Дисертації з теми "Zigbee (protocole)"
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1
Francomme, Jackson. "Propositions pour un protocole déterministe de contrôle d'accès et de routage avec économie d'énergie dans les réseaux ZigBee." Phd thesis, Université Toulouse le Mirail - Toulouse II, 2008. http://tel.archives-ouvertes.fr/tel-00324196.
Анотація:
Le développement des technologies de réseaux de capteurs incite les industries à envisager des alternatives réduisant les coûts et la complexité tout en améliorant la fiabilité. Parmi les solutions sans fil actuelles, la technologie LP-WPAN IEEE 802.15.4/ZigBee dispose des mécanismes et des garanties nécessaires pour une utilisation industrielle. Nous proposons des mécanismes de synchronisation entièrement déterministe permettant l'utilisation du standard IEEE 802.15.4 en mode balisé dans un réseau maillé, ainsi qu'une méthode de routage adaptative « AODV en » pour les messages transmis dans un réseau étendu. En premier lieu, nous analysons la technologie IEEE 802.15.4/ZigBee, plus particulièrement sa capacité à conserver son comportement déterministe et économe en énergie dans une architecture de réseau maillé. Cette étude met en évidence plusieurs insuffisances du standard. Notre contribution consiste à palier à ces manques par une synchronisation centralisée réactive aux changements de topologie, esquivant les collisions de balises et de GTS. Ces modifications seront apportées au niveau de la sous-couche MAC. En second lieu, aucun des protocoles de routage (couche 3 du modèle ISO) actuellement les plus utilisés, ne prennent en compte simultanément les critères indispensables au contexte des communications dans un environnement industriel à fortes contraintes sur la consommation et sur le temps. Nous proposons un mécanisme de routage réactif adaptatif recherchant les routes optimisant la durée de vie des noeuds du réseau contraints énergétiquement, et basé sur l'optimisation conjointe du délai et de la consommation. Pour cela, nous avons analysé et évalué la consommation de chacun des noeuds sans fil autonomes utilisant le standard. Nous avons ainsi proposé des informations de délai et de niveau de charge de la batterie de chacun des noeuds, prises en considération dans notre mécanisme de routage adaptatif. L'ensemble de nos propositions sont validées en utilisant diverses méthodes dont les réseaux de Petri temporisés, la simulation et le prototypage. Les résultats obtenus sont exposés à la suite de chacune de nos contributions.
2
Lourme, Olivier. "Détection d'intrusions réaliste dans les maisons connectées à l'aide d'indicateurs physiques volatiles." Electronic Thesis or Diss., Université de Lille (2022-....), 2023. http://www.theses.fr/2023ULILB024.
Анотація:
Au sein de l'Internet des Objets, le secteur de la maison connectée est en plein essor. Pour quelques dizaines d'euros, chacun peut s'équiper de solutions domotiques intelligentes commandables à distance. Ces écosystèmes sont cela dit vulnérables à des attaques variées en raison A) d'une conception essentiellement guidée par le coût, générant des objets contraints sans implémentation de sécurité viable possible, B) de l'utilisation par ces objets de protocoles de communication sans-fil hétérogènes, dispersant les efforts de sécurisation, et C) de la gestion de ces objets par des consommateurs non-experts, adeptes du « setup and forget ».Contrairement à l'informatique traditionnelle où les solutions de protection sont répandues, nous faisons le constat de l'absence de proposition commerciale équivalente dans la maison connectée. Dans cette thèse, nous nous interrogeons sur les conditions de l'adoption à grande échelle de solutions de sécurité de type Systèmes de Détection d'Intrusion (IDS), visant à protéger les objets contraints déjà déployés. Ainsi, une première contribution recense les caractéristiques des maisons connectées pour les croiser avec des taxonomies d'IDS, afin de proposer les critères qualitatifs d'une solution de sécurité domestique réaliste.Par la suite, afin de faciliter la conception d'IDS, une deuxième contribution met à disposition de la communauté scientifique un jeu de données Zigbee, participant à la fourniture d'outils couvrant les principaux protocoles de la maison connectée. Toutes les trames échangées par 10 objets pendant 10 jours ont été capturées par 4 sondes distribuées dans un domicile-test. Des attaques ont été introduites afin d'établir et comparer différentes stratégies de détection. Outre une redondance des données de couche MAC, le jeu de données tire son originalité de l'extraction par chaque sonde du RSSI (Received Signal Strength Indicator) de chaque trame. Cette grandeur de couche physique, accessible à peu de frais dans les technologies sans-fil, permet de participer à l'identification de nœuds fixes. Par la suite, on peut imaginer d'identifier robustement chaque objet par une empreinte de couche physique faite d'un tuple de RSSI, complexe à imiter par un attaquant.Enfin, dans une troisième contribution, nous exploitons le jeu de données pour proposer un IDS détectant les attaques d'usurpation d'identité, favorisées par le fait que des piles de protocoles n'intègrent que peu ou pas d'authentification sur leur couche MAC. Pour les détecter, la cohérence de l'identifiant de couche MAC et de l'empreinte précédente à base de RSSI peut être considérée mais ce n'est plus possible quand les environnements sont sans cesse redessinés par les habitants qui y évoluent, les RSSI devenant volatiles. En fournissant des séries temporelles de RSSI en entrée d'un algorithme d'apprentissage non supervisé, nous établissons pour chaque couple (objet, sonde) un modèle des séquences RSSI normales. Les déviations par rapport au modèle permettent de détecter une attaque. Les métriques de détection obtenues, très intéressantes en regard de la faible complexité de l'architecture initiale envisagée, ainsi que les évaluations de l'autonomie et du coût de la solution laissent entrevoir une diffusion de tels systèmes dans les maisons connectéesWithin the Internet of Things, the smart home sector is booming. For a few tens of euros, everyone can be equipped with smart-home automation solutions that can be controlled remotely. However, these ecosystems are vulnerable to various attacks due to A) an essentially cost-driven design, generating constrained devices with too few resources for viable security implementations, B) the use by these devices of multiple wireless communication protocols, dispersing security efforts, and C) the management of these devices by non-expert consumers, following a “setup and forget” policy.Unlike traditional IT where protection solutions are widespread, we note the absence of an equivalent commercial proposal in smart-home environments. In this thesis, we question the conditions for a large-scale adoption of security solutions such as Intrusion Detection Systems (IDS), aiming at protecting constrained devices already deployed. Thus, a first contribution identifies the characteristics of smart homes to cross them with IDS taxonomies, in order to propose the qualitative criteria of a realistic domestic security solution.Subsequently, in order to facilitate the design of IDS, a second contribution provides the scientific community with a Zigbee dataset, participating to the availability of tools covering the main protocols found in smart homes. All the frames exchanged by 10 devices during 10 days were captured by 4 probes distributed in a test house. Attacks have been introduced in order to establish and compare different detection strategies. In addition to MAC layer data redundancy, the dataset derives its originality from the extraction by each probe of the RSSI (Received Signal Strength Indicator) of each frame. This physical layer feature, accessible easily in most wireless technologies, allows to participate to the identification of fixed nodes. Later, one can imagine identifying each device more robustly by a physical layer fingerprint made of a tuple of several RSSIs, a complex combination to imitate by an attacker.Finally, in a third contribution, we exploit the dataset to propose several IDSs detecting spoofing attacks, favored by the fact that several protocol stacks integrate little or no authentication on their MAC layer. To detect them, the consistency of the MAC layer identifier and the previous RSSI-based fingerprint can be considered, but this is no longer possible when the environments are constantly redrawn by the evolving inhabitants, as the RSSI becomes volatile. By providing RSSI time series as input to an unsupervised learning algorithm, we establish for each (device, probe) pair a model of normal RSSI sequences. Deviations from this model help detect an attack. The obtained detection metrics, which are very interesting given the low complexity of the initial considered architecture, as well as the evaluations of the autonomy and cost of the solution, suggest the spread of such systems in smart homes
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Santos, Francisco Sérgio dos [UNESP]. "Aplicação do protocolo SNMP para o monitoramento on line de uma microgeração fotovoltaica." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/150972.
Анотація:
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Rede de computadores são elementos fundamentais no processo de comunicação. Esses componentes exigem o acompanhamento constante de suas tarefas e são administrados por sistemas de informações que coletam os dados diariamente, para orientar os analistas de suporte na correção das falhas na infraestrutura e a ferramenta utilizada na gestão de recursos de rede de computadores é o protocolo SNMP. As infraestruturas de geração de energia elétrica também são elementos complexos e necessitam de acompanhamento. São utilizados sistemas de informação que disponibilizam dados para os usuários e responsáveis técnicos para avaliarem o funcionamento e corrigir as possíveis falhas. As redes de computadores e os sistemas de geração distribuídas estão convergindo para o ambiente do usuário, e as ferramentas de gestão são importantes são mecanismos na gestão da produção e consumo de energia elétrica. Assim, este trabalho tem como objetivo desenvolver um sistema de monitoramento on line para sistema de microgeração fotovoltaica utilizando o protocolo de rede de computadores Single Network Management Protocol (SNMP) para realizar a interface de comunicação com as variáveis de medições elétricas e meteorológicas. O desenvolvimento do projeto compõe dois componentes: hardware e software. O software é composto de dois módulos um para ser utilizado na Web, aplicações Desktop para uso em computadores que suportem sistemas operacionais como o Windows, Linux ou Mac e em dispositivos móveis. As funcionalidades programadas são cadastros das informações para o funcionamento do sistema, relatórios e gráficos que disponibilizam as informações ordenadas em vários níveis, diariamente, semanalmente, anualmente. Nos componentes de hardware foram utilizados cinco microcontroladores Atmel AVR, (Arduino) todos ligados à sensores e programados para a leitura de geração e consumo de energia elétrica e variáveis ambientais, como velocidade do vento, radiância solar, temperatura e níveis de chuva no período, e controle do sistema de bombeamento com duas motos bombas. Todos os experimentos foram realizados na central de microgeração distribuída fotovoltaica (MGD-PV) do Sítio Modelo da fazenda Lageado e no Laboratório de Energias Renováveis do Departamento de Engenharia Rural, nas Faculdades de Ciências Agronômicas da UNESP, campus de Botucatu. O laboratório de Energias Renováveis é o Servidor do sistema e as distâncias são muito variáveis entre todos os microcontroladores, de 32 metros a 260 metros e para realizar o processo de coleta dos dados nos diversos pontos e suprir essa distância foi necessário a construção e configuração de uma infraestrutura de comunicação baseada nas tecnologias ZigBee, para conectar os cincos microcontroladores. Os dados são coletados em intervalos regulares de cinco minutos, às variáveis ambientais são acompanhadas vinte e quatro horas por dia e às variáveis de geração de energia elétrica entre sete da manhã e dezessete horas da tarde. Os dados foram coletados entre setembro de 2016 e fevereiro de 2017. Os componentes de hardware e de software apresentaram rendimentos satisfatórios no processamento das informações através da interface criada pelo protocolo SNMP na comunicação e nas transmissões dos dados gerados pelos sensores, na configuração e mapeamento os objetos para construção da MIB para serem utilizados nas medições elétricas e variáveis ambientais.
