Um protocolo de roteamento tolerante a interrupções de comunicação para redes sem fios móveis em cenários de emergência
Ano de defesa: | 2009 |
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Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal de Minas Gerais
UFMG |
Programa de Pós-Graduação: |
Não Informado pela instituição
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Departamento: |
Não Informado pela instituição
|
País: |
Não Informado pela instituição
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Palavras-chave em Português: | |
Link de acesso: | http://hdl.handle.net/1843/BUOS-9KRNPZ |
Resumo: | In critical and emergency scenarios, such as natural disasters, technological or man made, first-responders can building mobile ad hoc networks addressing the lack of network communication infrastructure. In a mobile ad hoc network nodes communicate without the need of a fixed access point. Perhaps, communication in such scenarios may become susceptible to long interruptions. The Delay/Disruption Tolerant Networks are a proposal approach when communication is intermittent. The DTN support communication disruption storing messages and fowarding it when a connection occurs. Due the requirement of storing capability, the nodes must have available resources to store messages. The Epidemic and PROPHET routing protocols have good perfomance when the nodes has a high buffer storage capability, perhaps in the most mobile devices storage resources has tight storage resource. This dissertation presents a disruptiont tolerant communication routing protocol, called HIGROP {HIerarquical Group ROuting Protocol). The HIGROP has as goal increase message delivery rate in a disruption network without having an impact on the communication overhead, optimizing the use of the nodes resource. To our best knowledge, HIGROP is the first protocol that build a hierarquical model to mademessage routing with in a network wich node has arbitrary movements. The HIGROP cluster neighbors nodes and elect a leader for each clustere. The messages are only forwarding to a leader node and leader become responsible to message delivery to the destination or to a foreign node cluster. We compare HIGROP to other similar protocols using a group mobility model for such disasters scenarios in a simulation tool. We noticed that HIGROP has up to 65% better message delivery rate than Epidemic and Prophet protocols when messagestorage buffer is limited and it is scalable. The communication overhead keeps stable in all analyzed scenarios. |