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Relevant bibliographies by topics / Control de acceso al medio (MAC) / Dissertations / Theses

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Dissertations / Theses on the topic 'Control de acceso al medio (MAC)'

Author: Grafiati

Published: 29 September 2021

Last updated: 30 July 2025

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1

Kalfas, Georgios. "Medium-transparent MAC protocols for converged optical wireless networks." Doctoral thesis, Universitat Politècnica de Catalunya, 2017. http://hdl.handle.net/10803/406358.

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In order to address the explosive demand for high-capacity and omnipresent wireless access, modern cell-based wireless networks are slowly adopting two major solution roadmaps. The first is the employment of small-cell formations in order to increase the overall spectral efficiency, whereas the second is the employment of higher frequency bands, such as the mm-wave 60GHz band, that offers vast amounts of bandwidth. Depending on the specific application, the above solutions inevitably require the installation and operational management of large amounts of Base Stations (BSs) or Access Points (A

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2

Sanabria-Russo, Luis. "Collision-free WLANs: from concepts to working protocols." Doctoral thesis, Universitat Pompeu Fabra, 2016. http://hdl.handle.net/10803/397802.

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Using a deterministic backoff after successful transmissions as a distributed contention mechanism for access to the channel can draw benefits from scheduled operation, like the elimination of simultaneous transmissions, and Quality of Service (QoS). Carrier Sense Multiple Access with Enhanced Collision Avoidance (CSMA/ECA) is a compatible protocol that implements such technique, outperforming the current Medium Access Control (MAC) protocol in WiFi. This work describes several extensions to CSMA/ECA that allows it to support many more contenders in a collision-free schedule in very diverse sc

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3

Chia, Daniel Kim Boon. "Simulation of physical and media access control (MAC) for resilient and scalable wireless sensor networks." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Mar%5FChia.pdf.

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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, March 2006.<br>Thesis Advisor(s): Tri T. Ha, Weilian Su. "March 2006." Includes bibliographical references (p. 83-90). Also available online.

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4

Portillo, Jiménez Canek. "Modelado y evaluación de prestaciones de redes de sensores inalámbricos heterogéneos con ciclo de trabajo síncrono." Doctoral thesis, Universitat Politècnica de València, 2021. http://hdl.handle.net/10251/171275.

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[ES] Las redes de sensores inalámbricas (WSN) han experimentado un resurgimiento debido al desarrollo de la Internet de las Cosas (IoT). Una de las características de las aplicaciones de la IoT es la necesidad de hacer uso de dispositivos sensores y actuadores. En aplicaciones como automatización de edificios, de gestión energética, industriales o de salud, los nodos sensores que componen la WSN, transmiten información a un colector central o sink. La información es posteriormente procesada, analizada y utilizada para propósitos específicos. En cada una de estas aplicaciones, los dispositivos

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5

Torres, Norambuena Boris Antonio. "Diseño de un protocolo MAC con una multiplexión temporal eficiente para redes inalámbricas locales energéticamente autosustentables equipados con dispositivos captadores de energía." Tesis, Universidad de Chile, 2016. http://repositorio.uchile.cl/handle/2250/143669.

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Magíster en Ciencias de la Ingeniería, Mención Eléctrica. Ingeniero Civil Eléctrico<br>En la actualidad existe un crecimiento acelerado en el número de dispositivos que utilizan la red para comunicarse, sumado a que la de manda por velocidades de transmisión más altas ha aumentado. Conjuntamente con este requerimiento, existe una exigencia tácita: dispositivos más autónomos, es decir, dispositivos que tengan baterías lo suficientemente eficiente para no tener que cargarlos frecuentemente. Esto ha creado la necesidad de contar con protocolos que utilicen eficientemente el ancho de banda dispon

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6

Matte, Célestin. "Wi-Fi tracking : Fingerprinting attacks and counter-measures." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSEI114/document.

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Le récent développement des appareils portatifs possédant une interface Wi-Fi (smartphones, tablettes et « wearables ») s'accompagne d'une menace sur la vie privée de leurs utilisateurs, et sur la société toute entière. Ces appareils émettent en continu des signaux pouvant être capturés par un attaquant passif, à l'aide de matériel peu coûteux et de connaissances basiques. Ces signaux contiennent un identifiant unique appelé l'adresse MAC. Pour faire face à cette menace, les acteurs du secteur déploient actuellement une contre-mesure sur les appareils récents: le changement aléatoire de l'adre

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7

Ammar, Ibrahim A. M. "Design and analysis of energy-efficient media access control protocols in wireless sensor networks. Design and analysis of MAC layer protocols using low duty cycle technique to improve energy efficient and enhance communication performance in wireless sensor networks." Thesis, University of Bradford, 2014. http://hdl.handle.net/10454/7268.