Computer networks are fundamental elements in the communication process. Such components demand constant supervision of their tasks and are managed by information systems, which daily collect data to guide support analysts when correcting glitches in the infrastructure. Protocol SNMP is the tool used for managing resources of the computer network. The infrastructures of electric energy generation are also complex elements and require monitoring. Information systems are utilized, which provide data to users and technical professionals, so they can evaluate functioning and correct possible errors. Computer networks and systems of distributed generation are converging towards the user’s environment, so, management tools are important mechanisms in the control of production and consumption of electric energy. Thus, this work aims at developing an online monitoring system for photovoltaic microgeneration using the Single Network Management Protocol (SNMP) to perform the communication interface with the variables of electrical and metereological measurements. The project development is composed of two elements: hardware and software. The software consists of two modules: one to be used on the Web, Desktop apps for use in computers that can carry operational systems such as Windows, Linux or Mac and one to be used in mobile devices. Programmed functionalities include information register for the functioning of the system; reports and graphs that show information ordained in several levels, daily, weekly and annually. As to hardware, we used five microcontrolers Atmel AVR, (Arduino) connected to sensors and programmed for reading the production and consumption of electric energy as well as environmental variables, such as wind speed, solar radiance, temperature and rain levels during the period and control of the pumping system with two motor pumps. All experiments were carried out at the Distributed Photovoltaic Microgeneration Central (MGD-PV) on a Model Farm and at the Renewable Energies Laboratory of the Agronomy College at UNESP, in Botucatu. The Renewable Energies Laboratory is the server of the system and the distances among all microcontrolers vary from 32 to 260 meters. Therefore, in order to collect data from several locations and neutralize such distance, we needed to build and configure a communication infrastructure based on ZigBee technologies to connect the five microcontrolers. Data are collected during five-minute intervals; environmental variables are followed twenty four hours a day and the variables of electric energy production between 7am and 5pm. Data were collected between September 2016 and February 2017. Hardware and software components showed satisfactory performance at processing information through the interface created by the SNMP protocol regarding communication and transmission of the data generated by sensors as well as on the configuration and mapping objects for the construction of the MIB to be used in electrical measurements and environmental variables.
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Shahidi, Hamed. "Security Challenges of Communication Protocols in IoT : Comparing security features of ZigBee and Z-Wave communication protocols in IoT devices." Thesis, Högskolan i Halmstad, Akademin för informationsteknologi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-40113.
Анотація:
This research studies the security challenges in IoT devices. At first, security challenges have been described and then specifically the security of communication protocols in the IoT has been addressed. Finally, among different communication protocols, ZigBee and Z-Wave protocols have been chosen for this study. The criterion for choosing these two protocols is the level of security they provide for IoT devices to protect them against unauthorized access and hacking. Security, frequency, power consumption and data rate are the characteristics that have been discussed in the review of these two protocols. In the end, a comparison of the various features of these two protocols clarified that the security of IoT devices in each of these protocols depends on the type of the IoT device, the required range and other requirements, however, in most cases the ZigBee protocol showed more security than Z-Wave.
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Siemeintcoski, Michael Eberle 1975, Orlando José 1958-2010 Tobias, and Universidade Regional de Blumenau Programa de Pós-Graduação em Engenharia Elétrica. "Estudo e implementação de tecnologia sem fio usando protocolo Zigbee /." reponame:Biblioteca Digital de Teses e Dissertações FURB, 2009. http://www.bc.furb.br/docs/DS/2009/350526_1_1.pdf.
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Plumari, Matias Alejandro. "Fritzbee Router multifunzionale con supporto del protocollo 802.15.4/Zigbee." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amslaurea.unibo.it/1235/.
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Araújo, Rômulo César Carvalho de. "Sistema telemétrico dinâmico sem fio aplicado aos veículos rodoferroviários em malhas metroferroviárias." Universidade Federal da Paraíba, 2009. http://tede.biblioteca.ufpb.br:8080/handle/tede/5364.
Анотація:
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Previous issue date: 2009-12-02Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
This paper presents the development of a dynamic telemetric system of rail transit vehicles in metropolitan rail meshes that uses the transmission of signals via radio, according to communication protocol international standard. It consists of microcontrollers and of a radio transceiver, which, when coupled to sensors, capture and transmit the data in question, acting as a wireless transducer. It is modular technology of low cost, low power, consumption security and it is also capable of monitoring several variables simultaneously. It is innovative with regard to the monitoring of vehicles operating in permanent ways, assessing real-time performance. This assessment is intended to assist in preventive and corrective operation and maintenance of rail vehicles in order to improve the quality of services provided. This system has as main objective to enable a constant evaluation of factors which influence in the performance of the trains, as actual speed and pressure on the stock air suspension, so as to allow intervention strategies, thus avoiding a partial or total degradation of the transport services to passengers. To perform real-time telemetry, a network of wireless sensors, using ZigBee technology was set up in the way of traffic. The network made the capture and transmission of data collected from a train to the base station where a program installed on a personal computer is instructed to receive and send the collected data through an Ethernet network to a central monitoring system. The base station system acts as a data server providing information to a monitoring system installed in the Operational Control Center (OCC) of the Brazilian Company of Urban Train - Recife (CBTU / METROREC). The monitoring system installed in OCC is responsible for managing the storage and display of data received. It will display data and graphics in real time allowing traffic controllers monitor the functioning of the train and detect possible problems. The system also stores the data in a database for further studies.
Este trabalho apresenta o desenvolvimento de um sistema telemétrico dinâmico de veículos em malhas metroferroviárias que utiliza a transmissão de sinais via radiofrequência, de acordo com protocolo de comunicação padrão internacional. Compõese de microcontroladores e um rádio transceptor, que, quando acoplados a sensores, captam e transmitem os dados em questão, funcionando como transdutores sem fio. Tratase de tecnologia modular de baixo custo, baixo consumo de energia, segura e capaz de monitorar diversas variáveis simultaneamente. É uma técnica inovadora no que se refere ao monitoramento de veículos que circulam em vias permanentes, avaliando em tempo real o seu desempenho. Essa avaliação pretende-se que auxilie nas ações preventivas e corretivas de operação e manutenção dos veículos rodoferroviários, a fim de melhorar a qualidade dos serviços prestados. Esse sistema tem como principal objetivo permitir uma constante avaliação de fatores que influenciam o desempenho dos trens, como velocidade real e pressão nas bolsas de ar da suspensão, de forma a possibilitar estratégias de intervenção, evitando assim uma degradação parcial ou total dos serviços de transporte prestados aos passageiros. Para realizar a telemetria em tempo real, montou-se na via de tráfego uma rede de sensores sem fio, com tecnologia ZigBee. Essa rede efetuou a captação e envio dos dados coletados em um trem até a estação base onde um programa instalado em um computador pessoal fica encarregado de receber e enviar os dados obtidos, por meio de uma rede ethernet, a um sistema central de supervisão. O sistema da estação base atua como um servidor de dados disponibilizando informações para um sistema de supervisão instalado no Centro de Controle de Operacional (CCO) da Companhia Brasileira de Trens Urbanos Metrô do Recife (CBTU/METROREC). O sistema de supervisão instalado no CCO é responsável por gerenciar o armazenamento e a visualização dos dados recebidos. Ele exibirá os dados e gráficos em tempo real permitindo aos controladores de tráfego analisar o funcionamento do trem e detectar possíveis problemas. O sistema também armazenará os dados em um banco de dados para a realização de estudos posteriores.
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Pallares, Joan. "Study of industrial environment using Zigbee protocol and modeling industrial noise." Thesis, Högskolan i Gävle, Avdelningen för elektronik, matematik och naturvetenskap, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-27025.
Анотація:
This thesis is focused on the industrial environment. This study aims to understand the difficulties wireless communications have when performing in these types of environment with a specific standard (and protocol) Zigbee. These difficulties are due mainly to the physical effects and interferences as well the electromagnetic waves from these wireless transmission signals can suffer. The background of this project is to analyze how industries can implement wireless sensor networks (using Zigbee standard) for their factories in order for them to be beneficial i.e. reliable or if it is possible. Industries normally tend to keep in the path of the old fashioned way i.e. wired systems which are more robust and can cope with the hard system requirements. Some study on these environment effects (interference as well) is performed. The results show how this (Zigbee) sensor network could be or should be implemented in order to have the best performance (disposition of devices, type of environment considering only industrial environments, etc.). Specifically, these results show that Zigbe wireless sensor networks are limited to some conditions in order to obtain the desired reliability. These conditions are that these networks must be performed in absorbing environments, LoS disposition of devices, not too long diatance between devices and not other networks in the same area using the same frequency band. The limitation of absorbing environments is because the dispersion effects in the (highly) reflective environments are critically damageful for the link. The limitation of the other devices operating in the same frequency band in a close area is due to the fact that Zigbee has no frequency diversity. Last but not least, the limitations to LoS and not too long maximum range (approximately 50 meters) are related since the range would be (much) lower than 50 meters if the communication was in NLoS disposition of devices. The noise in this environment is also studied and modeled. The results show that as the impulsive index (which is ameasure of the number of impulses that reach the receiver in a certain unit of time) takes larger values, the distribution approximates that of a Gaussian and as A takes lower values the reults show an impulsive characteristic. The Probability of error is computed for values of A less than 1, where the impulsive characterstic is shown, and as A takes larger values the error is greater.
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Majer, Tomáš. "Komunikace v ZigBee sítích." Master's thesis, Vysoké učení technické v Brně. Fakulta informačních technologií, 2010. http://www.nusl.cz/ntk/nusl-235559.
Анотація:
Now days, we are more often meet sensors and sensor networks, which are used mainly in industrial fields. In this master thesis my target is sensor network Zigbee and usage of it. Internal structure of communication frames of APS application layer is presented here in details as well, which is used for control of sensors inside of sensor network. Main purpose of this master thesis is to design and implement application gateway between Internet and sensor network ZigBee. I present possible solution of communication protocol for transport over the Internet and processing of it by ZigBee coordinator. Thesis is written in style suitable for practical solution and results of solution are presented on model situations, which include discussion about possible improvements.
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Liu, Luyan. "Wireless Communication in Smart Housing." Thesis, Linnéuniversitetet, Institutionen för fysik och elektroteknik (IFE), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-37631.
Анотація:
With the development of computer and information technology, information and network will be the inevitable trend of smart home which aims to offer a comfortable, efficient, and convenient home. In this thesis, the background, developments and limitations of smart home systems will be described. Wired and wireless technologies applied on the smart home network will be analyzed and a comparison of them will be made. Finally, the ZigBee technology is selected to design the wireless communication network. For the system design, the thesis describes an idea where cluster topology is chosen to design the smart home system and demonstrates the process of networking as well. Based on the Labview platform, a smart home system will be simulated to achieve the functions included in data acquisition, analysis, display and storage. More specially, I will focus on temperature monitoring and control of heating and cooling systems. Finally, an analysis of the advantages and disadvantages of the smart home system is given.
11
Cheng, Chih Wei. "Design and implementation of home automation control system based on Zigbee and transmission control protocol/internet protocol." Thesis, California State University, Long Beach, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10001582.
