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Previous issue date: 2015-03-20 / Improvements in Wireless Sensor Networks (WSNs) are constantly being proposed and one of the challenges is to develop the ability to create smarter dynamics so that it can adapt to the needs that arise in the environment. This work proposes three algorithms for networks based on tree topology: (i) Reorganization of Optimal Power algorithm, (ii) Best Channel Choice Based on ScanED algorithm and (iii) Self-Organizing algorithm, which is the result of the implementation of the first two simultaneously. This last algorithm makes decisions based on metrics such as LQI, RSSI, transmission power, operation channel, CCA and energy detected in channel. The benefits of using this algorithm are: (i) reduction of energy consumption, (ii) reduction of electromagnetic interference in the environment, (iii) achieving a more suitable topology for the needs of the WSN, (iv) reduction of the communication error rate, thus reducing collisions and retransmission of frames, and (v) periodic selection of a clean channel to operate. / Redes de Sensores Sem Fio (RSSFs) est?o em constante desenvolvimento e entre as melhorias propostas est? o suporte ao comportamento din?mico dos sensores, para que possam se adaptar ?s necessidades que surgem no ambiente. Neste trabalho s?o propostos tr?s algoritmos para redes com topologia em forma de ?rvore, denominados de: (i) algoritmo de Reorganiza??o de Pot?ncia ?tima (RPO), (ii) algoritmo de Escolha do Canal de Opera??o Baseado no ScanED (ECOBS) e (iii) algoritmo de Auto-organiza??o (AO), que ? o resultado da execu??o dos dois primeiros simultaneamente. Este ?ltimo algoritmo toma decis?es baseado nas m?tricas LQI, RSSI, pot?ncia de transmiss?o, canal de opera??o, CCA e energia detectada no canal. Como benef?cios da utiliza??o deste algoritmo s?o ressaltados: (i) a redu??o do consumo de energia, (ii) a diminui??o da interfer?ncia eletromagn?tica no ambiente, (iii) o alcance de uma topologia mais adequada para as necessidades da RSSF, (iv) a diminui??o da taxa de erros de comunica??o, reduzindo as colis?es e retransmiss?es de frames, e (v) a sele??o peri?dica do canal mais limpo para operar.
| Identifer | oai:union.ndltd.org:IBICT/oai:tede2.pucrs.br:tede/6051 |
| Date | 20 March 2015 |
| Creators | Sieben, Felipe Groisman |
| Contributors | Marcon, C?sar Augusto Missio |
| Publisher | Pontif?cia Universidade Cat?lica do Rio Grande do Sul, Programa de P?s-Gradua??o em Ci?ncia da Computa??o, PUCRS, Brasil, Faculdade de Inform?tica |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da PUC_RS, instname:Pontifícia Universidade Católica do Rio Grande do Sul, instacron:PUC_RS |
| Rights | info:eu-repo/semantics/openAccess |
| Relation | 1974996533081274470, 600, 600, 600, -3008542510401149144, 3671711205811204509 |
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