Mecanismos de coordenação ator-ator em redes de sensores e atores sem Fio

• Ano de defesa: 2009
• Autor(a) principal: Strzykalski, Marcelo da Silva
• Orientador(a): Fernandes, Luiz Gustavo Leão
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Pontifícia Universidade Católica do Rio Grande do Sul; Porto Alegre
• Palavras-chave em Português: INFORMÁTICA; REDES DE SENSORES SEM FIO; AVALIAÇÃO DE DESEMPENHO (INFORMÁTICA); ARQUITETURA DE REDES; COMUNICAÇÕES SEM FIO
• Link de acesso: http://hdl.handle.net/10923/1638

Wireless sensor and actor networks are distributed, embedded systems comprised of sensors and actor nodes communicating in an ad hoc manner through wireless links. Sensors are small, lowcost devices with limited computing and communication capabilities responsible for collecting information about the physical world. Actors are devices with longer battery life and better computing and communication capabilities that perform actions in the controlled environment. Sensors and actors collaborate to monitor and react to changes in the surrounding world within specified times. Sensors perform sensing and report sensed data to the actors, while the actors coordinate with each other to take decisions on the most appropriate way to act in the physical world in response to the events detected by sensors. Actor-actor coordination consists on the selection of the actor or set of actors that should perform the action in the environment, coordinating with each other in the best way to maximize the overall task execution performance. In accordance to this definition, actor nodes should coordinate autonomously to take decisions within timing constraints, and as a consequence, actions would be performed in the controlled system. However, few works in the literature propose mechanisms focused on such situations. Thus, the main contribution of this work resides in the identification of strategies applied to the development of actor-actor coordination mechanisms, as well as in the implementation and performance evaluation of mechanisms derived from such strategies.