End-to-end ATM and AAL2 delay calculation in UTRAN

This paper proposes a stochastic model of an ATM based transport network layer of a UTRAN (UMTS Terrestrial Radio Access Network) that transmits the user data of different services such us voice, real time (RT) data and non-real time (NRT) data. Based on this stochastic model a numerical method is presented for the approximate analysis of end-to-end delay in UTRAN. A detailed discussion is provided about the “real life” traffic behavior of the considered Radio Access Network (RAN) and the applied modeling assumptions. The proposed method applies a “twoparameter” approximation, i.e., it provides not only the mean, but also the variance of the end-to-end delay. The applicability and the precision of the proposed method are demonstrated via numerical examples.