Queueing Systems

, Volume 6, Issue 1, pp 89–108 | Cite as

Tandem behavior of a telecommunication system with finite buffers and repeated calls

  • Behnam Pourbabai
Invited Paper


The tandem behavior of a telecommunication system with finite buffers and repeated calls is modeled by the performance of a finite capacityG/M/1 queueing system with general interarrival time distribution, exponentially distributed service time, the first-come-first-served queueing discipline and retrials. In this system a fraction of the units which on arrival at a node of the system find it busy, may retry to be processed, by merging with the incoming arrival units in that node, after a fixed delay time. The performance of this system in steady state is modeled by a queueing network and is approximated by a recursive algorithm based on the isolation method. The approximation outcomes are compared against those from a simulation study. Our numerical results indicate that in steady state the non-renewal superposition arrival process, the non-renewal overflow process, and the non-renewal departure process of the above system can be approximated with compatible renewal processes.


Queueing network approximation retrials telecommunication simulation overflow process departure process superposition process 


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Copyright information

© J.C. Baltzer A.G. Scientific Publishing Company 1990

Authors and Affiliations

  • Behnam Pourbabai
    • 1
  1. 1.Department of Mechanical EngineeringThe University of MarylandCollege ParkUSA

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