Анотація:
This project discusses the Home Automation System (HAS), which utilizes the technology of wireless sensor network (WSN). The control mechanism of these systems is based on ZigBee that works in collaboration with mobile and Internet systems. The input of these devices is quite different, which creates challenges for the creators of the system. Certain household devices are very easy to control while others have comparatively complex inputs. The system should be able to control both types of devices through a singular interface. This challenge is overcome by implementation of the wireless sensor nodes in a HAS. A highly important advantage of using ZigBee’s monitoring system is energy conservation, and reduction in power costs. Utilization of HAS leads to a decrease in consumption of water, electricity and other energy inputs, a reduction of the cost of utilities, and the improvement of security features. The paper demonstrates that Home Automation System has numerous applications beyond control of lighting, temperature and security cameras in a household. The technology opens up frontiers for numerous other applications in the area of home assistance and even in home health care.
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van, Leeuwen Daniel, and Leonel Taku Ayuk. "Security testing of the Zigbee communication protocol in consumer grade IoT devices." Thesis, Högskolan i Halmstad, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-40189.
Анотація:
With the ever increasing number of Internet of Things devices going out on the market for consumers that are Zigbee certified there is a need for security testing. This is to make sure that security standards are upheld and improved upon in order to make sure networks are protected from unauthorized users. Even though a lot of research and testing has been done on the Zigbee key exchange mechanism, called Zigbee commissioning, improvements have still not been enough with severe vulnerabilities in consumer grade devices still existing today. The devices tested in this study use EZ-mode commissioning in order to exchange the network key between a Zigbee coordinator and a Zigbee end device in order to encrypt later communication after being paired. By using a simple radio receiver and a packet capturing program such as Wireshark an eavesdropping attack was conducted in order to capture the network key. The experiment demonstrates that this is still a weak point as the network key was successfully captured using eavesdropping. The analysis of the results show that previous criticisms of Zigbee commissioning have still not fully been addressed and can be a potential weak point in networks that use Zigbee certified IoT products.
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Fazzanaro, Pablo Luis. "Avaliação dos protocolos ZigBee e IEEE 802.11ah através de simulação computacional para aplicação no agronegócio." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/74/74134/tde-12082016-112422/.
Анотація:
A presença da tecnologia da informação dentro do agronegócio tem avançado e contribuído para a obtenção de melhores resultados para a gestão e, consequentemente, para o proprietário rural. Uma área de pesquisa que tem avançado dentro do setor rural é o monitoramento e a coleta de dados dos animais, em tempo real, possibilitando ao proprietário rural gerenciar seu rebanho, sem a necessidade de se deslocar ao local monitorado ou ao ponto de coleta de dados. A utilização das redes de sensores sem fio para fins de monitoração ainda possui limitações, como por exemplo a limitação do alcance do sinal de transmissão entre os nós sensores. Atualmente as tecnologias de transmissão de dados sem fio em uma rede de sensores alcançam pequenas distâncias, limitando o processo de detecção e coleta dos dados às áreas de pastagem menores. Assim, esta pesquisa teve como objetivo avaliar, através de simulação computacional, dois tipos de protocolos de comunicação sem fio que têm potencial para serem utilizados no monitoramento de sistemas de produção animal em longas distâncias: o protocolo ZigBee e o IEEE 802.1ah. Para a realização das simulações foram utilizados os softwares OMNet++ 4.5 e uma ferramenta de extensão chamada Mixim. Para tanto, foram criados dois cenários (ambientes) para cada protocolo, onde foram definidos: a área de cobertura, em torno de 1.500 metros, topologia da rede sem fio do tipo estática, dois nós para comunicação (um coordenador e um receptor) e as características do cenário. Por meio dos resultados obtidos através de simulação computacional com aplicação das métricas: distância, latência e taxa de perda de pacotes de dados nas simulações, observou-se que o protocolo ZigBee obteve o melhor desempenho em relação à distância de cobertura do sinal e da confiabilidade dos dados transmitidos.The presence of information technology within the agribusiness has advanced and contributed to better results for the management and, consequently, to the landowner. One area of research that has advanced into the rural sector is the monitoring and collection of animal data in real time, allowing the landowner to manage his herd, without the need to move to the monitored site or the data collection point. However the technology of wireless sensor networks used for this purpose, has limitations and one of them is the signals range factor because, in order to make the data collection is necessary to install sensors and antennas in the pasture to reach the signals. Currently, wireless data transmission technologies in a network of sensors reach short distances, limiting the detection process and data collect to smaller pasture areas. This study aimed to find a long-distance transmission solution to reach areas of larger proportions pastures, and offer the landowner new monitoring resources. The methodology used to find such a solution was through simulations, using two transmission technologies: ZigBee and IEEE 802.11ah. To perform the simulations it was used the OMNet++ software, version 4.5 and an extension tool, called the Mixim. It was created two scenarios (environments) for each protocol, where has been defined: the coverage area of about 1,500 meters, network topology wireless static type, two nodes for communication (a coordinator and a receiver) and the characteristics of the environment. Through the results obtained by computer simulation with application of the metrics: distance, latency and data packets loss rate in the simulations, it was observed that the ZigBee protocol had the best performance in relation to the signal coverage distance and the transmitted data reliability.
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Perez, Solis Juan Carlos. "“SISTEMA AUTOMÁTICO DE ABASTECIMIENTO, TANDEO Y DETECCIÓN DE FUGAS EN UNA RED DE AGUA POTABLE A LARGA DISTANCIA MEDIANTE TECNOLOGÍA ZIGBEE”." Tesis de Licenciatura, Universidad Autonoma del Estado de México, 2019. http://hdl.handle.net/20.500.11799/104958.
Анотація:
Tesis de Ingeniería en ComputaciónEl abastecimiento de agua se ha convertido en un gran problema en los últimos años, no solo en las grandes urbes, sino también en las regiones rurales. El gasto excesivo de este recurso, la presencia de fugas, y la contaminación de ríos, lagos y mantos freáticos, ponen el riesgo el acceso al agua para todas las personas. Actualmente se encuentran en marcha diversos proyectos e investigaciones para mitigar los efectos adversos de este fenómeno. En este trabajo, se presenta la implementación de un sistema de llenado automático, tandeo (distribución de agua, alternativamente o por tandas (Real Academia Espanola, 2014) y detección de fugas para depósitos elevados de agua potable de la localidad de Palmillas, San Felipe del Progreso, en el Estado de México, ya que los dos depósitos con que dicha comunidad cuenta se localizan alejados de la bomba de abastecimiento con distancias de 1.55 km y 2.03 km, respectivamente. La lejanía de los depósitos complica la supervisión del llenado de estos por las personas encargadas, ya que es frecuente que se desborden cuando llegan a su máxima capacidad, ocasionando un mal uso de la bomba de abastecimiento, desperdiciando agua y energía eléctrica. Con la aplicación del sistema que se propone en este documento, potencialmente se podrían ahorrar costos en cuanto al personal que se le está pagando, así como ahorro de energía eléctrica y, sobre todo, evitar el desperdicio de agua potable. El sistema diseñado está basado en la plataforma Arduino y módulos comunicados mediante la tecnología ZigBee, de tal forma que permite realizar el llenado automático de los depósitos, además de detectar fugas mediante sensores ultrasónicos que detectan el nivel de agua en los depósitos. También permite control sobre el tandeo de agua mediante válvulas que se activan de manera automática con la ayuda de módulos ZigBee y motores engranados con capacidad de abrir válvulas de cuatro pulgadas. Finalmente se incorporan celdas fotovoltaicas en los elementos remotos del sistema, ya que en algunas zonas de esta comunidad aún no se cuenta con energía eléctrica. El funcionamiento del sistema propuesto se validó mediante el uso de un modelo funcional a escala, para evaluar su posible implementación física.
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Bengtsson, Niclas. "Development and Implementation of a Low Power Wireless Sensor Network." Thesis, Linköping University, Department of Electrical Engineering, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-10295.
Анотація:
The wish to measure different environmental parameters, in for example office buildings, is getting more and more important in today’s society. Since the sensors should be easily deployed they need to be battery powered and communicate wireless. Furthermore the radio range must be extended because of the limited range on the free frequencies. This is where wireless sensor networks come in and extend the range by relaying the data through other nodes in the network, thereby extending the total range of the network.
The purpose of this thesis work is to develop a protocol for such a wireless sensor network, capable of delivering and relaying sensor data through the nodes of the network.
The protocol has been implemented in hardware also designed in this thesis. Tests of the network have been performed and the results have shown that the network works very well and fulfills all of the requirements. Furthermore the power consumption is only 15% of the required value. This thesis has produced a very good platform to use as a base for further development of a commercial product.
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Nurubhashu, Mabusubhan Vali. "OPNET Based Design and Performance Evaluation of ZigBee Networks." Thesis, University of North Texas, 2017. https://digital.library.unt.edu/ark:/67531/metadc1062853/.
Анотація:
ZigBee is a substandard of IEEE 802.15 family that is specially designed to take care of factors such as power, data rate and area that primarily affect network performance. This has controlling and monitoring capability, which finds potential applications in different sectors. ZigBee allows the concept of hybrid networks and mobility. A comprehensive analysis of ZigBee networks was carried out by constructing and simulating the networks to evaluate the performance in terms of throughput, delay, network load, and packets dropped. This research is aimed at evaluating the effect of network topology on the system performance. A careful review of simulation platforms brought the conclusion of using OPNET Modeler which has the required frame work. Different network topologies of simple and hybrid were built and simulated. Throughout the simulations, the best-case scenarios were drawn to the conclusion by the graphical analysis of parameters of evaluation. Mobile networks were constructed and simulated to investigate the effect of mobility on communication.
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García, Castaño Javier. "Algorithms and Protocols Enhancing Mobility Support for Wireless Sensor Networks Based on Bluetooth and Zigbee." Doctoral thesis, Mälardalen University, Department of Computer Science and Electronics, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-154.
Анотація:
Mobile communication systems are experiencing a huge growth. While traditional communication paradigms deal with fixed networks, mobility raises a new set of questions, techniques, and solutions. This work focuses on wireless sensor networks (WSNs) where each node is a mobile device. The main objectives of this thesis have been to develop algorithms and protocols enabling WSNs with a special interest in overcoming mobility support limitations of standards such as Bluetooth and Zigbee. The contributions of this work may be divided in four major parts related to mobility support. The first part describes the implementation of local positioning services in Bluetooth since local positioning is not supported in Bluetooth v1.1. The obtained results are used in later implemented handover algorithms in terms of deciding when to perform the handover. Moreover local positioning information may be used in further developed routing protocols. The second part deals with handover as a solution to overcome the getting out of range problem. Algorithms for handover have been implemented enabling mobility in Bluetooth infrastructure networks. The principal achievement in this part is the significant reduction of handover latency since sensor cost and quality of service are directly affected by this parameter. The third part solves the routing problems originated with handovers. The main contribution of this part is the impact of the Bluetooth scatternet formation and routing protocols, for multi-hop data transmissions, in the system quality of service. The final part is a comparison between Bluetooth and Zigbee in terms of mobility support. The main outcome of this comparison resides on the conclusions, which can be used as a technology election guide.
The main scientific contribution relies on the implementation of a mobile WSN with Bluetooth v1.1 inside the scope of the ”Multi Monitoring Medical Chip (M3C) for Homecare Applications” European Union project (Sixth Framework Program (FP6) Reference: 508291) offering multi-hop routing support and improvements in handover latencies with aid of local positioning services.
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García, Castaño Javier. "Algorithms and protocols enhancing mobility support for wireless sensor networks based on Bluetooth and Zigbee /." Västerås : Mälardalen University, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:mdh:diva-154.
