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IEEE First Summer School on Smart Cities (S3C)

作者： Rosangela de Fátima Pereira Marquesone Tereza Cristina Melo de Brito Carvalho Lucas Batista Guimarães Eduardo Mario Dias Laboratory of Computer Networks and Architecture - LARC Polytechnic School University of São Paulo São Paulo Brazil Department of Energy Engineering and Automation Polytechnic School University of São Paulo São Paulo Brazil

Smart mobility is an emerging concept characterized by the use of disruptive technologies, such as cloud computing, Big Data and artificial intelligence. In this paper we propose a FIWARE-based component focus on improving the data analysis process, from data generated in services and applications existing in the smart mobility context. Our proposal aims to provide features that allows the development of solutions from the industry 4.0 concept and smart cities. Firstly, we briefly contextualize these terms, then we describe the characteristics and architectural design of our FIWARE component, highlighting how it can improve the support to smart services and applications. We also present real application scenarios where this component can be applied, specially considering the Brazilian cities.

关键词： Data analysis Big Data Internet Companies Smart cities

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Preface: Human-centred AmI: Cognitive approaches, reasoning and learning

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Journal of Ambient Intelligence and Smart Environments 2017年第5期9卷 537页

作者： Juan Carlos Augusto Carles Gomez Andrea Prati Hamid Aghajan Department of Computer Science and Research Group on Development of Intelligent Environments Middlesex University UK Wireless Networks Group Department of Network Engineering Universitat Politecnica de Catalunya Spain Department of Engineering and Architecture University of Parma Italy imec IPI Department of Telecommunications and Information Processing Gent University Belgium

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Off-body LOS and NLOS channel characterization in a mine environment

Off-body LOS and NLOS channel characterization in a mine env...

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International Conference on Electrical and Information Technologies (ICEIT)

作者： Moulay El Azhari Mourad Nedil Yassine Salih Alj Ismail Ben Mabrouk Khalida Ghanem Larbi Talbi Underground Communications Research Laboratory UQAT Val d'Or Canada Al Akhawayn University in Ifrane (AUI) Ifrane Morocco Sensor Networks and Cellular Systems (SNCS) Research Center University of Tabuk Tabuk Saudi Arabia Division Architecture des Systèmes Centre de développement des technologies avancées Algiers Algeria Department of Computer Science and Engineering University of Quebec in Outaouais (UQO) Canada

ISBN: (纸本)9781479974801

In this paper, the off-body performance of a single-input single-output (SISO) system was evaluated in Non-Line-of-Sight (NLOS) situations and compared with measurements done with a clear Line of Sight (LOS) link. The obstructed link study takes into account the human shadowing effect, usually caused by close by miners interrupting the transmitter-receiver link. Measurement campaigns were performed using Monopole antennas in an underground gold mine. The off-body channels were characterized in terms of the channel impulse response, RMS delay spread, and coherence bandwidth. The channel capacity was determined using the well-known Shannon formula for LOS and NLOS situations. The variation of the channel parameters in the different measurement scenarios was analyzed.

关键词： Delays Bandwidth Coherence Antenna measurements Loss measurement Channel capacity Shadow mapping

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Dynamic, context-specific SON management driven by operator objectives

Dynamic, context-specific SON management driven by operator ...

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IEEE Symposium on Network Operations and Management

作者： Christoph Frenzel Simon Lohmüller Lars Christoph Schmelz Network Operations and Architecture Nokia Solutions and Networks Research Munich Germany Department of Computer Science University of Augsburg Germany

The management and operation of a Self-Organizing Network (SON)-enabled mobile network still requires considerable human effort. On the one hand, SON Functions need to be configured through low-level parameters in order to control the optimization of the network. On the other hand, an operator wants to steer the system with solely technical objectives, and the underlying network should be adapted accordingly. This opens up a gap in network management that is currently closed manually. This paper presents an approach that overcomes the manual gap between technical objectives and SON Functions by choosing the best values for the SON Functions' configurations automatically. Main advantage of this approach is that it allows to manage a system at a high level of abstraction and, at the same time, reduces manual effort. The approach is explained by applying it in a case study in the field of mobile networks with four SON Functions, namely Mobility Load Balancing (MLB), Coverage and Capacity Optimization (CCO), Energy Savings Management (ESM) and Mobility Robustness Optimization (MRO).

关键词： Context Context modeling Unified modeling language Handover Minimization Mobile computing

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Novel Differentiated Service Methodology Based on Constrained Allocation of Resources for Transparent WDM Backbone networks

Novel Differentiated Service Methodology Based on Constraine...

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Brazilian Symposium on computer networks and Distributed Systems (SBRC)

作者： Joana Sócrates-Dantas Regina Melo Silveira Davide Careglio José Roberto Amazonas Josep Solé-Pareta Wilson Vicente Ruggiero Laboratory of Computer Networks and Architecture (LARC) Laboratory of Communications and Signal (LCS) Escola Politécnica da Universidade de São Paulo (EPUSP) São Paulo Brazil Department of Computer Architecture (DAC) Technical University of Catalonia (UPC) Barcelona Spain

Current Internet traffic comprises diverse service requirements. Service providers differentiate connections characteristics according to demand's requirements and pricing policy. In this paper we propose a differentiated service methodology that implements constrained resources allocation according to demand's priority level for WDM networks. With our proposed mechanism higher priority connections are guaranteed a larger amount of resources, still, lower priority demands are guaranteed a minimum level of service.

