Modeling of Customer Retrial Phenomenon in Cellular Mobile Networks

In the planning of modern cellular mobile communication systems customer behavior has to be carefully taken into account In this paper two models dealing with the call retrial phenomenon are presented The rst model considers a base station with a nite customer population and repeated attempts A Markov chain modeling is proposed and a recursive solution of the state probabilities is presented The second model focuses on the use of the guard channel concept to prioritize the handover tra c Again the retrial phenomenon plays an important role The in uence of the repeated attempt e ect on the quality of service experienced by the mobile customers is discussed by means of numerical results