Aumento do tempo de vida de redes m?veis de sensores sem fio via otimiza??o convexa

• Ano de defesa: 2016
• Autor(a) principal: Sakai, Lucas Jun
• Orientador(a): Guimar?es, Dayan Adionel
• Banca de defesa: Guimar?es, Dayan Adionel , Lugli, Alexandre Baratella , Branquinho, Omar Carvalho
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Instituto Nacional de Telecomunica??es
• Programa de Pós-Graduação: Mestrado em Engenharia de Telecomunica??es
• Departamento: Instituto Nacional de Telecomunica??es
• País: Brasil
• Palavras-chave em Português: Capta??o de energia; otimiza??o convexa; otimiza??o de tempo de vida; rede de sensores sem fio; transmiss?o de energia sem fio. xxi
• Área do conhecimento CNPq: Engenharia - Telecomunica??es
• Link de acesso: http://tede.inatel.br:8080/tede/handle/tede/150

In this dissertation, a simple and flexible method for increasing the lifetime of fixed or mobile wireless sensor networks is presented. Based on past residual energy information reported by the sensor nodes, the central node dynamically optimizes the communication activity levels of the sensor nodes to save energy without sacrificing the data throughput. The activity levels are defined to represent portions of time or time-frequency slots in a frame, during which the sensor nodes are scheduled to communicate with the sink node to report sensory measurements. Besides node mobility, it is considered that sensors? batteries may be recharged via a wireless power transmission or equivalent energy harvesting scheme, bringing to the optimization problem an even more dynamic character. It is report large increased lifetimes over the nonoptimized network.