GSM and UMTS mobility simulator

Cataloged from PDF version of article.In this thesis, a mobility simulator for GSM and UMTS has been designed and implemented using Visual C#.Net. The objective has been to design and implement such a simulator that can be used to create and study different traffic load scenarios and mobility patterns that can cause congestion situations. The modular approach adopted for the GSM and UMTS simulator allow us to evaluate the performance of new services. The simulator uses propagation simulation results and terrain profile data to produce capacity and performance metrics related to GSM and UMTS networks. The capacity and the service quality of the network are assessed in a long-term system level simulation scheme. Mobility generation is the core of the simulator program. It generates random paths for the mobile users in the simulation. Then the effects of the mobility patterns of the users on the system capacity are investigated. In GSM mobility simulator, mobility, traffic generation, call-admission and handover are implemented. In UMTS, in addition to GSM modules, power control and soft handover generation is implemented.Öner, MehmetM.S

Analytical Characterization of the Soft Handover Gain in UMTS

Abstract - Soft handover is one of the key features in UMTS networks. For a sophisticated network planning it is necessary to understand the influence of soft handover on the capacity and coverage of UMTS systems which is expressed by the soft handover gain. In this paper we derive a method for computing interference distributions for UMTS networks with and without soft handover. Thus, we are able to show the benefit of soft handover resulting in an increased coverage area. Furthermore, the soft handover gain is characterized for both homogeneous and inhomogeneous UMTS networks with hexagonal as well as with irregular BS layouts. In particular, it is shown that the soft handover gain is increasing with the degree of inhomogeneity of the traffic intensity