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Teixeira, Luis Marcelo. "Desenvolvimento de uma aplicação com o protocolo ZigBee aplicado em instrumentação de ensaio em vôo." Instituto Tecnológico de Aeronáutica, 2006. http://www.bd.bibl.ita.br/tde_busca/arquivo.php?codArquivo=352.
Анотація:
A proposta deste trabalho é o desenvolvimento da aplicação em Instrumentação de Ensaio em Vôo utilizando o protocolo ZigBee, no qual, inicialmente, são apresentados os conceitos básicos ligados à rede de computadores como o padrão Ethernet e protocolos de comunicação sem fio, tais como Wi-Fi, Bluetooth, Wi-Max e outros. Em seguida, são apresentadas as características do padrão IEEE 802.15.4 (ZigBee) tais como: topologia, camadas físicas e relações com o modelamento RM/OSI incluindo a comparação do ZigBee com outras tecnologias sem fio. Na etapa seguinte, são apresentadas as características do ambiente de Ensaio em Vôo, onde o protocolo ZigBee será implementado justificando a escolha de tal padrão para aplicação neste projeto. Finalmente, são apresentados os resultados quanto à aplicação do protocolo ZigBee em Instrumentação de Ensaio em Vôo, comprovando a capacidade técnica, eficiência e ganhos da utilização desse protocolo nesse tipo de aplicação.
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Estremote, Marcos Antonio [UNESP]. "Gerenciamento de memória através da utilização de tabelas de dispersão em um módulo híbrido com suporte ao protocolo CAN (Controller Area NetWork) e ao padrão 802.15.4 ZigBee." Universidade Estadual Paulista (UNESP), 2017. http://hdl.handle.net/11449/152095.
Анотація:
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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
A utilização de redes de comunicação sem fio deixou de ser uma ferramenta opcional para tornar-se uma necessidade no monitoramento de residências, automóveis, controles de processos automatizados e comunicação entre as pessoas. Tratando-se de redes de transdutores cabeadas, as redes CAN (Controller Area Network) são utilizadas em automóveis modernos, instrumentação médica, em veículos táticos, na automação de processos, no transporte metropolitano e em sistemas de controle de fábricas. A maioria das estruturas críticas de sistemas de controle fazem uso do CAN em algum ponto na rede, para conectar sensores que se encontram distantes e controlar atuadores de um sistema, ou para conectar vários controladores que utilizam uma interface em comum. O padrão sem fio, IEEE 802.15.4, comercialmente conhecido como “ZigBee”, foi projetado para operar em baixas taxas de dados, com segurança e facilidade de configurações de rede. Esta tese tem como objetivo desenvolver um sistema heterogêneo utilizando microcontroladores ATMEGA em que, o modelo do protocolo CAN e o padrão IEEE 802.15.4 estejam acoplados. Este módulo será capaz de gerenciar e monitorar sensores e atuadores utilizando CAN e, através do padrão sem fio 802.15.4, comunicar-se com os outros módulos da rede. O interfaceamento entre os pacotes da rede de controle de área (CAN) com a rede ZigBee é realizado através da implementação de tabelas de dispersão (Hash Tables) para o gerenciamento e otimização da memória utilizada. As análises realizadas de tempo de inserção, remoção e comunicação de dados, com o auxílio da técnica computacional de tabelas de dispersão para o armazenamento das informações, mostram que este procedimento favorece a comunicação entre os protocolos de redes industriais com os protocolos de redes sem fios. A economia de memória do microcontrolador com a utilização das tabelas de dispersão proposta nesta tese chegou a ser em média 750% superior do que as que não se utilizam das tabelas de dispersão.
The use of wireless communication networks is not an optional tool and become a requirement in automated systems, such as monitoring home, automobiles, automated process control and communication between people. In another aspect, wired networks, such as CAN networks, are used in modern automobiles, medical instrumentation, tactical vehicles, process automation, metropolitan transport and manufactory control systems. Many critical structures in control system use CAN network at some point, to connect sensors that are far away and to control system actuators, or to connect several controllers that use a common interface. The wireless IEEE standard 802.15.4, commercially known as “ZigBee”, is designed to operate at low data transfer rates, with security and facility of network configurations. This thesis aims to develop a heterogeneous system using ATMEGA microcontrollers in which the CAN protocol model and the IEEE standard 802.15.4 are coupled. This module is capable of managing and monitoring sensors and actuators using CAN and, through the IEEE standard 802.15.4, communicating with the other modules in network. The interface between the CAN network packets with the ZigBee network is performed through the implementation of Hash Tables to manage and optimize the memory used. The analysis of time of insertion, delete and data communication, with the aid of the computational technique of hash tables for the storage of information, show that this procedure favors the communication between the protocols of industrial networks with protocols of wireless networks . The memory economy of the microcontroller with the the hash tables proposed in this thesis was on average 750% higher than those without the hash tables.
21
Estremote, Marcos Antonio. "Gerenciamento de memória através da utilização de tabelas de dispersão em um módulo híbrido com suporte ao protocolo CAN (Controller Area NetWork) e ao padrão 802.15.4 ZigBee /." Ilha Solteira, 2017. http://hdl.handle.net/11449/152095.
Анотація:
Orientador: Nobuo OkiResumo: A utilização de redes de comunicação sem fio deixou de ser uma ferramenta opcional para tornar-se uma necessidade no monitoramento de residências, automóveis, controles de processos automatizados e comunicação entre as pessoas. Tratando-se de redes de transdutores cabeadas, as redes CAN (Controller Area Network) são utilizadas em automóveis modernos, instrumentação médica, em veículos táticos, na automação de processos, no transporte metropolitano e em sistemas de controle de fábricas. A maioria das estruturas críticas de sistemas de controle fazem uso do CAN em algum ponto na rede, para conectar sensores que se encontram distantes e controlar atuadores de um sistema, ou para conectar vários controladores que utilizam uma interface em comum. O padrão sem fio, IEEE 802.15.4, comercialmente conhecido como “ZigBee”, foi projetado para operar em baixas taxas de dados, com segurança e facilidade de configurações de rede. Esta tese tem como objetivo desenvolver um sistema heterogêneo utilizando microcontroladores ATMEGA em que, o modelo do protocolo CAN e o padrão IEEE 802.15.4 estejam acoplados. Este módulo será capaz de gerenciar e monitorar sensores e atuadores utilizando CAN e, através do padrão sem fio 802.15.4, comunicar-se com os outros módulos da rede. O interfaceamento entre os pacotes da rede de controle de área (CAN) com a rede ZigBee é realizado através da implementação de tabelas de dispersão (Hash Tables) para o gerenciamento e otimização da memória utilizada. As anál... (Resumo completo, clicar acesso eletrônico abaixo)
Doutor
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Oliveira, Thiago de Almeida [UNESP]. "Redes dinâmicas de sensores sem fio ZigBee para aplicações de monitoramento e controle." Universidade Estadual Paulista (UNESP), 2015. http://hdl.handle.net/11449/135996.
Анотація:
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000858611.pdf: 2679098 bytes, checksum: d0dfcc7824034a1a7eafcf61822f4473 (MD5)Nos últimos anos, a tecnologia de Rede de Sensores Sem Fio (RSSF) tem atraído crescente atenção dos meios acadêmicos e industrial devido a seu enorme potencial em diversos campos de aplicação. Atualmente, em grande parte dos estudos em RSSFs, a rede é assumida a abranger um grande número de dispositivos sensores estáticos dispersos sobre uma área de interesse, formando uma rede de comunicação com área de cobertura fixa. Como uma extensão de capacidade de RSSFs, a mobilidade de componentes e dinamismo da rede apresentam uma interessante nova cadeia de aplicações, definida neste trabalho como Rede Dinâmica de Sensores Sem Fio (RDSSF). O desafio inicial das RDSSFs é analisar se esta dinâmica imposta à rede será suportada, uma vez que o protocolo de rede usando deve atender os requisitos para estas novas aplicações, como formação de rede e auto-organização, gerenciamento de comunicação com frequentes entradas e saídas de dispositivos da rede, descoberta de rotas de transmissão de dados com a mobilidade dos nós, entre outras características. Visando superar estes obstáculos, protocolos específicos de comunicação sem fio têm sido desenvolvidos para atender aplicações com mobilidade de dispositivos em RSSFs. Entretanto, estes protocolos específicos limitam o desenvolvimento de RDSSFs por se tratar de soluções pontuais e proprietárias ao invés fr dr utilizar um protocolo padronizado para interoperabilidade. Neste contexto, este trabalho apresenta uma análise de viabilidade de utilização do protocolo ZigBee em aplicações de RDSSF. Um levantamento de características e requisitos de aplicação, bem como uma discussão das vantagens e limitações relativos à adoção do protocolo ZigBee em RDSSFs são apresentados. Uma metodologia de projeto e desenvolvimento de RDSSF ZigBee é proposta com a finalidade de auxiliar em novas aplicações desta tecnologia. Além disso uma validação experimental desta...
The wireless sensor network (WSN) technology has attracted increasing attention considering its potential in many application fields. In most studies on WSNs, the network is assumed to cover a large number of static devices over a fixed coverage area. As an extension of WSN capacibilities, the devices mobility and network dynamism provide a new chain of interesting applications defined as Wirelles Dynamic Sensor Network (WDSN). The initial challenge in WDSN is to investigate whether this dynamic imposed on the network will be supported, once the used network protocol must meet the requirements for WDSN applications such as network formation and self-organization, communication management with the input and output devices on the network, route discovery and data transmission with node mobility, among other characteristics. In order to overcome these issues, specific wireless protocols have been developed to meet applications with devices mobility in WSN. However, these specific protocols limit the development of WSN since they are isolated and proprietary solutions, instead of using a standardized protocol for interoperability. In this context, this work presents a feasibility analysis of ZigBee protocol for WDSN applications. A survey of application features and requirements, as well as a discussion of advantages and limitations, regarding adoption of the ZigBee protocol in WDSN are presented. A design and development methodology of ZigBee WDSN is proposed in order to assist in new applications of this technology. Furthermore, an experimental validation using ZigBee protocol devices proves the WDSN potential
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Oliveira, Thiago de Almeida. "Redes dinâmicas de sensores sem fio ZigBee para aplicações de monitoramento e controle /." Bauru, 2015. http://hdl.handle.net/11449/135996.
Анотація:
Orientador: Eduardo Paciência GodoyBanca: Everson Martins
Banca: Ivando Severino Diniz
Resumo: Nos últimos anos, a tecnologia de Rede de Sensores Sem Fio (RSSF) tem atraído crescente atenção dos meios acadêmicos e industrial devido a seu enorme potencial em diversos campos de aplicação. Atualmente, em grande parte dos estudos em RSSFs, a rede é assumida a abranger um grande número de dispositivos sensores estáticos dispersos sobre uma área de interesse, formando uma rede de comunicação com área de cobertura fixa. Como uma extensão de capacidade de RSSFs, a mobilidade de componentes e dinamismo da rede apresentam uma interessante nova cadeia de aplicações, definida neste trabalho como Rede Dinâmica de Sensores Sem Fio (RDSSF). O desafio inicial das RDSSFs é analisar se esta dinâmica imposta à rede será suportada, uma vez que o protocolo de rede usando deve atender os requisitos para estas novas aplicações, como formação de rede e auto-organização, gerenciamento de comunicação com frequentes entradas e saídas de dispositivos da rede, descoberta de rotas de transmissão de dados com a mobilidade dos nós, entre outras características. Visando superar estes obstáculos, protocolos específicos de comunicação sem fio têm sido desenvolvidos para atender aplicações com mobilidade de dispositivos em RSSFs. Entretanto, estes protocolos específicos limitam o desenvolvimento de RDSSFs por se tratar de soluções pontuais e proprietárias ao invés fr dr utilizar um protocolo padronizado para interoperabilidade. Neste contexto, este trabalho apresenta uma análise de viabilidade de utilização do protocolo ZigBee em aplicações de RDSSF. Um levantamento de características e requisitos de aplicação, bem como uma discussão das vantagens e limitações relativos à adoção do protocolo ZigBee em RDSSFs são apresentados. Uma metodologia de projeto e desenvolvimento de RDSSF ZigBee é proposta com a finalidade de auxiliar em novas aplicações desta tecnologia. Além disso uma validação experimental desta...
