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One of the important features of 3G mobile cellular communication is utilization of multilayer cells to support overflow traffic of lower layer cells. This paper deals with traffic model of three layer cells i.e. micro cell, macro cell and satellite cell. State transition chain is designed for theoretical analysis of traffic of three layer cell. Different traffic parameters such as call blocking probability, probability of utilization of micro cell channel, macro cell channel and satellite cell channel are derived from proposed state transition diagram and depicted graphically yields logical results.