Mobile Networks Optimization Using Open-Source GRASS-RaPlaT Tool and Evolutionary Algorithm

The process of LTE and LTE-A mobile networks optimization for 900 MHz radio signal using the open-source GRASS-RaPlaT tool and evolutionary algorithm is presented. The aim of the proposed solution is to reduce operational costs and to maximize network efficiency. Based on the terrain profile maps and construction locations, the tool calculates path loss by applying state-of-the-art statistical models and determines the optimal base station locations and parameters by maximizing defined criteria functions. The optimization has been tested on a selected area in Ljubljana, Slovenia. The obtained results show that the key network characteristics such as signal coverage, carrier-to-interference ratio and network capacity can be increased by tuning various base station parameters such as transmission power, antenna direction and location.