Estimação de Probabilidade de Transbordo do Buffer em Redes OFDM-TDMA utilizando Cadeias de Markov e Curva de Serviço

Flávio Henrique Teles Vieira, Victor Hugo Teles Costa, Lee Luan Ling, Flávio Geraldo Coelho Rocha

Abstract


Este trabalho apresenta duas abordagens para estimação de probabilidade de transbordo do buffer em redes OFDM-TDMA. A primeira abordagem, se baseia em Cadeias de Markov e em Teoria de Filas para descrever o desempenho do enlace de transmissão em sistemas OFDM-TDMA. A segunda abordagem se baseia em curva de serviço e no conceito de Processo Envelope.  Mais especificamente, foi proposta uma equação para estimação de probabilidade de transbordo do buffer em sistemas OFDM-TDMA. Para tal, também deduziu-se uma equação para a curva de serviço de Sistemas OFDM-TDMA. Os resultados obtidos mostram que as estimativas de probabilidade de transbordo baseadas na curva de serviço do sistema se aproximam bem dos resultados da simulação e a complexidade computacional do cálculo necessário para obtê-los é significativamente reduzida em relação ao modelo baseado em Cadeias de Markov.

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DOI: https://doi.org/10.5540/tema.2016.017.01.0003

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Trends in Computational and Applied Mathematics

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