Abstract: The wireless sensor network (WSN) technology has attracted increasing attention considering its potential in many application fields. In most studies on WSNs, the network is assumed to cover a large number of static devices over a fixed coverage area. As an extension of WSN capacibilities, the devices mobility and network dynamism provide a new chain of interesting applications defined as Wirelles Dynamic Sensor Network (WDSN). The initial challenge in WDSN is to investigate whether this dynamic imposed on the network will be supported, once the used network protocol must meet the requirements for WDSN applications such as network formation and self-organization, communication management with the input and output devices on the network, route discovery and data transmission with node mobility, among other characteristics. In order to overcome these issues, specific wireless protocols have been developed to meet applications with devices mobility in WSN. However, these specific protocols limit the development of WSN since they are isolated and proprietary solutions, instead of using a standardized protocol for interoperability. In this context, this work presents a feasibility analysis of ZigBee protocol for WDSN applications. A survey of application features and requirements, as well as a discussion of advantages and limitations, regarding adoption of the ZigBee protocol in WDSN are presented. A design and development methodology of ZigBee WDSN is proposed in order to assist in new applications of this technology. Furthermore, an experimental validation using ZigBee protocol devices proves the WDSN potential
Mestre
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Xinwei, Cai. "Towards achieving higher throughput with microchip based small footprint wireless vibration sensors using Zigbee and IEE802.15.4 protocol." Click HERE to connect, 2008. http://digital.library.okstate.edu/etd/XINWEI_okstate_0664M_10012.pdf.
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Tonyali, Samet. "Privacy-Preserving Protocols for IEEE 802.11s-based Smart Grid Advanced Metering Infrastructure Networks." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3693.
Анотація:
The ongoing Smart Grid (SG) initiative proposes several modifications to the existing power grid in order to better manage power demands, reduce CO2 emissions and ensure reliability through several new applications. One part of the SG initiative that is currently being implemented is the Advanced Metering Infrastructure (AMI) which provides two-way communication between the utility company and the consumers' smart meters (SMs).
The AMI can be built by using a wireless mesh network which enables multi-hop communication of SMs. The AMI network enables collection of fine-grained power consumption data at frequent intervals. Such a fine-grained level poses several privacy concerns for the consumers. Eavesdroppers can capture data packets and analyze them by means of load monitoring techniques to make inferences about household activities. To prevent this, in this dissertation, we proposed several privacy-preserving protocols for the IEEE 802.11s-based AMI network, which are based on data obfuscation, fully homomorphic encryption and secure multiparty computation. Simulation results have shown that the performance of the protocols degrades as the network grows. To overcome this problem, we presented a scalable simulation framework for the evaluation of IEEE 802.11s-based AMI applications. We proposed several modifications and parameter adjustments for the network protocols being used. In addition, we integrated the Constrained Application Protocol (CoAP) into the protocol stack and proposed five novel retransmission timeout calculation functions for the CoAP in order to increase its reliability.
Upon work showing that there are inconsistencies between the simulator and a testbed, we built an IEEE 802.11s- and ZigBee-based AMI testbed and measured the performance of the proposed protocols under various conditions. The testbed is accessible to the educator and researchers for the experimentation.
Finally, we addressed the problem of updating SMs remotely to keep the AMI network up-to-date. To this end, we developed two secure and reliable multicast-over-broadcast protocols by making use of ciphertext-policy attribute based signcryption and random linear network coding.
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Amador, Carlos Eduardo Vieira. "AP WiFi/ZigBee para suporte à localização baseada em redes sem fios." Master's thesis, Universidade de Aveiro, 2010. http://hdl.handle.net/10773/7354.
Анотація:
Mestrado em Engenharia Electrónica e TelecomunicaçõesThe evolution of the technology in the wireless telecommunications industry drives the development of new applications for many di erent areas. Wireless networks provide the systems versatility in terms of installation, positioning and mobility. The ZigBee protocol implemented over the IEEE 802.15.4 standard and liability arising as the ZigBee Alliance, it's a protocol-oriented wireless communication typically de ned by low consumption and low bandwidth. This protocol can be used in a variety of applications, so it also can be used as a tool to implement a tracking system. This project aims to extend an 802.11 AP so it can include in the same physical equipment, besides the usual features, a ZigBee interface, which can be used for wireless communication. In addition to communication between Wi-Fi and Ethernet normally provided by an AP, it should be possible to link between ZigBee and Ethernet, and optionally between ZigBee and WiFi. To make this possible will be necessary to acquire, develop and integrate various components of hardware (processing modules, communication interfaces and physical interfaces) and software (device drivers and protocol stacks for communication). Based on this platform you can develop a system for compartment oriented localization. This platform also allows the possibility of developing protocols for more speci c localization. In this project it was developed the tracking system in question, which from the signal power received in the access point may determine whether a tag is in the range of the access point. The collection of information is done by issuing the information received by each access point to a central server, which collects and treats the data and subsequently displays the results in a Web interface.
27
R?go, Samuel de Paiva. "Implementa??o da infra-estrutura e protocolo de comunica??o para tratamento e disponibiliza??o de dados do projeto ePoste." Universidade Federal do Rio Grande do Norte, 2014. http://repositorio.ufrn.br/handle/123456789/19936.
Анотація:
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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES
O projeto ?ePoste? ? um sistema de monitoramento por comunica??o sem fio que tempor objetivo sensorear e atuar em um ou v?rios pontos de ilumina??o p?blica. O presentetrabalho consistiu na elabora??o da estrutura e do protocolo de comunica??o do projetoePoste e tamb?m o tratamento de dados para detec??o de eventos nos sensores localizadosnos postes. Anteriormente a comunica??o com os sensores era local, e quandohavia a necessidade de coleta de dados ou atua??o nestes dispositivos, o operador tinhaque se deslocar at? o alcance da rede local. De posse disso, a proposta tem o interessede aumentar a dinamicidade do sistema, chegando a poss?veis integra??es com sistemasj? existentes para gest?o de ilumina??o. ? levado em considera??o a mesma tecnologiade comunica??o j? existentes entre os sensores, utilizando o protocolo ZigBee operandosobre rede mesh, onde a comunica??o com essa rede ? feita pela internet atrav?s de umgateway. O protocolo desenvolvido, trata da forma??o de quadro em n?vel mais baixo,onde se define in?cio, tamanho, e checagem de erros, utilizado na comunica??o entre osensor, concentrador e servidor; e tamb?m o protocolo de n?vel mais alto, tratando-se deum servi?o que utiliza atributos de nomes para atender requisi??es GET e POST sob oprotocolo HTTP, implementado no servidor de dados, estando dispon?vel para a comunica??ocom os sistemas clientes, no caso, sistemas de gerenciamento de ilumina??o.
The study consists in the structure elaboration and the ePoste project communicationprotocol, which is a system of monitoring by wireless communication with the aim tosensor and act with one or many public lighting points, and also the treatment of data todetect the activity in the sensors located on the posts. Previously the communication withsensors were made in locus and when data collect was necessary or the performance inthe devices, the operator had to move until the net place. Accordingly, the purpose has theconcern to increase the system dynamic, achieving the possible integrations with the systemsalready available to the lighting management. The same technology of communicationbetween the sensors are considerate, using the ZigBee protocol running on the meshnet, the communication with this net is made be internet through a gateway by GPRS,device with two basics functionalities, which bypass for data and the firmware update inthe sensor. This functionality test of data management is being tested; integrate way withlocal net of sensors and the internet data server operates. The protocol developed, besidesincorporating the ZigBee, that it is formation of framework in lower level, where definesbeginning, size and errors check, as well as the communication of sensor with the concentrator,which it is encapsulated in ZigBee; also the protocol of upper level, where thatit is the names, it was developed a platform of service to meet GET and POST requestsbeneath HTTP protocol, this service is implemented in the data server, which availablethe communication with the clients systems, in case, lighting management systems.
28
Hyrkäs, Nathalie, and Erik Karlsson. "Sårbarhetsanalys av IKEA TRÅDFRI rörelsesensor." Thesis, KTH, Hälsoinformatik och logistik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-296528.
Анотація:
Arbetet utvärderar Ikea TRÅDFRI rörelsesensors kommunikationsprotokoll utifrån ett säkerhetsperspektiv. Internet of Things expanderar och i takt med utvecklingen är det viktigt att granska produkter på marknaden för att se hur säkerhet är implementerat. I rapporten utforskas flera olika sätt att utvärdera produkten för att få en god helhetsbild. Detta innefattar metoder kring hur en obehörig kan få tillgång till information genom avlyssning, ifall en obehörig skulle kunna ta över kommunikationen genom att parkoppla till en ljuskälla på ett långt avstånd samt en bedömning av sårbarhetsgrad utifrån Totalförsvarets forskningsinstituts kartläggning. Resultatet påvisar möjligheten att utnyttja enheten genom en sidokanalsattack samt hur parkoppling kan ske på ett längre avstånd än vad som enligt specifikationen ska vara möjligt.This report evaluates the Ikea TRÅDFRI motion sensor communication protocol from a security point of view. Internet of Things is constantly expanding and with its growth it is important to examine products on the market to see how security is implemented. Different options on ways to evaluate the product is explored in the report. That includes methods of how an unauthorized person could gain access to information through eavesdropping, if they could take over the communication by pairing to a light source from a long distance, and an assessment of the degree of vulnerability by Totalförsvarets forskningsinstitut. The results show that it is possible to exploit the device through a side-channel attack and also how pairing is enabled on a longer distance than what is specified.
29
Marette, Alexandre J. "The Design, Building, and Testing of a Constant on Discreet Jammer for the Ieee 802.15.4/ZIGBEE Wireless Communication Protocol." DigitalCommons@CalPoly, 2018. https://digitalcommons.calpoly.edu/theses/1873.
