Enumerative combinatorics
Concrete Mathematics: A Foundation for Computer Science
Concrete Mathematics: A Foundation for Computer Science
On the area swept under the occupation process of an M/M/1 queue in a busy period
Queueing Systems: Theory and Applications
A direct approach to sojourn times in a busy period of an M/M/1 queue
Queueing Systems: Theory and Applications
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We analyze the service times of customers in a stable M/M/1 queue in equilibrium depending on their position in a busy period. We give the law of the service of a customer at the beginning, at the end, or in the middle of the busy period. It enables as a by-product to prove that the process of instants of beginning of services is not Poisson. We then proceed to a more precise analysis. We consider a family of polynomial generating series associated with Dyck paths of length 2n and we show that they provide the correlation function of the successive services in a busy period with n+1 customers.