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International Workshop on telecommunications, IWT 2015

作者： Neto, Jahyr Goncalves Cardoso, Fabbryccio A. C. M. Ferreira, Paulo A. Valente Costa, Max H. M. University Center of Votuporanga Campinas SP Brazil Research and Development Center for Telecommunications - CPqD Campinas SP Brazil Department of Communications Department of Systems and Energy Campinas SP Brazil School of Electrical and Computer Engineering University of Campinas - Unicamp Campinas SP Brazil

ISBN: (纸本)9781467376228

Long Term Evolution (LTE) is the standard developed by the 3rd Generation Partnership Project (3GPP) to address the ITU's 4G requirements. For the first time, we have technology convergence in a generation of cellular communication systems. LTE promises data transmission of about 100 Mbps and its advanced version (LTE-A) goes even further with more than 1 Gbps in the downlink channel. Such very high data rates will only be achievable with appropriate network resource optimizations. Accordingly, this paper presents a flexible and adaptive scheme of multi-user scheduling considering data traffic prioritization in the LTE downlink channel. The proposed scheduling algorithm uses Proportional Fairness and Analytic Hierarchy Process (AHP) that allows to aggregate performance criteria and to improve resource allocation for users based on the general traffic. © 2015 IEEE.

关键词： Scheduling algorithms

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Abstracts from the 8th International Conference on cGMP Generators, Effectors and Therapeutic Implications : Bamberg, Germany. 23-25 June, 2017

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BMC pharmacology & toxicology 2017年第SUPPL 1期18卷 64-64页

作者： Todd Milne, G. Sandner, Peter Lincoln, Kathleen A. Harrison, Paul C. Chen, Hongxing Wang, Hong Clifford, Holly Qian, Hu Sheng Wong, Diane Sarko, Chris Fryer, Ryan Richman, Jeremy Reinhart, Glenn A. Boustany, Carine M. Pullen, Steven S. Andresen, Henriette Moltzau, Lise Román Cataliotti, Alessandro Levy, Finn Olav Lukowski, Robert Frankenreiter, Sandra Friebe, Andreas Calamaras, Timothy Baumgartner, Robert McLaughlin, Angela Aronovitz, Mark Baur, Wendy Wang, Guang-Rong Kapur, Navin Karas, Richard Blanton, Robert Hell, Stefan Waldman, Scott A. Lin, Jieru E. Colon-Gonzalez, Francheska Kim, Gilbert W. Blomain, Erik S. Merlino, Dante Snook, Adam Erdmann, Jeanette Wobst, Jana Kessler, Thorsten Schunkert, Heribert Walter, Ulrich Pagel, Oliver Walter, Elena Gambaryan, Stepan Smolenski, Albert Jurk, Kerstin Zahedi, Rene Klinger, James R. Benza, Raymond L. Corris, Paul A. Langleben, David Naeije, Robert Simonneau, Gérald Meier, Christian Colorado, Pablo Chang, Mi Kyung Busse, Dennis Hoeper, Marius M. Masferrer, Jaime L. Jacobson, Sarah Liu, Guang Sarno, Renee Bernier, Sylvie Zhang, Ping Flores-Costa, Roger Currie, Mark