Анотація:
As wireless protocols become easier to implement, more products come with wireless connectivity. This latest push for wireless connectivity has left a gap in the development of the security and the reliability of some protocols. These wireless protocols can be used in the growing field of IoT where wireless sensors are used to share information throughout a network. IoT is being implemented in homes, agriculture, manufactory, and in the medical field. Disrupting a wireless device from proper communication could potentially result in production loss, security issues, and bodily harm. The 802.15.4/ZigBee protocol is used in low power, low data rate, and low cost wireless applications such as medical devices and home automation devices. This protocol uses CSMA-CA (Carrier Sense Multiple Access w/ Collision Avoidance) which allows for multiple ZigBee devices to transmit simultaneousness and allows for wireless coexistence with the existing protocols at the same frequency band. The CSMA-CA MAC layer seems to introduce an unintentional gap in the reliability of the protocol. By creating a 16-tone signal with center frequencies located in the center of the multiple access channels, all channels will appear to be in use and the ZigBee device will be unable to transmit data. The jamming device will be created using the following hardware implementation. An FPGA connected to a high-speed Digital to Analog Converter will be used to create a digital signal synthesizer device that will create the 16-tone signal. The 16-tone signal will then be mixed up to the 2.4 GHz band, amplified, and radiated using a 2.4 GHz up-converter device. The transmitted jamming signal will cause the ZigBee MAC layer to wait indefinitely for the channel to clear. Since the channel will not clear, the MAC layer will not allow any transmission and the ZigBee devices will not communicate.
30
Maqueira, Valencia José Enrique. "Diseño de un sistema de control de acceso sobre protocolos Zigbee para las oficinas de un edificio educativo." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2013. http://tesis.pucp.edu.pe/repositorio/handle/123456789/4900.
Анотація:
Los sistemas de control de acceso se usan para permitir o denegar el ingreso de
ciertas personas a un área específica en un determinado horario. Estos sistemas se
usan ampliamente en hoteles, condominios y todo tipo de empresas, en los que
dependiendo del usuario, se le otorga acceso a más o menos áreas. Actualmente,
tienen diversas aplicaciones como control de asistencia, control de rondas y
exclusas de seguridad.
Los centros educativos también requieren cierto control del acceso a sus
instalaciones, tanto al campus, como a áreas específicas donde personal docente o
administrativo tienen acceso pero el alumnado no. Existen ciertas políticas de
seguridad que cada unidad debe cumplir para garantizar el correcto resguardo de
estas zonas. Un adecuado sistema de control de acceso puede facilitar la
implementación de estas políticas y su eficiencia, así como proveer de funciones
adicionales específicas para cada aplicación.
La propuesta a desarrollar plantea el uso de un sistema de control de acceso
inalámbrico de bajo consumo de energía, que pueda ser integrado con otros
sistemas para lograr una solución más completa mediante el intercambio de
información, como la grabación de las personas al ingreso. Este sistema deberá
tener un bajo costo y generará la posibilidad de llevar un registro de los ingresos y
salidas y de conocer en qué zona del área restringida se encuentra cada
ingresante.Tesis
31
Li, Weibo. "An Address-Based Routing Scheme for Static Applications of Wireless Sensor Networks." Thesis, University of Canterbury. Electrical and Computer Engineering, 2008. http://hdl.handle.net/10092/2110.
Анотація:
Wireless sensor networks (WSNs), being a relatively new technology, largely employ
protocols designed for other ad hoc networks, especially mobile ad hoc networks (MANETs).
However, on the basis of applications, there are many differences between WSNs and
other types of ad hoc network and so WSNs would benefit from protocols which take
into account their specific properties, especially in routing. Bhatti and Yue (2006) proposed
an addressing scheme for multi-hop networks. It provides a systematic address
structure for WSNs and allows network topology to avoid the fatal node failure problem
which could occur with the ZigBee tree structure. In this work, a new routing strategy
is developed based on Bhatti and Yue’s addressing scheme. The new approach is to implement
a hybrid flooding scheme that combines flooding with shortest-path methods
to yield a more practical routing protocol for static WSN applications. The primary
idea is to set a flooding counter K as an overhead parameter of control messages which
are used to discover routes between any arbitrary nodes. These route request messages
are flooded for K hops and then oriented by shortest-path routing from multiple nodes
in the edge of the flooding area to the destination. The simulation results show that this
protocol under certain wireless circumstances is more energy conscious and produces
less redundancy than reactive ZigBee routing protocol. Another advantage is that the
routing protocol can adapt any dynamic environment in various WSN applications to
achieve a satisfactory data delivery ratio in exchange for redundancy.
32
Amorim, Leonardo Gomes de Paiva. "Utiliza??o de sistemas dedicados a protocolos de rede aplicados ? efici?ncia energ?tica da ilumina??o p?blica." Universidade Federal do Rio Grande do Norte, 2011. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15374.
Анотація:
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Previous issue date: 2011-11-14Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior
The public illumination system of Natal/RN city presents some recurring problems in the aspect of monitoring, since currently is not possible to detect in real time the light bulbs which are on throughout the day, or those which are off or burned out, at night. These factors depreciate the efficiency of the services provided, as well as, the use of energetic resources, because there is energetic waste and, consequently, financial resources that could be applied at the own public system illumination. The purpose of the work is create a prototype in substitution to the currently photoelectric relays used at public illumination, that have the same function, as well others: turn on or off the light bulbs remotely (control flexibility by the use of specifics algorithms supervisory), checking the light bulbs status (on or off) and wireless communication with the system through the ZigBee? protocol. The development steps of this product and the tests carried out are related as a way to validate and justify its use at the public illumination
O sistema de ilumina??o p?blica da cidade do Natal/RN apresenta problemas recorrentes no aspecto do monitoramento, visto que atualmente n?o ? poss?vel detectar em tempo real as l?mpadas que est?o acesas durante o dia, ou as que est?o apagadas (queimadas) durante a noite. Estes fatores depreciam a efici?ncia dos servi?os prestados, bem como, do uso dos recursos energ?ticos, posto que h? desperd?cio de energia e, consequentemente, de recursos financeiros que poderiam ser aplicados no pr?prio sistema de ilumina??o p?blica. Este trabalho teve como objetivo a cria??o de um prot?tipo em substitui??o aos atuais rel?s fotoel?tricos utilizados na ilumina??o publica, os quais possuem as mesmas fun??es, como tamb?m agregam outras: ligar ou desligar a l?mpada remotamente (flexibiliza??o do controle a partir do uso de algoritmos supervis?rios espec?ficos), verifica??o do status da l?mpada (acesa ou apagada) e comunica??o sem fio com o sistema atrav?s do protocolo ZigBee?. Relata-se aqui as etapas de desenvolvimento deste produto e os testes realizados como forma de validar e justificar seu emprego na ilumina??o p?blica
33
Donatti, Renan Nantes. "Desenvolvimento de um sistema de monitoramento de animais, utilizando rede de sensores sem fio, baseado no protocolo ZigBee e tecnologia GPS." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/74/74134/tde-14062017-112910/.
Анотація:
A busca pelo aumento da produtividade e a difusão da agricultura de precisão trazem a necessidade cada vez maior de informações melhores e mais detalhadas, para isso o uso da tecnologia se torna mais comum e mais necessária. Uma das necessidades para um manuseio bovino com precisão é saber com detalhes o comportamento dos animais no campo, sendo um fator de análise a forma como eles se movimentam. Assim, este trabalho tem por objetivo o desenvolvimento de um sistema de comunicação sem fio para coleta de dados referentes ao posicionamento global dos animais (Latitude e Longitude), provenientes de animais em ambiente aberto. O sistema foi desenvolvido utilizando a tecnologia de comunicação sem fio, baseado no protocolo ZigBee e tecnologia GPS (Global Positioning System). Foram desenvolvidos dois sistemas para testes, sendo um deles composto de nó coordenador e nó móvel, e outro sistema composto de um celular fora de uso com um aplicativo desenvolvido para sistema operacional Android. Ambos os sistemas efetuaram leituras das posições e deslocamento dos animais, o primeiro em tempo real e o segundo tendo os seus dados armazenados para uma avaliação posterior. Os resultados atenderam aos objetivos e mostraram-se satisfatórios, desta forma, pode-se concluir que o sistema de comunicação sem fio, responsável pela coleta dos dados, tem-se mostrado eficiente e com confiabilidade na transmissão dos dados.The pursuit of increased productivity and the diffusion of precision agriculture brings the increasing need for better and more detailed information, for which the use of technology becomes more common and more necessary. One of the needs for accurate handling of cattle is to know in detail the behavior of the animals in the field, being a factor of analysis the way they move. Thus, the objective of this work is the development of a wireless communication system for collecting data from animals in an open environment. The system was developed using wireless communication technology, based on the ZigBee protocol and GPS (Global Positioning System) technology. Two systems were developed for testing, one being composed of coordinating node and mobile node and another system composed of a without use mobile phone with an application developed for Android. Both systems carried out readings of the positions and displacement of the animals, one being able to be evaluated in real time and another having their data stored for later evaluation. The results met the objectives and were satisfactory, so it can be concluded that the wireless communication system responsible for data collection has been shown to be efficient and reliable in data transmission.
34
Rovinelli, Mattia. "Sistema di localizzazione outdoor." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amslaurea.unibo.it/17123/.
Анотація:
L'obbiettivo iniziale era quello di poter fornire dei dati di localizzazione in casi estremi senza l'utilizzo delle classiche tecnologie che potrebbero non rispondere in casi estremi come:
- La ricerca di un percorso sulle piste da sci.
- Aiutare i pompieri nella ricerca di persone in un edificio in fiamme.
- La ricerca di persone momentaneamente disperse.
Nel nostro caso più specifico, abbiamo voluto trattare la ricerca di bambini scomparsi sulle spiagge italiane, più nello specifico, si propone un sistema che dia la possibilità di tracciare il percorso fatto dal fanciullo tramite una banca dati popolata di informazioni raccolta da un dispositivo. Si è riusciti ad avere una possibile soluzione soddisfacente attraverso l'uso di varie tecnologie. Partendo dalla costruzione della rete e dallo sviluppo di vari dispositivi per la ricerca dei dati attinente alla posizione, fino alla progettazione e modellazione di un database che dà la possibilità di salvare i dati di posizione.
35
Morais, Bruno Maia de. "InteliCare Infraestrutura de Telessaúde para apoio a serviços de atenção domiciliar baseada em redes de sensores sem fio e sistemas embarcados." Universidade Federal da Paraíba, 2012. http://tede.biblioteca.ufpb.br:8080/handle/tede/6099.
Анотація:
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Previous issue date: 2012-08-20Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES
This work presents a monitoring infrastructure for people in a situation of home care through the integration of wireless sensor networks and data processing in embedded systems, enabling a real-time monitoring of the clinical picture of each patient. To perform real-time telemetry, a sensor network with ZigBee technology was set and some biological signals were captured in order to validate the proposed infrastructure. This network performs the capture and transmission of data collected to base stations where a treatment system embedded in an FPGA is instructed to receive data, perform the necessary calculations and send the information obtained through an Ethernet network to a central installed in a monitoring central station. The use of a dedicated processing device such as an FPGA, provides a much greater efficiency than is typically found in general purpose processors and allows the customization of the hardware. Besides, reduces the final cost of the system. It also presented the integration of Arthron and InteliCare. Arthron is tool that works with flow distribution. This integration allows more real experiences of telemedical procedures so that you can have in a single transmission, audio, video, and biological signals. The monitoring system installed in the central station is responsible for storage and display the received data. It will display data in tables and graphs in real time and allow a team of experts make decisions and guide patients and / or their caregivers to perform a certain procedure.
