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All GSM operators use Key Performance Indicators (KPIs) to judge their network performance and evaluate the Quality of Service (QoS) regarding end user perspective. All the events being occurred over air interface are triggering different counters in the Base Station Controller (BSC). The KPIs are derived with the help of these counters using different formulations. In this paper, a well established real GSM Radio Frequency (RF) network performance evaluation is presented on the basis of four major KPIs i.e., Call Set up Success Rate (CSSR), Call Drop Rate (CDR), Handover Success Rate (HSR) and Radio Traffic Channel (TCH) congestion rate.
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