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A novel methodology is proposed for the analysis of the IP packet delay performance of SR-ARQ mechanisms in a generalized wireless system. A simulation model of the system including a novel channel model is described and results are obtained for a range of IP packet size. To demonstrated the efficacy of the methodology, the test scenario is tailored to the transmission of small packets containing real-time data carried over an EGPRS system. The results show that the use of a mean value for IP packet delay estimation is of limited use when small packets are considered.