Este trabalho apresenta uma infraestrutura de monitoramento para pessoas em situação de internação domiciliar através da integração de redes de sensores sem fio e processamento de dados em sistemas embarcados, possibilitando um acompanhamento em tempo de execução (online) do quadro clínico de cada paciente. Para realizar a telemetria online, uma rede de sensores com tecnologia ZigBee, foi montada e alguns sinais biológicos foram captados de forma a validar a infraestrutura proposta. Esta rede realiza a captação e envio dos dados coletados até estações base onde um sistema de tratamento embarcado em um FPGA fica encarregado de receber os dados, realizar os cálculos necessários e enviar as informações obtidas, através de uma rede Ethernet, a um sistema central de supervisão instalado em uma central de monitoramento. A utilização de um dispositivo de processamento dedicado, como um FPGA, proporciona ao sistema uma eficiência muito maior do que normalmente é encontrada em processadores de uso geral além de permitir a customização do hardware reduzindo o custo final do sistema. É apresentada também a integração da infraestrutura InteliCare com a ferramenta de distribuição de fluxos Arthron. Esta integração permite tornar mais real a experiência de colaboração em procedimentos médicos de forma que é possível ter numa mesma transmissão, áudio, vídeo e sinais biológicos. O sistema de supervisão instalado na central de monitoramento é responsável por gerenciar o armazenamento e a visualização dos dados recebidos. Ele exibe os dados em tabelas e gráficos em tempo de execução e permitirá que uma equipe de especialistas tome decisões e oriente os pacientes e/ou seus cuidadores para realizar determinado procedimento.
36
Ríos, Pacheco Roberto. "Diseño de un sistema centralizado inalámbrico para detección y alarma contra incendio utilizando tecnología Zigbee / Roberto Ríos Pacheco." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2009. http://tesis.pucp.edu.pe/repositorio/handle/123456789/252.
Анотація:
Los sistemas de alarma contra incendio se encuentran desarrollados para cumplir el
objetivo de detectar eventos de incendio en áreas estructurales de inmuebles que no
son monitoreados de forma constante por un personal de mantenimiento, seguridad o
por los inquilinos propios. Actualmente las tecnologías mas usadas están
determinadas por sistemas convencionales e inteligentes contra incendio
caracterizado por una transmisión de datos por cables de 2 o 4 hilos. A través del
siguiente trabajo se realizará un diseño de una red de alarma contra incendio
completamente inalámbrica entre la interconexión de los dispositivos de iniciación,
panel de control y dispositivos de anunciación pertenecientes a una red de área
personal configurado a través de un protocolo de comunicaciones (Zigbee) de bajo
consumo de energía. El objetivo principal es diseñar una red inteligente de detección
con capacidad de direccionar cada uno de los componentes para reconocer áreas del
inmueble de forma totalmente independiente a través de un entorno inalámbrico, de
igual manera la gestión y organización de los datos obtenidos en panel de control
basado en un microcontrolador anexado a un módulo coordinador.Tesis
37
Silversved, Nicklas, and Hampus Runesson. "A comparison of the security in ZigBee and the IEEE 802.15.9 standard and an experimental analysis of communication over IEEE 802.15.4." Thesis, Linköpings universitet, Institutionen för datavetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-157762.
Анотація:
The increasing number of IoT devices used in today’s society has led to a demand for better security in order to prevent attackers from gaining access to private information. The IoT brings a wide application scope and because of that there are a lot of ways to set up a secure network and manage keys in these kinds of networks. This paper presents a comparison between the security model in Zigbee and the new recommended practice for Key Management Protocols defined by the IEEE 802.15.9 standard. We investigate key establishment and transportation together with the vulnerabilities that this might bring regarding potential attacks like DoS and MitM. Since these protocols are built on the IEEE 802.15.4 standard, experimental tests have been made where we analyze the throughput, RTT and packet loss over varied distances and we try to determine the maximum transmission range for devices using IEEE 802.15.4 modules. The IEEE 802.15.9 standard works with different KMPs and depending on the KMP being used we can see both similarities and differences regarding key management and possible attacks when comparing it to ZigBee. Furthermore, we found that attacks on a ZigBee device is more likely to compromise the whole network while similar attacks would only affect the specific peers in an IEEE 802.15.9 communication. Based on the experiments we find that open areas, distance and interference have a negative effect on the throughput, RTT and packet loss of the communication.
38
Maldonado, Laurente Ángel. "Diseño de una red utilizando el protocolo de comunicación Zigbee para el sistema de recirculación de la planta acuícola PUCP / Ángel Maldonado Laurente." Bachelor's thesis, Pontificia Universidad Católica del Perú, 2008. http://tesis.pucp.edu.pe/repositorio/handle/123456789/268.
Анотація:
La hipótesis de la investigación es dado que el monitoreo de parámetros en la Planta Acuícola PUCP es realizado de manera manual y basado en las condiciones actuales, generando una mala gestión de la unidad productiva. Entonces el diseño de una red inalámbrica permitirá la recolección automática de información relevante de la unidad de cultivo, permitiendo al acuicultor realizar una administración adecuada optimizando el proceso de producción.Tesis
39
Al-Anbagi, Irfan. "Quality of Service for Wireless Sensor Networks in Smart Grid Applications." Thèse, Université d'Ottawa / University of Ottawa, 2013. http://hdl.handle.net/10393/26186.
Анотація:
Monitoring and controlling smart grid assets in a timely and reliable manner is highly
desired for emerging smart grid applications. Wireless Sensor Networks (WSNs) are
anticipated to be widely utilized in a broad range of smart grid applications due to
their numerous advantages along with their successful adoption in various critical areas
including military and health care. Despite these advantages, the use of WSNs in such
critical applications has brought forward a new challenge of ful lling the Quality of
Service (QoS) requirements of these applications. Providing QoS support is a challenging
issue due to highly resource constrained nature of sensor nodes, unreliable wireless links
and harsh operation environments. In this thesis we critically investigate the problem
of QoS provisioning in WSNs. We identify challenges, limitations and requirements for
applying QoS provisioning for WSNs in smart grid applications. We nd that the topic
of data prioritization techniques at the MAC layer to provide delay bounds in condition
monitoring applications is not well developed. We develop six novel QoS schemes that
provide data di erentiation and reduce the latency of high priority tra c in a smart
grid context. These schemes are namely; Delay-Responsive Cross layer (DRX), Fair
and Delay-aware Cross layer (FDRX), Delay-Responsive Cross layer with Linear backo
(LDRX), Adaptive Realistic and Stable Model (ARSM), Adaptive Inter-cluster head
Delay Control (AIDC) and QoS-aware GTS Allocation (QGA). Furthermore, we propose
a new Markov-based model for IEEE 802.15.4 MAC namely, Realistic and Stable Markovbased
(RSM). RSM considers actual network conditions and enhances the stability of
the WSNs. We show through analytical and simulation results that all of the presented
schemes reduce the end-to-end delay while maintaining good energy consumption and
data delivery values.
40
Campos, Carlo Frederico Pereira de Siqueira. "Estudo e especifica??o de um sistema de instrumenta??o para unidades de eleva??o de petr?leo utilizando tecnologia sem fio." Universidade Federal do Rio Grande do Norte, 2006. http://repositorio.ufrn.br:8080/jspui/handle/123456789/15512.
Анотація:
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Previous issue date: 2006-11-27Wireless sensor networks are reality nowadays. The growing necessity of connectivity between existing industrial plant equipments pushes the research and development of several technologies. The IEEE 802.15.4 LR-WPAN comes as a low-cost and powersaving viable solution, which are important concerns while making decisions on remote sensoring projects. This study intends to propose a wireless communication system which makes possible the monitoring of analogic and/or digital variables (i. e., the pressure studied) involved on the artificial methods for oil and gas lifting. The main issues are: To develop a software based on SMAC Standard in order to create a wireless network to monitoring analogic and/or digital variables; To evaluate the communication link based on the number of lost packets tested in different environments (indoor and outdoor) and To propose an instrumentation system consisting of wireless devices
As redes de sensores sem fio (RSSS) j? s?o uma realidade hoje em dia, pois a grande necessidade de conectividade entre os equipamentos existentes numa planta industrial impulsiona a pesquisa e o desenvolvimento de diversas tecnologias. O padr?o LR-WPAN IEE 802.15.4 apresenta-se como uma solu??o vi?vel, com baixo custo e baixo consumo de energia, requisitos importantes para a implanta??o de um sistema de sensoriamento remoto. A contribui??o deste trabalho consiste em propor um sistema de comunica??o sem fio, que possa monitorar vari?veis anal?gicas e/ou digitais (no caso do estudo em quest?o, a press?o) nos m?todos de eleva??o artificial de petr?leo e g?s natural. Os pontos principais deste estudo s?o: Desenvolver um software baseado no Padr?o SMAC com intuito de criar uma rede sem fio com fins de monitoramento de vari?veis anal?gicas e/ou digitais; Avaliar o enlace de comunica??o com rela??o a quantidade de pacotes perdidos em diferentes ambientes (ambientes internos (Indoor) e externos (Outdoor)) e, Propor um sistema de instrumenta??o utilizando tecnologia sem fio
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Cocomazzi, Roberto. "Una Rassegna delle Tecnologie e dei Protocolli Abilitanti l'Internet of Things." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2018.
Анотація:
La crescente presenza di dispositivi capaci di comunicare, con l'enorme sviluppo di Internet e delle tecnologie mobili ha permesso la concretizzazione dell'Internet of Things.
In questo sistema, dispositivi di ogni genere cooperano per creare sistemi autonomi capaci di realizzare operazioni specifiche negli ambiti per le quali sono stati progettati, dal monitoraggio della salute al controllo dei sistemi cittadini, con l'obiettivo finale
di migliorare la qualità della vita dell'uomo.
Questo lavoro di tesi si pone di descrivere le tecnologie e i protocolli che rendono possibile il funzionamento dell'IoT.
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Santos, Jerry Lee Alves dos. "Sistema Telemétrico para Monitoramento de Trens Através de Redes de Sensores sem Fio e Processamento em Sistema Embarcado." Universidade Federal da Paraíba, 2010. http://tede.biblioteca.ufpb.br:8080/handle/tede/6139.
Анотація:
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Previous issue date: 2010-03-05Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
The present study portrays the development of a telemetric system integrating wireless sensor networks and data processing into an embedded system for monitoring vehicles in metropolitan railway networks, enabling real-time monitoring of train movements. The main objective of this system is to allow constant evaluation of numerous factors which can influence train performance, such as speed and pressure in air bags. By so doing, it may become possible to generate information so as to facilitate intervention strategies, thereby preventing the partial or total degradation of the transport services provided to the population. In order to perform real-time telemetry, wireless sensor networks with ZigBee technology will be mounted alongside the entire route of the train traffic. These networks capture and transmit data collected in each train until they reach base stations where a processing embedded system in an FPGA is responsible for receiving the data, performing the necessary calculations and sending the obtained information to a central monitoring system through an Ethernet network. The embedded system functions as a data server providing information to a monitoring system installed in the Operational Control Center (OCC) and in other sectors requiring this information. The use of a dedicated processing device such as an FPGA gives the system far greater efficiency than that typically found in general purpose processors. Furthermore, it allows the customization of the hardware, thus reducing the final cost of the system. The monitoring system installed in the OCC is responsible for managing the storage and display of the data received. It will display the data in tables and graphs in real time, enabling the traffic controllers to analyze the operation of each train and also to detect possible problems. The system also stores the data in a database for further study. Keywords: Telemetry, Wireless Sensor Networks, ZigBee Protocol, Embedded Systems, Nios II processor, FPGA.
