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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> sistemasProcesos <strong>de</strong> nacimiento y muerte La tasas <strong>de</strong> nacimiento y muerte en el estado j serán, respectivamente, λ j yµ j Luego la probabilidad <strong>de</strong>l estado ‘N’ en t+ ∆t, P N (t+ ∆t), vendrá dada por:PN( t + ∆t) = P ( t) [( 1−∆t)( 1−µ ∆t) + o( ∆t)] + P ( t) [ λ ∆t µ ∆t + o( ∆t)]N+ P+ PN+1N−1( t) [ µ ∆t( 1−λ ∆t) + o( ∆t)]N+1( t) [ λ ∆t( 1−µ ∆t) + o( ∆t)]N−1N+1N−1 Despreciando términos en o(∆t)…PPλ + (1)NN( t + ∆t) = P ( t) [ 1−( λ + µ ) ∆t] + P ( t)[ µ ∆t] P ( t)[ λ ∆t]PNNN N N+ 1 N+1+N−1N-1NN( t + ∆t) −PN( t) = { −PN( t) [( λN+ µN)] + PN+ 1( t)[ µN+1] + PN−1( t)[ λN-1]}( t + ∆t) −PN( t)= −P( t) [( λ + µ )] + P ( t)[ µ ] + P ( t)[ λ ]∆tNNNN+1+NN+1NNN−1N-1∆t(2)(3)Ramón Agüero Calvo31

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