关键词： Bandwidth WDM networks Multiprotocol label switching Resource management Proposals Computational modeling

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A business model for video transmission services using dynamic adaptation streaming over HTTP 9

A business model for video transmission services using dynam...

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9th Advanced International Conference on Telecommunications, AICT 2013

作者： Rodríguez, Demóstenes Zegarra Rosa, Renata Lopes Bressan, Graça Laboratory of Computer Architecture and Networks Computer and Digital System Engineering Department University of São Paulo São Paulo Brazil

ISBN: (纸本)9781612082790

A business model for video transmission services is proposed that uses the Dynamic Adaptation Streaming over HTTP (DASH) mechanism using different versions of the same video. These video versions are encoded using different parameters, such as spatial resolution or number of frames per second. The transmission of each video version depends on the capabilities of the network at the end user point. The business model proposed considers different costs for each version of video fragments transmitted. The costs of video resolution upgrade are predefined by the service provider and used during the video streaming. Also, in this model, the user can either accept or reject an upgrade. Subjective tests were performed using different spatial resolutions of the same video, in which the interest level of users to perform a video upgrade is evaluated. Furthermore, the network architecture of the proposed solution is presented and the technical feasibility to deploy the proposed solution in commercial networks is shown. As a consequence, the proposed solution can improve the earnings of the video service provider. Copyright © 2013 IARIA.

关键词： Video streaming

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Decentralised approach for a reusable crowdsourcing platform utilising standard web servers

Decentralised approach for a reusable crowdsourcing platform...

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2013 ACM Conference on Ubiquitous Computing, UbiComp 2013

作者： Hara, Tenshi Springer, Thomas Bombach, Gerd Schill, Alexander Department of Computer Networks Institute of Systems Architecture Technische Universität Dresden 01062 Dresden Germany TUD Germany

ISBN: (纸本)9781450322157

Crowdsourcing has gained increasing interest during the last years as means for solving complex tasks with the help of a flexible group of contributors. The crowd can contribute with collecting data in the field, completing map information or votes for ideas or products. Even though the participation of large numbers of users with heterogeneous devices in crowdsourcing is a highly recurrent task, generic infrastructures for crowdsourcing can be hardly found. Especially the management of users, mobile devices and contributed data has to be repetitively implemented in new projects. To ease the development of crowdsourcing applications, in this paper we propose a generic platform for crowdsourcing supporting diverse crowdsourcing scenarios, the ability to handle large numbers of users and the involvement of heterogeneous mobile devices. The evaluation is based on scalability and performance experiments in order to demonstrate the feasibility of our approach. Copyright © 2013 ACM.

关键词： Location based services

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Experimental study and modelling of Networked Virtual Environment server traffic

Experimental study and modelling of Networked Virtual Enviro...

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International Wireless Communications and Mobile Computing Conference, IWCMC

作者： Juan Luis Font Christian Callegari José Luis Sevillano-Ramos Department of Computer Technology and Architecture University of Seville Spain TLC NETworks research GRouP University of Pisa Italy

ISBN: (纸本)9781467324793

The paradigm of virtual world environment arises as an useful tool in diverse fields such as e-Health or education, where they provide a new way of communication and interaction with end users. Networking capabilities play an important role in these systems, which motivates the study and understanding of the gaming network traffic. The present work focuses on Open Wonderland, a system that provides the basis for the development of Networked Virtual Environments with educational or health purposes. The goal of this paper is defining a testing environment and modelling the behaviour of the outgoing network traffic at the server side.

关键词： Servers OWL Testing Correlation Measurement Java Games

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Automated Federation of Distributed Resources into User-Controlled Cloud Environments

Automated Federation of Distributed Resources into User-Cont...

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IEEE International Conference on Utility and Cloud Computing (UCC)

作者： Marc Mosch Hartmut Schweizer Stephan Gross Alexander Schill Department of Computer Science Institute of Systems Architecture Chair of Computer Networks Technische Universität Dresden Dresden Germany

Virtualization and broadband Internet connections enabled what is known today under the term cloud. Benefits like scalability and cost reduction by pay per use agreements are accompanied by potential harm to the users data. Since existing cloud solutions can be considered synonymous with unknown locations and potentially hostile environments security protection objectives can not be guaranteed. Motivated by cloud's potential we propose a way to get rid of this drawback. We present work in progress of an approach that enables users to benefit from cloud computing and retain data sovereignty by federating the users own resources. More precisely we present initial protocol design thoughts for this federation and an extension of the OCCI specification for the flexible description of own and foreign services.

关键词： Cloud computing Availability Protocols Encryption

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A multi-tenancy model based on resource capabilities and Ownership for infrastructure management

A multi-tenancy model based on resource capabilities and Own...

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IEEE International Conference on Cloud Computing Technology and Science (CloudCom)

作者： J. A. García-Espín J. Ferrer Riera S. Figuerola Ester López Distributed Applications and Networks Area I2CAT Foundation Catalonia Barcelona Spain Computer Architecture Department Technical University of Catalonia Catalonia Barcelona Spain

This paper presents a multi-tenancy model based on infrastructure resource capability virtualisation. The model, namely Resources, Ownership, Roles and Actors or RORA, approaches network and IT infrastructure virtualisation seamlessly, thus enabling complex provisioning workflows for Cloud services and network services attached.

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