabricate a Printed circuit board (PCB)
with reduced
thickness multilayer keeping signal Integrity on inter-chip
connections in 1Gb/s and 10Gb/s (1GB Ethernet and 10GB
Ethernet network communications). This evaluation includes
the
development of a PCB project with 06 layers and 1,29mm
thickness. The PCB contains several transmission lines,
vias,
bends, microcapacitors, microresistors, connectors (I/O)
suitable
to this frequency band.
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[en] CATV / GIGABIT ETHERNET / DWDM : NEW TECHNICAL AND ECONOMIC ALTERMATIVES TO THE LAST MILE / [pt] CATV/GIGABIT ETHERNET/DWDM: NOVAS ALTERNATIVAS TÉCNICAS E ECONÔMICAS PARA A ÚLTIMA MILHA13 August 2002 (has links)
[pt] CATV / Gigabit Ethernet / DWDM : Novas Alternativas
Técnicas e Econômicas para a Última Milha tem como objetivo
descrever a ativação de novas funcionalidades de uma rede
de distribuição de CATV associada à distribuição de dados
em faixa larga. A utilização da tecnologia DWDM no domínio
óptico, associada a novas topologias de distribuição em
cabo coaxial e ao padrão Gigabit Ethernet, permite a
obtenção de uma nova concepção em rede de telecomunicações,
onde os serviços tradicionais de distribuição analógica são
inteiramente preservados. As vantagens desta solução
residem na obtenção de uma rede de muito alta velocidade,
ideal para aplicações Internet de segunda geração e em um
dramático aumento do retorno econômico nas redes CATV já
instaladas. / [en] CATV / Gigabit Ethernet / DWDM : New Technical and Economic
Altermatives to the Last Mile is aiming at describing the
activation of a new family of functionalities applicable to
a CATV distribution network together with a delivery of
broadband data. Optical domain DWDM technology is used,
associated with new coaxial cable distribution topologies
and the Gigabit Ethernet standard, allowing for a new
telecommunications network concept, where the traditional
analogical distribution services are totally preserved. The
above proposed solution presents two advantages. The first
is such that a very high-speed data network becomes
available. This last, is an ideal outfit for second
generation Internet. The second advantage is that the
obtained data network provides for economic revenues by far
greater than those of the traditional CATV networks.
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Convergence of millimeter-wave and photonic interconnect systems for very-high-throughput digital communication applicationsFan, Shu-Hao 14 November 2011 (has links)
In the past, radio-frequency signals were commonly used for low-speed wireless electronic systems, and optical signals were used for multi-gigabit wired communication systems. However, as the emergence of new millimeter-wave technology introduces multi-gigabit transmission over a wireless radio-frequency channel, the borderline between radio-frequency and optical systems becomes blurred. As a result, there come ample opportunities to design and develop next-generation broadband systems to combine the advantages of these two technologies to overcome inherent limitations of various broadband end-to-end interconnect systems in signal generation, recovery, synchronization, and so on. For the transmission distances of a few centimeters to thousands of kilometers, the convergence of radio-frequency electronics and optics to build radio-over-fiber systems ushers in a new era of research for the upcoming very-high-throughput broadband services.
Radio-over-fiber systems are believed to be the most promising solution to the backhaul transmission of the millimeter-wave wireless access networks, especially for the license-free, very-high-throughput 60-GHz band. Adopting radio-over-fiber systems in access or in-building networks can greatly extend the 60-GHz signal reach by using ultra-low loss optical fibers. However, such high frequency is difficult to generate in a straightforward way. In this dissertation, the novel techniques of homodyne and heterodyne optical-carrier suppressions for radio-over-fiber systems are investigated and various system architectures are designed to overcome these limitations of 60-GHz wireless access networks, bringing the popularization of multi-gigabit wireless networks to become closer to the reality.
In addition to the advantages for the access networks, extremely high spectral efficiency, which is the most important parameter for long-haul networks, can be achieved by radio-over-fiber signal generation. As a result, the transmission performance of spectrally efficient radio-over-fiber signaling, including orthogonal frequency division multiplexing and orthogonal wavelength division multiplexing, is broadly and deeply investigated. On the other hand, radio-over-fiber is also used for the frequency synchronization that can resolve the performance limitation of wireless interconnect systems. A novel wireless interconnects assisted by radio-over-fiber subsystems is proposed in this dissertation.
In conclusion, multiple advantageous facets of radio-over-fiber systems can be found in various levels of end-to-end interconnect systems. The rapid development of radio-over-fiber systems will quickly change the conventional appearance of modern communications.