Hall, Katherine Möhrle, Dorit Reimann, Katrin Wolter, Steffen Wolters, Markus Mergia, Evanthia Eichert, Nicole Geisler, Hyun-Soon Ruth, Peter Feil, Robert Zimmermann, Ulrike Koesling, Doris Knipper, Marlies Rüttiger, Lukas Tanaka, Yasutake Okamoto, Atsuko Nojiri, Takashi Kumazoe, Motofumi Tokudome, Takeshi Miura, Koichi Hino, Jun Hosoda, Hiroshi Miyazato, Mikiya Kangawa, Kenji Kapil, Vikas Ahluwalia, Amrita Paolocci, Nazareno Eaton, Philip Campbell, James C. Henning, Philipp Franz, Eugen Sankaran, Banumathi Herberg, Friedrich W. Kim, Choel Wittwer, M. Luo, Q. Kaila, V. Dames, S. A. Tobin, Andrew Alam, Mahmood Rudyk, Olena Krasemann, Susanne Hartmann, Kristin Prysyazhna, Oleksandra Zhang, Min Zhao, Lan Weiss, Astrid Schermuly, Ralph Moyes, Amie J. Chu, Sandy M. Baliga, Reshma S. Hobbs, Adrian J. Michalakis, Stylianos Mühlfriedel, Regine Schön, Christian Fischer, Dominik M. Wilhelm, Barbara Zobor, Ditta Kohl, Ironwood Pharmaceuticals Cambridge USA Bayer AG Drug Discovery - Cardiovascular Research Wuppertal Germany Department of Cardiometabolic Diseases Research Boehringer Ingelheim Pharmaceuticals Ridgefield USA Department of Small Molecule Drug Research Boehringer Ingelheim Pharmaceuticals Ridgefield USA Department of Pharmacology University of Oslo and Oslo University Hospital Oslo Norway Institute of Experimental Medical Research University of Oslo and Oslo University Hospital Oslo Norway Center for Heart Failure Research University of Oslo and Oslo University Hospital Oslo Norway Department of Pharmacology Toxicology and Clinical Pharmacy Institute of Pharmacy University of Tuebingen Tuebingen Germany Physiologisches Institut Universität Würzburg Würzburg Germany Molecular Cardiology Research Institute Tufts Medical Center Boston USA Present Affiliation: Division of Cardiology University of Pittsburgh Medical Center Pittsburgh USA Present Affiliation: Department of Medicine Brown University School of Medicine Providence USA Division of Cardiology Tufts Medical Center Boston USA Max Planck Institute for Biophysical Chemistry Göttingen and German Cancer Research Center (DKFZ) Heidelberg Germany Department of Pharmacology and Experimental Therapeutics Thomas Jefferson University Philadelphia USA Institut für Kardiogenetik and Universitäres Herzzentrum Lübeck Universität zu Lübeck Lübeck Germany & DZHK e.V. (German Center for Cardiovascular Research) Partner Site Hamburg/Kiel/Lübeck Lübeck Germany Deutsches Herzzentrum München Klinik für Herz- und Kreislauferkrankungen Technische Universität München Munich Germany Center for Thrombosis & Hemostasis Universitätsklinikum der Johannes Gutenberg-Universität Mainz Mainz Germany Leibniz-Institut für Analytische Wissenschaften – ISAS – e.V Dortmund Germany Sechenov Institute of Evolutionary Physiology and Biochemistry Russian Academy of Sciences St. Petersburg Russia UCD Conway Institute UCD School of Medicine

