|
Abstract:
|
The work shown in this thesis is an analysis of network simulations obtained from the use of High Altitude Platforms in the radio access network of UMTS. The work was aimed to find an optimal configuration for a single HAP scenario, and to apply this optimal configuration to a multi-HAP scenario. The results for the analysis of both cases have been simulated using the NPSW static simulator software tool. For the single HAP scenario, a set of different cell layouts with different antenna beamwidths were simulated. Each one of these configurations was simulated in different load cases, using a wide traffic scale. The results obtained from the analysis of a single HAP scenario lead to a planning rule for the configuration of the antennas on board. This planning rule is used for the multi-HAP scenario, where three HAPs provide UMTS coverage jointly. The analysis for the multi-HAP architecture was focused on finding the optimal distance between HAPs. The basic parameters for the simulations such as traffic density and configuration of the antennas on board are the same as used for a single HAP scenario. This is due to the fact that the variable under study in this multi-HAP architecture is the distance between HAPs. Consequently the results obtained show the variation of the network performance with the separation between HAPs. |