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10Gb-s Bang-Bang Takt- und Datenrückgewinnung für optische NachrichtenstreckenDodel, Norman January 1900 (has links)
Zugl.: Berlin, Techn. Univ., Diss., 2007 / Hergestellt on demand
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Προσομοίωση και ανάλυση τεχνικών συγκέντρωσης κίνησης και πρόβλεψης κίνησης για βέλτιστη χρήση εύρους ζώνης σε παθητικά οπτικά δίκτυαΜαμουνάκης, Ιωάννης 30 April 2014 (has links)
Τα σύγχρονα παθητικά οπτικά δίκτυα (PONs) αποτελούν ίσως την πιο σημαντική επιλογή για την ανάπτυξη των μελλοντικών δικτύων ευρυζωνικής πρόσβασης στο παρόν και το μέλλον. Κύριοι λόγοι είναι το χαμηλό κόστος εφαρμογής τους, η απλή λειτουργία τους και υψηλά ποσοστά-ρυθμού μετάδοσης. Τα σύγχρονα Ethernet Passive Optical Networks (EPONs) και η εξέλιξή τους τα Gigabit PON (XGPON) έχουν τυποποιηθεί σε ταχύτητες της τάξεως των 10 Gb/s, ενώ τα επερχόμενα πρότυπα αναμένεται να αυξήσουν τη διαθέσιμη δυναμικότητα τους. Τα EPONs, ειδικότερα, καθιστούν δυνατή τη σύγκλιση των Ethernet δικτύων μεταξύ τους, η οποία βρίσκει ευρεία εφαρμογή σε τοπικά (local) και μέτρo (metro) δίκτυα περιοχής, και την υποδομή οπτικών ινών που εγκαθίσταται εντός του πεδίου εφαρμογής σε fiber-to-the-home (FTTH), την fiber-to-the-building (FTTB) και fiber-to-the-curb (FTTC) δίκτυα. Ακόμα όμως και για πρόσβαση μέχρι τους τελικούς χρήστες. Προτείνουμε ,μέσα από την παρούσα εργασία, μια νέα μέθοδο πρόβλεψης της κυκλοφορίας με σκοπό την ελαχιστοποίηση της καθυστέρησης πακέτων σε Ethernet Passive Optical Networks (EPON). Η μέθοδος βασίζεται στην παρακολούθηση της κυκλοφορίας στο Μονάδων Οπτικού Δικτύου (ONUs) και χρησιμοποιεί τις άμεσα διαθέσιμες πληροφορίες για την κυκλοφορία του δικτύου ώστε να προβλέψει τα δεδομένα που πρόκειται να συσσωρευτούν σε κάθε ONU στον επόμενο κύκλο. Έπειτα από σχετική έρευνα υλοποιήθηκε ο κατάλληλος αλγόριθμος και εξετάστηκε πειραματικά. Τα αποτελέσματα της προσομοίωσης δείχνουν ότι η βελτίωση της καθυστέρησης διάδοσης πακέτων (delay) μειώθηκε πάνω από 25% , χωρίς τροποποίηση του υπάρχοντος αλγορίθμου ανάθεσης εύρους ζώνης. Τέλος αποδείχθηκε η δικαιοσύνη (fairness) του αλγορίθμου στην παροχή πόρων του συστήματος ανάμεσα στις μονάδες ONU. / Modern passive optical networks (PONs) are perhaps the most important choice for the development of future broadband network in the present and the future . Main reason is the low cost of implementation, simple operation and high - transmission rate . Modern Ethernet Passive Optical Networks (EPONs) and the evolution of the Gigabit PON (XGPON) have standardized speeds of 10 Gb / s, while the upcoming standards expected to increase the available capacity . The EPONs, in particular , enable the convergence of Ethernet networks , which finds wide application in locally (local) and metro (metro) area networks , and fiber optic infrastructure installed within the scope of a fiber-to-the -home (FTTH), the fiber-to-the-building (FTTB) and fiber-to-the-curb (FTTC) networks . But even for access to the end users . We propose , through this work , a new prediction method of traffic in order to minimize the delay packets in Ethernet Passive Optical Networks (EPON). The method is based on monitoring the traffic on the Optical Network Units (ONUs) and uses readily available information about network traffic to provide the data to be accumulated at each ONU in the next cycle . After investigation, the appropriate algorithm was implemented and tested experimentally. Simulation results show that the improvement of packet propagation delay (delay) fell over 25 % , without modifying the existing bandwidth assignment algorithm . Finally turned justice (fairness) algorithm in providing system resources between units ONU.
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60 GHz CMOS pico-joule/bit OOK receiver design for multi-gigabit per second wireless communicationsJuntunen, Eric Andrew 03 June 2008 (has links)
Component design for a proposed 60 GHz short-range low-power high-data-rate On-Off Keying receiver in a 90 nm CMOS process is presented. The advances in RFCMOS and the commercial need for high data-rate wireless links are discussed as the enabling technology and motivation for research into the development of 60 GHz CMOS radios for wireless personal area networks.
System level calculations are presented validating the feasibility of the proposed receiver topology for its target application. The design and simulation results of a 60 GHz low noise amplifier, 60 GHz direct-conversion demodulator (which has generated an invention disclosure), and a baseband amplifier are discussed in detail. Also presented is a discussion of device modeling techniques for millimeter-wave designs. Measured results are presented for the demodulator. Finally, recommendations for future work are presented.
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Gigabit-Übertragung mit VielmodenfasernBunge, Christian-Alexander. Unknown Date (has links) (PDF)
Techn. Universiẗat, Diss., 2003--Berlin.
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A Meta Analysis of Gigabit Ethernet over Copper Solutions for Cluster-NetworkingHoefler, Torsten, Rehm, Wolfgang 28 June 2005 (has links) (PDF)
The IEEE Standard for Gigabit Networking was accepted in June 1998 and ratified as IEEE 802.3z. This standard uses considers an optical cable for signal transmission. One year later a new standard for Gigabit Ethernet over unshielded twisted pair of the 5th category was certified under the name 802.3ab. Nowadays, there are a couple of younger and older studies about Gigabit Ethernet technology and performance. This Meta Analysis is intended to put the main results altogether into one document suitable for a proper choice of gigabit networking equipment for cluster computers.
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