Performance Evaluation - Performance modelling and evaluation of heterogeneous networks
International Journal of Communication Systems
PCS networks with correlated arrival process and retrial phenomenon
IEEE Transactions on Wireless Communications
A multiserver retrial queue with a finite number of sources of primary calls
Mathematical and Computer Modelling: An International Journal
Modeling of customer retrial phenomenon in cellular mobile networks
IEEE Journal on Selected Areas in Communications
Performance Analysis of a Block-Structured Discrete-Time Retrial Queue with State-Dependent Arrivals
Discrete Event Dynamic Systems
A new computational algorithm for retrial queues to cellular mobile systems with guard channels
Computers and Industrial Engineering
Steady state analysis of level dependent quasi-birth-and-death processes with catastrophes
Computers and Operations Research
A new queueing model for spectrum renting in mobile cellular networks
Computer Communications
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Many of the currently used cellular networks have been constructed on the premise that the retrial phenomenon is negligible and the operating environment is static. However, a proper modeling of the mobile cellular network cannot ignore the existence of repeated calls. Moreover, real systems often operate in varying environment conditions. In this paper, we show how the matrix-analytic formalism gives one the ability to construct and study versatile cellular mobile networks with user retrials operating in random environment. More concretely, we investigate two four-dimensional Markovian models which allow us to represent two different options for the use of the guard channel concept. We put emphasis on the numerical evaluation of the redial behavior and the environmental factors on the system performance. This implies the performance analysis of a variety of descriptors including blocking probabilities (handover and fresh calls), mean average analysis, and waiting time in orbit.