In this paper, we analyze a hierarchical cellular system with finite queues for new and handoff calls. Both the effect of the reneging of waiting new calls because of the callers’ impatience and the effect of the dropping of queued handoff calls as the callers move out of the handoff area are considered, besides the effect of guard channel scheme. We successfully solve the system by adopting th...

In this paper, we survey results for the GI/GI/N + GI queueing model. Our focus is on finding situations in which simple performance measure approximations can be developed. To do this, we study the behavior of the GI/GI/N + GI queue in the conventional heavy traffic and Halfin-Whitt limit regimes, and we also discuss the overloaded regime in which there is a single server as well as the overlo...

We consider a markovian multiserver queue with a finite waiting line in which a customer may decide to leave and give up service if its waiting time in queue exceeds its random deadline. We focus on the performance measure in terms of the probability of being served under both transient and stationary regimes. We investigate monotonicity properties of first and second order of this performance ...