Introduction of Simulation Models

Zusammenfassung

Simulation is a practical and scientific approach to analyze a complex system. In this thesis, simulation is used to investigate the dimension of the UMTS radio access networks. From the simulation results, important dimensioning rules can be derived and the proposed analytical dimensioning approaches can be verified. This chapter introduces in detail different UMTS simulation models which have been developed and used in this thesis. The simulation models of the UMTS Rel99 with the ATM-based UTRAN and the UMTS with the IP-based UTRAN were developed by the author in the framework of the MATURE project. The main objective of this project is the dimensioning of the UTRAN Iub interface. The simulations of HSPA (HSDPA and HSUPA) were using the HSPA simulation models established in the context of another project by Communication Networks working group of the University of Bremen. At the beginning of this chapter, the main requirements on the simulation models are defined. Then a basic framework for setting up the simulation models is described. Afterwards, the simulation environment and detailed introductions on the modeling of different UMTS networks are given. The last section introduces different traffic models.