Um servi?o de descoberta ciente de contexto para internet das coisas

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Bibliographic Details
Main Author: Gomes, Porf?rio Dantas
Other Authors: 56765614400
Language:Portuguese
Published: PROGRAMA DE P?S-GRADUA??O EM SISTEMAS E COMPUTA??O 2017
Subjects:
QoC
Online Access:https://repositorio.ufrn.br/jspui/handle/123456789/21653
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Summary:Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-01-12T13:24:40Z No. of bitstreams: 1 PorfirioDantasGomes_DISSERT.pdf: 7295529 bytes, checksum: e59eed8fb988f2607cf908db21416196 (MD5) === Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-01-16T15:14:08Z (GMT) No. of bitstreams: 1 PorfirioDantasGomes_DISSERT.pdf: 7295529 bytes, checksum: e59eed8fb988f2607cf908db21416196 (MD5) === Made available in DSpace on 2017-01-16T15:14:08Z (GMT). No. of bitstreams: 1 PorfirioDantasGomes_DISSERT.pdf: 7295529 bytes, checksum: e59eed8fb988f2607cf908db21416196 (MD5) Previous issue date: 2016-04-04 === A Internet das Coisas (do ingl?s Internet of Things - IoT) ? um paradigma emergente caracterizado por uma mir?ade de dispositivos heterog?neos conectados ? Internet. Por?m, a alta heterogeneidade e a larga distribui??o dos dispositivos dispon?veis em IoT dificultam a implanta??o desse paradigma, fazendo com que m?quinas e usu?rios enfrentem desafios para encontrar, selecionar, e usar recursos de forma r?pida, confi?vel, e amig?vel. Nesse contexto, servi?os de descoberta desempenham um papel chave, permitindo que clientes (e.g., plataformas de middleware, usu?rios finais, e aplica??es) recuperem recursos atrav?s da especifica??o de crit?rios de busca contendo uma s?rie de atributos, tais como o tipo do recurso, capacidades, localiza??o, par?metros de qualidade de contexto (Quality of Context - QoC), etc. Esta disserta??o introduz o QoDisco, um servi?o de descoberta distribu?do que permite buscas por m?ltiplos atributos, buscas em intervalos, e opera??es de busca s?ncrona e ass?ncrona. Al?m disso, o QoDisco inclui um modelo baseado em ontologias para a descri??o sem?ntica de recursos (i.e., sensores e atuadores), servi?os, e dados capturados por sensores. Esta disserta??o apresenta, em detalhes, (i) a arquitetura do QoDisco, (ii) seu modelo de informa??o, (iii) a implementa??o de um prot?tipo, (iv) e a integra??o do QoDisco com uma plataforma de middleware para IoT, a EcoDiF. Por fim, este trabalho apresenta uma prova de conceito em um cen?rio de polui??o urbana e uma avalia??o qualitativa do desempenho do procedimento de busca do QoDisco. === The Internet of Things (IoT) is an emergent paradigm characterized by a plethora of heterogeneous devices connected to the Internet. However, the high heterogeneity and the wide distribution of the available devices in IoT make difficult the adoption of this paradigm, with users facing challenges to find, select, and use resources in a fast, reliable, and user-friendly way. In this context, discovery services perform a key role, allowing clients (e.g., middleware platforms, end-users, and applications) to retrieve resources through the specification of search criteria containing attributes, such as the resource type, capabilities, location, quality of context (QoC) parameters, and etc. This dissertation introduces the QoDisco, a distributed discovery service to search resources by multiple attributes, range queries, and synchronous and asynchronous operations. Furthermore, QoDisco includes an ontology-based model for semantic description of resources (i.e., sensors and actuators), services, and data captured by sensors. This dissertation presents, in details, (i) the QoDisco architecture, (ii) its information model, (iii) a propotype implementation, (iv) and the integration of QoDisco with a middleware platform for IoT, EcoDiF. Lastly, this work presents a proof of concept in an urban pollution scenario and a qualitative avaliation of the QoDisco?s search procedure performance.