12.07.2015 Views

Tema 2 – Teletráfico Dimensionado de Sistemas

Tema 2 – Teletráfico Dimensionado de Sistemas

Tema 2 – Teletráfico Dimensionado de Sistemas

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Re<strong>de</strong>s Telefónicas <strong>–</strong> <strong>Tema</strong> 2: <strong>Teletráfico</strong>. <strong>Dimensionado</strong> <strong>de</strong> sistemasSistema <strong>de</strong> espera pura: M/M/S Como la suma <strong>de</strong> todas las probabilida<strong>de</strong>s tiene que ser 1…∞∑k=0P∞k∑k=S+1= 1kAS!→1k−SSPk=S+1kAk!A ⎞⎟S ⎠k=S+1k−SSAS! Tenemos finalmente que…S∑k=0=∞0∑⎛⎜⎝+∞∑P0kAS!SA=S!1k−S∞S∑t=0⎛⎜⎝= 1A ⎞⎟S ⎠A < St+1→SA=S!P0AS1−AS=S∑k=0kAk!+1SAS!AS1−ASPii⎧ A⎪⎪i!⎪= ⎨i⎪A1⎪ i−⎪S! S⎪⎩S∑k=0SkAk!S∑k=0+kAk!1SAS!1SA+S!AS − AAS − Ai ≤ Si > SRamón Agüero Calvo49

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