>Hi everyone.
>
>Does anybody know an article, whitepaper, book...where I can find traffic
>modeling (for protocol IP mainly) for capacity planning designs? I mean a
>way for designing trunk capacities, known speed access of remote users and
>their connection profile, just in the same way you can design a voice
>network with an Erlang model.
>
>Thanks a lot.
>
>Juanjo Romero
>Access & Transport Networks Engineer.
>CCNA.
I like _Practical Queueing Analysis_ by Tanner. There are others,
but unfortunately I am blanking on the author and title -- something
like WAN Design Handbook. Kleinrock, especially Volume II, is the
classic, although rather dated. Mischa Schwartz is another, as is
Bertzas & Gallagher. Spohn's Data Network Design also has material.
Be aware, however, that connectionless networks do not model as well
as telephone networks. Work by Will Leland (Bellcore, Telecordia,
etc.) showed that Internet traffic distributions are fractal rather
than the exponential generally assumed.
Depending on what you are trying to do, however, you can simplify a
packet-carrying to Erlang B if the policy is to drop packets when the
link is busy, and to Erlang C when there is buffering. Not the most
scientific thing in the world, but worthwhile for first
approximations.
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