LRD) traffic, the Hurst parameter H is used to indicate the self-similarity. And the decaying rate of the ACF, i.e. 6, can be estimated with the Hurst parameter with 6 = 2*(1-H). Then the Hurst parameter value can be obtained from the measurement. With the three hyper-exponential distribution parameters, i.e. a1, A2, p1, and an additional parameter 6, the four parameters of the MMPP model can be derived with the following formulas. 6.4 Dimensioning for Transport Network Performance n-19-216 (6.63) where 6.4.3.5 Validations This section validates the proposed analytical dimensioning approaches by comparing the analytical results with the simulation results. The following gives some validation examples. The dimensioned lub bandwidth from the simulations is obtained from the UMTS simulation model. The simulation scenario is a single lub link scenario, consisting of one Node B and one RNC connected with each other via the lub link. In the investigations, the QoS requirements in UTRAN is that the acceptable FP PDU delay considered for voice service is within 10 ms for 99% of voice packet transmissions and below 30 ms for data services for 99% of the packet-switched traffic packet transmissions. Those packets whose experienced FP PDU delays violate the given values would be discarded. That means, a maximum of 1% packet loss ratio is allowed for both voice and packet-switched data services. For all scenarios the simulations run 3600 simulated seconds. The stability and reliability of the measured statistics of packet loss ratio and queuing delay distribution from simulations are evaluated by Confidence Intervals (CI) and Limited Relative Error (LRE). A few examples are given for the CI in Appendix A.20 and for LRE in A.21. Figure 6.50 compares the dimensioning results for the voice only scenario from the simulations using the Rel99 UMTS model (system simulation) and the analytical solutions presented in section 6.4.3.2 (analytical calculation). In addition, simple simulations of the MMPP/D/1 queuing model in OPNET (queu