A D-BMAP/D/1 queuing model is applied to analyzing the performance of GPRS data services

such as mean RLC/MAC queue length

mean delay and loss rate of mini-packets

in which a simplified one-phase access procedure and different service rate are taken into account.The analysis results show that:Delay and loss rate are reduced with longer timer

T

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;Delay is increased under the greater probability with which mobile station in the idle state generates new session;Loss rate is decreased with larger buffer size.But delay is changed unclearly with the number of packet calls in a session.