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Wireless sensor network (WSN) technology has gained significant importance due to its potential support for a wide range of applications. Most of the WSN applications consist of a large numbers of distributed nodes that work together to achieve common objects. Running a large number of nodes requires an efficient mechanism to bring them all together in order to form a multi-hop wireless network that can accomplish some specific tasks. Even with recent developments made in WSN technology, numbers of important challenges still stand as vulnerabilities for WSNs, including energy waste sources, sy

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8

Ammar, Ibrahim Ammer Musbah. "Design and analysis of energy-efficient media access control protocols in wireless sensor networks : design and analysis of MAC layer protocols using low duty cycle technique to improve energy efficient and enhance communication performance in wireless sensor networks." Thesis, University of Bradford, 2014. http://hdl.handle.net/10454/7268.

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Wireless sensor network (WSN) technology has gained significant importance due to its potential support for a wide range of applications. Most of the WSN applications consist of a large numbers of distributed nodes that work together to achieve common objects. Running a large number of nodes requires an efficient mechanism to bring them all together in order to form a multi-hop wireless network that can accomplish some specific tasks. Even with recent developments made in WSN technology, numbers of important challenges still stand as vulnerabilities for WSNs, including energy waste sources, sy

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9

Muhammad, Murtala. "Enhancing the energy efficiency of ultra wideband (UWB) based media access control (MAC) protocols in mobile ad-hoc networks (MANETs) through the use of steerable directional antenna." Thesis, University of Salford, 2018. http://usir.salford.ac.uk/46756/.

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Energy efficiency contributes to the survival of nodes in Mobile Ad Hoc Networks (MANETs). The use of directional antennas can conserve energy due to the increased gain and directed transmission towards specific point in space. Directional antennas also resolve many issues associated with interference from different points within the network. Despite the vast body of work in this area, research on the way directional antennas access the wireless medium specific to Ultra-WideBand (UWB) systems have not gained wide attention. The aim of this research is to design, implement and test an improved

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10

Junior, Renato Ferreira Fernandes. "Protocolo assíncrono de acesso ao meio iniciado pelo receptor para redes de sensores sem fio." Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18153/tde-13122018-161212/.

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A internet das coisas é considerada um novo sistema de comunicação que promete otimizar e melhorar diferentes áreas de aplicação com base em módulos sensores e objetos unicamente interligados através da internet. Em aplicações de redes de sensores sem fio em larga escala, as redes possuem características peculiares, como grande quantidade de módulos sensores de baixa potência, consumo limitado e perdas de comunicação intermitentes. Estas redes precisam operar com protocolos escaláveis e eficientes em termos de consumo de energia. Desta forma, esta tese propõe um protocolo multicanal assíncrono

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11

Casanova, Calvo Vicente Fermín. "Sistemas de control basados en red. Modelado y diseño de estructuras de control." Doctoral thesis, Universitat Politècnica de València, 2008. http://hdl.handle.net/10251/1864.

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Sistemas de Control Basados en Red es el término que se emplea para referirse a un tipo especial de sistemas de control, que se caracterizan por la utilización un medio de comunicación compartido para la transferencia de información entre el controlador y la planta controlada. Esto significa que, a diferencia de un sistema de control discreto convencional, en este tipo de sistemas el mismo medio de comunicación es empleado para establecer varios bucles de control e incluso para otro tipo de tareas no relacionadas con el control. El hecho de utilizar un enlace de uso no exclusivo para cerrar el

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12

Tuset, Peiró Pere. "Contributions to the development of active RFID systems at the 433 MHz band." Doctoral thesis, Universitat Oberta de Catalunya, 2015. http://hdl.handle.net/10803/401894.

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Donat el potencial de la tecnologia RFID activa, aquesta tesi contribueix al seu desenvolupament centrant-se en les capes més baixes de la pila de protocols, és a dir, la capa física i la capa d'enllaç de dades. Aquestes capes determinen l'abast de la comunicació entre l'interrogador i les etiquetes, el nombre d'etiquetes que un interrogador pot llegir per segon i el consum d'energia que utilitzen les etiquetes en el procés, que en són els paràmetres de rendiment clau. A la capa física la tesi avalua els aspectes de propagació de la banda 433 MHz en diferents entorns i els compara amb la banda

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13

Berrios-Ayala, Mark. "Brave New World Reloaded: Advocating for Basic Constitutional Search Protections to Apply to Cell Phones from Eavesdropping and Tracking by Government and Corporate Entities." Honors in the Major Thesis, University of Central Florida, 2013. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/1547.

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Imagine a world where someone’s personal information is constantly compromised, where federal government entities AKA Big Brother always knows what anyone is Googling, who an individual is texting, and their emoticons on Twitter. Government entities have been doing this for years; they never cared if they were breaking the law or their moral compass of human dignity. Every day the Federal government blatantly siphons data with programs from the original ECHELON to the new series like PRISM and Xkeyscore so they can keep their tabs on issues that are none of their business; namely, the personal

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14

Lin, Chang-Guang, and 林長廣. "Implementation of Media Access Control(MAC) for RFID Reader and Tag." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/13854472141078763183.

