Transcription of 1 IEOR 6711: Notes on the Poisson Process
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1 IEOR 6711: Notes on the Poisson Process
Copyright c 2009 by Karl Sigman 1 IEOR 6711 : Notes on the Poisson Process We present here the essentials of the Poisson point Process with its many interesting properties. As preliminaries, we first define what a point Process is, define the renewal point Process and state and prove the Elementary Renewal Theorem. Point Processes Definition A simple point Process = {tn : n 1} is a sequence of strictly increas- ing points 0 < t1 < t2 < , (1). def with tn as n . With N (0) = 0 we let N (t) denote the number of points that fall in the interval (0, t]; N (t) = max{n : tn t}. {N (t) : t 0} is called the counting Process for . If the tn are random variables then is called a random point Process . def We sometimes allow a point t0 at the origin and define t0 = 0. Xn = tn tn 1 , n 1, is called the nth interarrival time.)
1.3 Poisson point process There are several equivalent de nitions for a Poisson process; we present the simplest one. Although this de nition does not indicate why the word \Poisson" is used, that will be made apparent soon. Recall that a renewal process is a point process = ft …
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