Este trabalho apresenta o desenvolvimento de um sistema telemétrico que integra redes de sensores sem fio e processamento de dados em sistema embarcado para monitoramento de veículos em redes de transportes metroferroviários, possibilitando um acompanhamento em tempo real do movimento dos trens. Este sistema tem como principal objetivo permitir uma constante avaliação de vários fatores que influenciam o desempenho dos trens, como velocidade e pressão nas bolsas de ar, de forma a gerar informações que possibilitem estratégias de operação e manutenção, evitando assim uma degradação parcial ou total dos serviços de transporte prestados à população. Para realizar a telemetria em tempo real, redes de sensores sem fio com tecnologia ZigBee são montadas em toda a via de tráfego. Estas redes realizam a captação e envio dos dados coletados em cada trem até estações base onde um sistema de tratamento embarcado em um FPGA fica encarregado de receber os dados, realizar os cálculos necessários e enviar as informações obtidas, através de uma rede ethernet, a um sistema central de supervisão. O sistema embarcado atua como um servidor de dados disponibilizando informações para um sistema de supervisão instalado no Centro de Controle de Operações (CCO) e em outros setores que necessitem destas informações. A utilização de um dispositivo de processamento dedicado, como uma FPGA, proporciona ao sistema uma eficiência muito maior do que normalmente é encontrada em processadores de uso geral, além de permitir a customização do hardware, reduzindo o custo final do sistema. O sistema de supervisão instalado no CCO é responsável por gerenciar o armazenamento e a visualização dos dados recebidos. Ele exibe os dados em tabelas e gráficos em tempo real permitindo aos controladores de tráfego analisar o funcionamento de cada trem e detectar possíveis problemas. O sistema também armazena os dados em um banco de dados para realização de estudos posteriores.
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Silva, Maur?cio Rabello. "An?lise de desempenho de rede de comunica??o para um sistema multi VANT aplicado ? varredura de ?rea de impacto de foguetes." PROGRAMA DE P?S-GRADUA??O EM ENGENHARIA EL?TRICA E DE COMPUTA??O, 2017. https://repositorio.ufrn.br/jspui/handle/123456789/24835.
Анотація:
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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)
Pesquisas relacionadas com sistemas utilizando diversos ve?culos a?reos n?o tripulados (multi VANTs) v?m crescendo nos ?ltimos anos. Entre os desafios enfrentados, uma rede de comunica??o de dados robusta ? crucial para coopera??o e colabora??o entre VANTs. No projeto da rede devem ser levados em conta fatores como o prop?sito da miss?o da esquadrilha, planejamento de caminho e trajet?ria, coleta de dados dos sensores e suprimento energ?tico. Dessa forma, o presente trabalho apresenta a especifica??o de uma arquitetura de rede de comunica??o de dados para uma esquadrilha de Ve?culos A?reos N?o Tripulados a serem utilizados na varredura da ?rea de impacto de foguetes lan?ados a partir do Centro de Lan?amento da Barreira do Inferno (CLBI ? Rio Grande do Norte). Assim, realiza-se um estudo sobre as principais caracter?sticas das redes de comunica??o para sistemas multi VANT e as especificidades da aplica??o abordada nesse projeto. S?o propostas duas estrat?gias diferentes para a varredura da ?rea de impacto de foguetes. S?o analisadas as caracter?sticas das redes para sistemas multi VANTs mais adequadas a essas estrat?gias, de forma a fazer uma an?lise comparativa entre as mesmas e definir uma arquitetura apropriada para a aplica??o. Dentro desse contexto, ? proposta uma arquitetura de rede, com base em m?dulos XBee Pro 900HP, integrados em uma plataforma de hardware controlada por computador embarcado, equipado com GPS e placa controladora de piloto autom?tico. ? idealizado e implementado um plano de testes com os dispositivos XBee para avaliar o desempenho destes na arquitetura de rede proposta em termos de robustez, confiabilidade e economia de energia. Para aferi??o do desempenho nos poss?veis cen?rios de forma??o da esquadrilha de VANTs s?o utilizados softwares de ger?ncia de rede, visando medir a largura de banda (throughput), perda de pacotes e outros indicadores de desempenho nos links de comunica??o entre os diferentes n?s da rede.
Research on Multi Unmanned Aerial Vehicle Systems (Multi-UAV) is growing in recent years. Among several scientific and technical challenges, a robust data communication network is crucial for the cooperation and collaboration between the UAVs. The network design must take into account factors such as the purpose of the mission, trajectory and path planning, sensor data collection and energy supply. In this way, the present work presents the specification of a data communication network architecture for a squadron of Unmanned Aerial Vehicles to be used in the scanning of the rocket impact area for CLBI rocket launch center (Rio grande do Norte, Brazil). Thus, a study on the main characteristics of communication networks for multi-UAV systems and the specificities of the application addressed in this project is done. Two different strategies for the scanning of the rocket impact area are proposed. In order to do a comparative analysis between these strategies and to define an appropriate architecture for the application, the characteristics of the networks for multi-UAV systems that are more appropriate to them are analyzed. In this context, a network architecture based on Xbee Pro 900HP S3B modules, integrated in an embedded computer hardware platform, equipped with GPS and autopilot controller board is proposed. A test plan with Xbee devices is conceived and implemented in order to evaluate their performance in the proposed network architecture in terms of robustness, reliability and energy consumption. In order to measure performance in the possible UAV squad formation scenarios, a network management software is used to measure throughput, packet loss and other performance indicators in the communication links between the different nodes of the network.
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Eriksson, Hannes, and Sollie Ivan Brange. "Wireless IO : A wireless accessory for integration of an Axis Communications camera in a sensor network." Thesis, Högskolan i Halmstad, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-34203.
Анотація:
When installing new network security cameras in buildings, the cameras are often connected to sensors via signal wires. Since most building already have internet and electricity drawn throughout the structure, the procedure of routing a new signal wire can be costly and time demanding. By replacing this wire with a wireless link, the cost and time it takes for the customer to install a camera could be reduced. The objective for this thesis is to investigate different wireless technologies used in short range, low power wireless communication networks such as PANs and LANs. Focusing on technologies used in the surveillance segment a decision will be made on which wireless technology that would suit as a link between a sensor and a camera for transmitting trigger signals. The technology will then be implemented in a proof-of-concept accessory, which can give an Axis Communications camera wireless functionality through it’s IO port.
45
Uhlíř, Luděk. "PDA software pro robotický fotbal." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-217455.
Анотація:
Robotic soccer is a game like a real soccer but here the game is played by robots. The rules are the same, only there are few exceptions (foul, penalty kick, stalemate situation). Game is running without the human intervention. Just a human referee is supervising the game. Two teams are attending the game. Each of them has a control computer. The control computer is the brain of the game. It has a camera, it is making decisions for the next step of robots and sending them configuration data. The thesis deals with testing of communication interface and designs the new communication protocol for the next generation of the robots. The testing is provided by pocket pc Palm TX. It will send data over the Bluetooth interface to the control pc and will configure particular constants, like constants of PID regulator and an address of a robot. This will be provided by the IrDA interface.
46
Soussi, Issam. "Conception d'une chaîne en bande de base reconfigurable pour le protocole de communication Zigbee." Thèse, 2015. http://depot-e.uqtr.ca/7794/1/031167676.pdf.
Анотація:
ZigBee est désormais la norme dominante pour les réseaux personnels sans fil et à faible vitesse à courte portée (LR -WP AN) et elle a de nombreuses applications dans le domaine de l'automatisation et l'automatisation industrielle. La couche physique de ce protocole de communication sans fil comporte une chaîne en bande de base figée. Ce projet présente un modèle VHDL synthétisable d'un émetteur/récepteur en bande de base numérique (couche physique) tel que décrit dans la norme IEEE 802.15.4. Il est implémenté dans un circuit programmable FPGA et il est validé à travers une panoplie des tests réels. L'émetteur/récepteur est capable de travailler avec : n'importe quel taux d'échantillonnage, différents taux de transmission, les deux bandes 915MHz ou 2.45 GHz, deux modulations possibles (QPSK et O-QPSK), et aussi nous pouvons jouer sur le nombre de bits de deux sorties pour l'adapter à la résolution du convertisseur numériqueanalogique. La transmission d'une trame PPDU est gérée par un contrôleur suivant les modes suivants : arrêt, boucle, émission et réception. L'émetteur/récepteur est contrôlé par une interface graphique développée sur un ordinateur.
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Cunha, André Ribeiro e. "On the use of IEEE 802.15.4/ZigBee as federating communication protocols for Wireless Sensor Networks." Master's thesis, 2007. http://hdl.handle.net/10216/10939.
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Cunha, André Ribeiro e. "On the use of IEEE 802.15.4/ZigBee as federating communication protocols for Wireless Sensor Networks." Dissertação, 2007. http://hdl.handle.net/10216/10939.
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Hsu, Chih-Shun, and 許智舜. "A WiFi and ZigBee Coexistence MAC Protocol for Exploiting ZigBee Transmission Opportunities." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/45114544856843275964.
Анотація:
碩士淡江大學
資訊工程學系碩士班
101
The network lifetime of Wireless Sensor Networks (WSNs) highly depends on the remaining energy of each sensor. However, the irregular location and frequency of the event detection leads to different remaining energy of each sensor when all the sensors execute their task for a long time. As a result, some sensor may exhaust its energy, resulting in coverage hole. Therefore, to fully cover the hole, each sensor should move to cover the hole for achieving the purpose of full coverage. Nevertheless, the sensor which has the least energy may exhaust its energy earliest and hence the coverage hole will be created. This paper takes into consideration the remaining energy of each sensor. Then, the proposed Weighted Voronoi Diagram will be constructed for determining each sensor’s monitoring area based on the remaining energy of each sensor to achieve the energy-balancing and full coverage.
50
Su, Feng-Yi, and 蘇峰毅. "A RFID Secure Data Transfer Protocol in ZigBee Environments." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/79989330215430087884.
Анотація:
碩士世新大學
資訊管理學研究所(含碩專班)
97
Wireless Network Communication has been a popular research area recently, among the technologies, ZigBees has been known to its low-cost and low power consumption features. In addition to its low-cost and low power consumption features, ZigBee provides more secured methods in data authentication and encryption for security aspect, such as CMM* model: Link-Key, Network-Key, and AES-CCM-128 algorithm to encrypt data in point-to-point communication to protect systems from various attacks. Further, ZigBee plays trusted center role through Full-Functional Device (FFD) in network environment, manages encrypted keys creation and distribution with other points and provide the function of cross certificate between network devices by utilizing SKKE protocol. This study utilizes passive RFID tags, mutual authentication, secure accesses to RFID and low computation cost and low communication cost properties to achieve integration between different types of networks. The study divides the authentication flow into three stages: registration, sign-on and key exchange and mainly uses the built-in security feature of ZigBee to add on the security authentication mechanism of RFID which most investigated in the issues of cross certificate and data security between RFID readers and RFID tags. By integrating ZigBee’s SKKE protocol and CMM* encryption and decryption modes with mechanism proposed by previous works, we extend the authentication mechanism originally only between RFID readers and RFID tags to RFID readers and back-bone server. Eventually, all the data from back-bone sever through RFID reader to RFID tag can be cross authenticated and meet the encrypted data transferring mechanism by distributed keys from ZigBee trusted center and SKKE protocol.