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碩士<br>國立中正大學<br>通訊工程研究所<br>96<br>Radio-frequency identification (RFID) is an automatic identification method, relying on storing and remotely retrieving data using devices called RFID tags or transponders. According to the ways of tags’ backscatter and their capability of read and write, tags can be divided into six classes, from class-0 to class-5. We will discuss Class-1 Generation-2 (C1G2) RFID which communicates at 860MHz to 960MHz. We consider an RFID system that comprises a host computer, a Reader, and a tag. We will discuss the protocol for the communication of reader and tag, and use t

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15

Gama, Oscar. "A MAC protocol for quality of service provisioning in adaptive biomedical wireless sensor networks." Doctoral thesis, 2011. http://hdl.handle.net/1822/19742.

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Doctorate program on Electronics and Computer Engineering<br>New healthcare solutions are being explored to improve the quality of care and the quality of life of patients, as well as the sustainability and efficiency of the healthcare services. In this context, wireless sensor networks (WSNs) constitute a key technology for closing the loop between patients and healthcare providers, as WSNs provide sensing ability, as well as mobility and portability, essential characteristics for wide acceptance of wireless healthcare technology. Despite the recent advances in the field, the wide adopt

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16

Watwe, Siddharth P. "Efficient Schemes for Improving the Performance of Clock Synchronization Protocols in Wireless Sensor Networks Using TDMA- based MAC Protocols." Thesis, 2015. http://etd.iisc.ac.in/handle/2005/3550.

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Clock synchronization in a wireless sensor network (WSN) is essential as it provides a consistent and a coherent time frame for all the nodes across the network. Typically, clock synchronization is achieved by message passing using carrier sense multiple access (CSMA) for media access. The nodes try to synchronize with each other, by sending synchronization request messages. If many nodes try to send messages simultaneously, contention-based schemes cannot efficiently avoid collisions which results in message losses and affects the synchronization accuracy. Since the nodes in a WSN have limite

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17

Watwe, Siddharth P. "Efficient Schemes for Improving the Performance of Clock Synchronization Protocols in Wireless Sensor Networks Using TDMA- based MAC Protocols." Thesis, 2015. http://etd.iisc.ernet.in/2005/3550.

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Clock synchronization in a wireless sensor network (WSN) is essential as it provides a consistent and a coherent time frame for all the nodes across the network. Typically, clock synchronization is achieved by message passing using carrier sense multiple access (CSMA) for media access. The nodes try to synchronize with each other, by sending synchronization request messages. If many nodes try to send messages simultaneously, contention-based schemes cannot efficiently avoid collisions which results in message losses and affects the synchronization accuracy. Since the nodes in a WSN have limite

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18

Pereira, Nuno Alexandre Magalhães. "Efficient aggregate computations in large-scale dense wireless sensor networks." Doctoral thesis, 2010. http://hdl.handle.net/1822/11070.

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Tese de doutoramento em Informática<br>Assuming a world where we can be surrounded by hundreds or even thousands of inexpensive computing nodes densely deployed, each one with sensing and wireless communication capabilities, the problem of efficiently dealing with the enormous amount of information generated by those nodes emerges as a major challenge. The research in this dissertation addresses this challenge. This research work proves that it is possible to obtain aggregate quantities with a timecomplexity that is independent of the number of nodes, or grows very slowly as the number

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19

Bhatia, Ashutosh. "Distributed TDMA-Scheduling and Schedule-Compaction Algorithms for Efficient Communication in Wireless Sensor Networks." Thesis, 2015. http://etd.iisc.ac.in/handle/2005/3552.

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A wireless sensor network (WSN) is a collection of sensor nodes distributed over a geographical region to obtain the environmental data. It can have different types of applications ranging from low data rate event driven and monitoring applications to high data rate real time industry and military applications. Energy efficiency and reliability are the two major design issues which should be handled efficiently at all the layers of communication protocol stack, due to resource constraint sensor nodes and erroneous nature of wireless channel respectively. Media access control (MAC) is the proto

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20

Bhatia, Ashutosh. "Distributed TDMA-Scheduling and Schedule-Compaction Algorithms for Efficient Communication in Wireless Sensor Networks." Thesis, 2015. http://etd.iisc.ernet.in/2005/3552.

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A wireless sensor network (WSN) is a collection of sensor nodes distributed over a geographical region to obtain the environmental data. It can have different types of applications ranging from low data rate event driven and monitoring applications to high data rate real time industry and military applications. Energy efficiency and reliability are the two major design issues which should be handled efficiently at all the layers of communication protocol stack, due to resource constraint sensor nodes and erroneous nature of wireless channel respectively. Media access control (MAC) is the proto

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