On the Problems of Queues in Mixed Type Queuing Systems with Random Quantity of Sources and Size-Limited Queues
The article proposes the technique to investigate the behavior of the moments of numerical characteristics of mixed-type queuing system with a random number of sources upon the change of demands input stream intensity and size-limited queues based on the calculation of boundary values of the number of servicing devices at which the mean squared deviation (MSD) of the investigated quantity does not exceed its mathematical expectation. For the first time the linear nature of behavior of boundary values of the number of service facilities with the change of the given intensity of demands input stream is determined numerically. The article also considers various types of queues arising in queuing systems. The concept of an N-th order queue is introduced, and generalized Little’s formulas for N-th order queues in queuing systems of various types are presented.
KeywordsQueue Physical queue Real queue Quality of service (QoS) Queuing system M/M/m/K Service facility
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