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A Fiber Optic Powered Sensor Designed for Partial Discharges Monitoring on High Voltage Bushings

A Fiber Optic Powered Sensor Designed for Partial Discharges...

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SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference

作者： Joao B. Rosolem Elias K. Tomiyama Danilo C. Dini Fabio R. Bassan Rivael S. Penze Ariovaldo A. Leonardi Claudio Floridia Joao Paulo V. Fracarolli Romulo M. Teixeira CPqD - Research and Development Center in Telecommunications Cemig GT

ISBN: (纸本)9781467394932

In this work, we present the results of a fiber optic powered sensor for monitoring partial discharges on high voltage transformer bushings. The main advantages of the proposed system are high bandwidth, passivity, flexibility, non-intrusive, human and equipment risk free, easy installation and inherently galvanic isolation. The complete system is composed by the sensor that is one active hermetically sealed circular antenna installed near to the bushing flange, a fiber network and a control unit. The sensor is powered only by the optical power provided by one optic fiber connected to a remote optical source. At the same time, the partial discharge signals are transmitted by another optical fiber to the control unit installed in the substation room. We describe the design and the performance evaluation of the fiber optic powered antenna in laboratory.

关键词： Transformers Bushings Partial Discharges Antennas Optical fibers Power over Fiber PoF

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Design and Test of an ActiveFeedCircuit for Antenna Arrays with Reconfigurable Pattern

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Journal of Microwaves, Optoelectronics and Electromagnetic Applications 2015年 14卷 SI88-SI102页

作者： Ferreira, Daniel B. Bianchi, Ildefonso De Paula, Cristiano B. Microwaves and Optoelectronics Department - IEEM Technological Institute of Aeronautics São José dos CamposSP Brazil CPqD Research and Development Center in Telecommunications Wireless Systems Division - GSF Campinas - SP Brazil

In this paper, the design of an active feed circuit for antenna arrays with reconfigurable radiation pattern is presented. The adopted circuit topology is composed of phase shifters and variable gain amplifiers which enable the dynamic control of the amplitudes and phases of the array current excitations. The set of equations needed to configure the circuit components is derived and the measured patterns of an array fed by the proposed circuit are also shown in the paper, as well as the details for the fabrication of the circuit prototype. The excellent agreement between the theoretical and measured patterns validates both the design procedure and solutions adopted throughout the work. © 2015 SBMO/SBMag.

关键词： Timing circuits

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development and performance analysis of a photonic-assisted RF amplifier

Development and performance analysis of a photonic-assisted ...

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SBMO/IEEE MTT-S International Conference on Microwave and Optoelectronics (IMOC)

作者： N. Cañas-Estrada Arismar Cerqueira S. D. F. Noque R. M. Borges Neil Guerrero Gonzalez J. C. R. F. Oliveira National Institute of Telecommunications Santa Rita do Sapucai MG Brazil Instituto Nacional de Telecomunicacoes Santa Rita do Sapucai MG BR Research and Development Center of Telecommunications CPqD Campinas SP Brazil BrPhotonics Campinas SP Brazil

This work contributes to the area of microwave photonics applied to telecommunication systems in two ways. Initially, a photonic-assisted RF amplifier is proposed and experimentally validated. It takes advantage of the Four-wave Mixing (FWM) optical nonlinear effect, ensured by launching two high optical power carriers into a highly nonlinear fiber. The RF gain is defined as the difference between the electrical power photodetected using a FWM product and that from the conventional RoF system at the same optical power level. Experimental results demonstrate 24 dB gain after photodetection of the first FWM product. Furthermore, a performance analysis based on numerical simulations is reported in order to propose a high capacity intensity modulated radio over fiber architecture for future broadband access optical-wireless networks. Bit-error-rate curves of a 10 Gbit/s NRZ signal in different conditions of optical signal to noise ratio (OSNR) are presented for illustrating the applicability of the proposed photonics-based RF device.

关键词： Optical amplifiers Optical pumping Optical fibers Fiber nonlinear optics Optical polarization

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Challenges and current state of implementation of an IP platform for Brazil's ATM communications

Challenges and current state of implementation of an IP plat...

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Integrated Communications, Navigation and Surveillance Conference, ICNS

作者： Nadia A. Nassif Luciano Martins Fernando C.C. Silva P. dos S. Manoel Rodolfo S. Costa Marcos de C. Pacitti Marcos A. V. Belchior CPqD-Research and Development Center in Telecommunications Campinas SP Brazil DECEA - Department of Air Space Control Rio de Janeiro RJ Brazil DECEA-Department of Air Space Control Rio De Janeiro RJ Brazil

This paper presents challenges and current implementation state of an IP platform to support ATM communications (Radio, Telephony, Surveillance Data, etc.) in the SISCEAB (Brazilian Integrated Airspace Control System) taking into account the national plan for CNS/ATM development. This IP platform comprises Voice Communication System (VCS), Ground Radio Stations (GRS) and Surveillance Systems (RADAR) based on IP Standards and Protocols as well as an IP/MPLS backbone to interconnect them. The paper describes the current scenario of Brazilian Aeronautical Telecommunication Network (ATN) as well as future scenarios and challenges to support the safe and gradual migration to a new infrastructure based on IP technology following EUROCAE (European Organisation for Civil Aviation Equipment) Standards and ICAO Recommendations. It also presents the basic infrastructure of the Information and Communications Systems Qualification Laboratory for SISCEAB (LQCEA) built at cpqd (a Brazilian Telecom research center) which will be used to test and validate the IP platform performance and equipment interoperability before they are deployed operationally. In addition, it presents an overview of the systemic tests executed to analyze and validate this new platform which have contributed to the project progress. Finally, this paper gives an overview about the next steps of ATN communications implementation in Brazil.

