Abstract
AbstractThis paper discusses a TDM multi‐access channel that supports hybrid switching including circuit switched voice and packet switched data as KC classes with a finite number of open sessions. The channel is partitioned into KC sub‐channels that are assigned to classes. Applications are hybrid switching in mobile TDMA (e.g. GSM/GPRS cellular networks) and time division multiplexing systems. Herein, an original analysis for such mixed services is derived. In this paper, a new Markov model for voice traffic in each sub‐channel is shown. The system is modelled with an irreducible continuous time and aperiodic Markov process and a non‐homogenous finite QBD process based on macrostructure model of TDM channel is derived. A novel computational algorithm is then formulated. Using the computational algorithm, performance metrics of the system such as mean delay in the queue as well as average number of data users in queue will be obtained. QoS is defined and the advantage of channel sharing is highlighted. Numerical results are corroborated by simulation. Copyright © 2004 AEI
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