Implantação heterogênea de LoRaWan para redes IOT dependentes de aplicativos
DOI:
https://doi.org/10.5935/jetia.v8i34.798Resumo
Neste estudo, apresentamos uma rede LoRa heterogênea dependente de aplicação. Estudos anteriores sobre LoRaWAN e particularmente estudos que dependem do uso de taxa de dados adaptativa para otimizar o desempenho da rede são baseados puramente na perda de caminho dos nós na rede com a suposição de que todos os nós da rede têm requisitos semelhantes em termos de taxa de dados e latência. Em uma implantação em escala real da vida real, é improvável que seja o caso, pois a atual tendência de implantação do LoRaWAN mostra que as implementações práticas são baseadas em serviços. Essa abordagem significa que aplicativos críticos sofrerão problemas de confiabilidade, pois terão que competir com serviços não críticos pelos mesmos recursos. Para resolver este problema, propomos um LoRaWAN heterogêneo que é capaz de fornecer suporte para aplicações que variam de tolerantes a atrasos a intolerantes a atrasos com confiabilidade aprimorada por meio de alocação preferencial de parâmetros de transmissão. Nosso estudo mostra que essa abordagem pode aumentar a probabilidade de transmissão de uplink bem-sucedida dos aplicativos críticos em até 44% e para nós de transmissão em um raio de 3 km do gateway, LoRaWAN heterogêneo possui uma taxa de entrega de pacotes uplink 20% maior em comparação com a rede homogénea ao custo de um consumo de energia ligeiramente superior.
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