关键词： IP networks Wide area networks Planning Multiprotocol label switching Finite impulse response filters Air traffic control

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Hierarchical taylor-made scheduling for data traffic with prioritization over LTE networks

Hierarchical taylor-made scheduling for data traffic with pr...

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International Workshop on telecommunications (IWT)

作者： Jahyr Gonçalves Neto Fabbryccio A. C. M. Cardoso Paulo A. Valente Ferreira Max H. M. Costa University Centec of Votuporanga Campinas SP Brazil Department of Communications Department of Systems and Energy Campinas SP Brazil School of Electrical and Computer Engineering Research and Development Center for Telecommunications - CPqD Campinas SP Brazil Campinas SP Brazil

关键词： Resource management Long Term Evolution Throughput Analytic hierarchy process Downlink Optimization Scheduling algorithms

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Alternative Routing and Zone-Based Spectrum Assignment Algorithm for Flexgrid Optical Networks

Alternative Routing and Zone-Based Spectrum Assignment Algor...

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IEEE International Conference on Communications

作者： Rafael A. Scaraficci Nelson L. S. da Fonseca CPqD-Telecommunications Research and Development Center Institute of Computing University of Campinas

In optical flexgrid networks, the optical spectrum can be allocated at a much finer granularity than it can be in fixed-grid WDM networks and variable spectrum widths can be assigned to the lightpaths according to the transmission rates, leading to more efficient spectrum usage. However, the dynamic establishment and tear down of lightpaths yields to the fragmentation of the spectrum with increase in blocking of connections, mainly connections demanding large spectrum widths. This paper proposes a novel algorithm that introduces a zone-based assignment policy together with an alternative path routing mechanism based on the maximum capacity available. Results derived via simulation using different topologies and considering connections requests from 40Gbps to 1000Gbps, show that the proposed algorithm leads to blocking ratio consistently lower than those given by traditional approaches. It also reduces the blocking ratio of high rates connections, in some cases, by a factor of six.

关键词： Optical fiber networks Routing Integrated optics Topology Heuristic algorithms Network topology

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Integrated management of 10G-PON network element using NETCONF and OpenFlow

Integrated management of 10G-PON network element using NETCO...

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International Conference on Network and Service Management

作者： André Berti Sassi Manuel Santos Gavidia Eder Leão Fernandes Marcelo Ribeiro Nascimento Converged Networks Corporate Department CPqD Research and Development Center in Telecommunications Campinas Brazil

This paper describes an integrated management architecture and solution for controlling network elements composed of controller, optional aggregation switch and a variable number of optical line terminals (OLTs), including multiple OLTs based on different technologies and presenting distinct features. The YANG language was used to model configuration and state data manipulated by the Network Configuration Protocol (NETCONF). The system allows the configuration of OpenFlow switches, providing greater protocol flexibility and forwarding algorithms to the aggregation network. The architecture has been implemented and tested using a real Gigabit-capable Passive Optical Network (GPON), a stacked GPON and switch equipment in a variety of scenarios.

关键词： Passive optical networks Switches Optical network units Data models Ports (Computers) Software

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Massive MIMO and waveform design for 5th generation wireless communication systems

Massive MIMO and waveform design for 5th generation wireless...

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International Conference on 5G for Ubiquitous Connectivity (5GU)

作者： Arman Farhang Nicola Marchetti Fabrício Figueiredo João Paulo Miranda University of Dublin Trinity College Dublin IE CTVR - The Telecommunications Research Centre Trinity College Ireland CPqD - Research and Development Center on Telecommunication Brazil

This article reviews existing related work and identifies the main challenges in the key 5G area at the intersection of waveform design and large-scale multiple antenna systems, also known as Massive MIMO. The property of self-equalization is introduced for Filter Bank Multicarrier (FBMC)-based Massive MIMO, which can reduce the number of subcarriers required by the system. It is also shown that the blind channel tracking property of FBMC can be used to address pilot contamination - one of the main limiting factors of Massive MIMO systems. Our findings shed light into and motivate for an entirely new research line towards a better understanding of waveform design with emphasis on FBMC-based Massive MIMO networks.

关键词： MIMO Antennas Transceivers Data mining Throughput Complexity theory

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